WALL MOUNTED PACKAGED INSTALLATION AIR ......Manual 2100-404 Page 5 FILTERS A 1 inch throw away filter is suppled with each unit. The filter slides into position making it easy to

MIS-656

© Copyright 2002

Manual No.: 2100-404ASupersedes: 2100-404File: Volume III, Tab 16Date: 07-02-04

Bard Manufacturing CompanyBryan, Ohio 43506

Since 1914...moving ahead just as planned.

INSTALLATIONINSTRUCTIONS Models: WA302

WA372

WALL MOUNTEDPACKAGEDAIR CONDITIONER

Contents

i

Start UpImportant Installer Note ......................................... 13High Pressure Switch ............................................ 12Three Phase Scroll Compressor Start UpInformation ............................................................. 13Phase Monitor ....................................................... 13Service Hints ......................................................... 13Sequence of Operation .......................................... 13Compressor Control Module .................................. 14Adjustments ........................................................... 14Pressure Service Ports .......................................... 14

TroubleshootingFan Blade Setting Dimensions .............................. 15Removal of Fan Shroud ......................................... 15Refrigerant Charge ................................................ 15Cooling Pressures ................................................. 16Optional Accessories ............................................. 17

Figures

Figure 1 Unit Dimensions ....................................... 3Figure 2 Blower Damper Assembly ......................... 5Figure 3 Mounting Instructions ............................... 8Figure 4 Wall-Mounting Instructions ....................... 9Figure 5 Wall-Mounting Instructions ....................... 9Figure 6 Common Wall-Mounting Installations ..... 10Figure 7 Electric Heat Clearances ......................... 11Figure 8 Low Voltage Wiring ................................. 12Figure 9 Fan Blade Setting ................................... 15

Tables

Table 1 Electrical Specifications .......................... 2Table 2 Dimensions of Basic Unit ........................ 3Table 3 Electric Heat Table .................................. 4Table 4 Operating Voltage Range ........................ 7Table 5 Thermostat Wire Size ............................. 7Table 6 Wall Thermostat and

Subbase Combinations ........................... 7

Table 7 Fan Blade Dimensions .......................... 15Table 8 Suction Line Temperatures ................... 15Table 9 Indoor Blower Performance .................. 15Table 10 CFM and ESP ....................................... 15Table 11 Maximum ESP of Operation

Electric Heat Only ................................. 15Table 12 Cooling Pressure .................................. 16Table 13 Optional Accessories ............................ 17

Getting Other Information and PublicationsFor more information,contact these publishers .......................................... 1

Wall Mount General InformationAir Conditioner Wall Mount Model Nomenclature .... 2Shipping Damage .................................................... 4General .................................................................... 4Duct Work ................................................................ 5Filters ....................................................................... 5Fresh Air Intake ....................................................... 5Condensate Drain .................................................... 5

Installation InstructionsWall Mounting Information ....................................... 6Mounting the Unit .................................................... 6Top Outlet Only ........................................................ 6Wiring � Main Power .............................................. 6Wiring � Low Voltage Wiring .................................. 7

Manual 2100-404Page 1

Getting Other Information and Publications

These publications can help you install the airconditioner or heat pump. You can usually find these atyour local library or purchase them directly from thepublisher. Be sure to consult current edition of eachstandard.

National Electrical Code ....................... ANSI/NFPA 70

Standard for the Installation ............... ANSI/NFPA 90Aof Air Conditioning andVentilating Systems

Standard for Warm Air ........................ANSI/NFPA 90BHeating and AirConditioning Systems

Load Calculation for ............................. ACCA Manual JResidential Winter andSummer Air Conditioning

Duct Design for Residential ................ACCA Manual DWinter and Summer AirConditioning and EquipmentSelection

FOR MORE INFORMATION, CONTACTTHESE PUBLISHERS:

ACCA Air Conditioning Contractors of America1712 New Hampshire Avenue NWWashington, DC 20009Telephone: (202) 483-9370Fax: (202) 234-4721

ANSI American National Standards Institute11 West Street, 13th FloorNew York, NY 10036Telephone: (212) 642-4900Fax: (212) 302-1286

ASHRAE American Society of Heating Refrigerating,and Air Conditioning Engineers, Inc.1791 Tullie Circle, N.E.Atlanta, GA 30329-2305Telephone: (404) 636-8400Fax: (404) 321-5478

