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FOR THE RHEEM H2AC ROOFTOP UNIT FEATURING eSYNC™ INTEGRATION TECHNOLOGYRLHL-C SERIES 10 TON [35.2 kW]
92-23577-120-00[ ] Designates Metric Conversions
THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALI-FIED, LICENSED SERVICE PERSONNEL FOR PROPER INSTALLA-TION, ADJUSTMENT AND OPERATION OF THIS UNIT. READTHESE INSTRUCTIONS THOROUGHLY BEFORE ATTEMPTINGINSTALLATION OR OPERATION. FAILURE TO FOLLOW THESEINSTRUCTIONS MAY RESULT IN IMPROPER INSTALLATION,ADJUSTMENT, SERVICE OR MAINTENANCE POSSIBLY RESULT-ING IN FIRE, ELECTRICAL SHOCK, PROPERTY DAMAGE, PER-SONAL INJURY OR DEATH.
WARNING!
DO NOT DESTROYPLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE
FOR FUTURE REFERENCE.
INSTALLATION INSTRUCTIONS
Recognize this symbol as an indication of Important Safety Information!!
ISO 9001:2008
Featuring IndustryStandard R-410A
INTEGRATION TECHNOLOGY
I. TABLE OF CONTENTSI. Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2II. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2III. Checking Product Received . . . . . . . . . . . . . . . . . . . . . 2IV. Equipment Protection . . . . . . . . . . . . . . . . . . . . . . . . . . 2V. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B. Major Components . . . . . . . . . . . . . . . . . . . . . . . . 3C. R-410A Refrigerant. . . . . . . . . . . . . . . . . . . . . . . . 3
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Heater Kit Characteristics . . . . . . . . . . . . . . . . . . . . . . . 9Gross Systems Performance Data . . . . . . . . . . . . . . . 10Water Heater Performance Data . . . . . . . . . . . . . . . . . 11
VI. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12A. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121. Pre-Installation Check Points . . . . . . . . . . . . . . . 122. Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
B. Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12C. H2AC Rooftop Unit Special Considerations. . . . . . . . 12D. Rooftop Installation . . . . . . . . . . . . . . . . . . . . . . . . . 13
VII. Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14VIII. Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14IX. Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14X. Electrical Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
A. Power Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15B. Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15C. Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15D. Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15E. Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
XI. Indoor Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . . 15XII. Crankcase Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15XIII. Water Connections and Start Up for Potable
Water Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15A. Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15B. System Pressure Test and Start Up . . . . . . . . . . . . 16
XIV. Lime and Scale Flushing Procedure . . . . . . . . . . . . . . 20XV. Pre-Start Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21XVI. Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21XVII. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21XVIII. H2AC Rooftop Unit Sequence of Operation. . . . . . . . . 22XIX. Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22XX. Airflow Data Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . 23XXI. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24XXII. H2AC Rooftop Unit Unit Alarms and
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25XXIII. Wiring Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . 26-29XXIV. Charge Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
II. INTRODUCTION
THE MANUFACTURER’S WARRANTY DOES NOT COVERANY DAMAGE OR DEFECT TO THE AIR CONDITIONERCAUSED BY THE ATTACHMENT OR USE OF ANY COMPO-NENTS, ACCESSORIES OR DEVICES (OTHER THANTHOSE AUTHORIZED BY THE MANUFACTURER) INTO,ONTO OR IN CONJUNCTION WITH THE AIR CONDITION-ER. YOU SHOULD BE AWARE THAT THE USE OF UNAU-THORIZED COMPONENTS, ACCESSORIES OR DEVICESMAY ADVERSELY AFFECT THE OPERATION OF THE AIRCONDITIONER AND MAY ALSO ENDANGER LIFE ANDPROPERTY. THE MANUFACTURER DISCLAIMS ANYRESPONSIBILITY FOR SUCH LOSS OR INJURY RESULT-ING FROM THE USE OF SUCH UNAUTHORIZED COMPO-NENTS, ACCESSORIES OR DEVICES.
This booklet contains the installation and operating instructionsfor your air conditioner. There are a few precautions thatshould be taken to derive maximum satisfaction from it.Improper installation can result in unsatisfactory operation ordangerous conditions.
Read this booklet and any instructions packaged with separateequipment required to make up the system prior to installation.Give this booklet to the owner and explain its provisions. Theowner should retain this booklet for future reference.
III. CHECKING PRODUCT RECEIVEDUpon receiving the unit, inspect it for any damage from ship-ment. Claims for damage, either shipping or concealed, shouldbe filed immediately with the shipping company. Check the unitmodel number, heating size, electrical characteristics, andaccessories to determine if they are correct.
IV. EQUIPMENT PROTECTIONIV. FROM THE ENVIRONMENTThe metal parts of this unit may be subject to rust or deteriora-tion in adverse environmental conditions. This oxidation couldshorten the equipment’s useful life. Salt spray, fog or mist inseacoast areas, sulphur or chlorine from lawn watering sys-tems, and various chemical contaminants from industries suchas paper mills and petroleum refineries are especially corro-sive.
If the unit is to be installed in an area where contaminantsare likely to be a problem, special attention should begiven to the equipment location and exposure.
1. Avoid having lawn sprinkler heads spray direction on theunit cabinet.
2. In coastal areas, locate the unit on the side of the buildingaway from the waterfront.
3. Shielding provided by a fence or shrubs may give someprotection.
Regular maintenance will reduce the buildup of contami-nants and help to protect the unit’s finish.
DISCONNECT ALL POWER TO THE UNIT BEFORE START-ING MAINTENANCE. FAILURE TO DO SO CAN RESULT INSEVERE ELECTRICAL SHOCK OR DEATH.
1. Frequent washing of the cabinet, fan blade and coil withfresh water will remove most of the salt or other contami-nants that build up on the unit.
2. Regular cleaning and waxing of the cabinet with a goodautomobile polish will provide some protection.
3. A good liquid cleaner may be used several times a year toremove matter that will not wash off with water.
Several different types of protective coatings are offered insome areas. These coatings may provide some benefit, but theeffectiveness of such coating materials cannot be verified bythe equipment manufacturer.
The best protection is frequent cleaning, maintenance andminimal exposure to contaminants.
V. SPECIFICATIONSA. GENERALThe H2AC Rooftop Unit with optional Electric Heat is available witha Cooling capacity of 10 nominal tons and optional 10, 15, 20, 30,40, or 50 kW of electric heat.
Potable water heating capacities range from approximately 120,000BTUH to 168,000 BTUH depending on water temperature, indoor airtemperatures, and indoor CFM.
Units are designed for downflow-only supply and return air and areweatherized and intended for outdoor installation.
2
WARNING!
WARNING!
2. Quick Reference Guide For R-410A
• R-410A refrigerant operates at approximately 60% higherpressure (1.6 times) than R-22. Ensure that servicing equip-ment is designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A, as with other HFC’s is only compatible with POEoils.
• Vacuum pumps will not remove moisture from POE oil.
• R-410A systems are to be charged with liquid refrigerants.Prior to March 1999, R-410A refrigerant cylinders had a diptube. These cylinders should be kept upright for equipmentcharging. Post March 1999 cylinders do not have a dip tubeand should be inverted to ensure liquid charging of theequipment.
• Do not install a suction line filter drier in the liquid line.
• A liquid line filter drier is standard on every unit.
• Desiccant (drying agent) must be compatible for POE oilsand R-410A.
3. Evaporator Coil / TXV
The thermostatic expansion valve is specifically designed tooperate with R-410A. DO NOT use an R-22 TXV. The exist-ing evaporator must be replaced with the factory specifiedTXV evaporator specifically designed for R-410A.
4. Tools Required For Installing & Servicing R-410A Models
Manifold Sets:-Up to 800 PSIG High side-Up to 250 PSIG Low Side-550 PSIG Low Side Retard
Manifold Hoses:-Service Pressure Rating of 800 PSIG
Recovery Cylinders:-400 PSIG Pressure Rating-Dept. of Transportation 4BA400 or BW400
R-410A systems operate at higher pressures than R-22 sys-tems. Do not use R-22 service equipment or components on R-410A equipment.
3
CAUTION!
Since the H2AC Rooftop Unit only functions during the coolingmode, the unit should be installed to serve the area of the structurehaving the largest cooling run-time load, for instance the kitchenarea of the restaurant, in order to provide the greatest water heatingand energy saving benefits.
The information on the rating plate is in compliance with theFTC and DOE rating for single phase units. The following infor-mation is for three phase units which are not covered underthe DOE certification program.
1. The efficiency rating of this unit is a product thermal effi-ciency rating determined under continuous operating condi-tions independent of any installed system.
