Residential/Light Commercial Generator Sets · 2 TP-6809 11/13 Engineexhaustfromthisproductcontainschemicals knowntotheStateofCaliforniatocausecancer,birth defects, or other reproductive

Residential/Light Commercial Generator Sets

Models:

38RCL48RCL60RCLController:

RDC2

TP-6809 11/13b

Installation

TP-6809 11/132

Engine exhaust from this product contains chemicalsknown to the State of California to cause cancer, birthdefects, or other reproductive harm.

WARNINGCalifornia Proposition 65

Product Identification Information

Product identification numbers determine service parts.Record the product identification numbers in the spacesbelow immediately after unpacking the products so thatthe numbers are readily available for future reference.Record field-installed kit numbers after installing thekits.

Generator Set Identification NumbersRecord the product identification numbers from thegenerator set nameplate(s).

Model Designation

Specification Number

Serial Number

Accessory Number Accessory Description

Controller IdentificationRecord the controller description from the generator setoperation manual, spec sheet, or sales invoice.

Controller Description

Engine IdentificationRecord the product identification information from theengine nameplate.

Manufacturer

Model Designation

Serial Number

Table of Contents

TP-6809 11/13 Table of Contents 3

Product Identification Information 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Precautions and Instructions 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Assistance 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 1 Installation Instructions 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.1 Introduction 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.2 Lifting Generator Set 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3 Location and Mounting 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3.1 Location Factors 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3.2 Mounting Surface 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3.3 Vibration Isolation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3.4 Prepare Site 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.3.5 Mount the Generator Set 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Electrical System 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.1 Electrical Connections 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.2 Terminal Connector Torque 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.3 Ground and Neutral Connections 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.4 Battery Chargers 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.5 Power Supply 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.6 Connect AC and DC Wiring 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.7 Automatic Transfer Switch Connection 20. . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.8 Communication Cable Specifications 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4.9 System Connections with Accessory Modules 24. . . . . . . . . . . . . . . . . . . . .1.4.10 Other Accessories 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5 Engine Starting Battery 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6 Fuel System 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.6.1 Fuel Lines 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6.2 Gas Regulators 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6.3 Install and Connect Fuel Supply 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6.4 Fuel Conversion Procedures 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.7 Cooling System 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.8 Prestart Installation Check 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.9 Set Exerciser 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.10 Operation Tests 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 2 Accessories 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.1 Introduction 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2 Block Heaters 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3 Programmable Interface Module (PIM) 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.1 PIM to Generator Set Connections 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3.2 PIM Inputs and Outputs 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Load Control Module (LCM) 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.5 OnCue Generator Management System 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 3 Generator Reconnection 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1 Voltage Reconnection 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.2 Four-Lead (Single-Phase) Generator Sets 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3 12-Lead (Three-Phase) Generator Sets 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.4 Changing System Settings 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.5 Voltage Calibration 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.1 Calibration using the RDC2 Controller Keypad and Menus 46. . . . . . . . . .3.5.2 Calibration Using SiteTech 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents, continued

TP-6809 11/13Table of Contents4

Section 4 Diagrams and Drawings 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendix A Abbreviations 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TP-6809 11/13 5Safety Precautions and Instructions

Safety Precautions and Instructions

IMPORTANTSAFETY INSTRUCTIONS.Electromechanical equipment,including generator sets, transferswitches, switchgear, and accessories,can cause bodily harm and poselife-threatening danger whenimproperly installed, operated, ormaintained. To prevent accidents beaware of potential dangers and actsafely. Read and follow all safetyprecautions and instructions. SAVETHESE INSTRUCTIONS.

Thismanual has several types of safetyprecautions and instructions: Danger,Warning, Caution, and Notice.

DANGER

Danger indicates the presence of ahazard that will cause severepersonal injury, death, orsubstantialproperty damage.

WARNING

Warning indicates the presence of ahazard that can cause severepersonal injury, death, orsubstantialproperty damage.

CAUTION

Caution indicates the presence of ahazard that will or can cause minorpersonal injury or property damage.

NOTICENotice communicates installation,operation, or maintenance informationthat is safety related but not hazardrelated.

Safety decals affixed to the equipmentin prominent places alert the operatoror service technician to potentialhazards and explain how to act safely.The decals are shown throughout thispublication to improve operatorrecognition. Replace missing ordamaged decals.

Accidental Starting

Accidental starting.Can cause severe injury or death.

Disconnect the battery cables beforeworking on the generator set.Remove the negative (--) lead firstwhen disconnecting the battery.Reconnect the negative (--) lead lastwhen reconnecting the battery.

WARNING

Disabling the generator set.Accidental starting can causesevere injury or death. Beforeworking on the generator set orequipment connected to the set,disable the generator set as follows:(1) Press the generator set off/resetbutton to shut down the generator set.(2) Disconnect the power to the batterycharger, if equipped. (3) Remove thebattery cables, negative (--) lead first.Reconnect the negative (--) lead lastwhen reconnecting the battery. Followthese precautions to prevent thestarting of the generator set by theremote start/stop switch.

Battery

Sulfuric acid in batteries.Can cause severe injury or death.

Wear protective goggles andclothing. Battery acid may causeblindness and burn skin.

WARNING

Explosion.Can cause severe injury or death.Relays in the battery chargercause arcs or sparks.

Locate the battery in a well-ventilatedarea. Isolate the battery charger fromexplosive fumes.

WARNING

Battery gases. Explosion can causesevere injury or death. Battery gasescan cause an explosion. Do not smokeor permit flames or sparks to occur neara battery at any time, particularly whenit is charging. Do not dispose of abattery in a fire. To prevent burns andsparks that could cause an explosion,avoid touching the battery terminalswith tools or other metal objects.Remove all jewelry before servicing theequipment. Discharge static electricityfrom your body before touchingbatteries by first touching a groundedmetal surface away from thebattery. Toavoid sparks, do not disturb the batterycharger connections while the batteryis charging. Always turn the batterycharger off before disconnecting thebattery connections. Ventilate thecompartments containing batteries toprevent accumulation of explosivegases.

Battery electrolyte is a dilutedsulfuric acid. Battery acid cancausesevere injury or death. Battery acidcan cause blindness and burn skin.Always wear splashproof safetygoggles, rubber gloves, and bootswhen servicing the battery. Do notopen a sealed battery or mutilate thebattery case. If battery acid splashes inthe eyes or on the skin, immediatelyflush the affected area for 15 minuteswith large quantities of clean water.Seek immediatemedical aid in the caseof eye contact. Never add acid to abattery after placing the battery inservice, as this may result in hazardousspattering of battery acid.

TP-6809 11/136 Safety Precautions and Instructions

Battery short circuits. Explosioncan cause severe injury or death.Short circuits can cause bodily injuryand/or equipment damage.Disconnect the battery beforegenerator set installation ormaintenance. Remove all jewelrybefore servicing the equipment. Usetools with insulated handles. Removethe negative (--) lead first whendisconnecting the battery. Reconnectthe negative (--) lead last whenreconnecting the battery. Neverconnect the negative (--) battery cableto the positive (+) connection terminalof the starter solenoid. Do not test thebattery condition by shorting theterminals together.

Battery acid cleanup. Battery acidcan cause severe injury or death.Battery acid is electrically conductiveand corrosive. Add 500 g (1 lb.) ofbicarbonate of soda (baking soda) to acontainer with 4 L (1 gal.) of water andmix the neutralizing solution. Pour theneutralizing solution on the spilledbattery acid and continue to add theneutralizing solution to the spilledbattery acid until all evidence of achemical reaction (foaming) hasceased. Flush the resulting liquid withwater and dry the area.

Engine Backfire/FlashFire

Fire.Can cause severe injury or death.

Do not smoke or permit flames orsparks near fuels or the fuel system.

WARNING

Servicing the fuel system. A flashfire cancausesevere injuryor death.Do not smoke or permit flames orsparks near the carburetor, fuel line,fuel filter, fuel pump, or other potentialsources of spilled fuels or fuel vapors.Catch fuels in an approved containerwhen removing the fuel line orcarburetor.

Servicing the air cleaner. A suddenbackfire can cause severe injury ordeath. Do not operate the generatorset with the air cleaner removed.

Combustible materials. A fire cancause severe injury or death.Generator set engine fuels and fuelvapors are flammable and explosive.Handle these materials carefully tominimize the risk of fire or explosion.Equip the compartment or nearby areawith a fully charged fire extinguisher.Select a fire extinguisher rated ABC orBC for electrical fires or asrecommended by the local fire code oran authorized agency. Train allpersonnel on fire extinguisheroperation and fire preventionprocedures.

Exhaust System

Carbon monoxide.Can cause severe nausea,fainting, or death.

The exhaust system must beleakproof and routinely inspected.

WARNING

Generator set operation. Carbonmonoxide can cause severe nausea,fainting, or death. Carbon monoxideis an odorless, colorless, tasteless,nonirritating gas that can cause death ifinhaled for even a short time. Avoidbreathing exhaust fumeswhenworkingon or near the generator set. Neveroperate the generator set inside abuilding. Never operate the generatorset where exhaust gas could seepinside or be drawn into a potentiallyoccupied building through windows, airintake vents, or other openings.

Carbon monoxide detectors.Carbon monoxide can cause severenausea, fainting, or death. Installcarbon monoxide detectors on eachlevel of any building adjacent to thegenerator set. Locate the detectors toadequately warn the building’soccupants of the presence of carbonmonoxide. Keep the detectorsoperational at all times. Periodicallytest and replace the carbon monoxidedetectors according to themanufacturer’s instructions.

Carbon monoxide symptoms.Carbon monoxide can cause severenausea, fainting, or death. Carbonmonoxide is a poisonous gas present inexhaust gases. Carbonmonoxide is anodorless, colorless, tasteless,nonirritating gas that can cause death ifinhaled for even a short time. Carbonmonoxide poisoning symptoms includebut are not limited to the following:D Light-headedness, dizzinessD Physical fatigue, weakness injoints and muscles

D Sleepiness, mental fatigue,inability to concentrateor speak clearly, blurred vision

D Stomachache, vomiting, nauseaIf experiencing any of these symptomsand carbon monoxide poisoning ispossible, seek fresh air immediatelyand remain active. Do not sit, lie down,or fall asleep. Alert others to thepossibility of carbon monoxidepoisoning. Seek medical attention ifthe condition of affected persons doesnot improvewithinminutes of breathingfresh air.

Fuel System

Explosive fuel vapors.Can cause severe injury or death.

Use extreme care when handling,storing, and using fuels.

WARNING

The fuel system. Explosive fuelvapors can cause severe injury ordeath. Vaporized fuels are highlyexplosive. Use extreme care whenhandling and storing fuels. Store fuelsin a well-ventilated area away fromspark-producing equipment and out ofthe reach of children. Never add fuel tothe tank while the engine is runningbecause spilled fuel may ignite oncontact with hot parts or from sparks.Do not smoke or permit flames orsparks to occur near sources of spilledfuel or fuel vapors. Keep the fuel linesand connections tight and in goodcondition. Do not replace flexible fuel

TP-6809 11/13 7Safety Precautions and Instructions

lines with rigid lines. Use flexiblesections to avoid fuel line breakagecausedby vibration. Donot operate thegenerator set in the presence of fuelleaks, fuel accumulation, or sparks.Repair fuel systems before resuminggenerator set operation.

Explosive fuel vapors can causesevere injury or death. Takeadditional precautions when using thefollowing fuels:

Propane (LP)—Adequate ventilationis mandatory. Because propane isheavier than air, install propane gasdetectors low in a room. Inspect thedetectors per the manufacturer’sinstructions.

Natural Gas—Adequate ventilation ismandatory. Because natural gas rises,install natural gas detectors high in aroom. Inspect the detectors per themanufacturer’s instructions.

Gas fuel leaks. Explosive fuelvapors can cause severe injury ordeath. Fuel leakage can cause anexplosion. Check the LP vapor gas ornatural gas fuel system for leakage byusing a soap and water solution withthe fuel system test pressurized to6--8 ounces per square inch(10--14 inches water column). Do notuse a soap solution containing eitherammonia or chlorine because bothprevent bubble formation. A successfultest depends on the ability of thesolution to bubble.

Hazardous Noise

Hazardous noise.Can cause hearing loss.

Never operate the generator setwithout a muffler or with a faultyexhaust system.

CAUTION

Engine noise. Hazardous noise cancause hearing loss. Generator setsnot equipped with sound enclosurescan produce noise levels greater than105 dBA. Prolonged exposure to noiselevels greater than 85 dBA can causepermanent hearing loss. Wear hearingprotection when near an operatinggenerator set.

Hazardous Voltage/Moving Parts

Hazardous voltage.Will cause severe injury or death.

Disconnect all power sources beforeopening the enclosure.

DANGER

Hazardous voltage.Can cause severe injury or death.

Operate the generator set only whenall guards and electrical enclosuresare in place.

