Rheem H2AC User manual

INSTALLATION INSTRUCTIONS
FOR THE RHEEM H2AC ROOFTOP UNIT
FEATURIN eSYNC INTE RATION TECHNOLO Y
RKHL-D SERIES 15 TON [52.8 kW]
ASHRAE 90.1 2007 COMPLIANT, WITH CLEAR CONTROL
92-23577-135-01
SUPERSE ES 92-23577-135-00
[ ] INDICATES METRIC CONVERSIONS
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION!
!
DO NOT DESTROY THIS MANUAL
PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE BY A SERVICEMAN
WARNING
!
THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUAL-
IFIED, LICENSED SERVICE PERSONNEL FOR PROPER
INSTALLATION, ADJUSTMENT AND OPERATION OF THIS
UNIT. READ THESE INSTRUCTIONS THOROUGHLY BEFORE
ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER
INSTALLATION, ADJUSTMENT, SERVICE OR MAINTENANCE
POSSIBLY RESULTING IN FIRE, ELECTRICAL SHOCK,
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
INTEGRATION TECHNOLOGY

2
TABLE OF CONTENTS
I. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Major Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
R410A Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unit imensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
General ata. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Gross Systems Performance ata. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Water Heating Performance ata. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
II. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Exhaust & Combustion Hoods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Filter Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ucting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Return Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
III. GAS SUPPLY, CON ENSATE RAIN AN PIPING. . . . . . . . . . . . . . 17
Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LP Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Adjusting or Checking Furnace Input. . . . . . . . . . . . . . . . . . . . . . . . . . 19
Condensate rain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
IV. WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Hook-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
V. WATER CONNECTIONS AN START UP FOR POTABLE
WATER HEATING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Water Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
System Pressure Test and Start Up. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
H2AC Rooftop Unit Sequence Of Operation . . . . . . . . . . . . . . . . . . . . 25
Procedure for Calculating the Total Equivalent Length of Tubing . . . . 26
H2AC Rooftop Unit/Water Heater Sequence of Operation. . . . . . . . . . 29
Faults/Lockouts/Misc.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
VI. FURNACE SECTION CONTROLS AN IGNITION SYSTEM. . . . . . . 34
Normal Furnace Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . . 34
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Burners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Manual Reset Overtemperature Control . . . . . . . . . . . . . . . . . . . . . . . 36
Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
VII. COOLING SECTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cooling Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Continuous Fan Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
VIII. SYSTEM OPERATING INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . 37
Advise the Customer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Furnace Section Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Cooling Section Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Wiring iagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
IX. AIRFLOW PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
X. ELECTRICAL ATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
XI. TROUBLESHOOTING CHART. . . . . . . . . . . . . . . . . . . . . . . . . . . . 43-45
XII. H2AC ROOFTOP UNIT ALARMS AN TROUBLESHOOTING. . . . . . 46
XIII. WIRING IAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47-50
XIV. CHARGE CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

THE MANUFACTURER’S WARRANTY
DOES NOT COVER ANY DAMA E OR
DEFECT TO THE AIR CONDITIONER
CAUSED BY THE ATTACHMENT OR
USE OF ANY COMPONENTS, ACCES-
SORIES OR DEVICES (OTHER THAN
THOSE AUTHORIZED BY THE MANU-
FACTURER) INTO, ONTO OR IN CON-
JUNCTION WITH THE AIR CONDI-
TIONER. YOU SHOULD BE AWARE
THAT THE USE OF UNAUTHORIZED
COMPONENTS, ACCESSORIES OR
DEVICES MAY ADVERSELY AFFECT
THE OPERATION OF THE AIR CONDI-
TIONER AND MAY ALSO ENDAN ER
LIFE AND PROPERTY. THE MANU-
FACTURER DISCLAIMS ANY
RESPONSIBILITY FOR SUCH LOSS
OR INJURY RESULTIN FROM THE
USE OF SUCH UNAUTHORIZED
COMPONENTS, ACCESSORIES OR
DEVICES.
3
CHECKING RODUCT RECEIVED
This booklet contains the installation and operating instructions for your combination
gas heating/electric cooling unit. There are some precautions that should be taken to
derive maximum satisfaction from it. Improper installation can result in unsatisfactory
operation or dangerous conditions.
Read this booklet and any instructions packaged with separate equipment required
to make up the system prior to installation. Give this booklet to the owner and explain
its provisions. The owner should retain this booklet for future reference.
EQUI MENT ROTECTION FROM THE
ENVIRONMENT
Upon receiving the unit, inspect it for any damage from shipment. Claims for dam-
age, either shipping or concealed, should be filed immediately with the shipping com-
pany. IMPORTANT: Check the unit model number, heating size, electrical character-
istics, and accessories to determine if they are correct.
I. S ECIFICATIONS
A. GENERAL
The Rheem H2AC Rooftop Unit Combination Gas Heating/Electric Cooling Rooftop
with integrated Potable Water Heating is available in 250,000 BTUH and 350,000
BTUH gas heating inputs. Cooling capacity is 15 nominal tons.
Potable water heating capacities range from approximately 117,000 BTUH to
145,000 BTUH depending on water temperature, indoor air temperatures, and indoor
CFM.
Units are designed for downflow-only supply and return air and are weatherized and
intended for outdoor installation.
Since the waste-heat recovery/water heating feature of the H2AC Rooftop Unit only
functions during the cooling mode, the unit should be installed to serve the area of
the structure having the largest cooling run-time load, for instance the kitchen area of
the restaurant, in order to provide the greatest water heating and energy saving ben-
efits.
B. MAJOR COM ONENTS
The typical unit includes a hermetically-sealed refrigerating system consisting of a
scroll compressor, condenser coil, evaporator coil with TXV, a circulation air blower, a
condenser fan, a refrigerant to air heat exchanger assembly, a refrigerant to water
heat exchanger, 3-way valve, and 2 solenoid valves, gas burner and control assem-
bly, combustion air motor and fan, and all necessary internal electrical wiring. The
cooling systems of these units are factory-evacuated, charged and performance test-
ed. Refrigerant amount and type are indicated on rating plate.
C. R410A REFRIGERANT
All 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. It cannot 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 equipment, pumps, hoses, and the like need to have design
pressure ratings appropriate for R-410A. Manifold sets need to range up to 800 psig
high-side and 250 psig low-side with a 550 psig low-side retard. Hoses need to have a
service pressure rating of 800 psig. Recovery cylinders need to have a 400 psig service
pressure rating. OT 4BA400 or OT BW400.
Combustibility: At pressures above 1 atmosphere, mixture of R-410A and air can
become combustible. R-410A and air should never be mixed in tanks or supply
lines, or be allowed to accumulate in storage tanks. Leak checking should never
be done with a mixture of R-410A and air. Leak checking can be performed safely with
nitrogen or a mixture of R-410A and nitrogen.
Recognize this symbol as an
indication of Important Safety
Information!
!
UNITS ARE NOT DESI N CERTIFIED
TO BE INSTALLED INSIDE THE
STRUCTURE. DOIN SO CAN
CAUSE INADEQUATE UNIT PER-
FORMANCE AS WELL AS PROPERTY
DAMA E AND CARBON MONOXIDE
POISONIN RESULTIN IN PERSON-
AL INJURY OR DEATH.
sWARNING
!
PROVIDE ADEQUATE COMBUSTION
AND VENTILATION AIR TO THE UNIT
SPACE AS SPECIFIED IN THE COM-
BUSTION AND VENTILATION AIR
SECTION OF THESE INSTRUCTIONS.
sWARNING
!
sWARNING
!
!WARNIN
EFFICIENCY TESTIN NOTICE
FOR PURPOSES OF VERIFYIN OR
TESTIN EFFICIENCY RATIN S, THE
TEST PROCEDURE IN TITLE 10 PART
431 APPENDIX A TO SUBPART F
(UNIFORM TEST METHOD FOR
MEASURIN THE ENER Y
CONSUMPTION OF SMALL LAR E
AND VERY LAR E COMMERCIAL
PACKA E AIR CONDITIONIN AND
HEATIN EQUIPMENT), TITLE 10
PART 431.76 SUBPART D (UNIFORM
TEST METHOD FOR MEASURIN
ENER Y CONSUMPTION OF
COMMERCIAL WARM AIR
FURNACES), AND THE CLARIFYIN
PROVISIONS PROVIDED IN THE
AHRI OPERATIONS MANUALS FOR
UNITARY LAR E EQUIPMENT
340/360, 365 AND COMMERCIAL
FURNACES THAT WERE APPLICA-
BLE AT THE DATE OF MANUFAC-
TURE SHOULD BE USED FOR TEST
SET UP AND PERFORMANCE.