B. MAJOR COMPONENTSThe unit includes a hermetically-sealed refrigerating system(consisting of a compressor, evaporator coil with thermalexpansion valve), a circulation air blower, a condenser fan, arefrigerant to air heat exchanger assembly, a refrigerant towater heat exchanger assembly, 3-way valve, two solenoidvalves, and all necessary internal electrical wiring. The coolingsystem of these units is factory-evacuated, charged and perfor-mance tested. Refrigerant amount and type are indicated onrating plate.
C. R-410A REFRIGERANTAll units are factory charged with R-410A refrigerant.
1. Specification of R-410A:
Application: R-410A is not a drop-in replacement for R-22;equipment designs must accommodate its higher pressures. Itcannot be retrofitted into R-22 units.
Pressure: The pressure of R-410A is approximately 60%(1.6 times) greater than R-22. Recovery and recycle equip-ment, pumps, hoses and the like need to have design pressureratings appropriate for R-410A. Manifold sets need to range upto 800 psig high-side and 250 psig low-side with a 550 psiglow-side retard. Hoses need to have a service pressure ratingof 800 psig. Recovery cylinders need to have a 400 psig ser-vice pressure rating. DOT 4BA400 or DOT BW400.
Combustibility: At pressures above 1 atmosphere, mixture ofR-410A and air can become combustible. R-410A and airshould never be mixed in tanks or supply lines, or beallowed to accumulate in storage tanks. Leak checkingshould never be done with a mixture of R-410A and air.Leak checking can be performed safely with nitrogen or a mix-ture of R-410A and nitrogen.
4
Unit DimensionsIMPORTANT: THIS UNIT MUST BE MOUNTED LEVEL IN BOTH DIRECTIONS TO ALLOW WATER TO DRAIN FROM THE CON-DENSER SECTION AND CONDENSATE PAN.
ST-A1190-10
FIG
UR
E 1
UN
IT D
IME
NS
ION
S
5
ST-A1190-11
FIG
UR
E 2
UN
IT D
IME
NS
ION
S
23-7/8”[606.4 mm]
REF.
24”[609.6 mm]
REF.
41-1/16”[1044.5 mm]
REF.
6-13/16”[173 mm]
REF.
1-7/8”[47.6 mm]
TYP.
1-7/8”[47.6 mm]
TYP.
53-7/32”[1359.7 mm]
REF.
49-7/8”[1266.8 mm]
REF.
1-7/8”[47.6 mm]
TYP.
88-9/16”[2249.5 mm]
REF.
20-13/16[528.6 mm]
REF.
29-3/4”[755.7 mm]
REF.
20-13/16”[528.6 mm]
REF.1-7/8”[47.6 mm]
TYP.
S
GASKET
FIGURE 3
ST-A1190-11
6
GENERAL DATA - RLHL
NOM. SIZE 10 TON [35.2 kW]
Model RLHL-Series C120CL C120CM C120DL C120DMCooling Performance1
Gross Cooling Capacity Btu [kW] 119,000 [34.87] 119,000 [34.87] 119,000 [34.87] 119,000 [34.87]EER/SEER2 11.25/NA 11.25/NA 11.25/NA 11.25/NANominal CFM/AHRI Rated CFM [L/s] 4000/3600 [1888/1699] 4000/3600 [1888/1699] 4000/3600 [1888/1699] 4000/3600 [1888/1699]AHRI Net Cooling Capacity Btu [kW] 115,000 [33.69] 115,000 [33.69] 115,000 [33.69] 115,000 [33.69]Net Sensible Capacity Btu [kW] 85,300 [24.99] 85,300 [24.99] 85,300 [24.99] 85,300 [24.99]Net Latent Capacity Btu [kW] 29,700 [8.7] 29,700 [8.7] 29,700 [8.7] 29,700 [8.7]IEER3 11.9 11.9 11.9 11.9Net System Power kW 10.2 10.2 10.2 10.2
CompressorNo./Type 1/Scroll 1/Scroll 1/Scroll 1/Scroll
Outdoor Sound Rating (dB)5 88 88 88 88Outdoor Coil—Fin Type Louvered Louvered Louvered LouveredTube Type MicroChannel MicroChannel MicroChannel MicroChannelTube Size in. [mm] OD 1 [25.4] 1 [25.4] 1 [25.4] 1 [25.4]Face Area sq. ft. [sq. m] 27 [2.51] 27 [2.51] 27 [2.51] 27 [2.51]Rows / FPI [FPcm] 1 / 23 [9] 1 / 23 [9] 1 / 23 [9] 1 / 23 [9]
Indoor Coil—Fin Type Louvered Louvered Louvered LouveredTube Type Rifled Rifled Rifled RifledTube Size in. [mm] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]Face Area sq. ft. [sq. m] 13.5 [1.25] 13.5 [1.25] 13.5 [1.25] 13.5 [1.25]Rows / FPI [FPcm] 2 / 22 [9] 2 / 22 [9] 2 / 22 [9] 2 / 22 [9]Refrigerant Control Tx Valves Tx Valves Tx Valves Tx ValvesDrain Connection No./Size in. [mm] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4] 1/1 [25.4]
Outdoor Fan—Type Propeller Propeller Propeller PropellerNo. Used/Diameter in. [mm] 2/24 [609.6] 2/24 [609.6] 2/24 [609.6] 2/24 [609.6]Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1CFM [L/s] 8400 [3964] 8400 [3964] 8400 [3964] 8400 [3964]No. Motors/HP 2 at 1/3 HP 2 at 1/3 HP 2 at 1/3 HP 2 at 1/3 HPMotor RPM 1075 1075 1075 1075
Indoor Fan—Type FC Centrifugal FC Centrifugal FC Centrifugal FC CentrifugalNo. Used/Diameter in. [mm] 1/15x15 [381x381] 1/15x15 [381x381] 1/15x15 [381x381] 1/15x15 [381x381]Drive Type/No. Speeds Belt/Variable Belt/Variable Belt/Variable Belt/VariableNo. Motors 1 1 1 1Motor HP 2 3 2 3Motor RPM 1725 1725 1725 1725Motor Frame Size 56 56 56 56
Potable Water Heat RecoveryHeat Exchanger Type Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate Vented Double-Wall Flat PlateMaterial Cu Brazed Stainless Steel Cu Brazed Stainless Steel Cu Brazed Stainless Steel Cu Brazed Stainless SteelNo. Flat Plates 25 25 25 25Unit Water Connections No./Size in. [mm] 2/1.625 [41.3] 2/1.625 [41.3] 2/1.625 [41.3] 2/1.625 [41.3]
Water Pump - Type Centrifugal Centrifugal Centrifugal CentrifugalDrive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1Housing Material Stainless Steel Stainless Steel Stainless Steel Stainless SteelGPM [L/s] 30 [1.89] 30 [1.89] 30 [1.89] 30 [1.89]Head Pressure ft. H2O [kPa] 25 [74.7] 25 [74.7] 25 [74.7] 25 [74.7]Motor HP 1/3 1/3 1/3 1/3Motor RPM 3450 3450 3450 3450
Filter—Type Disposable Disposable Disposable DisposableFurnished Yes Yes Yes Yes(No.) Size Recommended in. [mm x mm x mm] (6)2x18x18 [51x457x457] (6)2x18x18 [51x457x457] (6)2x18x18 [51x457x457] (6)2x18x18 [51x457x457]
Refrigerant Charge Oz. [g] 217.6 [6169] 217.6 [6169] 217.6 [6169] 217.6 [6169]WeightsNet Weights lbs. [kg] 984 [446] 992 [450] 984 [446] 992 [450]Ship Weights lbs. [kg] 1021 [463] 1029 [467] 1021 [463] 1029 [467]
CONTINUED
7
NOTES:1. Cooling Performance is rated at 95°F ambient, 80°F entering dry bulb, 67°F entering wet bulb. Gross capacity does not include the effect of fan motor heat. AHRI capacity is net and includes the effect of fan motorheat. Units are suitable for operation to ±20° of nom cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment certification program, which is based on AHRI Stanard 340/360.
2. EER and/or SEER are rated at AHRI conditions and in accordance with DOE test procedures.3. IEER is rated in accordance with AHRI Standard 340/360.4. Outdoor Sound Rating shown is tested in accordance with AHRI Standard 270.
ELECTRICAL DATA - RLHL
Unit Information
ELECTRICAL DATA - RLHL SERIES
C120DLC120CL C120CM C120DMCompressor Motor
Condenser Motor
Evaporator Fan
Unit Operating VoltageRange
Volts
Minimum CircuitAmpacity
Minimum OvercurrentProtection Device Size
Maximum OvercurrentProtection Device Size
No.
Volts
Phase
RPM
HP, Compressor 1
Amps (RLA), Comp. 1
Amps (LRA), Comp. 1
No.
Volts
Phase
HP
Amps (FLA, each)
Amps (LRA, each)
No.
Volts
Phase
HP
Amps (FLA, each)
Amps (LRA, each)
Water Pump
No.