NFPA National Fire Protection AssociationBatterymarch ParkP.O. Box 9101Quincy, MA 02269-9901Telephone: (800) 344-3555Fax: (617) 984-7057

Manufactured under the following U.S. patent numbers:5,485,878; 5,301,744; 5,002,116; 4,924,934;

4,875,520; 4,825,936; 4,432,409


WALL MOUNT GENERAL INFORMATIONAIR CONDITIONER WALL MOUNT MODEL NOMENCLATURE

KW

WA 37 2 � A 10 X X X X X A

VOLTS & PHASEA - 230/208/60/1B - 230/208/60/3C - 460/60/3

MODELNUMBER

REVISIONS

CAPACITY25 - 2 Ton37 - 3 Ton

VENTILATION OPTIONSX - Barometric Fresh Air Damper

(Standard)B - Blank-off PlateM - Motorized Fresh Air DamperV - Commercial Room Ventilator -

Motorized with ExhaustE - Economizer (Internal - Fully

Modulating with ExhaustR - Energy Recovery Ventilator -

with Exhaust

FILTER OPTIONSX - One Inch Throwaway

(Standard)W- One Inch WashableP - Two Inch Pleated

COLOR OPTIONSX - Beige (Standard)1 - White2 - Mesa Brown4 - Buckeye Gray5 - Desert Brown6 - Dark Bronze

CONTROL MODULES(See Spec. Sheet S3208)

COIL OPTIONS X- Standard 1 - Phenolic Coated Evaporator 2 - Phenolic Coated Condenser 3 - Phenolic Coated Evaporator

and Condenser

OUTLET OPTIONS X - Front (Standard) T - Top on WA30 and WA37

Models

NOTE: For 0KW and circuit breakers (230/208 Volt) or pull disconnects (460 Volt) applications, insert 0Z in the KW field of model no.

!"# Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.

Based on 75° copper wire. All wiring must conform to the National Electrical Code and all local codes.These "Minimum Circuit Ampacity" values are to be used for sizing the field power conductors. Refer to the National Electric Code(latest revision), Article 310 for power conductor sizing. CAUTION: When more than one field power conductor circuit is runthrough one conduit, the conductors must be derated. Pay special attention to note 8 of table 310 regarding Ampacity AdjustmentFactors when more than three conductors are in a raceway.

TABLE 1 � ELECTRICAL SPECIFICATIONS

sledoM

detaR/stloVsesahP

.oNdleiFrewoPstiucriC

3

muminiMtiucriCyticapmA

1

mumixaMlanretxEroesuF.tkCrekaerB

2

dleiFrewoPeriWeziS

2

dnuorGeriWeziS

3

muminiMtiucriCyticapmA

1mumixaMlanretxE

esuF.tkCrorekaerB

2

rewoPdleiFeziSeriW

2

dnuorGeziSeriW

TKCA

TKCB

TKCA

TKCB

TKCA

TKCB

TKCA

TKCB

Z0A-203AW50A01A51A

1-802/032111

2ro1

42137538

53530609

8864

010101

8

ANANAN55

ANANAN62

ANANAN06

ANANAN03

ANANAN

4

ANANAN01

ANANAN

8

ANANAN01

Z0B-203AW90B51B

3-802/032111

712305

025305

2188

210101

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

Z0C-203AW90C51C

3-064111

017162

510203

412101

412101

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

ANANAN

Z0A-273AW50A80A01A51A

1-802/032

1111

2ro1

8223748548

5353050609

88864

01010101

8

ANANANAN85

ANANANAN62

ANANANAN06

ANANANAN03

ANANANAN

6

ANANANAN01

ANANANAN01

ANANANAN01

Z0B-273LW60B90B51B

3-802/0321111

02423315

52525306

0101

86

01010101

ANANANAN

ANANANAN

ANANANAN

ANANANAN

ANANANAN

ANANANAN

ANANANAN

ANANANAN

Z0C-273LW60C90C21C51C

3-064

11111

1121711262

5151025203

4141210101

4141210101

ANANANANAN

ANANANANAN

ANANANANAN

ANANANANAN

ANANANANAN

ANANANANAN

ANANANANAN

ANANANANAN


FIG

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TAB

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NO

PQ

RS

TA

BC

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203A

W273

AW

02.83521.71

365.0788.7

88.7288.31

88.7200.04

05.8157.52

39.7157.62

57.8252.92

00.7257.2

91.9357.22

41.991.4

00.2100.5

FRO

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WSI

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VIEW


SHIPPING DAMAGEUpon receipt of equipment, the carton should bechecked for external signs of shipping damage. Ifdamage is found, the receiving party must contact thelast carrier immediately, preferably in writing,requesting inspection by the carrier�s agent.