Moving parts.

WARNING

Hazardous voltage.Backfeed to the utility system cancause property damage, severeinjury, or death.

If the generator set is used forstandby power, install an automatictransfer switch to prevent inadvertentinterconnection of standby andnormal sources of supply.

WARNING

Welding the generator set.Can cause severe electricalequipment damage.

Never weld components of thegenerator set without firstdisconnecting the battery, controllerwiring harness, and engine electroniccontrol module (ECM).

CAUTION

Grounding electrical equipment.Hazardous voltage can causesevere injury or death. Electrocutionis possible whenever electricity ispresent. Ensure you comply with allapplicable codes and standards.Electrically ground the generator set,transfer switch, and related equipmentand electrical circuits. Turn off themaincircuit breakers of all power sourcesbefore servicing the equipment. Nevercontact electrical leads or applianceswhen standing in water or on wetground because these conditionsincrease the risk of electrocution.

Disconnecting the electrical load.Hazardous voltage can causesevere injury or death. Disconnectthe generator set from the load byturning off the line circuit breaker or bydisconnecting the generator set outputleads from the transfer switch andheavily taping the ends of the leads.High voltage transferred to the loadduring testing may cause personalinjury and equipment damage. Do notuse the safeguard circuit breaker inplace of the line circuit breaker. Thesafeguard circuit breaker does notdisconnect the generator set from theload.

Welding on the generator set. Cancause severe electrical equipmentdamage. Before welding on thegenerator set perform the followingsteps: (1) Remove the battery cables,negative (--) lead first. (2) Disconnectall engine electronic control module(ECM) connectors. (3) Disconnect allgenerator set controller and voltageregulator circuit board connectors.(4) Disconnect the engine battery-charging alternator connections.(5) Attach the weld ground connectionclose to the weld location.

Installing the battery charger.Hazardous voltage can causesevere injury or death. Anungrounded battery charger maycause electrical shock. Connect thebattery charger enclosure to thegroundof a permanent wiring system. As analternative, install an equipmentgrounding conductor with circuitconductors and connect it to theequipment grounding terminal or thelead on the battery charger. Install thebattery charger as prescribed in theequipment manual. Install the batterycharger in compliance with local codesand ordinances.

TP-6809 11/138 Safety Precautions and Instructions

Connecting the battery and thebattery charger. Hazardous voltagecan cause severe injury or death.Reconnect the battery correctly,positive to positive and negative tonegative, to avoid electrical shock anddamage to the battery charger andbattery(ies). Have a qualifiedelectrician install the battery(ies).

Short circuits. Hazardousvoltage/current can cause severeinjury or death. Short circuits cancause bodily injury and/or equipmentdamage. Do not contact electricalconnections with tools or jewelry whilemaking adjustments or repairs.Remove all jewelry before servicing theequipment.

Engine block heater. Hazardousvoltage can cause severe injury ordeath. The engine block heater cancause electrical shock. Remove theengine block heater plug from theelectrical outlet before working on theblock heater electrical connections.

Electrical backfeed to the utility.Hazardous backfeed voltage cancause severe injury or death. Installa transfer switch in standby powerinstallations to prevent the connectionof standby and other sources of power.Electrical backfeed into a utilityelectrical system can cause severeinjury or death to utility personnelworking on power lines.

Heavy Equipment

Unbalanced weight.Improper lifting can cause severeinjury or death and equipmentdamage.

Do not use lifting eyes.Lift the generator set using lifting barsinserted through the lifting holes onthe skid.

WARNING

Hot Parts

Hot coolant and steam.Can cause severe injury or death.

Before removing the pressure cap,stop the generator set and allow it tocool. Then loosen the pressure capto relieve pressure.

WARNING

Hot engine and exhaust system.Can cause severe injury or death.

Do not work on the generator set untilit cools.

WARNING

Hot engine oil.Can cause severe injury or death.

Avoid skin contact with hot oil. Do notstart or operate the generator set withthe engine oil filler cap removed, ashot oil can spray out. Ensure that thelubrication system is not under pres-sure when servicing. Do not work onthe generator set until it cools.

WARNING

Servicing the exhaust system. Hotparts can cause severe injury ordeath. Do not touch hot engine parts.The engine and exhaust systemcomponents become extremely hotduring operation.

NoticeNOTICE

Canadian installations only. Forstandby service connect the output ofthe generator set to a suitably ratedtransfer switch in accordance withCanadian Electrical Code, Part 1.

TP-6809 11/13 9Introduction

Introduction

This manual provides installation instructions for theModel 38RCL, 48RCL, and 60RCL generator sets.Operation manuals are available separately. SeeFigure 1 for an illustration of the 48RCL generator set.

Information in this publication represents data availableat the time of print. Kohler Co. reserves the right tochange this publication and the products representedwithout notice and without any obligation or liabilitywhatsoever.

Read this manual and carefully follow all proceduresand safety precautions to ensure proper equipmentoperation and to avoid bodily injury. Readand follow theSafety Precautions and Instructions section at thebeginning of this manual. Keep this manual with theequipment for future reference.

Figure 1 Model 48RCL Generator Set

List of Related Materials

Figure 2 identifies related literature available for thegenerator sets covered in thismanual. Only trained andqualified personnel should install or service thegenerator set.

Literature Type Part Number

Specification Sheet, 38RCL G4-214



Operation Manual, Generator Set TP-6810

Operation Manual, Engine TP-6101

Service Manual, Generator Set TP-6811

Service Manual, 38RCL EngineMechanical TP-6103

Service Manual, 48/60RCL EngineMechanical TP-6104

Service Manual, Engine ECMDiagnostics TP-6724

Service Manual, 38RCL Alternator TP-6353

Service Manual, 48/60RCL Alternator TP-6783

Parts Catalog, 38RCL Engine TP-6730

Parts Catalog, 48/60RCL Engine TP-6731

Parts Catalog, Generator Set TP-6812

Installation Instructions, Load ControlModule (LCM) TT-1574

Installation Instructions, ProgrammableInterface Module (PIM) TT-1584

Operation Manual, OnCuet Software TP-6796

Operation/Installation Manual, RXT ATS TP-6807

Operation/Installation Manual, RDT ATS TP-6345

Installation Manual, RSB Transfer Switch TP-6486

Operation Manual, RSB Transfer Switch TP-6487

Figure 2 Related Literature

Warranty Registration

Complete the startup and installation checklistssupplied with the startup notification form. Completeand sign the startup notification form and register theunit using the Kohler online Warranty processingSystem.

TP-6809 11/1310 Service Assistance

Service Assistance

For professional advice on generator powerrequirementsandconscientiousservice, pleasecontactyour nearest authorized Kohler distributor/dealer.

D Consult the Yellow Pages under the headingGenerators—Electric.

D Visit the Kohler Power Systems website atKOHLERPower.com.

D Lookat the labels and stickers on yourKohler productor review the appropriate literature or documentsincluded with the product.

D Call toll free in the US and Canada 1-800-544-2444.

D Outside theUSandCanada, call the nearest regionaloffice.

Headquarters Europe, Middle East, Africa(EMEA)Kohler Power Systems Netherlands B.V.Kristallaan 14761 ZC ZevenbergenThe NetherlandsPhone: (31) 168 331630Fax: (31) 168 331631

Asia PacificPower Systems Asia Pacific Regional OfficeSingapore, Republic of SingaporePhone: (65) 6264-6422Fax: (65) 6264-6455

ChinaNorth China Regional Office, BeijingPhone: (86) 10 6518 7950

(86) 10 6518 7951(86) 10 6518 7952

Fax: (86) 10 6518 7955

East China Regional Office, ShanghaiPhone: (86) 21 6288 0500Fax: (86) 21 6288 0550

India, Bangladesh, Sri LankaIndia Regional OfficeBangalore, IndiaPhone: (91) 80 3366208

(91) 80 3366231Fax: (91) 80 3315972

Japan, KoreaNorth Asia Regional OfficeTokyo, JapanPhone: (813) 3440-4515Fax: (813) 3440-2727

Latin AmericaLatin America Regional OfficeLakeland, Florida, USAPhone: (863) 619-7568Fax: (863) 701-7131

TP-6809 11/13 11Section 1 Installation Instructions

Section 1 Installation Instructions

1.1 Introduction

Review this entire section and the Safety Precautionsbefore starting the installation procedure. Thegenerator set specification sheet also contains data thatmay be required during the installation process.

The generator set and accessories must be installed byan authorized Kohler distributor/dealer or authorizedrepresentative. The installation must comply with theNational Electrical Code (NEC) and local codes. ForCanadian installations, refer to the Canadian ElectricalCode (CEC).

Note: These instructions outline one procedure forinstalling the generator set. Local codes mayrequire different procedures.

The generator set must be installed outdoors. Theexhaust systems on enclosed units are designed foroutdoor installation only.

Note: DO NOT install these generator sets inside abuilding.

Note: Install carbon monoxide (CO) detector(s) oneach level of any building adjacent to a generatorset. Locate the detectors to adequately warn thebuilding’s occupants of the presence of carbonmonoxide.

Read and follow the safety precautions in this manualand observe the decals on the equipment. Refer to thediagrams and drawings in Section 4 for dimensions andelectrical connections during the installation procedure.Read the entire installation procedure and obtain theaccessories and tools needed before beginninginstallation. Perform the steps in the order shown.

To install optional accessories, follow the instructionsprovided with each kit.

Hazardous voltage.Backfeed to the utility system cancause property damage, severeinjury, or death.

If the generator set is used forstandby power, install an automatictransfer switch to prevent inadvertentinterconnection of standby andnormal sources of supply.

WARNING

Grounding electrical equipment. Hazardous voltage cancause severe injury or death. Electrocution is possiblewhenever electricity is present. Ensure you comply with allapplicable codes and standards. Electrically ground thegenerator set, transfer switch, and related equipment andelectrical circuits. Turn off the main circuit breakers of allpower sources before servicing the equipment. Never contactelectrical leads or appliances when standing inwater or onwetground because these conditions increase the risk ofelectrocution.

Carbon monoxide.Can cause severe nausea,fainting, or death.

The exhaust system must beleakproof and routinely inspected.

WARNING

Generator set operation. Carbon monoxide can causesevere nausea, fainting, or death. Carbon monoxide is anodorless, colorless, tasteless, nonirritating gas that can causedeath if inhaled for even a short time. Avoid breathing exhaustfumes when working on or near the generator set. Neveroperate the generator set inside a building. Never operate thegenerator set where exhaust gas could seep inside or bedrawn into a potentially occupied building throughwindows, airintake vents, or other openings.

Carbon monoxide detectors. Carbon monoxide cancause severe nausea, fainting, or death. Install carbonmonoxide detectors on each level of any building adjacent tothe generator set. Locate the detectors to adequately warn thebuilding’s occupants of the presence of carbon monoxide.Keep the detectors operational at all times. Periodically testand replace the carbon monoxide detectors according to themanufacturer’s instructions.

TP-6809 11/1312 Section 1 Installation Instructions

Tools Required:

D Multimeter (for measuring voltage and current)D Frequency meter (may be part of multimeter)D Manometer (for measuring fuel pressure)D Torque wrenchD WrenchesD ScrewdriversD Socket wrenches or nut driversD PliersD Safety glasses or gogglesD Drill with bits and hole saw

Installer/Customer-Supplied Items:

D OneBCIgroup24size12-volt batterywithaminimumrating of 630 cold cranking amps (CCA) at 0_F

D Gravel or crushed stoneD Concrete mounting padD Cables and conduitD Fuel supply line with shutoff valve and pipe sealant(provided by fuel supplier)

D Carbon monoxide (CO) detector(s)

Available Accessories:

D BatteryD Battery heaterD Block heaterD Flexible fuel linesD Programmable Interface Module (PIM)See TT-1584 for installation instructions.

D Load Control Module (LCM)See TT-1574 for installation instructions.

D OnCuer Home Generator Management System(requires Ethernet cable connection to your router)

1.2 Lifting Generator Set

Unbalanced weight.Improper lifting can cause severeinjury or death and equipmentdamage.

Do not use lifting eyes.Lift the generator set using lifting barsinserted through the lifting holes onthe skid.

WARNING

The approximate weight of the generator set withenclosure is shown in Figure 1-1. Use equipment that israted for the generator set’s weight to lift the unit intoplace. Lift the enclosure and generator set together asone unit.

Model Weight, kg (lb.)

38RCL 789 (1740)

48RCL 862 (1900)

60RCL 998 (2200)

Figure 1-1 Approximate Weights

Insert lifting bars through the four holes in the mountingskid. The placement of the holes maintains balanceduring lifting.

Follow these general precautions when lifting allgenerator sets and related equipment.

D Install proper size rigging at the skid lifting eyesproviding a direct pull on the skid lifting eye. Makesure the rigging does not work as a pry bar leveragainst the lifting eye.