Volts
Phase
HP
Amps (FLA, each)
Amps (LRA, each)
187-253 187-253 414-506 414-506
208/230 208/230 460 460
61/61 66/66 35 35
60/60 70/70 35 35
90/90 100/100 50 50
1 1 1 1
200/240 200/240 480 480
3 3 3 3
3450 3450 3450 3450
10 10 10 10
37.1/37.1 37.1/37/1 20.9 20.9
225/225 225/225 114 114
2 2 2 2
208/230 208/230 460 460
1 1 1 1
1/3 1/3 1/3 1/3
2.4/2.4 2.4/2.4 1.4 1.4
4.7/4.7 4.7/4.7 2.4 2.4
1 1 1 1
208/230 208/230 460 460
3 3 3 3
2 3 2 3
8/8 13/13 4 7
56/56 56/56 28 38.1
1 1 1 1
208/230 208/230 208/230 208/230
1 1 1 1
1/3 1/3 1/3 1/3
1.7 1.7 1.7 1.7
5.1 5.1 5.1 5.1
8
9
HEATER KIT CHARACTERISTICSAUXILIARY HEATER KITS CHARACTERISTICS AND APPLICATION (RLHL MODELS)
RLHL-C120CL No Heat — — — — 61/61 60/90 60/90 — — 61/61 60/90 60/90CC10C 1 7.2/9.6 24.56/32.75 20/23.1 61/61 70/90 70/90 25/29 25/30 61/61 60/90 60/90CC15C 1 10.8/14.4 36.84/49.13 30/34.6 61/61 70/90 70/90 38/44 40/45 61/61 60/90 60/90CC20C 1 14.4/19.2 49.13/65.5 40/46.2 61/68 70/90 70/90 50/58 50/60 61/61 60/90 60/90CC30C 1 21.6/28.8 73.69/98.25 60/69.3 85/97 90/90 100/100 75/87 80/90 61/61 60/90 60/90CC40C 1 28.8/38.4 98.25/131 80.1/92.4 111/126 125/125 150/150 101/116 110/125 61/61 60/90 60/90CC50C 1 36.1/48 123.16/163.75 100.1/115.5 136/155 150/150 175/175 126/145 150/150 61/61 60/90 60/90
RLHL-C120CM No Heat — — — — 66/66 70/100 70/100 — — 66/66 70/100 70/100CC10C 1 7.2/9.6 24.56/32.75 20/23.1 66/66 80/100 80/100 25/29 25/30 66/66 70/100 70/100CC15C 1 10.8/14.4 36.84/49.13 30/34.6 66/66 80/100 80/100 38/44 40/45 66/66 70/100 70/100CC20C 1 14.4/19.2 49.13/65.5 40/46.2 67/75 80/100 80/100 50/58 50/60 66/66 70/100 70/100CC30C 1 21.6/28.8 73.69/98.25 60/69.3 92/103 100/100 110/110 75/87 80/90 66/66 70/100 70/100CC40C 1 28.8/38.4 98.25/131 80.1/92.4 117/132 125/125 150/150 101/116 110/125 66/66 70/100 70/100CC50C 1 36.1/48 123.16/163.75 100.1/115.5 142/161 150/150 175/175 126/145 150/150 66/66 70/100 70/100
208/240 VOLT, THREE PHASE, 60 HZ, AUXILIARY ELECTRIC HEATER KITS CHARACTERISTICS AND APPLICATION
Single Power Supply for Both Unit and Heater Kit Separate Power Supply for Both Unit and Heater Kit
Heater Kit Air Conditioner Heater Kit Air Conditioner
Over Current ProtectiveDevice Size
Over Current ProtectiveDevice Size
RHEEMModelNumber
RXJJ- Heater KitNominal
kW
No. ofSequenceSteps
RatedHeaterkW @
208/240 V
HeaterKBTU/Hr @208/240 V
HeaterAmp. @208/240 V
Unit Min.Ckt.
Ampacity @208/240 V
Min. Ckt.Ampacity208/240V
Max. FuseSize
208/240V
Min. CircuitAmpacity208/240V Min./Max.
@ 208 VMin./Max.@ 240 V
Min./Max.@ 208 V
Min./Max.@ 240 V
RLHL-C120DL No Heat — — — — 35 35/50 — — — 35 35/50 —CC10D 1 9.6 32.75 11.5 35 40/50 — 15 15 35/35 35/50 0/50CC15D 1 14.4 49.13 17.3 35 40/50 — 22 25 35/35 35/50 0/50CC20D 1 19.2 65.5 23.1 35 40/50 — 29 30 35/35 35/50 0/50CC30D 1 28.8 98.25 34.6 49 50/50 — 44 45 35/35 35/50 0/50CC40D 1 38.4 131 46.2 63 70/70 — 58 60 35/35 35/50 0/50CC50D 1 48 163.75 57.7 78 80/80 — 73 80 35/35 35/50 0/50
RLHL-C120DM No Heat — — — — 38 35/50 — — — 38 35/50 —CC10D 1 9.6 32.75 11.5 38 45/50 — 15 15 38/38 35/50 0/50CC15D 1 14.4 49.13 17.3 38 45/50 — 22 25 38/38 35/50 0/50CC20D 1 19.2 65.5 23.1 38 45/50 — 29 30 38/38 35/50 0/50CC30D 1 28.8 98.25 34.6 52 60/60 — 44 45 38/38 35/50 0/50CC40D 1 38.4 131 46.2 67 70/70 — 58 60 38/38 35/50 0/50CC50D 1 48 163.75 57.7 81 90/90 — 73 80 38/38 35/50 0/50
480 VOLT, THREE PHASE, 60 HZ, AUXILIARY ELECTRIC HEATER KITS CHARACTERISTICS AND APPLICATION
Single Power Supply for Both Unit and Heater Kit Separate Power Supply for Both Unit and Heater Kit
Heater Kit Air Conditioner Heater Kit Air Conditioner
Over Current ProtectiveDevice Size
Over Current ProtectiveDevice Size
RHEEMModelNumber
RXJJ- Heater KitNominal
kW
No. ofSequenceSteps
RatedHeaterkW @480 V
HeaterKBTU/Hr @
480 V
HeaterAmp. @480 V
Unit Min.Ckt.
Ampacity @480 V
Min. Ckt.Ampacity480V
Max. FuseSize480V
Min. CircuitAmpacity480V Min./Max.
@ 480 VMin./Max.@ 480 V
Min./Max.@ 480 V
Min./Max.@ 480 V
GROSS SYSTEMS PERFORMANCE DATA — RLHL-C120ENTERING INDOOR AIR @ 80°F [26.7°C] dbE �
10
DR — Depression ratio Total — Total capacity x 1000 BTUH NOTES: ➀ When the entering air dry bulb is other than 80°F [27°C], adjust the sensibledbE — Entering air dry bulb Sens — Sensible capacity x 1000 BTUH NOTES: ➀ capacity from the table by adding [1.10 x CFM x (1 – DR) x (dbE – 80)].wbE — Entering air wet bulb Power — KW input
[ ] Designates Metric Conversions
11
WA
TE
R H
EA
TIN
G P
ER
FO
RM
AN
CE
DA
TA -
C12
0
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12
VI. INSTALLATIONA. GENERAL
1. PRE-INSTALLATION CHECK-POINTS
Before attempting any installation, the following pointsshould be carefully considered:
a. Structural strength of supporting members.(rooftop installation)
b. Clearances and provision for servicing.
c. Power supply and wiring.
d. Air duct connections.
e. Drain facilities and connections.
f. Location for minimum noise.
2. LOCATIONThese units are designed for outdoor installations. Theycan be mounted on rooftop. They are not to be installedwithin any part of a structure such as an attic, crawlspace, closet, or any other place where condenser airflow is restricted or other than outdoor ambient condi-tions prevail. Since the application of the units is of theoutdoor type, it is important to consult your local codeauthorities at the time the first installation is made.
B. H2AC ROOFTOP UNIT SPECIAL CONSIDERATIONSSince the H2AC Rooftop unit only functions during the coolingmode, the unit should be installed to serve the area of thestructure having the largest cooling run-time, for instance thekitchen area of a restaurant, in order to provide the greatestwater heating and energy saving benefits.
The H2AC Rooftop unit is equipped with an outdoor tempera-ture sensor that energizes the water pump continuously below35°F to minimize the chance of the water system freezing,however this is not intended to be the sole method of unitfreeze protection. If the H2AC Rooftop unit is installed in ageographic location where freezing temperature canoccur, the water lines, valves, and couplings connectedoutside the unit must be adequately protected with insula-tion and heat tape suitable for the lowest expected temper-atures.
Alternately, the unit and all connecting lines can bedrained of water and the unit heat exchanger, pump, and
internal piping winterized using a non-toxic recreationalvehicle type of anti-freeze suitable for potable water sys-tems.