4
2. Quick Reference Guide For R-410A
• R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than R-
22. Ensure that servicing equipment is designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A, as with other HFC’s is only compatible with POE oils.
• 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 dip tube. These cylinders should be kept upright for
equipment charging. Post March 1999 cylinders do not have a dip tube and should be
inverted to ensure liquid charging of the equipment.
• o not install a suction line filter drier in the liquid line.
• A liquid line filter drier is standard on every unit.
• esiccant (drying agent) must be compatible for POE oils and R-410A.
3. Evaporator Coil/ TXV
The thermostatic expansion valve is specifically designed to operate with R-410A. DO
NOT use an R-22 TXV. The existing evaporator must be replaced with the factory
specified TXV 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
- ept. of Transportation 4BA400 or BW400
R-410A systems operate at higher pressures than R-22 systems. o not use
R-22 service equipment or components on R-410A equipment.
sCAUTION
!

5
SAFETY INFORMATION
USE ONLY WITH TYPE OF AS
APPROVED FOR THIS UNIT. REFER
TO THE UNIT RATIN PLATE.
sWARNING
!
INSTALL THIS UNIT ONLY IN A
LOCATION AND POSITION AS SPECI-
FIED IN THE LOCATION REQUIRE-
MENTS AND CONSIDERATIONS SEC-
TION OF THESE INSTRUCTIONS.
PROVIDE ADEQUATE COMBUSTION
AND VENTILATION AIR TO THE UNIT
SPACE AS SPECIFIED IN THE VENT-
IN SECTION OF THESE INSTRUC-
TIONS.
sWARNING
!
PROVIDE ADEQUATE COMBUSTION
AND VENTILATION AIR TO THE UNIT
SPACE AS SPECIFIED IN THE COM-
BUSTION AND VENTILATION AIR
SECTION OF THESE INSTRUCTIONS.
sWARNING
!
COMBUSTION PRODUCTS MUST BE
DISCHAR ED OUTDOORS.
CONNECT THIS UNIT TO AN
APPROVED VENT SYSTEM ONLY, AS
SPECIFIED IN VENT PIPE
INSTALLATION SECTION OF THESE
INSTRUCTIONS.
sWARNING
!
ALWAYS INSTALL UNIT TO OPERATE WITHIN THE UNIT'S INTENDED TEM-
PERATURE-RISE RAN E WITH A DUCT SYSTEM WHICH HAS AN EXTER-
NAL STATIC PRESSURE WITHIN THE ALLOWABLE RAN E, AS SPECIFIED
IN DUCTIN SECTION OF THESE INSTRUCTIONS. SEE ALSO UNIT RATIN
PLATE.
sWARNING
!
NEVER TEST FOR AS LEAKS WITH AN OPEN FLAME. USE A COMMER-
CIALLY AVAILABLE SOAP SOLUTION MADE SPECIFICALLY FOR THE
DETECTION OF LEAKS TO CHECK ALL CONNECTIONS, AS SPECIFIED IN
AS SUPPLY AND PIPIN SECTION OF THESE INSTRUCTIONS.
sWARNING
!
WHEN A UNIT IS INSTALLED SO THAT SUPPLY DUCTS CARRY AIR CIRCU-
LATED BY THE UNIT TO AREAS OUTSIDE THE SPACE CONTAININ THE
UNIT, THE RETURN AIR SHALL ALSO BE HANDLED BY DUCT(S) SEALED
TO THE UNIT CASIN AND TERMINATIN OUTSIDE THE SPACE CONTAIN-
IN THE UNIT.
sWARNING
!
THIS UNIT MAY BE USED TO HEAT THE BUILDIN OR STRUCTURE DUR-
IN CONSTRUCTION IF THE FOLLOWIN INSTALLATION REQUIREMENTS
ARE MET. INSTALLATION MUST COMPLY WITH ALL INSTALLATION
INSTRUCTIONS INCLUDIN :
• PROPER VENT INSTALLATION;
• FURNACE OPERATIN UNDER THERMOSTATIC CONTROL;
• RETURN AIR DUCT SEALED TO THE FURNACE;
• AIR FILTERS IN PLACE;
• SET FURNACE INPUT RATE AND TEMPERATURE RISE PER RATIN
PLATE MARKIN ;
• MEANS OF PROVIDIN OUTDOOR AIR REQUIRED FOR COMBUSTION;
• RETURN AIR TEMPERATURE MAINTAINED BETWEEN 55°F (13°C) AND
80°F (27°C); AND
• INSTALLATION OF EXHAUST AND COMBUSTION AIR INLET HOODS
COMPLETED;
• CLEAN FURNACE, DUCT WORK AND COMPONENTS UPON SUBSTAN-
TIAL COMPLETION OF THE CONSTRUCTION PROCESS, AND VERIFY
FURNACE OPERATIN CONDITIONS INCLUDIN I NITION, INPUT RATE,
TEMPERATURE RISE AND VENTIN ACCORDIN TO THE INSTRUC-
TIONS.
sWARNING
!