D DO NOT lift the generator set using the lifting eyesattached to the engine and/or alternator as theselifting eyes can not support the total weight of thegenerator set.

D DONOT attach hoisting equipment to the enclosure.Insert lifting bars through the four holes in themounting skid.

D Always protect cables, chains, and straps from sharpedges.

D Use a spreader bar to prevent lifting cables fromcontacting the enclosure.


D Lifting should only be conducted by those trained andexperienced in lifting and rigging to achieve a safeand effective lift. Consideration needs to be given to,but not necessarily limited to the following items:

d Weight and center of gravity of the equipmentbeing lifted

d Weight and center of gravity of the lifting device

d Boom angles

d Selection of rated rigging

d Stability of lifting foundation

d Wind and weather conditions

d Local or regional codes that may require or restricttypes of rigging.

The distributor/lifting contractor should choose one ofthe followingmethods to lift the generator set dependingupon the location circumstancesand the generator set’sweight and size.

Single Spreader Bar and Skid Lifting Bar Method

Refer to Figure 1-3.

Double Spreader Bar and Skid Lifting Bar Method

Refer to Figure 1-4.

1. Lifting holes

1

ADV--8494

1

Figure 1-2 Typical Enclosure with Lifting Holes

TP-5700-2/L10

Figure 1-3 Single Spreader Bar and Skid Lifting BarMethod (enclosure not shown)

TP-5700-2/L11

Figure 1-4 Double Spreader Bar and Skid LiftingBar Method (enclosure not shown)


1.3 Location and Mounting

1.3.1 Location Factors

Themanufacturer recommendsmounting thegeneratorset on concrete at ground level. For above-groundinstallations, including roof installations, weightconsiderations are especially important. The buildingengineer must determine whether the structure cansupport the weight of the generator set.

The location of the generator set must:

D Support the weight of the generator set and relatedequipment suchasbatteries, radiators, andmountingpad(s). Keep in mind that the mounting pad weightmay exceed the weight of the generator set.

D Meet applicable fire rating codes and standards.

D Minimize the risk that people will come into contactwith hot generator set surfaces.

D Position the generator set over a noncombustiblesurface. DONOT allow accumulation of combustiblematerials under or around the generator set.

D Permit vibration isolation to reducenoise andpreventdamage.

D Not be subject to flooding.

D Allow safe expulsion of exhaust.

D Provide clearance for cooling air flow and access forservice. See Figure 1-5 and the dimension drawingsinSection 4 for required clearances fromobstructionsand combustible materials.

D Minimize the risk of public or unauthorized access.

NoticeDO NOT locate the generator set near patios,decks, play areas, or animal shelters. Keep itemssuch as lawn furniture, toys, sports equipment,and all combustible materials away from thegenerator set exhaust outlet.

Remind family members, children, and visitors touse caution near the generator set. Generatorsets connected to automatic transfer switchesstart automatically during exercise periods andpower outages. Some generator set componentsbecome hot when the generator set is running andremain hot for a time after the generator set shutsdown.

GM86793

SERVICE SIDE

Figure 1-5 Air Intake and Exhaust

1.3.2 Mounting Surface

Install the generator set on a single, level concretemounting pad. Thismethod providesmaximumstabilityand ensures correct cooling air flow through thegenerator set. The recommended mounting paddimensions are shown in the dimension drawings inSection 4.

Refer to the generator set dimension drawings forconduit and fuel-line placement. The drawings givedimensions for electrical and fuel connection rough-insand stub-ups.


1.3.3 Vibration Isolation

The generator set is equipped with neoprene vibrationisolators. Connections between the generator set or itsmounting base and any conduits or fuel lines mustinclude flexible sections to prevent breakage and toisolate vibration.

1.3.4 Prepare Site

Choose a location that is at least 0.9 m (3 ft.) from anybuilding or structure and near the incoming gas service.Allow a minimum of 2.4 m (8 ft.) clearance beyond theexhaust endof thegenerator set. Plan the installationsothat the exhaust outlets of the generator set are notdirected toward the building or any openings whereexhaust gas could be drawn into the building.

Install carbon monoxide detectors on each level of anybuilding adjacent to the generator set. Locate thedetectors toadequatelywarn thebuilding’soccupantsofthe presence of carbon monoxide.

1. Obtain a building permit and contact your localutility companies to mark the locations ofunderground pipes and cables.

2. Prepare an area for mounting the generator set.

a. Clear all combustible materials, includingplants and shrubs, buildingmaterials, and lawn

furniture, from an area at least 2.4 m (8 ft.)beyond the exhaust outlets of the generatorset.

b. Spread a 76 mm (3 in.) thick layer of gravel tosupport the concrete mounting pad. For themounting pad dimensions, see the generatorset dimension drawing in Section 4.

c. Lay a 100 mm (4 in.) thick concrete pad on thegravel layer. Include mounting bolts and stub-ups for the fuel supply and electrical conduit.See the dimension drawing in Section 4 for themounting bolt and stub-up locations.

1.3.5 Mount the Generator Set

1. Place the generator set on the concrete mountingpad. Secure the generator set with mounting boltsanchored in the concrete pad.

2. Remove the shipping bracket, which is attached tothe skid under the engine and labeled with a hangtag.

3. Remove the enclosure doors and alternator-endpanel to gain access to the junction box and othergenerator set components during installation.Remove the covers to access the AC and DCconnection terminal blocks.


1.4 Electrical System

Before installing the generator set, provide for electricalconnections through conduit to the transfer switch andother accessories for thegenerator set. RouteDC leadsin separate conduit from AC conductors. Carefullyinstall the selected generator set accessories. Routewiring to the generator set through flexible connections.Complywithall applicable codeswhen installingawiringsystem.

See the dimension drawings in Section 4 for therecommended stub-up location.

AC circuit protection. All AC circuits must includecircuit breaker or fuse protection. The circuit breakermust be rated for a maximum of 125% of the ratedgenerator set output current. The circuit breaker mustopen all ungrounded connectors.

The generator set is equipped with a factory-installedcircuit breaker.

1.4.1 Electrical Connections

Several electrical connections must be made betweenthe generator set and other components of the systemfor proper operation. Most field-installed accessory kitsinclude installation instructions. Complywith applicablenational and local codeswhen installingawiringsystem.

For Canadian installations, refer to the CanadianElectrical Code (CEC).

For customer-supplied wiring, select the wiretemperature rating in Figure 1-6 based upon thefollowing criteria:

D Select row 1, 2, 3, or 4 if the circuit rating is110 amperes or less or requires #1 AWG (42.4 mm2)or smaller conductors.

D Select row 3 or 4 if the circuit rating is greater than110 amperes or requires #1 AWG (42.4 mm2) orlarger conductors.

Row Temp. Rating Copper (Cu) Only Cu/Aluminum (Al) Combinations Al Only

1 60_C (140_F)or

75_C (167_F)

Use No. * AWG, 60_C wire oruse No. * AWG, 75_C wire

Use 60_C wire, either No. * AWG Cu, or No. *AWG Al or use 75_C wire, either No. * AWGCu or No. * AWG Al

Use 60_C wire, No. * AWG oruse 75_C wire, No. * AWG

2 60_C (140_F) Use No. * AWG, 60_C wire Use 60_C wire, either No. * AWG Cu or No. *AWG Al

Use 60_C wire, No. * AWG

3 75_C (167_F) Use No. *[ AWG, 75_C wire Use 75_C wire, either No. *[ AWG Cu or No. *[AWG Al

Use 75_C wire, No.*[ AWG

4 90_C (194_F) Use No. *[ AWG, 90_C wire Use 90_C wire, either No. *[ AWG Cu or No. *[AWG Al

Use 90_C wire, No.*[ AWG

* The wire size for 60_C (140_F) wire is not required to be included in the marking. If included, the wire size is based on ampacities for thewire given in Table 310-16 of the National Electrical Coder, in ANSI/NFPA 70, and on 115% of the maximum current that the circuit carriesunder rated conditions. The National Electrical Coder is a registered trademark of the National Fire Protection Association, Inc.

[ Use the larger of the following conductors: the same size conductor as that used for the temperature test or one selected using theguidelines in the preceding footnote.

Figure 1-6 Terminal Markings for Various Temperature Ratings and Conductors


1.4.2 Terminal Connector Torque

Use the torque values shown in Figure 1-7 or Figure 1-8for terminal connectors. Refer to UL-486A, UL-486B,and UL-486E for information on terminal connectors foraluminum and/or copper conductors. Comply withapplicable national and local codes when installing awiring system.

Note: If a connector has a clamp screw such as aslotted, hexagonal head screw with more thanonemeans of tightening, test the connector usingboth applicable torque values provided inFigure 1-8.

Socket Size AcrossFlats, mm (in.)

Tightening Torque,Nm (in. lb.)

3.2 (1/8) 5.1 (45)

4.0 (5/32) 11.4 (100)

4.8 (3/16) 13.8 (120)

5.6 (7/32) 17.0 (150)

6.4 (1/4) 22.6 (200)

7.9 (5/16) 31.1 (275)

9.5 (3/8) 42.4 (375)

12.7 (1/2) 56.5 (500)

14.3 (9/16) 67.8 (600)

Note: For values of slot width or length not corresponding tothose specified, select the largest torque valueassociated with the conductor size. Slot width is thenominal design value. Slot length is to be measured atthe bottom of the slot.

Figure 1-7 Tightening Torque for Pressure WireConnectors with Internal-DriveSocket-Head Screws

Wire Size for UnitConnection

Tightening Torque, Nm (in. lb.)

Slot Head 4.7 mm (No. 10) or Larger*Hexagonal Head—External

Drive Socket Wrench

AWG, kcmil (mm2)Slot Width <1.2 mm (0.047 in.)Slot Length <6.4 mm (0.25 in.)

Slot Width >1.2 mm (0.047 in.)Slot Length >6.4 mm (0.25 in.)

Split-BoltConnectors

OtherConnections

18--10 (0.82--5.3) 2.3 (20) 4.0 (35) 9.0 (80) 8.5 (75)

8 (8.4) 2.8 (25) 4.5 (40) 9.0 (80) 8.5 (75)

6--4 (13.3--21.2) 4.0 (35) 5.1 (45) 18.6 (165) 12.4 (110)

3 (26.7) 4.0 (35) 5.6 (50) 31.1 (275) 16.9 (150)

2 (33.6) 4.5 (40) 5.6 (50) 31.1 (275) 16.9 (150)

1 (42.4) — 5.6 (50) 31.1 (275) 16.9 (150)

1/0--2/0 (53.5--67.4) — 5.6 (50) 43.5 (385) 20.3 (180)

3/0--4/0 (85.0--107.2) — 5.6 (50) 56.5 (500) 28.2 (250)

250--350 (127--177) — 5.6 (50) 73.4 (650) 36.7 (325)

400 (203) — 5.6 (50) 93.2 (825) 36.7 (325)

500 (253) — 5.6 (50) 93.2 (825) 42.4 (375)

600--750 (304--380) — 5.6 (50) 113.0 (1000) 42.4 (375)

800--1000 (406--508) — 5.6 (50) 124.3 (1100) 56.5 (500)

1250--2000 (635--1016) — — 124.3 (1100) 67.8 (600)

* For values of slot width or length not corresponding to those specified, select the largest torque value associated with the conductor size.Slot width is the nominal design value. Slot length is to be measured at the bottom of the slot.

Note: If a connector has a clamp screw such as a slotted, hexagonal head screw with more than one means of tightening, test theconnector using both applicable torque values.

Figure 1-8 Tightening Torque for Screw-Type Pressure Wire Connectors


1.4.3 Ground and Neutral Connections

Ground the generator set. The grounding methodmustcomply with NEC and local codes. Connect thegrounding strap to the generator set ground lug,terminal GRD inside the junction box or on TB2. SeeFigure 1-10. Connect the ground to the GND terminalson terminal block TB2.

Various regulationsandsite configurations including theNational Electrical Code (NEC), local codes, and thetype of transfer switch used in the application determinethe grounding of the neutral at the alternator. NEC2002Section 250.20 is one example that has a very goodexplanation of the neutral grounding requirements forgenerator sets.

Generator sets are shipped with the generator setneutral attached to the alternator in the junction box. Atinstallation, the neutral can be grounded at thegenerator set or lifted from the ground stud and isolatedif the installation requires an ungrounded neutralconnection at the alternator. The generator set willoperate properly with the neutral either bonded toground or isolated from ground at the alternator.

1.4.4 Battery Chargers

An engine-driven, battery-charging alternator chargesthe battery whenever the generator set operates.Engine-driven systems can quickly restore the chargeused in a normal cranking cycle.

When the engine is not operating, a very low charge ratefromanAC-poweredbattery charger is usually sufficientto maintain a full charge on the batteries. The RDC2controller contains a built-in battery charger to maintainthe generator set’s engine starting battery. Be sure toprovide AC power for the integral battery charger asinstructed in Section 1.4.5.