GENERALThe equipment covered in this manual is to be installedby trained, experienced service and installationtechnicians.

The refrigerant system is completely assembled andcharged. All internal wiring is complete.

The unit is designed for use with or without duct work.Flanges are provided for attaching the supply and returnducts.

These instructions explain the recommended method toinstall the air cooled self-contained unit and theelectrical wiring connections to the unit.

These instructions and any instructions packaged withany separate equipment required to make up the entireair conditioning system should be carefully read beforebeginning the installation. Note particularly �StartingProcedure� and any tags and/or labels attached to theequipment.

While these instructions are intended as a generalrecommended guide, they do not supersede any nationaland/or local codes in any way. Authorities havingjurisdiction should be consulted before the installation ismade. SeePage 1 for information on codes and standards.

Size of unit for a proposed installation should be basedon heat loss calculation made according to methods ofAir Conditioning Contractors of America (ACCA). Theair duct should be installed in accordance with theStandards of the National Fire Protection Association forthe Installation of Air Conditioning and VentilatingSystems of Other Than Residence Type, NFPA No. 90A,and Residence Type Warm Air Heating and AirConditioning Systems, NFPA No. 90B. Where localregulations are at a variance with instructions, installershould adhere to local codes.

TABLE 3ELECTRIC HEAT TABLE

sledoM A-203AWA-273AW

B-203AWB-273AW C-203AW

C-273AW

1-V042 1-V802 3-V042 3-V802 3-V064

WK SPMA HUTB SPMA HUTB SPMA HUTB SPMA HUTB SPMA HUTB

0.5 8.02 560,71 1.81 008,21 --- --- --- --- --- ---

0.01 6.14 031,43 2.63 006,52 --- --- --- --- --- ---

0.51 5.26 002,15 1.45 004,83 --- --- --- --- --- ---

0.6 --- --- --- --- 4.41 005,02 5.21 063,51 2.7 574,02

0.9 --- --- --- --- 7.12 006,03 7.81 030,32 8.01 007,03

0.51 --- --- --- --- 2.63 002,15 2.13 004,83 0.81 002,15

0.21 --- --- --- --- --- --- --- --- 4.41 059,04


FILTERSA 1 inch throw away filter is suppled with each unit.The filter slides into position making it easy to service.This filter can be serviced from the outside by removingthe service door. A 1 inch washable filter and a 2 inchpleated filter are also available as optional accessories.The internal filter brackets are adjustable toaccommodate the 2 inch filter by bending the metal tabsholding the 1 inch filter down. There are two tabs oneach side of the filter.

FRESH AIR INTAKEAll units are built with fresh air inlet slots punched inthe service panel.

If the unit is equipped with the fresh air damperassembly, the assembly is shipped already attached tothe unit. The damper blade is locked in the closedposition. To allow the damper to operate, the maximumand minimum blade position stops must be installed.See Figure 2.

All capacity, efficiency and cost of operationinformation as required for Department of Energy�Energyguide� Fact Sheets is based upon the fresh airblank-off plate in place and is recommended formaximum energy efficiency.

The blank-off plate is available upon request from thefactory and is installed in place of the fresh air dampershipped with each unit.

CONDENSATE DRAINA plastic drain hose extends from the drain pan at thetop of the unit down to the unit base. There are openingsin the unit base for the drain hose to pass through. In theevent the drain hose is connected to a drain system ofsome type, it must be an open or vented type system toassure proper drainage.

DUCT WORKAll duct work, supply and return, must be properly sizedfor the design air flow requirement of the equipment. AirConditioning Contractors of America (ACCA) is anexcellent guide to proper sizing. All duct work orportions thereof not in the conditioned space should beproperly insulated in order to both conserve energy andprevent condensation or moisture damage.