6
ST-A1207-07
FI URE 1
UNIT DIMENSIONS
FOR CLEARANCES SEE PA E 14, FI URE 4.
IMPORTANT: THIS UNIT MUST BE MOUNTED LEVEL IN BOTH DIRECTIONS
TO ALLOW WATER TO DRAIN FROM THE CONDENSER SECTION AND
CONDENSATE PAN.

FI URE 2
LEFT VIEW
7
ST-A1207-08

8
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 motor heat. Units are suitable for operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment certification program, which is
based on AHRI Standard 210/240 or 360.
2. EER and/or SEER are rated at AHRI conditions and in accordance with OE test procedures.
3. Integrated Energy Efficiency Ratio (IEER) is rated in accordance with AHRI Standard 210/240 or 360.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions using American National Standard Institute standards. Ratings shown are for
elevations up to 2000 feet. For elevations above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet above sea level.
5. Outdoor Sound Rating shown is tested in accordance with AHRI Standard 270.
ENERAL DATA - RKHL
NOM. SIZES 7.5-10 TON [26.4 & 35.2 kW] ENER YSTAR COMPLIANT MODELS
% % %
Model RKHL- Series D180CL25E D180CL35E D180CM25E D180CM35E
Cooling Performance1Continued ->
Gross Cooling Capacity Btu [kW] 182,000 [53.33] 182,000 [53.33] 182,000 [53.33] 182,000 [53.33]
EER/SEER212.4/NA 12.4/NA 12.4/NA 12.4/NA
Nominal CFM/AHRI Rated CFM [L/s] 6000/5800 [2831/2737] 6000/5800 [2831/2737] 6000/5800 [2831/2737] 6000/5800 [2831/2737]
AHRI Net Cooling Capacity Btu [kW] 176,000 [51.57] 176,000 [51.57] 176,000 [51.57] 176,000 [51.57]
Net Sensible Capacity Btu [kW] 130,400 [38.21] 130,400 [38.21] 130,400 [38.21] 130,400 [38.21]
Net Latent Capacity Btu [kW] 45,600 [13.36] 45,600 [13.36] 45,600 [13.36] 45,600 [13.36]
IEER313 13 13 13
Net System Power kW 14.23 14.23 14.23 14.23
Heating Performance (Gas)4
Heating Input Btu [kW] (1st Stage / 2nd Stage) 125,000/250,000 [36.62/73.25] 175,000/350,000 [51.27/102.55] 125,000/250,000 [36.62/73.25] 175,000/350,000 [51.27/102.55]
Heating Output Btu [kW] (1st Stage / 2nd Stage) 101,500/203,000 [29.74/59.48] 142,000/284,000 [41.61/83.21] 101,500/203,000 [29.74/59.48] 142,000/284,000 [41.61/83.21]
Temperature Rise Range ºF [ºC] (1st Stage / 2nd Stage) 15-45 [8.3-25] / 15-45 [8.3-25] 30-60 [16.7-33.3] / 30-60 [16.7-33.3] 15-45 [8.3-25] / 15-45 [8.3-25] 30-60 [16.7-33.3] / 30-60 [16.7-33.3]
Steady State Efficiency (%) 81 81 81 81
No. Burners 10 14 10 14
No. Stages 2 2 2 2
Gas Connection Pipe Size in. [mm] 0.75 [19] 0.75 [19] 0.75 [19] 0.75 [19]
Compressor
No./Type 2/Scroll 2/Scroll 2/Scroll 2/Scroll
Outdoor Sound Rating (dB)591 91 91 91
Outdoor Coil - Fin Type Louvered Louvered Louvered Louvered
Tube Type MicroChannel MicroChannel MicroChannel MicroChannel
MicroChannel Depth in. [mm] 1 [25.4] 1 [25.4] 1 [25.4] 1 [25.4]
Face Area sq. ft. [sq. m] 50.8 [4.72] 50.8 [4.72] 50.8 [4.72] 50.8 [4.72]
Rows / FPI [FPcm] 1 / 23 [9] 1 / 23 [9] 1 / 23 [9] 1 / 23 [9]
Indoor Coil - Fin Type Louvered Louvered Louvered Louvered
Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 26.67 [2.48] 26.67 [2.48] 26.67 [2.48] 26.67 [2.48]
Rows / FPI [FPcm] 2 / 18 [7] 2 / 18 [7] 2 / 18 [7] 2 / 18 [7]
Refrigerant Control TX Valves TX Valves TX Valves TX Valves
Drain 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 Propeller
No. Used/Diameter in. [mm] 3/24 [609.6] 3/24 [609.6] 3/24 [609.6] 3/24 [609.6]
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
CFM [L/s] 10000 [4719] 10000 [4719] 10000 [4719] 10000 [4719]
No. Motors/HP 3 at 1/3 HP 3 at 1/3 HP 3 at 1/3 HP 3 at 1/3 HP
Motor RPM 1075 1075 1075 1075
Indoor Fan - Type FC Centrifugal FC Centrifugal FC Centrifugal FC Centrifugal
No. Used/Diameter in. [mm] 2/18x9 [457x229] 2/18x9 [457x229] 2/18x9 [457x229] 2/18x9 [457x229]
Drive Type Belt (Adjustable) Belt (Adjustable) Belt (Adjustable) Belt (Adjustable)
No. Speeds Single Single Single Single
No. Motors 1 1 1 1
Motor HP 3 3 5 5
Motor RPM 1725 1725 1725 1725
Motor Frame Size 56 56 184 184
Potable Water Heat Recovery
Heat Exchanger Type Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate
Material Cu Brazed Stainless Steel Cu Brazed Stainless Steel Cu Brazed Stainless Steel Cu Brazed Stainless Steel
No. Flat Plates 50 50 50 50
Unit 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 Centrifugal
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
Housing Material Stainless Steel Stainless Steel Stainless Steel Stainless Steel
GPM [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 1/3
Motor RPM 3450 3450 3450 3450
Filter - Type Disposable Disposable Disposable Disposable
Furnished Yes Yes Yes Yes
(NO.) Size Recommended in. [mm x mm x mm] (8)2x25x20 [51x635x508] (8)2x25x20 [51x635x508] (8)2x25x20 [51x635x508] (8)2x25x20 [51x635x508]
Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 171/201 [4848/5698] 171/201 [4848/5698] 171/201 [4848/5698] 171/201 [4848/5698]
Weights
Net Weight lbs. [kg] 2027 [919] 2040 [925] 2056 [933] 2069 [938]
Ship Weight lbs. [kg] 2154 [977] 2167 [983] 2183 [990] 2196 [996]