The H2AC Rooftop unit is equipped with a water leak sensordesigned to sense water that would accumulate in the panunder the water pump and refrigerant-to-water heat exchangerassembly located on the blower deck. If a leak is sensed in thatarea an alarm is triggered on the RTU-C (ClearControl) controlboard and a water shutoff relay is energized to activate theoptional RXMV-AH electric water shut-off valve. It is stronglyrecommended that the RXMV-AH be installed to minimize thechance of water damage to the structure in case of a waterleak in the unit.
C. CLEARANCESThe following minimum clearances must be observed forproper unit performance and serviceability. See Figure 4.
A
B
D
C
E
FIGURE 4ROOFTOP INSTALLATION
ST-A1190-10
RecommendedClearance Location
48” [1219.2 mm] A - Front
18” [457.2 mm] B - Condenser Coil
18” [457.2 mm] C - Duct Side
18”* [457.2 mm] D - Evaporator End
60” [1524 mm] E - Above
*Without Economizer. 48” [1219.2 mm] With*Economizer
13
D. ROOFTOP INSTALLATION1. Before locating the unit on the roof, make sure that thestrength of the roof and beams is adequate at that pointto support the weight involved. This is very importantand user’s responsibility.
2. For rigging and roofcurb details, see Figures 5 and 6.Use field-furnished spreaders.
3. For roofcurb assembly, see Roofcurb Installation Instruc-tions.
4. If the roofcurb is not used, provisions for disposing ofcondensate water runoff must be provided.
5. The unit should be placed on a solid and level roofcurbor platform of adequate strength. See Figure 7.
6. The location of the unit on the roof should be such as toprovide proper access for inspection and servicing.
IMPORTANT: If unit will not be put into service immediately,cover supply and return openings to prevent excessive con-densation.
FIGURE 5RIGGING FOR LIFTING
ST-A1190-04
CORNER WEIGHTS BY PERCENTAGE
A B C D
29% 29% 21% 26%
FIGURE 6ROOFCURB INSTALLATION
A
B
C
D
LIFTING BEAM
CABLE OR CHAIN
SPREADER BAR
5/8” SHAKLE EACH CORNER
ST-A1190-05
14
VII. DUCTWORKDuctwork should be fabricated by the installing contractor inaccordance with local codes and NFPA90A. Industry manualsmay be used as a guide when sizing and designing the ductsystem - contact Air Conditioning Contractors of America, 1513
16th St. N.W., Washington, D.C. 20036.
DO NOT, UNDER ANY CIRCUMSTANCES, CONNECTRETURN DUCTWORK TO ANY OTHER HEAT PRODUCINGDEVICE SUCH AS A FIREPLACE INSERT, STOVE, ETC.UNAUTHORIZED USE OF SUCH DEVICES MAY RESULT INFIRE, CARBON MONOXIDE POISONING, EXPLOSION,PROPERTY DAMAGE, SEVERE PERSONAL INJURY ORDEATH.
The unit should be placed as close to the space to be air condi-tioned as possible allowing clearance dimensions as indicated.Ducts should be run as directly as possible to supply andreturn outlets. Use of non-flammable waterproof flexible con-nectors on both supply and return connections at the unit toreduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure ifthe registers or diffusers are located on the wall or in the ceil-ing.
On ductwork exposed to outside air conditions of temperatureand humidity, use a minimum of 2" [50.8 mm] of insulation anda vapor barrier. Distribution system in attic, furred space orcrawl space should be insulated with at least 2" [50.8 mm] ofinsulation with vapor barrier. One-half to 1" [25.4 mm] thick-ness of insulation is usually sufficient for ductwork inside the air
conditioned space.
Balancing dampers should be provided for each branch duct inthe supply system. Ductwork should be properly supportedfrom the structure.
When installing ductwork, consider the following items:
1. Noncombustible flexible connectors should be usedbetween ductwork and unit to reduce noise and vibrationtransmission into the ductwork.
2. When auxiliary heaters are installed, use noncombustibleflexible connectors and clearance to combustible materialof 0" [0 mm] for the first 3 feet [.91 m] of discharge duct.Clearance to unit top and side is 0" [0 mm].
VIII. FILTERSThis unit is provided with 6 - 2" x 18" x 18" [51mm x 457 mm x457 mm] disposable filters. When replacing filters, ensure theyare inserted fully to the back to prevent bypass.
IX. CONDENSATE DRAINIMPORTANT: Install a condensate trap to ensure propercondensate drainage. See Figure 8.The condensate drain pan has a threaded female 1 inch NPT(11.5 TPI) connection. Consult local codes or ordinances forspecific requirements of condensate drain piping and disposal.• To use the removable drain pan feature of this unit, some ofthe condensate line joints should assembled for easyremoval and cleaning.
• Use a thin layer of Teflon tape or paste on drain pan connec-tions and install only hand tight.
• Do not over tighten drain pan connections as damage to thedrain pan may occur.
• Drain line MUST NOT block service access panels.• Drain line must be no smaller than drain pan outlet and ade-quately sized to accommodate the condensate dischargefrom the unit.
• Drain line should slope away from unit a minimum of 1/8” perfoot to ensure proper drainage.
• Drain line must be routed to an acceptable drain or outdoorsin accordance with local codes.
• Do not connect condensate drain line to a closed sewerpipe.
• Drain line may need insulation or freeze protection in certainapplications.
FIGURE 7FLAT ROOFTOP INSTALLATION, ATTIC OR DROP CEILINGDISTRIBUTION SYSTEM. MOUNTED ON ROOFCURB. CURB MUST BE LEVEL
A1112-03
WARNING!
FIGURE 8CONDENSATE DRAIN
3”[76 mm]
3”[76 mm]
X. ELECTRICAL WIRINGField wiring must comply with the National Electrical Code (CECin Canada) and local ordinances that may apply.
A. POWER WIRING1. This unit incorporates single-point electrical connectionsfor the unit and electric heat accessory.
2. It is important that proper electrical power is available tothe unit. Voltage should not vary more than 10% from thevalues marked on the unit rating plate. Phase voltagesmust be balanced within 3%.
3. Install a branch circuit disconnect within sight of the unit.Use the unit rating plate or RLNL-B Electrical Data todetermine the required size.
4. The branch circuit wire must be sized in accordance withthe National Electrical Code (C.E.C. in Canada) and localordinances that may apply using the minimum circuitampacity found on the unit rating plate.
5. Field-installed power wiring must be run through ground-ed rain-tight conduit attached to the unit power entrypanel and connected as follows:UNITS WITHOUT ELECTRIC HEAT - Connect powerwiring to the power terminal block located on the left sideof the electric heat compartment. Connect the groundwire to the adjacent ground lug.UNITS WITH FACTORY INSTALLED ELECTRIC HEAT -Connect power wiring to the power terminal block locatedon the electric heater kit. Connect the ground wire to theadjacent ground lug. DO NOT connect aluminum wiringdirectly to the electric heater terminal block. Wiring to theunit contactors is factory-connected.
6. For field installation of an electric heater kit, follow theinstructions below. Refer to the information supplied withthe kit.a. Removing screws as required, open heater accessdoor and detach adjacent power entry panel.
b. Remove wires to unit contactor (1L1, 1L2, 1L3) fromunit terminal block on the left side of the electric heatcompartment. Remove and discard the terminal blockand the adjacent ground lug.
c. Remove the heater kit block-off panel and install theheater kit in its place using 9 of the 12 screws previ-ously removed.
d. Connect the unit contactor wires (1L1, 1L2, 1L3) to thecompressor fuse block on the heater kit.
e. Re-install the power entry panel & run conduit and theproper size field wiring through the opening in thepanel.
f. Connect field wiring to the power terminal block locatedon the electric heater kit. Connect ground wire to theadjacent ground lug.
g. Connect heater kit control plug to the receptacle on thecontrol wiring harness.
h. Close heater access door and secure with screws pre-viously removed.
B. CONTROL WIRING (Class II)1. Low voltage wiring should not be run in conduit withpower wiring.
2. Control wiring is routed through the 7/8" [22 mm] hole inthe unit side panel. See Figure 10. Use a minimum #18AWG thermostat wire. For wire lengths exceeding 50'[15.24 m] use #16 AWG thermostat wire. Connect thecontrol wiring to the low voltage terminal block located onthe unit integrated control. Route wires under the controlvoltage shield. See Figure 10.
3. It is necessary that only approved thermostats be used.Please contact your distributor for part number informa-tion. See thermostat specification catalog for recommend-ed thermostat.
4. Figure 14 shows representative low voltage connectiondiagrams. Read your thermostat installation instructionsfor any special requirements for your specific thermostat.