Refer to Table 10 for maximum static pressure availablefor duct design.

Design the duct work according to methods given by theAir Conditioning Contractors of America (ACCA).When duct runs through unheated spaces, it should beinsulated with a minimum of 1 inch of insulation. Useinsulation with a vapor barrier on the outside of theinsulation. Flexible joints should be used to connect theduct work to the equipment in order to keep the noisetransmission to a minimum.

A 1/4 inch clearance to combustible material for the first3 feet of duct attached to the outlet air frame is required.See Wall Mounting Instructions and Figures 3 and 4 forfurther details.

Ducts through the walls must be insulated and all jointstaped or sealed to prevent air or moisture entering thewall cavity.

Any grille that meets the 5/8 inch louver criteria may beused. It is recommended that Bard Return Air Grille KitRG-2 through RG-5 or RFG-2 through RFG-5 beinstalled when no return duct is used. Contactdistributor or factory for ordering information. If usinga return air filter grille, filters must be of sufficient sizeto allow a maximum velocity of 400 fpm.

CAUTIONSome installations may not require any returnair duct. A metallic return air grille is requiredwith installations not requiring a return airduct. The spacing between louvers on thegrille shall not be larger than 5/8 inches.

FIGURE 2FRESH AIR DAMPER ASSEMBLY

BLADE IS LOCKEDCLOSED FORSHIPPING

MIS-938


INSTALLATION INSTRUCTIONS

WALL MOUNTING INFORMATION1. Two holes, for the supply and return air openings,

must be cut through the wall as shown in Figure 3.2. On wood-frame walls, the wall construction must be

strong and rigid enough to carry the weight of the unitwithout transmitting any unit vibration.

WARNINGFire hazard can result if 1/4 inch clearance tocombustible materials for supply air duct is notmaintained. See Figure 3.

3. Concrete block walls must be thoroughly inspected toinsure that they are capable of carrying the weight ofthe installing unit.

MOUNTING THE UNIT1. These units are secured by wall mounting brackets

which secure the unit to the outside wall surface atboth sides. A bottom mounting bracket is provided forease of installation, but is not required.

2. The unit itself is suitable for �0� inch clearance, butthe supply air duct flange and the first 3 feet of supplyair duct require a minimum of 1/4 inch clearance tocombustible material. If a combustible wall, use aminimum of 28-1/2" x 8-1/2" dimensions for sizing.However, it is generally recommended that a 1 inchclearance is used for ease of installation andmaintaining the required clearance to combustiblematerial.

TOP OUTLET ONLY1. Remove airframe angles from the back of the unit.

2. Coat angles with two 1/8" beads of silicone asshown. Silicone is shipped in the control panel. SeeFigure 5.

3. Secure angles to the top of the unit with 14 screwsprovided. Use of prepunched holes provided. Do notrelocate. See Figure 5.

4. After installation duct work, seal around airframe andduct work to provide a rain tight seal.

5. It is strongly recommended, but not required, thatthis unit be installed under a soffit area large enoughto shield the top of the unit. See Figure 6.

WIRING � MAIN POWERRefer to the unit rating plate for wire sizing informationand maximum fuse or �HACR Type� circuit breakersize. Each outdoor unit is marked with a �MinimumCircuit Ampacity�. This means that the field wiringused must be sized to carry that amount of current.Depending on the installed KW of electric heat, theremay be two field power circuits required. If this is thecase, the unit serial plate will so indicate. All modelsare suitable only for connection with copper wire. Eachunit and/or wiring diagram will be marked �Use CopperConductors Only�. These instructions must be adheredto. Refer to the National Electrical Code (NEC) forcomplete current carrying capacity data on the variousinsulation grades of wiring material. All wiring mustconform to NEC and all local codes.

WARNINGFailure to provide the 1/4 inch clearancebetween the supply duct and a combustiblesurface for the first 3 feet of duct can result infire.

3. Locate and mark lag bolt locations and bottommounting bracket location. See Figure 3.

4. Mount bottom mounting bracket, if used The supplyair opening would then be 30" x 10". See Figures 3and 4 for details.

5. Hook top rain flashing under back bend of top. Toprain flashing is shipped secured to the right side of theback.

6. Position unit in opening and secure with 5/16 lagbolts; use 7/8 inch diameter flat washers on the lagbolts.

7. Secure rain flashing to wall and caulk across entirelength of top. See Figure 3.

8. For additional mounting rigidity, the return air andsupply air frames or collars can be drilled andscrewed or welded to the structural wall itself(depending upon wall construction). Be sure toobserve required clearance of combustible wall.