1.4.5 Power Supply

Powermust be supplied to the generator set location forthe battery charger and optional accessories. Thepower source must comply with both state and localcodes. The power to the accessoriesmust be availableat all times, i.e. the circuit must be powered by the utilitysource and backed up by the generator set.

Connect power to the leads in the utility powerconnection area shown in Figure 1-10. See the wiringdiagrams in Section 4 for connection details. SeeFigure 1-9 for the power requirements for the batterycharger and accessories.

Equipment

Power Requirement

Watts Amps Volts

Battery charger (standard,integral to RDC2 controller) 120 1 120

Block heater (optional)1500

12.5 120

6.3 240

Battery heater (optional) 80 0.7 120

Figure 1-9 Power Requirements


1.4.6 Connect AC and DC Wiring

Note: Have a licensed electrician make the followingelectrical connections. All connections mustcomply with state and local codes.

Size the wire according to the length of run and 115%ofthe circuit current (amperage) based on 75_C wirerating or less as directed by the National ElectricalCoder (NEC) in ANSI/NFPA 70. See Section 1.4.1 foradditional information about wire selection.

The generator set is equipped with a field-connectionterminal block located in the access area below thejunction box. Leads have been factory-installed fromthe junction box to the terminal block for easy fieldwiring.

See Figure 1-10. Make all AC and DC customerconnections inside the customer connection box. Donot remove the end panel or make connections insidethe junction box. Refer to the wiring diagrams inSection 4.

1. Access panel (remove to access connections)2. 120VAC connection leads and ground screw3. Installer to punch access openings4. Low voltage connection terminal block5. Ethernet cable connection for OnCue6. Ground (GRD) lug7. Load lead access opening8. Load lead connections to line circuit breaker9. Neutral lug

GM785271

694

2

3

Connection detailsAccess panel removed.

8 7 5

Figure 1-10 Generator Set Connections


Generator Set Connections

Use separate conduit for the power cables and the lowvoltage communication or engine start leads. Localcodesand the length of run aswell as the transfer switchwire size requirements will determine the wire sizeneeded for the AC leads.

Note: Some codes require the use of a disconnectswitch. Check the code requirements for yourlocation and install a disconnect switch, ifrequired.

1. Route the load leads into the junction box throughthe access opening in the bottom of the box.Connect the load leads from the line circuit breakerin the generator set junction box to the transferswitch emergency power connection points. SeeFigure 1-10 and refer to transfer switch installationmanual for ATS connection instructions.

2. Connect the neutral (L0) and ground (GRD) leadsfrom the ATS and the main panel to thecorresponding lugs in the connection box. SeeSection 1.3.5 for grounding information.

3. Cut or punchopenings in the side of the connectionbox for the 120 VAC power supply leads and thelow voltage connections. See Figure 1-10. Useseparate conduit for the power leads and the lowvoltage leads.

4. Connect utility power for the controller’s batterycharger. Connect to a circuit that is supplied by theutility source and backed up by the generator. SeeSection 1.4.5 for more information about the utilitypower requirement.

5. For transfer switch communication and/or enginestart connection, see Section 1.4.7.

6. For connection of the optional programmableinterfacemodule (PIM), and/or load controlmodule(LCM), see Section 1.4.9.

7. Install an AC receptacle for the optional blockheater, if equipped. Power to this receptacle mustbe available when the generator set is not running.

8. If theOnCuerGeneratorManagement Systemwillbe used with the generator set, run category 5Enetwork cable from the generator set to thecustomer’s router or modem.

Note: Installation of the network cable at the timeof generator set installation is highlyrecommended. Installing theEthernet cablenowwillmake connectionmucheasier if youchoose to add OnCue later.

a. Route the network cable with other low-voltagesignal wiring (for example, the RBUScommunication leads or engine start leads tothe transfer switch), in separate conduit fromtheAC load leads. If thenetwork cable is longerthan 100 meters (328 ft.), use a repeater orswitch.

b. Use an RJ45 inline coupler to connect theEthernet cable to the cable in the customerconnection box. The inline coupler is includedwith the OnCue kit.

1.4.7 Automatic Transfer SwitchConnection

A typical standby system has an automatic transferswitch connected to the generator set output toautomatically transfer the electrical load to thegenerator set if the normal source fails. The normalpower source is typically utility power. When normalpower returns, the switch transfers the load back to thenormal power source and then signals the generator setto stop.

Connect the ATS or remote start/stop switch. Connectthe load leads from the generator set to the Emergencysource lugs on the ATS. Connect the RBUS or enginestart connections as described below. Routelow-voltage communication leads through separateconduit from the AC power and load leads. Allconnectionsmust complywith applicable state and localcodes.


Kohler Model RXT Automatic Transfer Switch

The RDC2 controller is designed to control the KohlerModel RXT transfer switch as well as the generator set.Follow the installation instructions to connect thetransfer switch interface board to the appropriateterminals on the generator set. The RDC2 controlleruses a Kohler-propietary communication protocol tocommunicate with the transfer switch.

Whenconnected to aKohlerModelRXT transfer switch,the RDC2 controller provides the following features:

D Monitors and displays utility voltage and frequency.

D Schedule loadedexercises from theRDC2generatorset controller.

D Set the ATS system voltage and frequency.

D Allows calibration of the utility voltage and frequencyat the generator set controller.

D Allows adjustment of transfer switch transfer timedelays from the generator set controller.

RBUS communication connections for a KohlerrModel RXT transfer switch

OneModel RXT transfer switch can be connected to thegenerator set. See Figure 1-11. Use shielded,twisted-pair cable to connect P10-1 through P10-4 onthe transfer switch interfacemodule to the generator setterminal block connections A, B, PWR, and COM. SeeSection 1.4.8 for communication cablerecommendations and maximum cable length.

Note: Connections 3 and 4 on the generator set are notused with the Model RXT transfer switch.

1. Customer connection terminal block. See Figure 1-10 for location. Check the decal on the generator set for terminal blockconnections.

2. Connect one end of each cable shield to GROUND at the generator set.3. See Figure 1-13 for cable specifications.4. Leave the end of each cable shield disconnected at the last device. If accessory modules (PIM or LCM) are connected, see

Section 1.4.9.

Interface Board on theModel RXT Transfer Switch

Note: Generator set terminal block connections 3 and 4 are NOT USED with the Model RXT ATS.

Generator Set

COM

PWR

B

A

RXT

COM

PWR

B

A

3

GND

RBUS

12VDC

4

4

21

Figure 1-11 Model RXT Transfer Switch Communication Connection to Generator Set Terminal Block


Engine start connection for other transferswitches or a remote start/stop switch

Note: Do not use the Kohlerr Model RRT transferswitch with Model RCL generator sets.

Other Kohler transfer switches, inckuding Model RDT,RSB, and Model K (MPACt) transfer switches can beused with the Kohler generator sets covered in thisdocument. These transfer switches contain separateATS controls that do not communicate with the RDC2controller.

These transfer switches use a set of contacts to signalthe engine/generator to start. When the normal sourcefails and the generator set is in AUTOmode, the transferswitch contacts close to signal the generator set to startand run. After the normal source returns, the contactsopen to signal the generator set to stop.

The engine start terminals are usually located near thetransfer switch contactor with an engine start decalidentifying the terminals. Use the transfer switch wiringdiagrams to identify the engine start terminals prior tomaking connections.

Connect the transfer switch engine-start contacts or aremote manual engine-start switch to the engine startterminals (3 and 4) on the generator set. Size the wireaccording to the transfer switch connection and thelength of run. Use separate conduit for the DCengine-start leads and theACgenerator set load cablesand battery charger leads.

See Figure 1-12. Connect the engine start leads fromthe transfer switch or remote start switch to terminals 3and4on the terminal block. Route theenginestart leadsthrough separate conduit from the AC power and loadleads.

Close the remote start contacts to start and run thegenerator set. Open thecontacts to signal thegeneratorset to stop. The generator set controller must be inAUTO mode for remote start/stop.

tp6809

1. Customer connection terminal block. See Figure 1-10 for location. Check the decal on the generator set for terminal block connections.

2. Engine start leads 3 and 4. See the ATS manual for cable size specifications.

Generator Set

ATSModels RDTor RSB

2

1

RBUS

12VDC

Figure 1-12 Engine Start Connections with Transfer Switch Models RDT or RSB


1.4.8 Communication CableSpecifications

RBUS Connections A and B

For the RBUS communication connections A and B tothe Model RXT transfer switch, optional PIM, and/oroptional LCM or load shed kit, use 20 AWG shielded,twisted-pair communication cable. Belden #9402(two-pair) or Belden #8762 (single-pair) or equivalentcable is recommended.

For outdoor installations, including those with buriedcables and/or conduit, use outdoor-rated Belden#1075A or equivalent 20 AWG shielded, twisted-paircommunication cable.

PWR and COM Connections

For the PWR and COM connections from the generatorset to the RXT, PIM, and/or LCM, use the second pair inthe two-pair communication cable for short runs, or use12--14 AWG cable for longer runs as shown inFigure 1-13.

The maximum cable length depends on the number ofoptional modules connected. Amodule can be aModelRXT transfer switch, a load control module (LCM) orload shed kit, or a programmable interface module(PIM). See Figure 1-13 for the maximum cable lengthsfor 1, 2, or 3 modules per cable run. Note the shieldconnections shown in Figure 1-14.

Cable Size for PWR and COM Connections

Indoor orOutdoor

Installation

Maximum length per run, meters (ft.)

Number of Modules (ATS, PIM, and LCM) per Run

1 Module 2 Modules 3 Modules

20 AWG Belden #9402 or equivalent, two-pair Indoor 61 (200) 31 (100) 21 (67)

20 AWG Belden #1075A or equivalent, two-pair Outdoor 61 (200) 31 (100) 21 (67)

14 AWG * — 152 (500) 152 (500) 122 (400)

12 AWG * — 152 (500) 152 (500) 152 (500)

* Use 12 or 14 AWG cable for PWR and COM connections only. For RBUS connections A and B, always use shielded, twisted paircommunication cable.

Figure 1-13 Total Cable Lengths with Accessory Modules


1.4.9 System Connections withAccessory Modules

See Figure 1-14 through Figure 1-18 for connectionoptions with up to three accessorymodules. Accessorymodules can include one Model RXT transfer switch,

one programmable interface module (PIM), and/or oneload control module (LCM).

See Section 1.4.8 for cable size and lengthspecifications.

PIM

LCM

Generator Set

COM

COM

PWR

COM

PWR

PWR

B

A

B

A

B

A

COM

PWR

B

A

RXT3

COM

PWR

B

A

COM

PWR

B

A

4

1. Customer connection terminal block. See Figure 1-10 for location. Check the decal on the generator set for terminal block connections.2. Connect one end of each cable shield to GROUND at the generator set.3. See Figure 1-13 for cable specifications, including maximum total cable length per run (1 run shown).4. Connect shields together as shown.5. Leave the end of each cable shield disconnected at the last device. If accessory modules (PIM or LCM) are connected, see Section

1.4.9.

GND

RBUS

12VDC

2

5

1

Figure 1-14 Accessory Module Communication Connection Details


RXT3

COM

PWR

B

A

4

PIM

LCM

Generator Set

COM

COM

PWR

COM

PWR

PWR

B

A

B

A

B

A

COM

PWR

B

A

COM

PWR

B

A

1. Customer connection terminal block. See Figure 1-10 for location. Check the decal on the generator set for terminal block connections.

2. Connect one end of each cable shield to GROUND at the generator set.3. Communication cable Belden #9402 or equivalent 20 AWG shielded, twisted-pair cable (one pair)4. Connect shields together as shown.5. 12 AWG or 14 AWG leads for PWR and COM6. Leave one end of each cable shield disconnected at the last device.

GND

A

B

COM

PWR

3

4

RBUS

12 VDC

1

2

6

5

Note: See Section 1.4.8, Cable Specifications.

Figure 1-15 Accessory Module Connections with 12--14 AWG Power Leads (one cable run with three modulesshown)


tp6809

PIM

LCM

RXT ATSGenerator Set

Notes:

D See Figure 1-10 for terminal block location on generator set. Checkthe decal on the generator set for terminal block connections.

D See Figure 1-13 for maximum total cable length per run (3 runs with1 module each shown).

D See Figure 1-14 for communication connection detail.

D Use splices or wire nuts to collect multiple leads for connection to thegenerator set terminal block. See Figure 1-17.

CustomerConnection

Terminal Block

Figure 1-16 Accessory Module Connections (three cable runs with one module each)

Note: See Figure 1-13 for cable specifications.

1. Customer connection terminal block. See Figure 1-10 for location. Check the decal on the generator set for terminal block connections.2. Splice3. Connect all of the shield leads on this end to GROUND at the generator set.