C. INTERNAL WIRING1. A diagram of the internal wiring of this unit is located onthe inside of the control access panel and in this manual.If any of the original wiring must be replaced, the wiregauge and insulation must be the same as original wiring.Transformer is factory-wired for 230 volts on 208/230 voltmodels and must be changed for 208-volt applications.See unit wiring diagram for 208-volt wiring.
D. GROUNDING
THE UNIT MUST BE PERMANENTLY GROUNDED. AGROUNDING LUG IS PROVIDED IN THE ELECTRICHEAT ACCESS AREA FOR A GROUND WIRE. FAILURETO GROUND THIS UNIT CAN RESULT IN FIRE ORELECTRICAL SHOCK CAUSING PROPERTY DAMAGE,SEVERE PERSONAL INJURY OR DEATH.
E. THERMOSTATThe thermostat should be mounted on an inside wall aboutfive feet above the floor in a location where it will not beaffected by unconditioned air, sun, or drafts from open doorsor other sources. READ installation instructions in air condi-tioner thermostat package CAREFULLY because each hassome different wiring requirements.
XI. INDOOR AIR FLOW DATABelt-drive blower models have motor sheaves set for properCFM at a typical external static. See Tables C through G forblower performance.
XII. CRANKCASE HEAT (OPTIONAL)Crankcase heat is not required but may be desirable undercertain conditions.
XIII. WATER CONNECTIONS ANDSTART UP FOR POTABLE WATERHEATINGA. WATER PIPING1. Use of copper pipe suitable for potable water is recom-mended. Plumbing must meet applicable national andlocal plumbing and building codes.
15
WARNING!
FIGURE 9BRANCH CIRCUIT DISCONNECT LOCATION
16
2. The H2AC Rooftop unit should be installed as close to thestorage tank as possible to minimize heat loss from inter-connecting piping.
3. Use only solder, brazing, and pipe thread sealing materialsapproved for potable water systems.
4. Refer to connection diagram for typical piping, storagetank, and valve configurations.
5. It is highly recommended that the H2AC Rooftop unitbe installed with isolation/flushing valves (see illustra-tion, Webstone #40436 or similar) on the inlet and out-let water connections to facilitate required periodiclime and scale removal from the water-to-refrigerantheat exchanger.
6. Maximum equivalent length of water piping is to be inaccordance with the procedure shown in this manual.Consult the pressure loss tables for the values associatedwith the required water fittings, valves, and straight lengths.
7. Use the H2AC Rooftop Unit Water Flowrate vs. WaterPressure Drop graph to verify that total system equivalentpiping length will not result in less than the 15 GPM mini-mum flow rate.
B. SYSTEM PRESSURE TEST AND STARTB. UP1. Pressure test system complete system after all plumbingconnections are made using accepted plumbing leak testprocedures.
2. The refrigerant-to-water heat exchanger and waterpump housing will contain a small amount of non-toxicRV-type water system anti-freeze left over from the fac-tory run test. Be certain to flush the unit and all con-necting piping with fresh water prior to start up and ini-tial use.
3. Verify that air bleed valve in blower section on Hybrid unitis open during initial filling with water. Air must be bled fromthe highest point in the system. If unit installation results in
FIGURE 10
17
H2AC Rooftop Unit w/ circulation pump
18
List all piping components from the storage tank to the H2AC rooftop unitand back again. The equivalent length of straight tubing is the same as theactual length. The equivalent length of fittings are obtained from the tablebelow. Sum all of the individual component lengths to find the TotalEquivalent Length.
19
Water Flow Rate (GPM) (15 GPM minimum) 15 20 25 30
Water Velocity using 1-1/2” Nom. Type L Copper Tubing (fps) 2.71 3.61 4.51 5.41
Available Pressure Head at Unit @ 230/460 Volts (Head ft.) 30.3 23.8 16.3 7.7(psig) 13.1 10.3 7.1 3.3
Maximum Equivalent Feet of 1-1/2 Nom. Type L. Copper tubing (ft.) at 230/460V 1504 695 314 106
Available Pressure Head at Unit @ 208 Units (Head ft.) 26.8 19.5 11.3 2.2(psig) 11.6 8.4 4.9 0.9
Maximum Equivalent Feet of 1-1/2” Nom. Type L Copper Tubing (ft.) @ 208 V 1332 569 218 30
FIGURE 12ISOLATION/FLUSHING VALVE
20
a higher point than the integral air bleed valve, an addition-al valve needs to be installed at that point.
4. Start unit and verify the correct sequence of operation.
FIGURE 11ISOLATION/FLUSHING VALVE
XIV. LIME AND SCALE FLUSHINGXIV. PROCEDUREPeriodic flushing is required for the refrigerant-to-water heatexchanger contained in the Rheem H2AC Rooftop Unit toremove lime and scale buildup and to prevent degradation ofwater heating performance. How often this is required dependson the hardness of the water in your area and the run time inthe water heating mode. The below instructions provide a safeand effective means of removing the lime and scale buildup inthe heat exchanger. If you are not comfortable with the proce-dure, seek out the assistance of a plumbing professional.
FIGURE 13ISOLATION/FLUSHING VALVE(WEBSTONE #41436 OR SIMILAR
e SYNC™ Water Flowrate vs. Water Pressure Drop
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
0 5 10 15 20 25 30 35 40
Water Flow Rate (GPM)
Hea
d Fe
et (f
t. H
2O) -
-- (N
OT
EQU
IVA
LEN
T FE
ET)
0.0
0.9
1.7
2.6
3.5
4.3
5.2
6.1
6.9
7.8
8.7
9.5
10.4
11.3
12.1
13.0
13.9
14.7
15.6
16.5
17.3
18.2
19.1
Pres
sure
Dro
p (p
sig)
H2AC Rooftop Unit Water Flowrate vs. Water Pressure Drop
21
XV. PRE-START CHECK1. Is unit properly located and slightly slanted toward indoorcondensate drain?
2. Is ductwork insulated, weatherproofed, with proper spacingto combustible materials?
3. Is air free to travel to and from outdoor coil? (See Figure 4.)
4. Is the wiring correct, tight, and according to unit wiring dia-gram?
5. Is unit grounded?
6. Are field supplied air filters in place and clean?
7. Do the outdoor fan and indoor blower turn freely withoutrubbing, and are they tight on the motor shafts?
XVI. STARTUP1. Turn thermostat to “OFF,” turn “on” power supply at discon-nect switch.
2. Turn temperature setting as high as it will go.3. Turn fan switch to “ON.”4. Indoor blower should run. Be sure it is running in the rightdirection.
5. Turn fan switch to “AUTO.” Turn system switch to “COOL”and turn temperature setting below room temperature. Unitshould run in cooling mode.
6. Is outdoor fan operating correctly in the right direction?7. Is compressor running correctly.Record the following after the unit has run some time.A. Operating Mode _______________________________B. Discharge Pressures (High) _____________PSIG [kPa]C. Vapor Pressure at Compressors (Low) _____PSIG [kPa]D. Vapor Line Temperature at Compressors ______°F [C°].
This procedure assumes that isolation/flushing valveshave been installed on the unit water inlet and outlet con-nections. If the unit was installed without valves, it is recom-mended that flushing be performed by a plumbing professional.
Required items:
• Five gallon bucket• Small circulation pump • Hoses with connections suitable for the unit drain valvesand pump.
• 2-3 gallons of food-grade white vinegar.• The bucket, pump, and hoses can be ordered as
Rheem flush kit RTG20124.
Instructions:
1. Turn off the electric supply to the unit. 2. Shut off the water supply to the unit using the isolation ballvalves. Consult the valve manufacturer’s instructions forspecifics in using their valve assemblies.
3. Attach a short hose to the threaded fittings on each drainvalve. Connect the hose on the inlet valve to the outlet of asmall circulation pump.
4. Pour approximately two to three gallons of food-grade whitevinegar into the pail.
5. Place the inlet hose from the pump and the drain hose fromthe outlet valve on the unit into the pail.
6. Open the drain valves and turn on the pump. Allow thevinegar solution to circulate for 45-60 minutes.
7. Turn off pump and drain vinegar from the heat exchanger.Close the inlet water drain valve.
8. Open the inlet water supply shut off valve and allow freshwater to flush the heat exchanger for at least five minutesto remove all traces of vinegar from the system.
9. Close the outlet water drain valve and open the outlet watersupply shut-off valve.
10. Restore electrical power and verify correct unit operation.
R Y1 Y2 G C W1 W2 W3 B
TERMINAL BLOCK
st-A1125-12-00
COOL
POWER
FAN
HEAT
ONLY USED ON DUAL
FUEL OR HEAT PUMP
MODELSLOW VOLTAGETHERMOSTAT CONNECTIONS
FIGURE 14THERMOSTATCONNECTIONSDIAGRAM
ST-A1125-12-00
22
E. Indoor Dry Bulb __________________________°F [C°].F. Indoor Wet Bulb__________________________°F [C°].G.Outdoor Dry Bulb_________________________°F [C°].H. Outdoor Wet Bulb ________________________°F [C°].I. Voltage at Contactor ________________________VoltsJ. Current at Contactors ______________________ AmpsK. Model Number_________________________________L. Serial Number _________________________________M.Location______________________________________N. Owner _______________________________________O.Date_________________________________________
8. Turn thermostat system switch to “HEAT.” Unit compres-sors should stop. Raise temperature setting to above roomtemperature. Unit should run in heating mode and auxiliaryheaters, if installed, should come on.