9. On side by side installations, maintain a minimum of20 inches clearance on right side to allow access toheat strips and control panel and to allow properairflow to the outdoor coil. Additional clearance maybe required to meet local or national codes.


NOTE: The voltage should be measured a thefield power connection point in the unitand while the unit is operating at full load(maximum amperage operating condition.)

TABLE 4OPERATING VOLTAGE RANGE

PAT EGNAR

V042 612�352

V802 781�022

TABLE 5THERMOSTAT WIRE SIZE

remrofsnarTAV ALF eguaGeriW

mumixaMecnatsiDteeFnI

55 3.2

eguag02eguag81eguag61eguag41eguag21

5406001061052

TABLE 6WALL THERMOSTAT AND SUBBASE COMBINATIONS

tatsomrehT esabbuS serutaeFetanimoderP

200-30481113F78T

300-40480221A935Q

loocegats1,taehegats1no-otua:naFlooc-ffo-taeh:metsyS

140-3048C4308T --- loocegats1,taehegats1

no-otua:naFlooc-ffo-taeh:metsyS

910-30480671C478T

210-40481001A476Q

taehegats2,loocegats1no-otua:naFlooc-otua-taeh:metsyS

120-30484391D478T

210-40481001A476Q

taehegats2,loocegats2no-otua:naFlooc-otua-taeh:metsyS

940-3048083-39F1 --- taehegats2,loocegats2

lortnocnoitalitnev/wgnimmargorpyad7cinortcelE

340-3048002-MC --- loocegats1,taehegats1

no-otua:naFlooc-ffo-taeh:metsyS

WIRING � LOW VOLTAGE WIRING230/208V, 1 phase and 3 phase equipment dual primaryvoltage transformers. All equipment leaves the factorywired on 240V tap. For 208V operation, reconnect from240V to 208V tap. The acceptable operating voltagerange for the 240 and 208V taps are:

The electrical data lists fuse and wire sizes (75ºCcopper) for all models, including the most commonlyused heater sizes. Also shown are the number of fieldpower circuits required for the various models withheaters.

The unit rating plate lists a �Maximum Time DelayRelay Fuse� or �HACR Type� circuit breaker that is tobe used with the equipment. The correct size must beused for proper circuit protection and also to assure thatthere will be no nuisance tripping due to the momentaryhigh starting current of the compressor motor.

The disconnect access door on this unit may be locked toprevent unauthorized access to the disconnect. Toconvert for the locking capability, bend the tab locatedin the bottom left hand corner of the disconnect openingunder the disconnect access panel straight out. This tabwill now line up with the slot in the door. When shut, apadlock may be placed through the hole in the tabpreventing entry. Five (5) wires should be run from thermostat subbase to

the 24V terminal board in the unit. A five conductor, 18gauge copper, color-coded thermostat cable isrecommended. The connection points are shown inFigure 10.


FIGURE 3MOUNTING INSTRUCTIONS

NOTE: It is recommended that a bead of silicone caulking beplaced behind the side mounting flanges and under the topflashing at the time of installation.

MIS-311

4 9/16


FIGURE 4WALL-MOUNTING INSTRUCTIONS

MIS-549

FIGURE 5WALL-MOUNTING INSTRUCTIONS

MIS-548

MIS-311MIS-311MIS-311

SEE FIGURE 3 � MOUNTING INSTRUCTIONS

SEE UNIT DIMENSIONS, FIGURE 1,FOR ACTUAL DIMENSIONS

SEE FIGURE 1 FORDUCT DIMENSIONS


MIS-550

FIGURE 6COMMON WALL-MOUNTING INSTALLATIONS


Side section view of supply air duct forwall mounted unit showing 1/4 inchclearance to combustible surfaces.

FIGURE 7ELECTRIC HEAT CLEARANCE

MIS-277

WARNING

WARNING � A minimum of 1/4 inch clearance must be maintained

between the supply air duct and combustible materi-als.