9
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 motor heat. Units are suitable for operation to 20% of nominal cfm. Units are certified in accordance with the Unitary Air Conditioner Equipment certification program, which is
based on AHRI Standard 210/240 or 360.
2. EER and/or SEER are rated at AHRI conditions and in accordance with OE test procedures.
3. Integrated Energy Efficiency Ratio (IEER) is rated in accordance with AHRI Standard 210/240 or 360.
4. Heating Performance limit settings and rating data were established and approved under laboratory test conditions using American National Standard Institute standards. Ratings shown are for
elevations up to 2000 feet. For elevations above 2000 feet, ratings should be reduced at the rate of 4% for each 1000 feet above sea level.
5. Outdoor Sound Rating shown is tested in accordance with AHRI Standard 270.
ENERAL DATA - RKHL
NOM. SIZES 7.5-10 TON [26.4 & 35.2 kW] ENER YSTAR COMPLIANT MODELS
% % %
Model RKHL- Series D180DL25E D180DL35E D180DM25E D180DM35E
Cooling Performance1
Gross Cooling Capacity Btu [kW] 182,000 [53.33] 182,000 [53.33] 182,000 [53.33] 182,000 [53.33]
EER/SEER212.4/NA 12.4/NA 12.4/NA 12.4/NA
Nominal CFM/AHRI Rated CFM [L/s] 6000/5800 [2831/2737] 6000/5800 [2831/2737] 6000/5800 [2831/2737] 6000/5800 [2831/2737]
AHRI Net Cooling Capacity Btu [kW] 176,000 [51.57] 176,000 [51.57] 176,000 [51.57] 176,000 [51.57]
Net Sensible Capacity Btu [kW] 130,400 [38.21] 130,400 [38.21] 130,400 [38.21] 130,400 [38.21]
Net Latent Capacity Btu [kW] 45,600 [13.36] 45,600 [13.36] 45,600 [13.36] 45,600 [13.36]
IEER313 13 13 13
Net System Power kW 14.23 14.23 14.23 14.23
Heating Performance (Gas)4
Heating Input Btu [kW] (1st Stage / 2nd Stage) 125,000/250,000 [36.62/73.25] 175,000/350,000 [51.27/102.55] 125,000/250,000 [36.62/73.25] 175,000/350,000 [51.27/102.55]
Heating Output Btu [kW] (1st Stage / 2nd Stage) 101,500/203,000 [29.74/59.48] 142,000/284,000 [41.61/83.21] 101,500/203,000 [29.74/59.48] 142,000/284,000 [41.61/83.21]
Temperature Rise Range ºF [ºC] (1st Stage / 2nd Stage) 15-45 [8.3-25] / 15-45 [8.3-25] 30-60 [16.7-33.3] / 30-60 [16.7-33.3] 15-45 [8.3-25] / 15-45 [8.3-25] 30-60 [16.7-33.3] / 30-60 [16.7-33.3]
Steady State Efficiency (%) 81 81 81 81
No. Burners 10 14 10 14
No. Stages 2 2 2 2
Gas Connection Pipe Size in. [mm] 0.75 [19] 0.75 [19] 0.75 [19] 0.75 [19]
Compressor
No./Type 2/Scroll 2/Scroll 2/Scroll 2/Scroll
Outdoor Sound Rating (dB)591 91 91 91
Outdoor Coil - Fin Type Louvered Louvered Louvered Louvered
Tube Type MicroChannel MicroChannel MicroChannel MicroChannel
MicroChannel Depth in. [mm] 1 [25.4] 1 [25.4] 1 [25.4] 1 [25.4]
Face Area sq. ft. [sq. m] 50.8 [4.72] 50.8 [4.72] 50.8 [4.72] 50.8 [4.72]
Rows / FPI [FPcm] 1 / 23 [9] 1 / 23 [9] 1 / 23 [9] 1 / 23 [9]
Indoor Coil - Fin Type Louvered Louvered Louvered Louvered
Tube Type Rifled Rifled Rifled Rifled
Tube Size in. [mm] OD 0.375 [9.5] 0.375 [9.5] 0.375 [9.5] 0.375 [9.5]
Face Area sq. ft. [sq. m] 26.67 [2.48] 26.67 [2.48] 26.67 [2.48] 26.67 [2.48]
Rows / FPI [FPcm] 2 / 18 [7] 2 / 18 [7] 2 / 18 [7] 2 / 18 [7]
Refrigerant Control TX Valves TX Valves TX Valves TX Valves
Drain 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 Propeller
No. Used/Diameter in. [mm] 3/24 [609.6] 3/24 [609.6] 3/24 [609.6] 3/24 [609.6]
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
CFM [L/s] 10000 [4719] 10000 [4719] 10000 [4719] 10000 [4719]
No. Motors/HP 3 at 1/3 HP 3 at 1/3 HP 3 at 1/3 HP 3 at 1/3 HP
Motor RPM 1075 1075 1075 1075
Indoor Fan - Type FC Centrifugal FC Centrifugal FC Centrifugal FC Centrifugal
No. Used/Diameter in. [mm] 2/18x9 [457x229] 2/18x9 [457x229] 2/18x9 [457x229] 2/18x9 [457x229]
Drive Type Belt (Adjustable) Belt (Adjustable) Belt (Adjustable) Belt (Adjustable)
No. Speeds Single Single Single Single
No. Motors 1 1 1 1
Motor HP 3 3 5 5
Motor RPM 1725 1725 1725 1725
Motor Frame Size 56 56 184 184
Potable Water Heat Recovery
Heat Exchanger Type Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate Vented Double-Wall Flat Plate
Material Cu Brazed Stainless Steel Cu Brazed Stainless Steel Cu Brazed Stainless Steel Cu Brazed Stainless Steel
No. Flat Plates 50 50 50 50
Unit 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 Centrifugal
Drive Type/No. Speeds Direct/1 Direct/1 Direct/1 Direct/1
Housing Material Stainless Steel Stainless Steel Stainless Steel Stainless Steel
GPM [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 1/3
Motor RPM 3450 3450 3450 3450
Filter - Type Disposable Disposable Disposable Disposable
Furnished Yes Yes Yes Yes
(NO.) Size Recommended in. [mm x mm x mm] (8)2x25x20 [51x635x508] (8)2x25x20 [51x635x508] (8)2x25x20 [51x635x508] (8)2x25x20 [51x635x508]
Refrigerant Charge Oz. (Sys. 1/Sys. 2) [g] 171/201 [4848/5698] 171/201 [4848/5698] 171/201 [4848/5698] 171/201 [4848/5698]
Weights
Net Weight lbs. [kg] 2027 [919] 2040 [925] 2056 [933] 2069 [938]
Ship Weight lbs. [kg] 2154 [977] 2167 [983] 2183 [990] 2196 [996]