9. Check the refrigerant charge using the instructions locatedon unit charging chart. Replace service port caps. Serviceport cores are for system access only and will leak if nottightly capped.
10. Adjust discharge air grilles and balance system.11. Check ducts for condensation and air leaks.12. Check unit for tubing and sheet metal rattles.13. Instruct the owner on operation and maintenance.14. Leave “INSTALLATION” and ”USE AND CARE“ instruc-
tions with owner.
XVII. OPERATIONCOOLING MODEWith thermostat in the cool mode, fan auto and the room tem-perature higher than the thermostat setting:
A. Indoor blower contactor is energized through thermostatcontact (G).
B. Compressor contactors are energized through thermostatcontacts (Y1) & (Y2) and high pressure controls.
C. Economizer enthalpy control (if installed) controls operationof first-stage cooling and positions fresh air damper to main-tain mixed air temperature. Second-stage cooling operatesnormally as required by second stage of thermostats.
D. The system will continue in cooling operation as long as allsafety controls are closed, until the thermostat is satisfied.
HEATING MODEWith the thermostat in heat mode, fan on auto, and the roomtemperature lower than the thermostat setting, the Indoorblower contactor is energized through thermostat contact (G).
ONLY ELECTRIC HEATER KITS SUPPLIED BY THIS MAN-UFACTURER AS DESCRIBED IN THIS PUBLICATIONHAVE BEEN DESIGNED, TESTED, AND EVALUATED FORUSE WITH THIS UNIT. USE OF ANY OTHER MANUFAC-TURED ELECTRIC HEATERS INSTALLED WITHIN THISUNIT MAY CAUSE HAZARDOUS CONDITIONS RESULTINGIN PROPERTY DAMAGE, FIRE, BODILY INJURY ORDEATH.
In the heating mode, the thermostat will energize one or moresupplementary heaters.
XVIII. H2AC ROOFTOP UNITXVIII. SEQUENCE OF OPERATION1. On a call for cooling (“Y” from T’stat energized), unit alwaysstarts in air-cooled condenser mode and runs for two min-utes.
a. Liquid line solenoid from water-cooled heat exchanger isenergized during this time to expedite transfer of refrig-erant from water-cooled condenser.
2. After two minutes water pump is energized for 60 secondswhile water temperature is sampled by a thermistor.a. If water pressure transducer does not sense adequatepressure (5 psig), or water inlet temperature is >95°F goto step 7.
3. If water pressure transducer senses adequate pressureand water inlet temperature is <95°F, unit switches towater-cooled condenser mode*.a. Three-way valve is energized.b. Outdoor fans are switched off.c. Outdoor coil liquid line solenoid is energized to for twominutes to expedite return of liquid refrigerant in air-cooled condenser.
4. Unit operates in water-cooled condenser (water heating)mode until the call for cooling ends, outlet water tempera-ture reaches 138°F, or liquid line pressure >570 psig.
5. The control will record the water inlet temperature when therefrigerant pressure reaches 550 psig. The control will usethis value minus 20°F for the hybrid water inlet restart tem-perature.
6. If termination of a call for cooling ends the water-cooledcondenser (water heating) cycle, the unit will restart asdescribed in item 1 above on the next call for cooling.
7. If the water-cooled condenser (water heating) cycle termi-nates on water temperature rise (138°F) or pressure (>570psig) and there is still a call for cooling, the unit three-wayvalve switches back to the air-cooled condenser mode,turns on the outdoor fans, and energizes the liquid linesolenoid from the water-cooled condenser for two minutes.
8. If a cooling (“Y”) call continues, return to Step 2 after aselectable delay default is ten minutes.
FAULTS/LOCKOUTS/Misc.1. Low-temperature lockout - Occurs at 40°F for the water-cooled condenser (water heating) mode. Unit will onlyoperate in the air-cooled condenser mode below 40°F.
2. Standard DDC control lockouts – High pressure control,low pressure control, low ambient control, etc.
3. Three-way valve failure or water pump failure – A rapidrise in liquid line pressure will occur. If liquid line pressureincreases above 530 psig in less than one minute. If threeof these trips occur during a call for cooling, a hard lockoutof the water heating mode will occur, but the unit will stillfunction in the air-cooled condenser mode.
4. Airside solenoid valve failure – shows up as an under-charge in the water heating mode. If subcooling is lessthan 4° or superheat is more than 25° after 2 minutes, 30seconds unit will return to air cooled mode. If this happensthree times in a row without a successful run of at least fourminutes in the water heating mode, then a hard lockout ofthe water heatiing mode will occur, but the unit will stillfunction in the air-cooled condenser mode.
5. Freeze protection - If ambient is <35°F, water pump isenergized until ambient is >37°F.
6. Leak detection - If leak detector senses water, an alarmsignal is sent to the thermostat and waterside operation islocked out until leak detection ends.
Misc.1. Water pump is energized once every 24 hours to keepwater from stagnating in times of no cooling operation.
XIX. MISCELLANEOUSREPLACEMENT PARTSContact your local distributor for a complete parts list.
WARNING!
23
AIR
-FL
OW
PE
RF
OR
MA
NC
E –
10
TON
RL
HL
-C12
0 M
OD
EL
1090
2875
1110
3900
[184
1]69
915
2672
716
0175
416
7578
217
5080
918
2483
718
9986
419
7392
720
1594
820
8096
821
9498
823
0710
0824
2110
2925
3410
5726
4810
6927
6140
00 [1
888]
713
1609
740
1683
768
1758
795
1832
823
1907
850
1961
878
2056
935
2085
955
2199
975
2312
996
2426
1016
2539
1043
2653
1070
2767
2988
1077
2880
4100
[193
5]72
616
9275
417
6678
118
4180
919
1583
619
9086
420
6492
220
9194
222
0496
323
1898
324
3110
0325
4510
2426
5810
5627
7210
8428
8510
8429
9942
00 [1
982]
740
1774
767
1849
795
1923
822
1998
850
2072
877
2147
Exte
rnal
Sta
tic P
ress
ure—
Inch
es o
f Wat
er [k
Pa]
3200
[151
0]—
——
——
—65
711
7071
512
4574
213
1977
013
9479
714
6882
515
4385
216
1788
016
9295
616
9897
617
0399
618
1710
1719
3033
00 [1
557]
——
——
673
1179
701
1253
728
1328
756
1402
783
1477
811
1551
838
1626
866
1700
943
1705
963
1708
948
1822
976
1935
1024
2049
3400
[160
5]—
——
—68
712
6171
413
3674
214
1076
914
8579
715
5982
416
3485
217
0887
917
6395
018
1197
118
2796
219
4198
920
5410
3221
6835
00 [1
652]
——
673
1270
700
1344
728
1419
755
1493
783
1588
810
1642
838
1717
865
1791
938
1813
958
1832
978
1946
975
2059
1003
2173
1039
2286
3600
[169
9]—
—68
613
5271
414
2774
115
0176
915
7679
616
5082
417
2585
117
9987
918
7494
518
9296
619
5198
620
6598
921
7810
1622
9210
4724
0537
00 [1
746]
672
1361
700
1435
727
1510
755
1584
782
1659
810
1733
837
1808
865
1882
933
1896
953
1956
973
2070
993
2183
1002
2297
1030
2410
1054
2524
3800
[179
3]68
614
4371
315
1874
115
9276
816
6779
617
4182
318
1886
118
9087
819
6594
020
0396
020
7598
121
8910
0123
0210
1624
1610
4325
2910
6226
43
4300
[202
9]75
318
5778
119
3280
820
0683
620
8185
321
5591
722
1593
723
2895
724
4297
825
5599
826
6910
1827
8210
3928
9610
8330
0911
1131
2310
9932
3693
022
0995
023
2397
024
3899
025
5010
1126
6310
3127
7710
7028
9010
9730
0410
9231
17
4700
[221
8]80
721
8883
522
6386
223
3790
624
6292
725
7694
726
8996
728
0398
829
1610
0830
3010
2831
4310
4832
5710
6933
7111
3734
8411
6535
9811
3037
11
1130
3102
1097
2994
1117
3107
1138
3221
1105
3112
1125
3226
1145
3339
1037
2044
1057
2157
1077
2271
1044
2162
1065
2276
1085
2390
1052
2281
1072
2395
1092
2508
1059
2400
1080
2513
1100
2627
1067
2519
1087
2632
1108
2746
1075
2637
1095
2751
1115
2864
1082
2756
1102
2870
1123
2983
1120
3350
1140
3453
1160
3577
1112
3231
1133
3345
1153
3458
1150
3825
1170
3938
1190
4052
1191
3442
—11
5032
1511
7133
2911
5833
34—
1178
3448
1166
3453
1186
3566
1098
2384
1118
2498
1105
2503
1125
2617
1113
2622
1133
2735
1120
2740
1141
2854
1128
2859
1148
2973
1135
2978
1156
3091
1143
3097
1163
3210
1181
3690
——
1173
3572
1193
3685
——
——
——
1199
3561
——
——
——
——
——
1138
2611
1159
2725
1179
2838
1146
2730
1166
2844
1186
2957
1153
2849
1174
2962
1194
3076
1161
2968
1181
3081
——
1168
3086
1189
3200
——
1176
3205
1196
3318
——
1183
3324
——
——
——
——
——
——
——
——
——
——
——
4400
[207
7]76
719
4079
420
1482
220
8984
921
6387
722
3892
423
3394
524
4796
525
6098
526
7410
0627
8710
2629
0110
4630
1410
9731
2811
2432
4111
0733
5545
00 [2
124]
780
2023
808
2097
835
2172
863
2248
912
2338
1188
932
2452
4600
[217
1]79
421
0582
121
8084
022
5487
623
2991
924
5794
025
7196
026
8498
027
9810
0029
1110
2130
2510
4131
3810
6132
5211
2433
6511
5134
7911
2235
9295
225
8597
326
7999
327
9310
1329
0610
3330
2010
5431
3311
1032
4711
3833
6011
1534
7438
09—
1127
3468
1148
3582
1168
3695
—
1142
3706
1163
3819
1183
3933
1135
3587
1155
3701
1175
3814
——
——
1196
3928
——
——
——
——
——
——
——
——
——
——
4800
[226
5]82
122
7184
823
4587
624
2091
425
8193
426
9595
528
0897
529
2299
530
3510
1531
4910
3632
6210
5633
7610
7634
8911
5136
0311
7837
1611
3738
3011
5739
4311
7840
5711
9841
70—
——
——
——
——
—
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
WR
PMW
RPM
W0.