2

tp6809

Generator SetCOM

PWR

BA

3

COM

PWR

BA

9402 CABLE

9402 CABLE

RBUS

12VDC3

1

Figure 1-17 Multiple Connections to the Generator Set


tp6809

PIM

LCM

RXT ATSGenerator SetTB1

Notes:

D See Figure 1-10 for terminal block location on generator set. Checkthe decal on the generator set for terminal block connections.

D See Figure 1-13 for maximum total cable length with 12 or 14 AWGwire.

D See Figure 1-14 for communication connection (A and B, PWR andCOM) details. Connect the cable shield to ground at the generator set.

Figure 1-18 Accessory Module Connections (two cable runs with one and two modules shown)

1.4.10 Other Accessories

Install and connect optional accessories. Follow theinstallation instructionsprovidedwith theaccessorykits.

See Section 2 for information about availableaccessories.


1.5 Engine Starting Battery

Sulfuric acid in batteries.Can cause severe injury or death.

Wear protective goggles andclothing. Battery acid may causeblindness and burn skin.

WARNING

Explosion.Can cause severe injury or death.Relays in the battery chargercause arcs or sparks.

Locate the battery in a well-ventilatedarea. Isolate the battery charger fromexplosive fumes.

WARNING

Battery gases. Explosion can cause severe injury ordeath. Battery gases can cause an explosion. Do not smokeor permit flames or sparks to occur near a battery at any time,particularly when it is charging. Do not dispose of a battery in afire. To prevent burns and sparks that could cause anexplosion, avoid touching the battery terminals with tools orother metal objects. Remove all jewelry before servicing theequipment. Discharge static electricity from your body beforetouching batteries by first touching a grounded metal surfaceaway from the battery. To avoid sparks, do not disturb thebattery charger connections while the battery is charging.Always turn the battery charger off before disconnecting thebattery connections. Ventilate the compartments containingbatteries to prevent accumulation of explosive gases.

Battery short circuits. Explosion can cause severe injuryor death. Short circuits can cause bodily injury and/orequipment damage. Disconnect the battery before generatorset installation or maintenance. Remove all jewelry beforeservicing the equipment. Use tools with insulated handles.Remove the negative (--) lead first when disconnecting thebattery. Reconnect the negative (--) lead last whenreconnecting the battery. Never connect the negative (--)battery cable to the positive (+) connection terminal of thestarter solenoid. Do not test the battery condition by shortingthe terminals together.

Battery electrolyte is a diluted sulfuric acid. Battery acidcan cause severe injury or death. Battery acid can causeblindness and burn skin. Always wear splashproof safetygoggles, rubber gloves, and boots when servicing the battery.Do not open a sealed battery or mutilate the battery case. Ifbattery acid splashes in the eyes or on the skin, immediatelyflush the affected area for 15 minutes with large quantities ofclean water. Seek immediate medical aid in the case of eyecontact. Never add acid to a battery after placing the battery inservice, as this may result in hazardous spattering of batteryacid.

Battery acid cleanup. Battery acid can cause severeinjury or death. Battery acid is electrically conductive andcorrosive. Add 500 g (1 lb.) of bicarbonate of soda (bakingsoda) to a container with 4 L (1 gal.) of water and mix theneutralizing solution. Pour the neutralizing solution on thespilled battery acid and continue to add the neutralizingsolution to the spilled battery acid until all evidence of achemical reaction (foaming) has ceased. Flush the resultingliquid with water and dry the area.

Use a BCI group 24 size 12-volt battery with a minimumrating of 630 cold cranking amps (CCA) at 0_F.

1. Ensure that the starting battery is fully chargedbefore placing the battery in service.

2. Clean the battery posts and/or adapters ifnecessary.

3. Install battery post adapters, if needed.

4. See the dimension drawing in Section 4 for thebattery rack location. Place the battery on thebattery rack on the skid.

5. Connect the red battery cable to the positive (+)battery terminal.

6. Connect the black battery cable to the negative (--)battery terminal.

7. Place the boots over the battery terminals.

When power is applied to the RDC2 controller (that is,when the battery is connected), you will be prompted toset the date and time, and then to set the exerciser. SeeSection 1.9 and the generator set operation manual forinstructions.

If the battery is disconnected for service or replacement,the exercise settings on the RDC2/DC2 controller arelost. Set theexerciser after installingandconnecting thebattery. See Section 1.9, Set Exerciser.


1.6 Fuel System

Explosive fuel vapors.Can cause severe injury or death.

Use extreme care when handling,storing, and using fuels.

WARNING

The fuel system. Explosive fuel vapors can cause severeinjury or death. Vaporized fuels are highly explosive. Useextreme care when handling and storing fuels. Store fuels in awell-ventilated area away from spark-producing equipmentand out of the reach of children. Never add fuel to the tankwhile the engine is running because spilled fuel may ignite oncontact with hot parts or from sparks. Do not smoke or permitflames or sparks to occur near sources of spilled fuel or fuelvapors. Keep the fuel lines and connections tight and in goodcondition. Donot replace flexible fuel lineswith rigid lines. Useflexible sections to avoid fuel line breakage caused byvibration. Do not operate the generator set in the presence offuel leaks, fuel accumulation, or sparks. Repair fuel systemsbefore resuming generator set operation.

Gas fuel leaks. Explosive fuel vapors can cause severeinjury or death. Fuel leakage can cause anexplosion. Checkthe LP vapor gas or natural gas fuel system for leakage byusing a soap and water solution with the fuel system testpressurized to 6--8 ounces per square inch (10--14 incheswater column). Do not use a soap solution containing eitherammonia or chlorine because both prevent bubble formation.A successful test depends on the ability of the solution tobubble.

Gas fuel systems operate on either LP vapor or naturalgas. Refer to the generator set specification sheet andSection 1.6.3 for more detailed information on fuelrequirements.

Note: The fuel system installationmust comply with theNational Electrical Coder (NEC) and applicablelocal codes.

1.6.1 Fuel Lines

Gas lines. Never use fuel piping to ground electricalequipment. The gas supplier is responsible forinstallation, repair, and alteration to gas piping.

UseSchedule 40 black-iron pipe for gas piping. Coppertubingmaybeused if the fuel doesnot contain hydrogensulfide or other ingredients that react chemically withcopper.

Line size. Size piping according to the requirements ofthe equipment. The type of fuel, the distance it musttravel from gas meter/tank to fuel shutoff solenoid, andthe amount consumed by the engine must beconsidered when determining fuel line pipe size.

In addition to actual fuel consumption, consider thefollowing pressure loss factors:

D Pipe lengthD Other appliances on the same fuel supplyD Number of fittings

Measure the pipe length from the primary gas pressureregulator to the pipe connection on the generator setfuel inlet. Add 2.4 m (8 ft.) to the measured length foreach 90 degree elbow. Use the pipe size indicated inFigure 1-19 for the total length of pipe.

Figure 1-19 is based on gas pressures of 3.4 kPa(0.5 psi, 13.8 in. water column) or less and a pressuredrop of 0.12 kPa (0.018 psi, 0.5 in. water column) with a0.60 specific gravity and with a normal amount ofrestriction from fittings. The LPG flow has beencorrected for specific gravity to determine the pipe sizesshown in the table.

Flexible connections. Rigid mount the piping butprotect it from vibration. Use flexible connectionsspanning a minimum of 152 mm (6 in.) between thestationary piping and the engine fuel inlet connection.

Model Fuel

Maximum Fuel FlowRate@ Full Load

Nominal Iron Pipe Size, in.

Pipe Length, m (ft)

cfhLPG cfhcorrected

3.0(10)

6.1(20)

12.2(40)

18.3(60)

24.4(80)

30.5(100)

45.7(150)

61.0(200)

38RCLLPG 224 354 3/4 1 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2

NG 545 NA 1 1 1/4 1 1/4 1 1/2 1 1/2 1 1/2 2 2

48RCLLPG 283 447 1 1 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2 2

NG 699 NA 1 1/4 1 1/4 1 1/2 1 1/2 2 2 2 2 1/2

60RCLLPG 330 521 1 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2 2 2

NG 790 NA 1 1/4 1 1/4 1 1/2 1 1/2 2 2 2 2

Figure 1-19 Fuel Pipe Sizes


1.6.2 Gas Regulators

Gas regulators reduce high incoming fuel pressures tolower levels acceptable for engines. See the generatorset specification sheet for fuel supply pressurerequirements.

Primary gas regulator. The primary regulator reducesthe high pressure from a tank or transmission line to thelower pressure required by the secondary regulator onthe engine. The fuel supplier provides the primaryregulator. The fuel supplier is also responsible forproviding sufficient gas pressure to operate the primaryregulator.

Secondary gas regulator. The secondary regulator isfactory-installed on the generator set engine andcontrols the inlet pressure to the engine. The modelscovered by this manual use an electronic pressureregulator. See Section 1.6.4.

Note: The Integrated Electronic Pressure Regulator(IEPR) and air/fuel mixer are specially calibratedemission-control devices. Donot adjust the IEPRor the air/fuel mixer.

1.6.3 Install and Connect Fuel Supply

Note: Have the fuel piping and regulator installed by thefuel supplier. The fuel supply installation mustcomply with NEC and local codes.

1. See thegenerator set specsheet for the fuel supplyrequirements. Add up the fuel requirements for thegenerator set plus all other gas-fired equipmentfueled by the same supply.

2. Check that the primary regulator and gas meterhave sufficient capacity for the fuel requirementsfor the generator set plus all other gas-firedequipment. Have the fuel supplier install a largergas meter, if necessary.

3. Determine the fuel pipe size as described inSection 1.6.1.

4. Have your fuel supplier install amanual fuel shutoffvalve and rigid gas piping. Bring the pipe to within254 mm (10 in.) of the generator set fuel inletlocation.

5. Remove the enclosure door on the service side ofthe unit.

6. Connect the fuel supply:

a. Apply pipe sealant that is approved for fuelconnections to the threaded fuel connections.

b. Use a section of flexible fuel line to connect thefuel supply to the 1 in. NPT fuel inlet connectionon the generator set. See Figure 1-20 or thedimension drawing in Section 4 for the fuel inletconnection location.

c. Open the manual fuel valves and leak test allfuel connections using soapy water. If a leak isdetected, close the fuel valves, disconnect thelines at the location of the leak, clean thefittings, and apply fresh pipe sealant.Reconnect the lines and recheck for leaks.

7. Verify that the fuel system is set up for the fuel beingused (natural gas or LP). See Section 1.6.4.

Note: After the system installation is complete,check for fuel leaks with the generator setrunning.

1

GM785231. Fuel solenoid valves (2)2. Fuel inlet connection

2

Figure 1-20 Fuel Supply Connection Location(generator set enclosure not shown)


1.6.4 Fuel Conversion Procedures

Note: The Integrated Electronic Pressure Regulator(IEPR) and air/fuel mixer are specially calibratedemission-control devices. Donot adjust the IEPRor the air/fuel mixer.

Check the connections to the fuel solenoid valve toverify that the fuel system is set up for the typeof fuel thatwill be used. See Figure 1-20 for the location of the fuelsolenoid valve.

To change the fuel type, change the connection to thefuel solenoid valve as described below and shown inFigure 1-21.

LP Connections:

D Disconnect lead 73A from the fuel valve.

D Connect lead 73B to the fuel valve.

D Connect lead 65 to lead N3 (ground).

Natural Gas Connections:

D Disconnect lead 65 from N3.

D Disconnect lead 73B from the fuel valve.

D Connect lead 73A to the fuel valve.

GM79871

TO ECM

FOR LP REMOVE 73A LEAD FROM FV1AND PLUG IN 73B LEAD

FOR LP FUELCONNECT 65 AND N3

NATURAL GAS CONFIGURATION SHOWN

Figure 1-21 Fuel Type Connections

Converting the fuel will change the generator set rating.See thegenerator set specification sheet for ratingswithnatural gas and LP. Order a new nameplate with theupdated rating and fuel information from an authorizeddistributor/dealer, if necessary. Provide the followinginformation from the original nameplate:

D Model Number D kVAD Spec Number D AmpsD Serial Number D VoltsD Fuel (original and new) D HzD kW


1.7 Cooling System

The generator set is equipped with a unit-mountedradiator common cooling system. Add cooloant beforestarting the generator set or energizing the block heater.

The system’s major components include two electricfans, a circulating water pump, a radiator, and athermostat. The pump circulates water through theengine until it reaches operating temperature. Then theengine thermostat opens, allowing water circulationthrough the radiator. The thermostat restricts water flowas necessary to prevent overcooling. The fans blow airthrough the radiator across the cooling surface.

Follow the instructions below to fill the cooling system.

1. Close the radiator’s coolant drain valve and tightenthe hose clamps.

Note: Do not add coolant to a hot engine. Addingcoolant to a hot engine can cause thecylinder block or cylinder head to crack.Wait until the engine has cooled.