10
ROSS COOLIN PERFORMANCE DATA – RKHL-D180
!"##$%&&'() *(##$%"!&!) +(##$%"",*) !"##$%&&'() *(##$%"!&!) +(##$%"",*) !"##$%&&'() *(##$%"!&!) +(##$%"",*)
#-.* #-.. #-#! #-.* #-.. #-#! #-.* #-.. #-#!
75ºF Total BTUH [kW] """$%,*-.) "."-!$%,"-&) "#,$%,#-+) ".#-!$%,.-!) "#.-'$%*'-") .'*-*$%*!-&) "#*-,$%,#-&) .'!$%*!-!) .'#-($%**-')
[23.9ºC] Sens BTUH [kW] .&!-!$%+#-+) ."&-($%&,-&) ..&-($%&&-&) .,"-($%+!-!) .+,-+$%+"-') .&+-,$%&'-+) .((-!$%**-&) .,'-,$%+'-!) .*,$%+*-!)
Power .#-' .#-, .#-* .#-! .#-* .#-& .#-, .#-+ .#-"
80ºF Total BTUH [kW] ".,-,$%,&-*) "#!-*$%,#-() "#.$%*(-') "#*-&$%,#-") .',-!$%*!-,) .'#-*$%**-() "##-"$%*(-!) .'.-($%*,-") .(*-($%*+-*)
[26.7ºC] Sens BTUH [kW] .&+-,$%&'-+) .".$%&*-*) ...-&$%&"-,) .*'-($%+,-() .+&-,$%+"-.) .&"$%&(-!) .(*-!$%*+-+) .,,-'$%+(-') .*&-+$%+*)
Power ..-& ..-. .#-' ..-" .. .#-( ..-. .#-( .#-!
85ºF Total BTUH [kW] "..-&$%,.-') "#"-+$%*'-&) .',$%*!-+) "##$%*(-,) .'.-,$%*,-.) .(*-,$%*+-+) .'+-'$%*!-.) .(,-!$%*+-!) .(#-($%*&)
[29.4ºC] Sens BTUH [kW] .&.-,$%&(-,) ..(-&$%&+-!) .#(-($%&.-') .*,-($%+*-') .+#-'$%+.-&) ."'-,$%&() .("-!$%*&-*) .,+-"$%+(-.) .*.$%++-")
Power ..-' ..-, ..-+ ..-! ..-* ..-& ..-, ..-& ..-"
90ºF Total BTUH [kW] "#*-'$%,#-&) .'!-&$%*!-() .'.-.$%*,) .'+-,$%*!) .(,-*$%*+-,) .(#-,$%*"-') .('-*$%**-*) .(.-,$%*&-") .!*-'$%*.-*)
[32.2ºC] Sens BTUH [kW] ."(-!$%&!-!) ..*-!$%&&-') .#,-+$%&.-") .*&-'$%+*-.) .&(-&$%+#-*) ."!-"$%&!-&) .!'-($%*"-!) .,.-,$%+!-&) .+(-,$%+&-*)
Power ."-+ ."-" ." ."-& ." ..-' ."-" ..-' ..-!
95ºF Total BTUH [kW] "##-,$%*(-() .'"-"$%*,-&) .(,-.$%*+-*) .('-&$%**-*) .(.-+$%*&-.) .!*-!$%*.-*) .(+-"$%*+) .!,-*$%*.-!) .!.$%*#-.)
[35.0ºC] Sens BTUH [kW] ."*-'$%&,-') ..&-"$%&&-") .#+-.$%&#-*) .*.-.$%++-&) .&*-($%&'-() ."+-($%&,-,) .!!$%*.-') .*'$%+,-,) .+,-"$%+"-')
Power .&-. ."-( ."-, ."-' ."-! ."-* ."-( ."-* ."-&
100ºF Total BTUH [kW] .'*-&$%*!-") .(!-.$%*+-() .(.-"$%*&-.) .(+$%*&-') .!,-&$%*.-!) .!#-($%*#) .!(-'$%*"-+) .!.-+$%*#-") .,,$%+(-!)
[37.8ºC] Sens BTUH [kW] ."&-"$%&,-.) ..#-!$%&"-+) .#.-($%"'-() .+(-&$%+&-*) .&&-&$%&'-.) .""-,$%&*-') .!+-"$%*.-.) .*,-,$%+*-') .++$%+"-")
Power .&-! .&-* .&-& .&-, .&-& .&-. .&-* .&-" .&
105ºF Total BTUH [kW] .'#$%**-!) .("$%*&-&) .!,-&$%*.-!) .!(-!$%*"-+) .!.-"$%*#-") .,*-'$%+(-,) .!&-!$%*#-') .,,-+$%+(-!) .,.-.$%+!-")
[40.6ºC] Sens BTUH [kW] ."#-,$%&*-&) .#(-+$%&.-() ''-,$%"'-") .+*-!$%+"-!) .&.$%&(-+) ."#-+$%&*-&) .!.-,$%*#-&) .*+-"$%+*-") .+.-($%+.-,)
Power .+-* .+-" .+ .+-& .+ .&-( .+-" .&-' .&-!
110ºF Total BTUH [kW] .(+-($%*+-.) .!!$%*.-') .!.-*$%*#-") .!&-*$%*#-() .,,-"$%+(-!) .,.$%+!-") .,(-+$%+'-&) .,.-&$%+!-&) .*,-&$%+*-()
[43.3ºC] Sens BTUH [kW] ..($%&+-,) .#,-.$%&.-.) '!-,$%"(-,) .+&-"$%+") ."(-!$%&!-!) ..(-&$%&+-!) .,(-+$%+'-&) .*"$%++-*) .&'-!$%+#-')
Power .*-& .+-' .+-! .*-. .+-( .+-, .* .+-! .+-*
115ºF Total BTUH [kW] .!'-*$%*"-,) .!"$%*#-+) .,,-,$%+(-() .,(-"$%+'-&) .,.-"$%+!-") .*,-.$%+*-() .,&-"$%+!-() .*,-&$%+*-() .*.-+$%++-+)
[46.1ºC] Sens BTUH [kW] ..*-,$%&&-') .#&-'$%&#-+) '*-*$%"() .+#-!$%+.-") .",-*$%&!-.) ..,-&$%&+-.) .,&-"$%+!-() .+'-($%+&-') .&!-!$%+#-+)
Power .,-. .*-( .*-* ., .*-, .*-+ .*-( .*-* .*-&
120ºF Total BTUH [kW] .!+-&$%*.-.) .,!$%+(-') .,.-($%+!-+) .,&$%+!-() .*,-"$%+*-() .*.-&$%++-&) .*!-'$%+,-&) .*.-&$%++-&) .+,-,$%+"-')
[48.9ºC] Sens BTUH [kW] ..&-&$%&&-") .#.-($%"'-() '&-,$%"!-+) .&(-+$%+#-,) ."+-+$%&,-+) ..+-+$%&&-*) .*!-'$%+,-&) .+!-!$%+&-&) .&*-($%&'-()
Power .! .,-, .,-+ .,-' .,-* .,-& .,-! .,-+ .,-.
125ºF Total BTUH [kW] .,'-.$%+'-,) .,"$%+!-*) .*,-'$%+,) .*!-($%+,-&) .*.-"$%++-&) .+,-*$%+"-') .*"-($%++-() .+,-&$%+"-') .+.-!$%+.-*)
[51.7ºC] Sens BTUH [kW] ...$%&"-*) ''-($%"'-") '.-!$%",-') .&,-.$%&'-') .""-+$%&*-') .."-*$%&&) .*"-($%++-() .+*-,$%+"-!) .&&-'$%&'-")
Power .!-' .!-, .!-& .!-( .!-+ .!-" .!-! .!-& .!
DR —Depression ratio Total —Total capacity x 1000 BTUH NOTES:
dbE —Entering air dry bulb Sens —Sensible capacity x 1000 BTUH !When the entering air dry bulb is other than 80°F [27°C], adjust the sensible
wbE—Entering air wet bulb Power—KW input capacity from the table by adding [1.10 x CFM x (1 – DR) x (dbE – 80)].
CFM [L/s]
DR !
/012334$546$7089$:;<=;4>104;
Entering Indoor Air @ 80ºF [26.7ºC] dbE !
wbE
71ºF [21.7ºC]
67ºF [19.4ºC]
63ºF [17.2ºC]