1 [.
02]
0.2
[.05
]0.
3 [.
07]
0.4
[.10
]0.
5 [.
12]
0.6
[.15
]0.
7 [.
17]
0.8
[.20
]0.
9 [.
22]
1.0
[.25
]1.
1 [.
27]
1.2
[.30
]1.
3 [.
32]
1.4
[.35
]1.
5 [.
37]
RPM
1.6
[.40
]1.
7 [.
42]
1.8
[.45
]W
RPM
WR
PMW
RPM
W1.
9 [.
47]
2.0
[.50
]2.
1 [.
52]
2.2
[.55
]2.
3 [.
57]
Air
Flow
CFM
[L/s
]
Capa
city
10 T
on [3
5.2
kW]
Driv
e Pa
ckag
eL
MM
otor
H.P
. [W
]2.
0 [1
491.
4]3.
0 [2
237.
1]Bl
ower
She
ave
BK90
BK65
Mot
or S
heav
e1V
P-44
1VP-
44Tu
rns
Ope
n1
23
45
61
23
45
6R
PM84
581
077
573
970
466
911
3810
8910
4199
294
389
4
NO
TES:
1. F
acto
ry s
heav
e se
tting
s ar
e sh
own
in b
old
prin
t.2.
Re-
adju
stm
ent o
f she
ave
requ
ired
to a
chie
ve ra
ted
airf
low
at A
RI m
inim
um E
.S.P
.3.
Do
not o
pera
te a
bove
blo
wer
RPM
sho
wn
as m
otor
ove
rload
ing
will
occ
ur.
4.D
o no
t set
mot
or s
heav
e be
low
one
turn
ope
n.
NO
TE: L
-Driv
e le
ft of
bol
d lin
e, M
-Driv
e rig
ht o
f bol
d lin
e.
AIR
FL
OW
CO
RR
EC
TIO
N F
AC
TO
RS
10 T
ON
[35
.2 k
W]
0.98
0.99
TOTA
L M
BH0.
96
0.99
0.97
0.97
3800
[179
3]1.
001.
01
1.00
0.99
1.02
4200
[198
2]
POW
ER k
W0.
981.
000.
981.
00
4000
[188
8]1.
03
1.01
1.07
4600
[217
1]
0.95
SEN
SIBL
E M
BH0.
910.
93
3600
[169
9]AC
TUAL
—CF
M[L
/s]
3200
[151
0]34
00[1
605]
1.04
1.01
1.09
4800
[226
5]1.
02
1.01
1.05
4400
[207
7]
CO
MP
ON
EN
T A
IR R
ES
ISTA
NC
E, I
WC
10
TO
N [
35.2
kW
]
Com
pone
nt
Stan
dard
Indo
or A
irflo
w—
CFM
[L/s
]
Conc
entr
ic D
iffus
er R
XRN
-FA6
5 or
FA75
& T
rans
ition
RXM
C-CD
040.
31[0
.077
]0.
37[0
.092
]D
NA
DN
AD
NA
DN
AD
NA
Conc
entr
ic D
iffus
er R
XRN
-AA6
1 or
AA71
& T
rans
ition
RXM
C-CE
05D
NA
3200
[151
0]34
00[1
604]
3600
[169
9]38
00[1
793]
4000
[188
8]42
00[1
982]
4400
[207
6]
DN
A0.
17[0
.042
]0.
18[0
.045
]0.
21[0
.052
]
Res
ista
nce—
Inch
es W
ater
[kPa
]
0.24
[0.0
60]
0.27
[0.0
67]
Hor
izon
tal E
cono
miz
er
100%
O.A
. Dam
per O
pen
0.11
[0.0
27]
0.12
[0.0
30]
0.13
[0.0
32]
0.15
[0.0
.36]
0.16
[0.0
40]
0.18
[0.0
44]
Wet
Coi
l0.
065
[0.0
16]
0.07
1[0
.018
]0.
076
[0.0
19]
0.08
2[0
.020
]0.
087
[0.0
22]
0.09
3[0
.023
]0.
099
[0.0
25]
0.19
[0.0
47]
Econ
omiz
er10
0% R
.A. D
ampe
r Ope
n0.
09[0
.022
]0.
10[0
.025
]0.
11[0
.027
]0.
12[0
.030
]0.
13[0
.032
]0.
14[0
.035
]0.
15[0
.037
]
DN
A
4600
[217
1]
DN
A
0.10
5[0
.026
]
0.20
[0.5
0]
0.16
[0.0
40]
0.10
[0.0
24]
DN
A
4800
[226
5]
Hor
izon
tal E
cono
miz
er10
0% R
.A. D
ampe
r Ope
n0.
05[0
.012
]0.
06[0
.014
]0.
06[0
.015
]0.
07[0
.017
]0.
08[0
.020
]0.
09[0
.021
]0.
09[0
.022
]
DN
A
0.11
0[0
.027
]
0.21
[0.0
52]
0.17
[0.0
42]
0.10
[0.0
25]
Conc
entr
ic D
iffus
er R
XRN
-AA6
6 or
AA76
& T
rans
ition
RXM
C-CF
06D
NA
DN
AD
NA
DN
AD
NA
DN
AD
NA
0.31
[0.0
77]
0.32
[0.0
80]
NO
TE: A
dd c
ompo
nent
resi
stan
ce to
duc
t res
ista
nce
to d
eter
min
e to
tal e
xter
nal s
tatic
pre
ssur
e.D
NA
= D
ata
not A
vaila
ble.
NO
TES:
1. M
ultip
ly c
orre
ctio
n fa
ctor
tim
es g
ross
per
form
ance
dat
a.2.
Res
ultin
g se
nsib
le c
apac
ity c
anno
t exc
eed
tota
l cap
acity
.
[]
Des
ign
ates
Met
ric
Co
nve
rsio
ns
CO
MP
ON
EN
T A
IR R
ES
ISTA
NC
E, I
WC
10 T
ON
[35
.2 k
W]
AIR
FLO
W C
OR
RE
CTI
ON
FA
CTO
RS
10 T
ON
[35.
2 kW
]
XX
. AIR
FL
OW
DA
TA T
AB
LE
S
24
WARNING!
XXI. TROUBLE SHOOTING CHART
DISCONNECT ALL POWER TO UNIT BEFORE SERVICING. CONTACTOR MAY BREAK ONLY ONE SIDE. FAILURETO SHUT OFF POWER CAN CAUSE ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR DEATH.