2. Fill the radiator with the recommended coolantmixture of 50% ethylene glycol-based long-lifecoolant and 50% clean, softened water to inhibitrust/corrosion and prevent freezing. SeeFigure 1-22 for coolant capacity and Figure 1-23for coolant fill location. Do not replace the pressurecap at this time.

Note: A coolant solution of 50% ethylene glycolprovides freezing protection to --37C(--34F) and overheating protection to129C (265F). A coolant solution with lessthan 50% ethylene glycol may not provideadequate freezing and overheatingprotection. A coolant solution with morethan 50% ethylene glycol can cause engineor component damage. Do not mix long-lifecoolant and conventional coolants. Do notuse alcohol or methanol antifreeze or mixthem with the specified coolant.

3. Check the oil level before operating the engine.

4. Operate the engine with the radiator’s pressurecap removed until the thermostat opens and theradiator upper hose becomes hot.

5. Stop the engine and allow it to cool.

6. Add coolant to the radiator to just below theoverflow tube on the filler neck. See Figure 1-23.

7. Replace the radiator’s pressure cap.

8. Maintain the coolant level in the coolant overflowbottle between the High and Low markings. SeeFigure 1-23 for the coolant overflowbottle location.

Note: BlockHeater Damage. The block heater will failif the energized heater element is not immersedin coolant. Fill the cooling system before turningon the block heater. Run the engine until it iswarm, and refill the radiator to purge the air fromthe system before energizing the block heater.

Model

Coolant Capacity, L (gal.)

Engine Engine with Block Heater38RCL 15.4 (4.1) 16.9 (4.5)

48RCL 17.4 (4.6) 18.9 (5.0)

60RCL 17.4 (4.6) 18.9 (5.0)

Figure 1-22 Coolant Capacity

1. Engine coolant fill (pressure cap not shown)2. Overflow tube3. Coolant overflow bottle

3

GM85088

1 2

Figure 1-23 Coolant Fill


1.8 Prestart Installation Check

Review the entire installation section. Inspect all wiringand connections to verify that the generator set is readyfor operation. Check all items in the following PrestartChecklist.

Prestart Checklist

Air Cleaner. Check that a clean air cleaner element isinstalled to prevent unfiltered air from entering theengine. See the generator set operation manual forinstructions.

Air Inlets. Check for clean and unobstructed air inlets.

Battery. Check for tight battery connections. Consultthe battery manufacturer’s instructions regardingbattery care and maintenance.

Coolant Level. Check the coolant level as described inSection 1.7.

Note: BlockHeater Damage. The block heater will failif the energized heater element is not immersedin coolant. Fill the cooling system before turningon the block heater. Run the engine until it iswarm, and refill the radiator to purge the air fromthe system before energizing the block heater.

Enclosure. Check that all enclosure panels andinternal baffling are in place.

Exhaust System. Check for exhaust leaks andblockages. Check the muffler condition.

D Inspect the exhaust system components for cracks,leaks, and corrosion. Check for tight exhaust systemconnections.

D Check for corrodedor brokenmetal parts and replacethem as needed.

D Check that the exhaust outlet is unobstructed.

Oil Level. Maintain the oil level at or near, not over, thefull mark on the dipstick.

Operating Area. Check for obstructions that couldblock the flow of cooling air. Keep the air intake areaclean. Do not leave rags, tools, or debris on or near thegenerator set.

1.9 Set Exerciser

When power is applied to the RDC2 controller (that is,when the battery is connected), you will be prompted toset the date and time, and then to set the exerciser. Setthe exerciser to automatically run the generator set onthe desired day and time every week or every twoweeks.

Figure 1-24 shows the controller screens. The firstsetting will flash. Press the Up and Down arrow buttonsto change the setting. Press Select to save the settingandmoveon to thenext. Repeat until thedate, time, andexercise are set and the controller display shows themain menu. See TP-6810, Generator Set OperationManual, for more detailed instructions to set the dateand time and set the exerciser.

tp6803

Date:

05Dec2011

Time:

08:31a

Next Exercise:

08:31a 12Dec2011

Setting will flash.

Press the up and down arrowbuttons to change the setting.

Press Select to save thesetting.

Figure 1-24 Set Date, Time, and Exercise, RDC2Controller

In order to set a loaded exercise using the RDC2controller, a KohlerrModel RXT transfer switchmust beconnected. To set a loaded exercise on a generator setconnected to a transfer switch other than a Model RXT,use the transfer switch controller to set the exercise.Refer to the transfer switch operation manual forinstructions.

The controller must be in automatic mode for theexerciser to operate as scheduled. Press AUTO toplace the generator set controller into automatic mode.


1.10 Operation Tests



Moving parts.

WARNING

1. Verify that all guards are in place. Install theenclosure’s end panels and nonservice side door.

2. Check the items in the Prestart Checklist in thegenerator set operation manual.

3. Set the time and date, and then set the exerciser torun the generator set once a week or every other

week to keep the generator set in good operatingcondition. See TP-6710, Operation Manual, forinstructions to set the date and time and set theexerciser.

4. Press the RUN button on the generator setcontroller to start the generator set.

5. Use a digital voltmeter (DVM) to check the outputvoltage from the generator set. If voltagecalibration is required, refer to Section 3.5 forinstructions.

6. Press OFF to stop the engine. Then press AUTOon the RDC2 controller.

7. Install theenclosure’s service-sidedoor. Verify thatall enclosure doors and panels are installed. Lockthe enclosure doors to prevent unauthorizedaccess.

TP-6809 11/13 35Section 2 Accessories

Section 2 Accessories

2.1 Introduction

Accessories are available factory-installed and/orshipped loose. Obtain the most current list ofaccessories from the generator set specification sheetor by contactinganauthorizedKohler distributor/ dealer.

Have accessories installed by your local authorizedKohler distributor/dealer or authorized representative.Follow the installation instructions provided with each kit.

Use separate conduit for ACandDC leads to reduce thepossibility of electrical interference. Use shielded cablefor all analog inputs. Verify that the leadsandconduit donot interfere with the operation of the generator set orobstruct the service areas.

Refer to the wiring diagrams in Section 4 for moreinformation regarding generator set electricalconnections.

Verify that the accessory installation complies with theNational Electrical Code (NEC) and all applicable localand state codes.

The followingsectionsdetail a fewcommonaccessoriesand their functions. The instructions provided with theaccessory kit supersede these instructions, if different.

2.2 Block Heaters

Block heaters are available as loose accessories. Useblock heaters on standby applications where thegenerator set is frequently subjected to temperaturesbelow 0_C (32_F).

The generator set engine is equipped with valves thateliminate the need to drain the cooling system beforeinstalling the block heater. Refer to the installationinstructions provided with the block heater kit.

Connect the block heater to a power source that isenergized when the generator set is not running.

Note: Block heater damage. The block heater will failif the energized heater element is not immersedin coolant. Fill the cooling system before turningon the block heater. Run the engine until it iswarm and refill the radiator to purge the air fromthe system before energizing the block heater.

1

GM78529-C1. Block heater

Figure 2-1 Block Heater

TP-6809 11/1336 Section 2 Accessories

2.3 Programmable InterfaceModule (PIM)

The optional Programmable Interface Module (PIM)provides two programmable inputs and six dry contactoutputsfour of which are programmable. The PIM withenclosure is shown in Figure 2-2. See TT-1584 for PIMinstallation and connection instructions.

ThePIM ismounted inaNEMA3Raluminumenclosure,whichcanbemounted indoorsor outdoors. SeeSection1.4.9 and the installation instructions provided with thePIM for the maximum recommended cable lengths anddetailed installation instructions.

2.3.1 PIM to Generator Set Connections

The PIM communicates with the RDC2 generator setcontroller. Connect the PIMmodule to the generator setas shown in Section 1.4.9.

ADV--8199

Figure 2-2 Programmable Interface Module (PIM)(covered removed for illustration)

2.3.2 PIM Inputs and Outputs

Connect customer-supplied equipment to the PIM asinstructed in TT-1584.

Factory-default settings for the outputs are shown inFigure 2-3. The outputs are controlled by the RDC2controller. The run output is activated when thegenerator set is running. The common fault output isactivated on a fault.

Use a personal computer running Kohlerr OnCuer orSiteTecht software to assign functions to the otherinputs and outputs, and/or change the settings forfactory-set inputs and outputs. Verify that the input andoutput assignments match the connections to the PIMterminal strip.

Outputs 3 through 6 can also be controlled remotelyusing the OnCuer program. If an output is activated ordeactivated throughOnCue, it is no longer controlled bythe RDC2 controller. See the OnCue SoftwareOperation Manual for instructions.

PIM Connection Factory Default Setting

Input 1 None

Input 2 None

Output 1 (Relay 1) Run

Output 2 (Relay 2) Common Fault

Output 3 (Relay 3) Low Battery Voltage (programmable)

Output 4 (Relay 4) Not in Auto (programmable)

Output 5 (Relay 5) Cooldown (programmable)

Output 6 (Relay 6) Normal Source Failure(programmable)

Figure 2-3 PIM Factory Settings

TP-6809 11/13 37Section 2 Accessories

2.4 Load Control Module (LCM)

The optional Load Control Module (LCM) provides anautomatic load management system to comply withSection 702.5 of NEC2008. The installer is responsiblefor ensuring that the power system installation complieswith all applicable state and local codes.

The LCM automatically manages up to six residentialloads. Four power relays are provided for managementof non-essential secondary loads, and two relays areavailable to control two independent air conditionerloads.

Note: Connect only non-essential loads to the loadcontrol module.

The load on the generator set is monitored, and loadsare added or shed in the order of their priority.

TheLCMisavailablewithorwithoutapre-wiredharnessfor load relay connection. The prewire harness requiresinstallation of the LCM within 2 feet of the distributionpanel. The load control module with the optional wireharness is shown in Figure 2-4. If the harness is notused, connect to the terminal blocks inside the LCMenclosure. Figure 2-5 shows the load control modulewithout the optional harness.

Current transformers (CTs) on the emergency sourcelines are required for LCM operation. The CTs areincludedwith the LCMkits. Installation of the CTs insidethe transfer switch enclosure is recommended.

See TT-1574 for detailed installation and connectioninstructions.

Figure 2-4 Load Control Module (shown withoptional wire harness)

Figure 2-5 Load Control Module (cover removed toshow field-connection terminal blocks)

TP-6809 11/1338 Section 2 Accessories

2.5 OnCue Generator ManagementSystem

The OnCuer Generator Management System allowsmonitoring and control of your generator set from apersonal computer located in your home or at otherremote locations. OnCue can also be configured tosendemail or textmessagenotifications in theevent of agenerator set fault. See TP-6796, OnCue SoftwareOperation Manual, for software instructions.

TheOnCuesystem isavailable separatelyasa loosekit.Use category 5E network cable to connect the RDC2controller to the customer-supplied Ethernet router andcable or DSL modem. Route the cable with otherlow-voltage signal wiring (for example, the RBUScommunication leads or engine start leads to thetransfer switch), in separate conduit from the AC loadleads. If the network cable is longer than 100 meters(328 ft.), use a repeater or switch.

Recommended: Use a laptop computer to verify thenetwork connection before connecting to the generatorset.

Checking the network connection

1. Check for and turn OFF any wireless connectionsto the laptop.

2. Connect the network cable to the laptop. Connectthe other end of the network cable to thecustomer’s router or modem.

3. Verify the Internet connection by opening your webbrowser and going to www.kohlerpower.com oranother website.

4. After verifying the connection through the networkcable, disconnect the network cable from thelaptop and turn the laptop wireless connectionsback on.

Connect to the Ethernet cable in the customerconnection area of the generator set. See Figure 2-6.UseanRJ45 inline coupler, providedwith theOnCuekit,to connect the customer’s Ethernet cable to the cable inthe customer connection box.

1. Connect to Ethernet cable in customer connection box.

1

Figure 2-6 Network Connection for OnCue

TP-6809 11/13 39Section 3 Generator Reconnection

Section 3 Generator Reconnection

3.1 Voltage Reconnection

The reconnection procedure explains voltagereconnections only. Do not attempt to change thefrequency (e.g. from 60 Hz to 50 Hz) in the field.

The following instructions explain the reconnection of12-lead generator sets. In all cases, follow the NationalElectrical Code (NEC) guidelines.

Reconnect the stator leads of the generator set if adifferent output phase or voltage is desired. Refer to thefollowing procedure and the connection schematics.Follow all safety precautions at the front of this manualand in the text while performing this procedure.

Note: Order voltage reconnection decal 246242 froman authorized service distributor/dealer and affixdecal to generator set after reconnecting to avoltage different than the nameplate.

Accidental starting.Can cause severe injury or death.

Disconnect the battery cables beforeworking on the generator set.Remove the negative (--) lead firstwhen disconnecting the battery.Reconnect the negative (--) lead lastwhen reconnecting the battery.