11
5644 78893: ;344 76585: <344 766=;: 5644 78893: ;344 76585: <344 766=;: 5644 78893: ;344 76585: <344 766=;:
5; (>?@A%B(C*%7D&: !"#$%&"'$#( !"'$)&"!$)( !"%$*&"!$!( !"%$)&"!$*( !*'$*&*+$+( !*!$)&*+$,( !"!$"&"!$"( !*"$-&*)$"( !')$*&*,$)(
768E9: .>FGH%D&
34 (>?@A%B(C*%7D&: !"'$+&"!$)( !"%$+&"!$*( !*+$,&"%$-( !*)$%&"%$,( !*%$)&*+$"( !*%$"&*+$'( !*)$#&"%$)( !**$'&*)$%( !'+$'&*,$-(
76=E5: .>FGH%D&
3; (>?@A%B(C*%7D&: !"%$,&"!$'( !*+$,&"%$-( !*,$!&"%$'( !*,$'&"%$'( !')$"&*,$)( !'+$)&*,$+( !*,$#&"%$*( !*!$+&*+$-( !',$%&*,$'(
769E<: .>FGH%D&
94 (>?@A%B(C*%7D&: !*+$#&"%$-( !*-$-&"%$%( !*#$#&*)$,( !*#$*&*)$,( !'+$%&*,$#( !',$"&*,$*( !*#$-&*)$,( !*%$*&*+$'( !'#$)&*-$)(
786E6: .>FGH%D&
9; (>?@A%B(C*%7D&: !*-$"&"%$%( !*"$"&*)$"( !**$)&*)$'( !**$"&*)$!( !'-$#&*,$!( !'-$%&*-$)( !**$,&*)$'( !'+$)&*,$+( !'"$,&*-$#(
78;E4: .>FGH%D&
244 (>?@A%B(C*%7D&: !*"$*&*)$"( !*'$*&*+$+( !*'$"&*+$+( !*!$#&*+$#( !'#$!&*-$,( !'"$#&*-$#( !*!$,&*+$-( !',$#&*,$"( !'*$-&*-$'(
785E3: .>FGH%D&
24; (>?@A%B(C*%7D&: !*'$!&*+$,( !*%$'&*+$'( !*%$+&*+$*( !')$,&*+$%( !'*$-&*-$'( !'*$%&*-$%( !')$+&*+$%( !'-$!&*,$%( !''$"&*#$)(
7<4E=: .>FGH%D&
224 (>?@A%B(C*%7D&: !*%$%&*+$!( !'+$!&*,$#( !')$'&*,$)( !',$+&*,$#( !''$'&*#$+( !'!$-&*#$-( !',$)&*,$#( !'"$,&*-$#( !'!$*&*#$#(
7<8E8: .>FGH%D&
22; (>?@A%B(C*%7D&: !',$)&*,$#( !'-$%&*-$)( !',$-&*,$"( !'#$)&*-$)( !'%$,&*#$"( !'%$!&*#$'( !'#$)&*-$)( !'*$*&*-$!( !'%$!&*#$'(
7<=E2: .>FGH%D&
264 (>?@A%B(C*%7D&: !'#$,&*-$+( !'*$+&*-$*( !'-$%&*-$)( !'"$!&*-$"( !!)$*&*#$%( !!+$-&*"$+( !'"$%&*-$*( !'!$)&*#$,( !!)$%&*"$)(
7<3E9: .>FGH%D&
26; (>?@A%B(C*%7D&: !'*$-&*-$'( !'!$,&*#$,( !'"$"&*-$#( !''$'&*#$+( !!,$+&*"$#( !!,$'&*"$*( !''$!&*#$+( !'%$#&*#$*( !!,$+&*"$#(
7;2E5: .>FGH%D&
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ROSS WATER HEATIN CAPACITY – D180

12
II. INSTALLATION
A. GENERAL
1. INSTALLATION — Install this unit in accordance with The American National
Standard Z223.1-latest edition booklet entitled “National Fuel Gas Code,” and the
requirements or codes of the local utility or other authority having jurisdiction.
Additional helpful publications available from the “National Fire Protection
Association” are: NFPA-90A - Installation of Air Conditioning and Ventilating
Systems 1985 or latest edition. NFPA-90B - Warm Air Heating and Air
Conditioning Systems 1984.
These publications are available from:
National Fire Protection
Association, Inc.
1 Batterymarch Park
Quincy, MA 02269-7471
www.nfpa.org
2. PRE-INSTALLATION CHECK-POINTS — Before attempting any installation,
carefully consider the following points:
Structural strength of supporting members
(Rooftop Installation)
Clearances and provision for servicing
Power supply and wiring
Gas supply and piping
Air duct connections and sizing
rain facilities and connections
Location for minimum noise and
vibration - away from bedroom
windows.
Water piping supply length and routing
IMPORTANT: Before operating unit, remove compressor shipping supports
from the compressor base. Failure to remove supports will cause noise and
vibration.
B. H2AC ROOFTO UNIT S ECIAL CONSIDERATIONS
Since the waste-heat recovery/water heating feature of the H2AC rooftop unit only
functions during the cooling mode, the unit should be installed to serve the area of
the structure having the largest cooling run-time, for instance the kitchen area of a
restaurant, in order to provide the greatest water heating and energy saving benefits.
The H2AC rooftop unit is equipped with an outdoor temperature sensor that ener-
gizes the water pump continuously below 35°F to minimize the chance of the water
system freezing, however this is not intended to be the sole method of unit freeze
protection. If the H2AC rooftop unit is installed in a geographic location where
freezing temperature can occur, the water lines, valves, and couplings con-
nected outside the unit must be adequately protected with insulation and heat
tape suitable for the lowest expected temperatures.
Alternately, the unit and all connecting lines can be drained of water and the
unit heat exchanger, pump, and internal piping winterized using a non-toxic
recreational vehicle type of anti-freeze suitable for potable water systems.
The H2AC rooftop unit is equipped with a water leak sensor designed to sense water
that would accumulate in the pan under the water pump and refrigerant-to-water heat
exchanger assembly located on the blower deck. If a leak is sensed in that area an
alarm is triggered on the RTU-C (ClearControl) control board and a water shutoff
relay is energized to activate the optional RXMV-AH electric water shut-off valve. It
is strongly recommended that the RXMV-AH be installed to minimize the chance of
water damage to the structure in case of a water leak in the unit.
LOCATION CONSIDERATIONS
The metal parts of this unit may be subject to rust or deterioration in adverse envi-
ronmental conditions. This oxidation could shorten the equipment’s useful life. Salt
spray, fog or mist in seacoast areas, sulphur or chlorine from lawn watering systems,
and various chemical contaminants from industries such as paper mills and petrole-
um refineries are especially corrosive.
If the unit is to be installed in an area where contaminants are likely to be a
problem, give special attention to the equipment location and exposure.
1. Avoid having lawn sprinkler heads spray directly on the unit cabinet.
DISCONNECT ALL POWER TO
UNIT BEFORE STARTIN MAIN-
TENANCE. FAILURE TO DO SO
CAN CAUSE ELECTRICAL SHOCK
RESULT IN IN PERSONAL
INJURY OR DEATH. RE ULAR
MAINTENANCE WILL REDUCE
THE BUILDUP OF CONTAMI-
NANTS AND HELP TO PROTECT
THE UNIT’S FINISH.
sWARNING
!