SYMPTOM POSSIBLE CAUSE REMEDYUnit will not run • Power off or loose electrical connection • Check for correct voltage at compressor contactor in control
box• Thermostat out of calibration-set too high • Reset• Defective contactor • Check for 24 volts at contactor coil - replace if contacts are
open• Blown fuses • Replace fuses• Transformer defective • Check wiring-replace transformer• High pressure control open (if provided) • Reset-also see high head pressure remedy-• Interconnecting low voltage wiring damaged • Replace thermostat wiring
Condenser fan runs, compressor • Run capacitor defective (single phase only) • Replacedoesn’t • Loose connection • Check for correct voltage at compressor -
check & tighten all connections• Compressor stuck, grounded or open motor winding • Wait at least 2 hours for overload to reset.open internal overload. If still open, replace the compressor.
• Low voltage condition At compressor terminals, voltage must be within 10% of ratingplate volts when unit is operating.
Insufficient cooling • Improperly sized unit • Recalculate load• Improper airflow • Check - should be approximately 400 CFM [188.78 L/s] per ton.• Incorrect refrigerant charge • Charge per procedure attached to unit service panel.• Air, non-condensibles or moisture in system • Recover refrigerant, evacuate & recharge, add filter drier• Incorrect voltage • At compressor terminals, voltage must be within 10% of rating
plate volts when unit is operating.
Compressor short cycles • Incorrect voltage • At compressor terminals, voltage must be ± 10% ofnameplate marking when unit is operating.
• Defective overload protector • Replace - check for correct voltage• Refrigerant undercharge • Add refrigerant
Registers sweat • Low evaporator airflow • Increase speed of blower or reduce restriction - replace airfilter
High head-low vapor pressures • Restriction in liquid line, expansion device or filter drier • Remove or replace defective component• Flow check piston size too small • Change to correct size piston• Incorrect capillary tubes • Change coil assembly• TXV does not open • Replace TXV
High head-high or normal vapor • Dirty condenser coil • Clean coilpressure - Cooling mode • Refrigerant overcharge • Correct system charge
• Condenser fan not running • Repair or replace• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge
High head-high or normal vapor • Low air flow - condenser coil • Check filters - correct to speedpressure - Heating mode • Refrigerant overcharge • Correct system charge
• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge• Dirty condenser coil • Check filter - clean coil
Low head-high vapor pressures • Defective Compressor valves • Replace compressor
Low vapor - cool compressor - • Low evaporator airflow • Increase speed of blower or reduce restriction - replace airiced evaporator coil filter
• Operating below 65°F outdoors • Add Low Ambient Kit• Moisture in system • Recover refrigerant - evacuate & recharge - add filter drier• TXV limiting refrigerant flow • Replace TXV
High vapor pressure • Excessive load • Recheck load calculation• Defective compressor • Replace
Fluctuating head & vapor • TXV hunting • Check TXV bulb clamp - check air distribution on coil - replacepressures TXV
• Air or non-condensibles in system • Recover refrigerant, evacuate & recharge
Gurgle or pulsing noise at • Air or non-condensibles in system • Recover refrigerant, evacuate & rechargeexpansion device or liquid line
25
XXII. H2AC ROOFTOP UNIT ALARMS AND TROUBLESHOOTINGAlarm Designation MODBUS "Current Alarm" Code Description Troubleshooting Information
The sensor in the water heating (hybrid) section of the unit has detected a water leak and stopped water heating operation. A relay output for an optional field-installed water shutoff valve is energized.
> Check for loose or defective air vent valve on water discharge line in water heating section.> Check for water pump seal leakage. > Check that sensor is installed correctly on control.> Replace the sensor.
No alarm is set. The water sensor measures potable water pressure in the water heating section. If the water pressure is below 5 PSIG, water heating operation will not begin. If the sensor becomes unavailable, water heating operation terminates. The unit can continue to operate in cooling mode.
> Check that sensor is correctly installed on control.> The sensor has three wires that attach to the hybrid control. Check for 5VDC between the outer terminals. If 5VDC is not present, replace the hybrid control.> Replace the sensor.
The outdoor ambient sensor on the RTU-C has detected outdoor ambient temperature below 35°F. The water pump is energiced continuously until the outdoor ambient temperature rises above 38°F.
> Check that sensor is installed correctly on control.> Check sensor location.> Replace the sensor.
At the beginning of each water heating cycle, if the high pressure sensor value exceeds 530 PSIG after 3 seconds but before 60 seconds are elapsed, an alarm is set.
> Check water pump operation, shut-off valves, etc. for adequate water flow.> Check for 24VAC at control transformer> Check for 24VAC at hybrid unit 3-way refrigerant valve.> Increase water sample delay time using DIP switches on hybrid control.> Replace 3-way refrigerant valve if it fails to shift.
The water pump is energzed continuously until the sensor becomes available.
> Extreme temperatures.> Check that sensor is installed correctly.> Replace the sensor.
If the sensor becomes unavailable, an alarm will be set and water heating operation terminates. Unit can continue to operate in cooling mode.
> Extreme temperatures.> Check that sensor is installed correctly.> Replace the sensor.
If the sensor becomes unavailable, an alarm will be set and water heating operation terminates. Unit can continue to operate in cooling mode.
> Extreme temperatures.> Check that sensor is installed correctly.> Replace the sensor.
If both sensors becomes unavailable, an alarm will be set and water heating operation terminates. Unit can continue to operate in cooling mode.
> Extreme temperatures.> Check that sensor is installed correctly.> Replace the sensors.
The high pressure sensor measures liquid refrigerant pressure. If the sensor becomes unavailable, water heating operation terminates and an alarm is set. Unit can continue to operate in cooling mode.
> Check that sensor is correctly installed on control.> The sensor has three wires that attach to the hybrid control. Check for 5VDC between the outer terminals. If 5VDC is not present, replace the hybrid control.> Replace the sensor.
The low pressure sensor measures liquid refrigerant pressure. If the sensor becomes unavailable, water heating operation terminates and an alarm is set. Unit can continue to operate in cooling mode.
> Check that sensor is correctly installed on control.> The sensor has three wires that attach to the hybrid control. Check for 5VDC between the outer terminals. If 5VDC is not present, replace the hybrid control.> Replace the sensor.
If alarms 105, 115, 116, 117, or 118 are initiated more than 3 times from unit power-up, an alarm is set and water heating mode is terminated until the alarm is cleared. The lockout fault can only be cleared by removing power to the unit or by sending a "Clear All Alarms" command through the BAS network.
> Check individual alarms.
If, 2 minutes after the 3-way valve has shifted, low subcooling was continuously measured for more than 30 seconds during the water heating mode an alarm is set. Unit operation continues.
> If low subcooling occurs after exiting the air conditioning mode, check wiring and verify operation of outdoor refrigerant (air side) solenoid.> Check location of liquid line temperature sensor.> Verify correct refrigerant charge.
Low Subcooling - air conditioning mode
If, 2 minutes after the 3-way valve has shifted, low subcooling was continuously measured for more than 30 seconds during the air conditining mode an alarm is set. Unit operation continues.
> If low subcooling occurs after exiting the water heating mode, check wiring and verify operation of flat plate heat exchanger (water side) solenoid.> Check location of liquid line temperature sensor.> Verify correct refrigerant charge.
High Superheat - water heating mode
If, 2 minutes after the 3-way valve has shifted, high superheat was continuously measured for more than 30 seconds during the water heating mode an alarm is set. Unit operation continues.
> High internal building load.> Expansion valve is not operating correctly.
High Superheat - air conditioning heating mode
If, 2 minutes after the 3-way valve has shifted, high superheat was continuously measured for more than 30 seconds during the air conditioning mode an alarm is set. Unit operation continues.
> If high superheat occurs after exiting the water heating mode, check wiring and verify operation of flat plate heat exchanger (water side) solenoid.> High internal building lode.> Expansion valve is not operating correctly.
H2AC Rooftop Unit Water Leakage 102
103
104
105
106
107
108
109
110
111
112
115
116
117
118
H2AC Rooftop Unit Low Water Pressure
H2AC Rooftop Unit Freeze Protection Mode
H2AC Rooftop Unit Solenoid Fault
H2AC Rooftop Unit Ambient Sensor Fault
H2AC Rooftop Unit Water Inlet Sensor Fault
H2AC Rooftop Unit Water Outlet Sensor Fault
H2AC Rooftop Unit Water Inlet and Outlet Sensor Fault
H2AC Rooftop Unit High Pressure Sensor Fault
H2AC Rooftop Unit Low Pressure Sensor Fault
H2AC Rooftop Unit Lockout Fault
H2AC Rooftop Unit Low Subcooling - water heating mode
26
XXIII. WIRING DIAGRAMS
27
28
29
30
RLHL SYSTEM CHARGE CHARTFIGURE 15
XXIV. CHARGING CHART
31
32 CM 1011