WARNING

Disabling the generator set. Accidental starting cancause severe injury or death. Before working on thegenerator set or connected equipment, disable the generatorset as follows: (1) Move the generator setmaster switch to theOFFposition. (2) Disconnect the power to the battery charger.(3) Remove the battery cables, negative (--) lead first.Reconnect the negative (--) lead last when reconnecting thebattery. Follow these precautions to prevent starting of thegenerator set by an automatic transfer switch, remotestart/stop switch, or engine start command from a remotecomputer.



Moving parts.

WARNING

Grounding electrical equipment. Hazardous voltage cancause severe injury or death. Electrocution is possiblewhenever electricity is present. Ensure you comply with allapplicable codes and standards. Electrically ground thegenerator set, transfer switch, and related equipment andelectrical circuits. Turn off the main circuit breakers of allpower sources before servicing the equipment. Never contactelectrical leads or appliances when standing inwater or onwetground because these conditions increase the risk ofelectrocution.

Short circuits. Hazardous voltage/current can causesevere injury or death. Short circuits can cause bodily injuryand/or equipment damage. Do not contact electricalconnections with tools or jewelry while making adjustments orrepairs. Remove all jewelry before servicing the equipment.

TP-6809 11/1340 Section 3 Generator Reconnection

3.2 Four-Lead (Single-Phase)Generator Sets

Figure 3-1 shows the factory connection for the single-phase 120/240 V 60 Hz generator set. Four-lead,single-phase models are not reconnectable.

ADV-5857-A

Figure 3-1 Single-Phase Factory Connection,120/240 V 60 Hz

3.3 12-Lead (Three-Phase)Generator Sets

Three-phase, 12-leadgenerator sets are reconnectableto the voltages and phases shown on the generator setspecification sheet. See Figure 3-2 or Figure 3-3 anduse the following procedure to reconnect the generatorto the desired voltage configuration, change the systemvoltage setting, and adjust the output voltage.

Note: The current transformers (CTs) shown inFigure 3-3 are not used on Model 48RCL or60RCL generator sets.

Note: Equipment damage. Verify that the voltageratingsof the transfer switch, line circuit breakers,and other accessories match the selected linevoltage.

Reconnection Procedure

1. Press the OFF button on the RDC2 controller.

2. Disconnect engine starting battery, negative (--)lead first.

3. Disconnect utility power to the generator set.

4. Select desired voltage connection. See Figure 3-2for the 38RCL or Figure 3-3 for the 48RCL and60RCL. Connect the leads according to thediagram for desired phase and voltage.

5. Reconnect generator set engine starting battery,negative (--) lead last.

6. Follow the instructions in Section 3.4 to enter theRDC2 Genset System menu. Check the systemvoltage, frequency, and phase settings, andchange them if necessary.

7. Connect a digital multimeter (DVM) to thegenerator set output.

8. Press RUN to start the generator set.

9. Use a voltmeter to check for the correct voltageoutput from the generator set. Follow theinstructions in Section 3.5 to calibrate the voltageon the RDC2 controller, if necessary.

10. Press OFF to stop the generator set.

11. Reconnect utility power to the generator set.

12. Press AUTO to place the generator set inautomatic mode.


ADV-5875E-P

Figure 3-2 12-Lead Generator Reconnection, 38RCL


ADV-5875B-J

Note: The current transformers (CTs) shown above are not used onModel 48RCL or 60RCL generator sets equipped with the RDC2controller.

Figure 3-3 12-Lead Generator Reconnection, 48RCL and 60RCL


3.4 Changing System Settings

The RDC2 controller’s keypad and display allow theinstaller to check and change the generator systemsettings, if necessary. The system settings for eachgenerator model are set at the factory and should notnormally require changes. Check the genset systemsettings and change them, if necessary, after generatorreconnection or controller replacement.

The following procedure explains how to change thesystem settings. The procedure is also illustrated inFigure 3-6.

Procedure to Change System Settings

1. Press the Select button to enter the main menu.See Figure 3-4 and Figure 3-5. The Overviewscreen will be displayed.

2. Press the down arrow button to navigate to theGenset System menu. See Figure 3-5.

3. Press theSelect button to enter theGensetSystemmenu. See Figure 3-6.

4. Press the down arrow button to step through thegenerator set system settings to the setting thatyou wish to change.

5. When the setting is displayed (for example,System Voltage), press the select button. Thevalue will flash.

6. Press the up or down arrow buttons to increase ordecrease the setting.

7. When the desired setting is shown, press Select.The value stops flashing and the new setting issaved.

8. Press the down arrow to step to the next setting.

9. To exit, press the down arrow button until Return isdisplayed. Press the Select button to exit themenu.

10. Press the AUTO or OFF button to exit the mainmenu.

Note: If no buttons are pushed, the controller exits themenus and returns to the generator set statusdisplay after 5 minutes.

GM77569

2

1. Display2. Select button3. AUTO button

1

3

Figure 3-4 RDC2 Controller User Interface


Overview ---->1.2 h

Engine ---->Metering

tp6810

Generator---->Metering

Genset ---->Information

Genset ---->Run Time

Date ---->and Time

ATS ---->Configuration *

Genset ---->System

Event Log---->

Load ---->Control

PIM ---->Status

Network ---->Information

StatusDisplays

ATS ---->Status

* ATS configuration appears only if a Model RXT transfer switch is connected.

System voltage, frequency, and phaseadjustments are in the Genset Systemmenu.

Figure 3-5 RDC2 Main Menu


1. Press the Select button to enter the main menu.

2. Press the down arrow button to navigate to theGenset System menu. See Figure 3-5.

3. Press theSelect button to enter the genset systemmenu.

4. Press the down arrow button, if necessary, to stepto the setting that you want to change.

5. When the setting is displayed (for example,System Voltage), press the select button. Thevalue will flash.

6. Press the up or down arrow buttons to increase ordecrease the setting.

Press:

Changing System Settings on the RDC2 Controller

Press: Display:Overview ---->

1.2 h

Display:

Press: Display:

Genset ---->

System

System Voltage:

240 V

7. When the desired setting is shown, press Select.The value stops flashing.

8. Press the down arrow to step to the next setting.

9. To exit, press the down arrow button until Returnis displayed.

10. Press the Select button to exit the menu.

11. Press Auto to signal the controller to exit themenus and return to the generator set statusdisplay.

Press: Display:System Voltage

240 V

Press: Display:

Press: Display:System Freq:

60 Hz

Press: Display:Return ---->

Press: Display:

System Voltage

220 V

Overview ---->

1.2 h

AUTO

Press: Display:Genset State

Standby

Note: If no buttons are pushed, the controller returnsto the status display after 5 minutes.

Press: Display:System Voltage

220 V

Figure 3-6 Changing Genset System Settings


3.5 Voltage Calibration



Moving parts.

WARNING

Testing live electrical circuits. Hazardous voltage orcurrent can cause severe injury or death. Have trained andqualified personnel take diagnostic measurements of livecircuits. Use adequately rated test equipment with electricallyinsulated probes and follow the instructions of the testequipment manufacturer when performing voltage tests.Observe the following precautions when performing voltagetests: (1) Remove all jewelry. (2) Stand on a dry, approvedelectrically insulated mat. (3) Do not touch the enclosure orcomponents inside the enclosure. (4) Be prepared for thesystem to operate automatically.(600 volts and under)

Short circuits. Hazardous voltage/current can causesevere injury or death. Short circuits can cause bodily injuryand/or equipment damage. Do not contact electricalconnections with tools or jewelry while making adjustments orrepairs. Remove all jewelry before servicing the equipment.

Correct voltage calibration is necessary for propergenerator set operation. Check the voltage calibrationafter controller replacement or generator setreconnection, and adjust if necessary.

The RDC2 controller can be calibrated using thecontroller keypad and menus, or using a personalcomputer with Kohlerr SiteTecht software.

3.5.1 Calibration using the RDC2Controller Keypad and Menus

The controller’s voltage calibration can be adjustedusing the controller keypad. See Figure 3-7 and followthe procedure below.

Note: A digital voltmeter is required for theseadjustments.

1. With the generator set off, connect a digitalmultimeter to measure output voltage across L1and L2. Set the meter to measure AC volts.

2. Start the generator set by pressing the RUNbuttonon the RDC2 controller.

3. On the RDC2 controller, press the Select buttonand then use the arrow buttons to navigate to theGenerator Metering menu on the RDC2 controller.

4. Press the Select button to display Volts L1-L2.Compare the number displayed with the voltmeterreading.

5. If the correct voltage is not displayed, follow thesesteps to adjust it:

a. Press the Select button. The voltage will flash.

b. Press the up or down arrow button to adjust thevoltage to match the voltmeter reading.

c. Press Select to save the voltage setting. Thevoltage stops flashing.

d. Wait for the voltmeter reading to stabilize. Thismay take 30 to 60 seconds.

6. For three-phase models, press the Down arrowbutton and repeat the calibration procedure forvoltage across L2--L3 and L3--L1.

7. Use the arrow buttons to step down to the Returnscreen. Press Select to exit the GeneratorMetering menu.


Reset Calibration

Pressing the select button when “Reset Calibration?Yes” is displayed will discard the changes and reset thecalibration to the original settings. See Figure 3-7.


Volts L1--L2:240 V

Volts L2--L3:240 V

Volts L3--L1:240 V

Generator ---->Metering

ResetCalibration

<---- Return

ResetCalibration? No

Volts:240V

Three-phase Single-phase

tp6811

ResetCalibration? Yes

Frequency:60.0 Hz

Frequency:60.0 Hz

1. Press Select when the voltage isdisplayed. The voltage flashes.

2. Press the Up or Down arrow but-ton to change the setting.

3. Press theSelect button to save thesetting.

4. Press the down arrow button tomove to the next menu.

Calibrate

Calibrate

Calibrate

Calibrate

Note: Pressing select when Reset Calibration: Yes is displayed will discardthe changes and reset the calibration to the original settings.

To Calibrate Voltage:

Figure 3-7 Voltage Calibration


3.5.2 Calibration Using SiteTech

Voltage calibration factors can be adjusted usingSiteTech software to calibrate the RDC2 controller.Connect a personal computer (laptop) to the controllerusing a USB cable and follow this procedure to useKohlerr SiteTecht software to calibrate the controller.

The voltage calibration factors are located in theGensetCalibration group in SiteTecht. Find the parameterlabelledGenset Calibration Factor Voltage, L1--L2. SeeFigure 3-9.

Note: A digital voltmeter is required for theseadjustments.

1. With the generator set off, connect a digitalmultimeter to measure output voltage across L1and L2. Set the meter to measure AC volts.

2. Start the generator set by pressing the RUNbuttonon the RDC2 controller.

3. Compare the voltage reading on the digitalvoltmeter to the voltage displayed by the controller.

4. If the voltage displayed on the controller does notmatch the measured voltage, use the equation inFigure 3-8 to calculate a new value for GensetCalibration Factor Voltage, L1--L2.

5. Type the new value for Genset Calibration FactorVoltage, L1--L2 into SiteTech and click on ApplyChanges. See Figure 3-9.

6. Allow a few seconds for the controller to adjust tothe new factor and then compare the voltmeterreading with the voltage displayed on thecontroller.

7. If the voltage readings do not match, check yourcalculations. Check the calibration factor and both

voltage readings again. Repeat the procedureusing the new values, if necessary.

Note: If youwould like to simplify the calculation, set thecalibration factor to 1.0000 and then repeat thecalibration procedure from step 3.

8. Repeat the procedure for voltage across L2--L3and L3--L1, if necessary. (Three-phase only.)


( Vmeter÷Vcontrol ) x Fold = Fnew

Vmeter = Voltmeter reading

Vcontrol = Voltage displayed on controller

Fold = Genset Calibration Factor Voltage, L1--L2,from SiteTech before calibration

Fnew = New value to enter for Genset CalibrationFactor Voltage, L1--L2, in SiteTech

Example:

Voltmeter reading: 241.2

Controller display: 240

Old calibration factor (from SiteTech): 1.0063

New calibration factor:

(241.2÷ 240) x 1.0063 = 1.0113

Figure 3-8 Voltage Calibration Factor


1

#

1. Voltage calibration factor

Figure 3-9 Voltage Calibration Factor in SiteTecht


Notes

TP-6809 11/13 51Section 4 Diagrams and Drawings

Section 4 Diagrams and Drawings

This section contains dimension drawings, wiringdiagrams, and schematics for the enclosed generatorset. Figure 4-1 lists the drawing numbers and pagenumbers. Drawings are arranged in numerical order onthe following pages.

See the generator set Operation Manual for serviceviews, if necessary.