This is required for the first 3 feet of ducting.� It is important to insure that the 1/4 inch minimum

spacing is maintained at all points.� Failure to do this could result in overheating the

combustible material and may result in fire.


MIS-1373C

FIGURE 8LOW VOLTAGE WIRING


IMPORTANT INSTALLER NOTEFor improved start-up performance, wash the indoor coilwith a dishwasher detergent.

HIGH PRESSURE SWITCHThe WA372 models are supplied with a remote resethigh pressure switch. If tripped, this pressure switchmay be reset by turning the thermostat off then back onagain.

THREE PHASE SCROLL COMPRESSORSTART UP INFORMATIONScroll compressors, like several other types ofcompressors, will only compress in one rotationaldirection. Direction of rotation is not an issue withsingle phase compressors since they will always startand run in the proper direction.

However, three phase compressors will rotate in eitherdirection depending upon phasing of the power. Sincethere is a 50-50 chance of connecting power in such away as to cause rotation in the reverse direction,verification of proper rotation must be made. All threephase units incorporate a phase monitor to ensure properfield wiring. See the Phase Monitor section later in thismanual.

Verification of proper rotation must be made any time acompressor is change or rewired. If improper rotation iscorrected at this time there will be no negative impact onthe durability of the compressor. However, reverseoperation for over one hour may have a negative impacton the bearing due to oil pump out.

NOTE: If compressor is allowed to run in reverserotation for several minutes, the compressor'sinternal protector will trip.

All three phase ZR3 compressors are wired identicalinternally. As a result, once the correct phasing isdetermined for a specific system or installation,connecting properly phased power leads to the sameFusite terminal should maintain proper rotationdirection.

Verification of proper rotation direction is made byobserving that suction pressure drops and dischargepressure rises when the compressor is energized.Reverse rotation also results in an elevated sound levelover that with correct rotations, as well as, substantiallyreduced current draw compared to tabulated values.

START UP

PHASE MONITORAll units with three phase compressors are equippedwith a 3 phase line monitor to prevent compressordamage due to phase reversal.

The phase monitor in this unit is equipped with twoLEDs. If the Y signal is present at the phase monitorand phases are correct the green LED will light.

If phases are reversed, the red fault LED will be lit andcompressor operation is inhibited.

If a fault condition occurs, reverse two of the supplyleads to the unit. Do not reverse any of the unit factorywires as damage may occur.

SERVICE HINTS1. Caution homeowner to maintain clean air filters at all

times. Also, not to needlessly close off supply andreturn air registers. This reduces air flow through thesystem, which shortens equipment service life as wellas increasing operating costs.

2. Check all power fuses or circuit breakers to be surethey are the correct rating.

3. Periodic cleaning of the outdoor coil to permit fulland unrestricted airflow circulation is essential.

SEQUENCE OF OPERATIONCooling�Circuit R-Y makes at thermostat pulling incompressor contactor, starting the compressor andoutdoor motor. The G (indoor motor) circuit isautomatically completed on any call for coolingoperation or can be energized by manual fan switch onsubbase for constant air circulation. On all 230 volt unitsthere is a one minute off delay on the blower motor. 460volt models do not have an off delay. On a call forheating, circuit R-W1 make at the thermostat pulling inheat contact for the strip heat and blower operation. On acall for second stage heat, R-W2 makes bringing onsecond heat contactor, if so equipped.

The direction of rotation of the compressor may bechanged by reversing any two line connections to theunit.


Alarm Relay Output

Alarm terminal is output connection for applicationswhere alarm relay is employed. This terminal ispowered whenever compressor is locked out due to HPCor LPC sequences as described.

NOTE: Both high and low pressure switch controls areinherently automatic reset devices. The highpressure switch and low pressure switch cut outand cut in settings are fixed by specific airconditioner or heat pump unit model. Thelockout features, both soft and manual, are afunction of the Compressor Control Module.

ADJUSTMENTSAdjustable Delay on Make and Delay on BreakTimer

The potentiometer is used to select Delay on Break timefrom 30 seconds to 5 minutes. Delay on Make (DOM)timing on power-up and after power interruptions isequal to 2 minutes plus 10% of Delay on Break (DOB)setting:

0.5 minute (30 seconds) DOB = 123 second DOM1.0 minute (60 seconds) DOB = 126 second DOM2.0 minute (120 seconds) DOB = 132 second DOM3.0 minute (180 seconds) DOB = 138 second DOM4.0 minute (240 seconds) DOB = 144 second DOM5.0 minute (300 seconds) DOB = 150 second DOM

During routine operation of the unit with no powerinterruptions the compressor will operate on demandwith no delay.