13
2. In coastal areas locate the unit on the side of the building away from the waterfront.
3. Shielding by a fence or shrubs may give some protection.
4. Frequent washing of the cabinet, fan blade and coil with fresh water will remove most
of the salt or other contaminants that build up on the unit.
5. Regular cleaning and waxing of the cabinet with an automobile polish will provide
some protection.
6. A liquid cleaner may be used several times a year to remove matter that will not wash
off with water.
Several different types of protective coatings are offered in some areas. These coatings
may provide some benefit, but the effectiveness of such coating materials cannot be veri-
fied by the equipment manufacturer.
The best protection is frequent cleaning, maintenance and minimal exposure to
contaminants.
C. ATTACHING EXHAUST AND COMBUSTION AIR INLET HOODS
IMPORTANT: Do not operate this unit without the exhaust/combustion air inlet hood
properly installed. These hoods are shipped in cartons in the blower compartment
inside the unit and must be attached when the unit is installed. See Figure 1.
To attach exhaust/combustion air inlet hood:
1. Open blower access panel. For location of blower access panel, see Figure 1.
2. Remove exhaust/combustion air inlet hoods from the cartons, located inside the blower
compartment.
3. Close blower access panel.
4. Attach the combustion air inlet/exhaust hoods with screws. Reference Figure 1 for proper
location. Screws are in carton with the hood.
5. Vent the unit using the flue exhaust hood, as supplied from the factory, without alteration
or addition.
D. FILTER RE LACEMENT
This unit is provided with 8 – 20” X 25” x 2” disposable filters. When replacing filters,
ensure they are inserted fully to the back to prevent bypass. See Figure 3.
Recommended supplier of this filter is Glassfloss Industries, Inc. or
AAF International
215 Central Avenue
P.O. Box 35690
Louisville, KY 40232
Phone: [phone]
Part #: 54-42541-04 (20" x 25" x 2")
THESE UNITS ARE DESI NED
CERTIFIED FOR OUTDOOR
INSTALLATION ONLY. INSTALLA-
TION INSIDE ANY PART OF A
STRUCTURE CAN RESULT IN
INADEQUATE UNIT PERFORM-
ANCE AS WELL AS PROPERTY
DAMA E. INSTALLATION INSIDE
CAN ALSO CAUSE RECIRCULA-
TION OF FLUE PRODUCTS INTO
THE CONDITIONED SPACE
RESULTIN IN PERSONAL
INJURY OR DEATH.
sWARNING
!
FI URE 3
COMPONENT LOCATIONS
ST-A1182-04A-00
POWER ENTRY
15-TON

14
E. CLEARANCES
The following minimum clearances must be observed for proper unit performance
and serviceability. Reference Figure 4.
F. ROOFTO INSTALLATION
1. Before locating the unit on the roof, make sure that the roof structure is adequate
to support the weight involved. (See Electrical & Physical Tables in this manual.)
THIS IS VERY IMPORTANT AND THE INSTALLER’S RESPONSIBILITY.
E
D
C
B
A
Recommended
Clearance in. [mm] Location
80 [2032]
18 [457]
18 [457]
18 [457]*
60 [1524]
* Without Economizer 48 [1219] With Economizer
A - Front
B - Condenser Coil
C - Duct Side
D - EvaporatorEnd
E - Above
FI URE 5
FLAT ROOFTOP INSTALLATION, ATTIC OR DROP CEILIN DISTRIBUTIN SYSTEM.
MOUNTED ON ROOFCURB. CURB MUST BE LEVEL.
ST-A1207-02
E
D
C
B
A
Recommended
Clearance in. [mm] Location
80 [2032]
18 [457]
18 [457]
18 [457]*
60 [1524]
* Without Economizer 48 [1219] With Economizer
A - Front
B - Condenser Coil
C - Duct Side
D - EvaporatorEnd
E - Above
FI URE 4
CLEARANCES
ST-A1207-02

15
2. For rigging and roofcurb details, see Figures 6, 7 and 8.
3. The location of the unit on the roof should be such as to provide proper access for
inspection and servicing.
IMPORTANT: If unit will not be put into service i ediately, block off supply and return
air openings to prevent excessive condensation.
G.DUCTING
The installing contractor should fabricate ductwork in accordance with local codes. Use
industry manuals as a guide when sizing and designing the duct system. Contact Air
Conditioning Contractors of America, 2800 Shirlington Road, Suite 300, Arlington, VA
22206, http:/www.acca.org.
Place the unit as close to the conditioned space as possible allowing clearances as indi-
cated. Run ducts as directly as possible to supply and return outlets. Use of non-flamma-
ble weatherproof flexible connectors on both supply and return connections at unit to
reduce noise transmission is recommended.
On ductwork exposed to outside temperature and humidity, use a minimum of 2” of insu-
lation and a vapor barrier. istribution system in attic, furred space or crawl space should
be insulated with at least 2” of insulation. 1/2” to 1” thick insulation is usually sufficient for
ductwork inside the air conditioned space.
Provide balancing dampers for each branch duct in the supply system. Properly support
ductwork from the structure.
IMPORTANT: In the event that the return air ducts must be run through an “unconfined”
space containing other fuel burning equipment, it is imperative that the user/building
owner must be informed against future changes in construction which might change this
to a “confined space.” Also, caution the user/building owner against any future installation
of additional equipment (such as power ventilators, clothes dryers, etc.), within the exist-
ing unconfined and/or confined space which might create a negative pressure within the
vicinity of other solid, liquid, or gas fueled appliances.
CAPACITY TONS
(KW)
CORNER WEIGHTS BY PERCENTAGE
ABCD
A
B
C
D
LIFTING BEAM CABLE OR CHAIN
SPREADER BAR
5/8” [14.9 MM]
SHACKLE
EACH CORNER
47-3/4”
[1213MM]
C
G
C
G
CENTER
OF
GRAVITY
15 [52.8] 26% 29% 18% 27%
56-5/8”
[1438MM]
ST-A1207-25
FI URE 6
LIFTIN DETAIL
DO NOT, UNDER ANY CIRCUM-
STANCES, CONNECT RETURN
DUCTWORK TO ANY OTHER
HEAT PRODUCIN DEVICE SUCH
AS FIREPLACE INSERT, STOVE,
ETC. UNAUTHORIZED USE OF
SUCH DEVICES MAY RESULT IN
FIRE, CARBON MONOXIDE POI-
SONIN , EXPLOSION, PERSONAL
INJURY, PROPERTY DAMA E OR
DEATH.
sWARNING
!