Drawing Description

38RCL 48RCL 60RCL

Drawing Number Page Drawing Number Page Drawing Number Page

Dimension Drawing:

Dimensions ADV-8494, 1 of 2 58 ADV-8494, 1 of 2 58 ADV-8545, 1 of 2 60

Installation clearances ADV-8494, 2 of 2 59 ADV-8494, 2 of 2 59 ADV-8545, 2 of 2 61

Wiring Diagrams:

Schematic:

Generator Set, Sheet 1 ADV-8484, 1 of 3 55 ADV-8061, 1 of 2 53 ADV-8061, 1 of 2 53

Generator Set, Sheet 2 ADV-8484, 2 of 3 56 ADV-8061, 2 of 2 54 ADV-8061, 2 of 2 54

Generator Set, Sheet 3 ADV-8484, 3 of 3 57 — —

Alternator — ADV-6957 52 ADV-6957 52

Wiring Diagram:

Generator Set, Sheet 1 GM85226, 1 of 2 65 GM79871, 1 of 2 63 GM79871, 1 of 2 63

Generator Set, Sheet 2 GM85226, 2 of 2 66 GM79871, 2 of 2 64 GM79871, 2 of 2 64

Alternator — GM35943 62 GM35943 62

Figure 4-1 Drawing Numbers and Locations

TP-6809 11/1352 Section 4 Diagrams and Drawings

Figure 4-2 Schematic, 48/60RCL Alternator, ADV-6957


Figure 4-3 Schematic Diagram, 48RCL/60RCL Generator Set, ADV-8061, Sheet 1 of 2


Figure 4-4 Schematic Diagram, 48RCL/60RCL Generator Set, ADV-8061, Sheet 2 of 2


Figure 4-5 Schematic Diagram, 38RCL Generator Set, ADV-8484, Sheet 1 of 3






Figure 4-8 Dimension Drawing, 38/48RCL, ADV-8494, Sheet 1 of 2


Figure 4-9 Dimension Drawing, 38/48RCL, ADV-8494, Sheet 2 of 2


Figure 4-10 Dimension Drawing 60RCL, ADV-8545, Sheet 1 of 2


Figure 4-11 Dimension Drawing 60RCL, ADV-8545, Sheet 2 of 2


Figure 4-12 Wiring Diagram, 48/60RCL Alternator, GM35943


Figure 4-13 Wiring Diagram, 48RCL/60RCL Generator Set, GM79871, Sheet 1 of 2


Figure 4-14 Wiring Diagram, 48RCL/60RCL Generator Set, GM79871, Sheet 2 of 2


Figure 4-15 Wiring Diagram, 38RCL Generator Set, GM85226, Sheet 1 of 2


Figure 4-16 Wiring Diagram, 38RCL Generator Set, GM85226, Sheet 2 of 2

TP-6809 11/13 Appendix 67

Appendix A Abbreviations

The following list contains abbreviations that may appear in this publication.

A, amp ampereABDC after bottom dead centerAC alternating currentA/D analog to digitalADC advanced digital control;

analog to digital converteradj. adjust, adjustmentADV advertising dimensional

drawingAh amp-hourAHWT anticipatory high water

temperatureAISI American Iron and Steel

InstituteALOP anticipatory low oil pressurealt. alternatorAl aluminumANSI American National Standards

Institute (formerly AmericanStandards Association, ASA)

AO anticipatory onlyAPDC Air Pollution Control DistrictAPI American Petroleum Instituteapprox. approximate, approximatelyAPU Auxiliary Power UnitAQMD Air Quality Management DistrictAR as required, as requestedAS as supplied, as stated, as

suggestedASE American Society of EngineersASME American Society of

Mechanical Engineersassy. assemblyASTM American Society for Testing

MaterialsATDC after top dead centerATS automatic transfer switchauto. automaticaux. auxiliaryavg. averageAVR automatic voltage regulatorAWG American Wire GaugeAWM appliance wiring materialbat. batteryBBDC before bottom dead centerBC battery charger, battery

chargingBCA battery charging alternatorBCI Battery Council InternationalBDC before dead centerBHP brake horsepowerblk. black (paint color), block

(engine)blk. htr. block heaterBMEP brake mean effective pressurebps bits per secondbr. brassBTDC before top dead centerBtu British thermal unitBtu/min. British thermal units per minuteC Celsius, centigradecal. calorieCAN controller area networkCARB California Air Resources BoardCAT5 Category 5 (network cable)CB circuit breakerCC crank cyclecc cubic centimeterCCA cold cranking ampsccw. counterclockwiseCEC Canadian Electrical Codecert. certificate, certification, certifiedcfh cubic feet per hour

cfm cubic feet per minuteCG center of gravityCID cubic inch displacementCL centerlinecm centimeterCMOS complementary metal oxide

substrate (semiconductor)com communications (port)coml commercialComl/Rec Commercial/Recreationalconn. connectioncont. continuedCPVC chlorinated polyvinyl chloridecrit. criticalCSA Canadian Standards

AssociationCT current transformerCu coppercUL Canadian Underwriter’s

LaboratoriesCUL Canadian Underwriter’s

Laboratoriescu. in. cubic inchcw. clockwiseCWC city water-cooledcyl. cylinderD/A digital to analogDAC digital to analog converterdB decibeldB(A) decibel (A weighted)DC direct currentDCR direct current resistancedeg., degreedept. departmentdia. diameterDI/EO dual inlet/end outletDIN Deutsches Institut fur Normung

e. V. (also Deutsche IndustrieNormenausschuss)

DIP dual inline packageDPDT double-pole, double-throwDPST double-pole, single-throwDS disconnect switchDVR digital voltage regulatorE2PROM, EEPROM

electrically-erasableprogrammable read-onlymemory

E, emer. emergency (power source)ECM electronic control module,

engine control moduleEDI electronic data interchangeEFR emergency frequency relaye.g. for example (exempli gratia)EG electronic governorEGSA Electrical Generating Systems

AssociationEIA Electronic Industries

AssociationEI/EO end inlet/end outletEMI electromagnetic interferenceemiss. emissioneng. engineEPA Environmental Protection

AgencyEPS emergency power systemER emergency relayES engineering special,

engineered specialESD electrostatic dischargeest. estimatedE-Stop emergency stopetc. et cetera (and so forth)

exh. exhaustext. externalF Fahrenheit, femaleFHM flat head machine (screw)fl. oz. fluid ounceflex. flexiblefreq. frequencyFS full scaleft. foot, feetft. lb. foot pounds (torque)ft./min. feet per minuteftp file transfer protocolg gramga. gauge (meters, wire size)gal. gallongen. generatorgenset generator setGFI ground fault interrupter

GND, groundgov. governorgph gallons per hourgpm gallons per minutegr. grade, grossGRD equipment groundgr. wt. gross weightH x W x D height by width by depthHC hex capHCHT high cylinder head temperatureHD heavy dutyHET high exhaust temp., high

engine temp.hex hexagonHg mercury (element)HH hex headHHC hex head capHP horsepowerhr. hourHS heat shrinkhsg. housingHVAC heating, ventilation, and air

conditioningHWT high water temperatureHz hertz (cycles per second)IBC International Building CodeIC integrated circuitID inside diameter, identificationIEC International Electrotechnical

CommissionIEEE Institute of Electrical and

Electronics EngineersIMS improved motor startingin. inchin. H2O inches of waterin. Hg inches of mercuryin. lb. inch poundsInc. incorporatedind. industrialint. internalint./ext. internal/externalI/O input/outputIP internet protocolISO International Organization for

StandardizationJ jouleJIS Japanese Industry Standardk kilo (1000)K kelvinkA kiloampereKB kilobyte (210 bytes)KBus Kohler communication protocolkg kilogram

TP-6809 11/1368 Appendix

kg/cm2 kilograms per squarecentimeter

kgm kilogram-meterkg/m3 kilograms per cubic meterkHz kilohertzkJ kilojoulekm kilometerkOhm, k kilo-ohmkPa kilopascalkph kilometers per hourkV kilovoltkVA kilovolt amperekVAR kilovolt ampere reactivekW kilowattkWh kilowatt-hourkWm kilowatt mechanicalkWth kilowatt-thermalL literLAN local area networkL x W x H length by width by heightlb. pound, poundslbm/ft3 pounds mass per cubic feetLCB line circuit breakerLCD liquid crystal displayLED light emitting diodeLph liters per hourLpm liters per minuteLOP low oil pressureLP liquefied petroleumLPG liquefied petroleum gasLS left sideLwa sound power level, A weightedLWL low water levelLWT low water temperaturem meter, milli (1/1000)M mega (106 when used with SI

units), malem3 cubic meterm3/hr. cubic meters per hourm3/min. cubic meters per minutemA milliampereman. manualmax. maximumMB megabyte (220 bytes)MCCB molded-case circuit breakerMCM one thousand circular milsmeggar megohmmeterMHz megahertzmi. milemil one one-thousandth of an inchmin. minimum, minutemisc. miscellaneousMJ megajoulemJ millijoulemm millimetermOhm, mmilliohmMOhm, MmegohmMOV metal oxide varistorMPa megapascalmpg miles per gallonmph miles per hourMS military standardms millisecondm/sec. meters per secondmtg. mountingMTU Motoren-und Turbinen-UnionMW megawattmW milliwattF microfaradN, norm. normal (power source)NA not available, not applicablenat. gas natural gasNBS National Bureau of Standards

NC normally closedNEC National Electrical CodeNEMA National Electrical

Manufacturers AssociationNFPA National Fire Protection

AssociationNm newton meterNO normally openno., nos. number, numbersNPS National Pipe, StraightNPSC National Pipe, Straight-couplingNPT National Standard taper pipe

thread per general useNPTF National Pipe, Taper-FineNR not required, normal relayns nanosecondOC overcrankOD outside diameterOEM original equipment

manufacturerOF overfrequencyopt. option, optionalOS oversize, overspeedOSHA Occupational Safety and Health

AdministrationOV overvoltageoz. ouncep., pp. page, pagesPC personal computerPCB printed circuit boardpF picofaradPF power factorph., phasePHC Phillipsr head Crimptiter

(screw)PHH Phillipsr hex head (screw)PHM pan head machine (screw)PLC programmable logic controlPMG permanent magnet generatorpot potentiometer, potentialppm parts per millionPROM programmable read-only

memorypsi pounds per square inchpsig pounds per square inch gaugept. pintPTC positive temperature coefficientPTO power takeoffPVC polyvinyl chlorideqt. quart, quartsqty. quantityR replacement (emergency)

power sourcerad. radiator, radiusRAM random access memoryRBUS RS-485 proprietary

communicationsRDO relay driver outputref. referencerem. remoteRes/Coml Residential/CommercialRFI radio frequency interferenceRH round headRHM round head machine (screw)rly. relayrms root mean squarernd. roundRO read onlyROM read only memoryrot. rotate, rotatingrpm revolutions per minuteRS right sideRTDs Resistance Temperature

Detectors

RTU remote terminal unitRTV room temperature vulcanizationRW read/writeSAE Society of Automotive

Engineersscfm standard cubic feet per minuteSCR silicon controlled rectifiers, sec. secondSI Systeme international d’unites,

International System of UnitsSI/EO side in/end outsil. silencerSMTP simple mail transfer protocolSN serial numberSNMP simple network management

protocolSPDT single-pole, double-throwSPST single-pole, single-throwspec specificationspecs specification(s)sq. squaresq. cm square centimetersq. in. square inchSMS short message serviceSS stainless steelstd. standardstl. steeltach. tachometerTB terminal blockTCP transmission control protocolTD time delayTDC top dead centerTDEC time delay engine cooldownTDEN time delay emergency to

normalTDES time delay engine startTDNE time delay normal to

emergencyTDOE time delay off to emergencyTDON time delay off to normaltemp. temperatureterm. terminalTHD total harmonic distortionTIF telephone influence factortol. toleranceturbo. turbochargertyp. typical (same in multiple

locations)UF underfrequencyUHF ultrahigh frequencyUIF user interfaceUL Underwriter’s Laboratories, Inc.UNC unified coarse thread (was NC)UNF unified fine thread (was NF)univ. universalURL uniform resource locator

(web address)US undersize, underspeedUV ultraviolet, undervoltageV voltVAC volts alternating currentVAR voltampere reactiveVDC volts direct currentVFD vacuum fluorescent displayVGA video graphics adapterVHF very high frequencyW wattWCR withstand and closing ratingw/ withWO write onlyw/o withoutwt. weightxfmr transformer

TP-6809 11/13 69

Notes

TP-6809 11/1370

Notes

KOHLER CO. Kohler, Wisconsin 53044Phone 920-457-4441, Fax 920-459-1646

Kohler Power SystemsAsia Pacific Headquarters7 Jurong Pier RoadSingapore 619159Phone (65) 6264-6422, Fax (65) 6264-6455

For the nearest KOHLER authorizedinstallation, service, and sales dealer inthe US and Canada:Call 1-800-544-2444 or visitKOHLERPower.comE 2012, 2013 by Kohler Co. All rights reserved.

TP-6809 11/13b

Documents

Residential/Light Commercial Generator Sets · 2 TP-6809 11/13 Engineexhaustfromthisproductcontainschemicals knowntotheStateofCaliforniatocausecancer,birth defects, or other reproductive