Typical Settings for Dual Unit Installation:

Unit 1: DOB set at 2 minutes, and DOM is 132 seconds

Unit 2: DOB set at 4 minutes, and DOM is 144 seconds

PRESSURE SERVICE PORTSHigh and low pressure service ports are installed on allunits so that the system operating pressures can beobserved. Pressure tables can be found later in themanual covering all models. It is imperative to matchthe correct pressure table to the unit by model number.

COMPRESSOR CONTROL MODULEThe compressor control module is optional on themodels covered by this manual. The compressor controlis an anti-short cycle/lockout timer with high and lowpressure switch monitoring and alarm relay output.

Adjustable Delay On Make And Break Timer

On initial power up or any time power is interrupted tothe unit the delay on make period begins which will be2 minutes plus 10% of the delay on break setting. Whenthe delay on make is complete and the high pressureswitch (and low pressure switch if employed) is closed,the compressor contactor is energized. Upon shutdownthe delay or break timer starts and prevents restart untilthe delay on break and delay on make periods haveexpired.

During routine operation of the unit with no powerinterruptions the compressor will operate on demandwith no delay.

High Pressure Switch and Lockout Sequence

If the high pressure switch opens, the compressorcontactor will de-energize immediately. The lockouttimer will go into a soft lockout and stay in soft lockoutuntil the high pressure switch closes and the delay onbreak time has expired. If the high pressure switchopens again in this same operating cycle the unit will gointo manual lockout condition and the alarm relay circuitwill energize. Recycling the wall thermostat resets themanual lockout.

Low Pressure Switch, Bypass, and LockoutSequence

If the low pressure switch opens for more than 120seconds, the compressor contactor will de-energize andgo into a soft lockout. Regardless the state of the lowpressure switch, the contactor will reenergize after thedelay on make time delay has expired. If the lowpressure switch remains open, or opens again for longerthan 120 seconds the unit will go into manual lockoutcondition and the alarm relay circuit will energize.Recycling the wall thermostat resets the manual lockout.


TROUBLESHOOTING

The suction line temperatures in Table 8 are based upon80ºF dry bulb/67ºF wet bulb (50 percent R.H.)temperature and rated airflow across the evaporatorduring cooling cycle.

REMOVAL OF FAN SHROUD1. Disconnect all power to unit.2. Remove the screws holding both grills � one on each

side of unit � and remove grills.3. Remove screws holding fan shroud to condenser and

bottom � 9 screws.4. Unwire condenser fan motor.5. Slide complete motor, fan blade, and shroud assembly

out the left side of the unit.6. Service motor/fan as needed.7. Reverse steps to reinstall.

REFRIGERANT CHARGEThe correct system R-22 charge is shown on the unitrating plate. Optimum unit performance will occur witha refrigerant charge resulting in a suction linetemperature(6 inches from compressor) as shown in Table 8.

"A"

AIRFLOW

TABLE 8SUCTION LINE TEMPERATURES

sledoMdetaRwolfriA

F°59.pmeTDO

F°28.pmeTDO

203AW 000,1 95�65 66�46

273AW 001,1 95�75 46�26

TABLE 9INDOOR BLOWER PERFORMANCE

CFM AT 230 VOLTS

.P.S.EHnI 2O

273AW,203AW

deepShgiH deepSwoL

lioCyrD lioCteW lioCyrD lioCteW

0. 593,1 513,1 059 539

1. 043,1 072,1 039 519

2. 582,1 091,1 019 588

3. 502,1 001,1 558 038

4. 011,1 000,1 008 557

5. 500,1 078 --- ---

TABLE 11MAXIMUM ESP OF OPERATION

ELECTRIC HEAT ONLY

ledoM teltuOtnorF teltuOpoT

deepS woLdeepS

hgiHdeepS

woLdeepS

hgiHdeepSWK

Z0A50A80A01A51A

05.05.05.54.53.

05.05.05.05.04.

05.54.---53.---

05.05.---05.---

Z0B60B90B51B

05.04.05.03.

05.05.05.54.

05.---04.---

05.---54.---

Z0C60C90C51C

05.05.04.53.

05.05.05.54.

05.---04.---

05.---54.---

TABLE 10RATED CFM AND ESP

1 Rated CFM and ESP on high speed tap

ledoM

1

detaRMFC

1

detaRPSE

dednemmoceRegnaRwolfriA

203AW 000,1 04. 003,1– 039

273AW 001,1 03. 053,1–039

FIGURE 9FAN BLADE SETTING

FAN BLADE SETTING DIMENSIONSShown in the drawing below are the correct fan bladesetting dimensions for proper air delivery across theoutdoor coil.

Any service work requiring removal or adjustment in thefan and/or motor area will require that the dimensionsbelow be checked and blade adjusted in or out on themotor shaft accordingly.

TABLE 7FAN BLADE DIMENSION

ledoM AnoisnemiD

203AW273AW 52.1


j

Low side pressure ± 2 psig

High side pressure ± 5 psig

Tables are based upon rated CFM (airflow) across the evaporator coil and should be found undersection titled "Refrigerant Charge" elsewhere in manual. If there is any doubt as to correct charge beingin the system, the charge should be removed, system evacuated and recharged to serial plate instruc-tions.

TABLE 12COOLING PRESSURE

Outdoor Temperature °F

ledoMriAnruteRerutarepmeT erusserP 57 08 58 09 59 001 501 011 511

203AW

BDged57BWged26

ediSwoLediShgiH

57512

67922

87442

97852

08572

18292

38803

48723

58543

BDged08BWged76

ediSwoLediShgiH

08022

18532

38052

58562

68282

78992

98613

09533

19453

BDged58BWged27

ediSwoLediShgiH

38822

48342

68952

88472

98292

09903

29723

39743

49663

273AW

BDged57BWged26

ediSwoLediShgiH

96002

07412

27922

47542

57162

77972

87692

97613

97533

BDged08BWged76

ediSwoLediShgiH

57502

57912

77532

97152

08862

28682

38403

48423

58443

BDged58BWged27

ediSwoLediShgiH

77212

87722

08342

28062

38772

58892

68513

78533

88853


1 These heater packages not suitable for installation in top outlet models.

NOTE: Top outlet models are available only as factory built.

WA

302-

AW

A37

2-A

WA

302-

B

WA

372-

B

WA

302-

CW

A37

2-C

TABLE 13OPTIONAL ACCESSORIES

LEDOM NOITPIRCSED3-POB etalPffOknalB X X X X

3-DAFB repmaDriAhserFcirtemoraB X X X X3-DAFM repmaDriAhserFdezirotoM X X X X

3-VRC tsuahxEhtiwrotalitneVlaicremmoC X X X XB3-MFIE tsuahxEhtiwrezimonocE X X X

B3A-VREW rotalitneVyrevoceRygrenE X X XB3A-VREW rotalitneVyrevoceRygrenE X

6-AMC lortnoCtneibmAwoL X X XA61-AMC lortnoCerusserPwoL X X X XA81-AMC CPL+CAL X X X

51-CMC tiKtratS X50A-30AWHE egakcaPretaeH 1 X80A-30AWHE egakcaPretaeH 1 X01A-30AWHE egakcaPretaeH 1 X51A-30AWHE egakcaPretaeH 1 X60B-30AWHE egakcaPretaeH 1 X X90B-30AWHE egakcaPretaeH 1 X X51B-30AWHE egakcaPretaeH 1 X51B-73AWHE egakcaPretaeH 1 X60C-30AWHE egakcaPretaeH 1 X90C-30AWHE egakcaPretaeH 1 X21C-30AWHE egakcaPretaeH 1 X51C-30AWHE egakcaPretaeH 1 X

A50-BCMW tiKrekaerBtiucriC XB20-BCMW tiKrekaerBtiucriC XB30-BCMW tiKrekaerBtiucriC XC10-DPMW tiKtcennocsiDelggoT X

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WALL MOUNTED PACKAGED INSTALLATION AIR ......Manual 2100-404 Page 5 FILTERS A 1 inch throw away filter is suppled with each unit. The filter slides into position making it easy to