16
H. RETURN AIR
UNIT BASE FRAME
ROOFTOP UNIT
ROOFCURB
ROOF FLASHING
ROOFING
CANT STRIP
ROOF DECK
INSULATION
INSULATION
DUCT
NAILER STRIP
GASKET
] Designates Metric Conversions
G
UNIT
ROOFCURB
[ ] Designates Metric Conversions
G
INSTALL GASKET
DUCT FLANGE NOT
TO EXCEED
1” [25 mm]
T
RETURN DUCT
50-3/4” X 22” [1289 x 559 mm] MAX
SUPPLY DUCT
42” X 23-3/4” [1089 X 603 mm] MAX CAULK ALL JOINTS
WATERTIGHT
NAILING STRIP
ST-A0888-02
ST-A1125-14
FI URE 7
ROOFCURB FI URE 8
ROOFCURB
NEVER ALLOW PRODUCTS OF COMBUSTION OR THE FLUE PRODUCTS
TO ENTER THE RETURN AIR DUCTWORK, OR THE CIRCULATIN AIR SUP-
PLY. ALL RETURN DUCTWORK MUST BE ADEQUATELY SEALED AND
SECURED TO THE FURNACE WITH SHEET METAL SCREWS, AND JOINTS
TAPED. ALL OTHER DUCT JOINTS MUST BE SECURED WITH APPROVED
CONNECTIONS AND SEALED AIRTI HT.
FAILURE TO PREVENT PRODUCTS OF COMBUSTION FROM BEIN CIRCU-
LATED INTO THE LIVIN SPACE CAN CREATE POTENTIALLY HAZARDOUS
CONDITIONS, INCLUDIN CARBON MONOXIDE POISONIN THAT COULD
RESULT IN PERSONAL INJURY OR DEATH.
sWARNING
!

17
III. GAS SU LY, CONDENSATE DRAIN AND
III. I ING
A. GAS CONNECTION
IMPORTANT: Connect this unit only to gas supplied by a commercial utility.
1. Install gas piping in accordance with local codes and regulations of the local utili-
ty company. In the absence of local codes, the installation must conform to the
specifications of the National Fuel Gas Code, ANSI Z223.1 - latest edition.
NOTE: The use of flexible gas connectors is not permitted.
2. Connect the gas line to the gas valve supplied with unit. Routing can be through
the gas pipe opening shown in Figure 9 or through the base as shown in Figure
13.
3. Size the gas line to the furnace adequate enough to prevent undue pressure
drop. o not use less than 1/2” pipes.
4. Install a drip leg or sediment trap in the gas supply line as close to the unit as
possible.
5. Install an outside ground joint union to connect the gas supply to the control
assembly at the burner tray.
6. Gas valves have been factory installed. Install a manual gas valve where local
codes specify a shut-off valve outside the unit casing. (See Figure 9 and Figure
13.)
7. Make sure piping is tight. A pipe compound resistant to the action of lique-
fied petroleum gases must be used at all threaded pipe connections.
8. IMPORTANT: any additions, changes or conversions required for the furnace to
satisfactorily meet the application should be made by a qualified installer, service
agency or the gas supplier, using factory-specified or approved parts. In the com-
monwealth of Massachusetts, installation must be performed by a licensed
plumber or gas fitter for appropriate fuel.
FI URE 9
SU ESTED AS PIPIN
Nominal
Iron Pipe
Size,
Inches
Equivalent Length of Pipe, Feet
10 20 30 40 50 60 70 80
1/2 132 92 73 63 56 50 46 43
3/4 278 190 152 130 115 105 96 90
1 520 350 285 245 215 195 180 170
11/4 1,050 730 590 500 440 400 370 350
11/2 1,600 1,100 890 760 670 610 560 530
TABLE 1
AS PIPE CAPACITY TABLE (CU. FT./HR. NATURAL AS @ 0.30 IWC
[INCHES OF WATER COLUMN] PRESSURE DROP)
FROM GAS
METER
*Factory supplied grommet must be utilized.
MANUAL GAS
SHUT-OFF
VALVE
UNIT GAS SUPPLY
CONNECTION *
ROOF OR ROUND LEVEL INSTALLATION
IMPORTANT: Disconnect the furnace and its individual shutoff valve fro the gas
supply piping during any pressure testing of that syste at test pressures in excess
of 1/2 pound per square inch gauge or isolate the syste fro the gas supply piping
syste by closing its individual anual shutoff valve during any pressure testing of
this gas supply syste at pressures equal to or less than 1/2 PSIG.

18
TO CHECK FOR AS LEAKS, USE A SOAP AND WATER SOLUTION OR OTHER
APPROVED METHOD. DO NOT USE AN OPEN FLAME.
IMPORTANT: Check the rating plate to ake certain the appliance is equipped to burn
the type of gas supplied. Care should be taken after installation of this equip ent that the
gas control valve not be subjected to high gas supply line pressure.
In making gas connections, avoid strains as they may damage the gas controls. A backup
wrench is required to be used on the valve to avoid damage. o not overtighten the con-
nection.
The capacities of gas pipe of different diameters and lengths in cu. ft. per hr. with pres-
sure drop of 0.3 in. and specific gravity of 0.60 (natural gas) are shown in Table 1.
After determining the pipe length, select the pipe size which will provide the minimum
cubic feet per hour re quired for the gas input rating of the furnace. By formula:
Gas Input of Furnace
(BTU/HR)
Cu. Ft. er Hr. Required = Heating Value of Gas
(BTU/FT3)
The gas input of the furnace is marked on the furnace rating plate. The heating value of
the gas (BTU/FT3) may be determined by consulting the local natural gas utility or the L.P.
gas supplier.
B. L CONVERSION
Convert the unit to use liquefied petroleum (LP) gas by replacing with the stem/spring
assembly supplied in the conversion kit. The LP gas valve maintains the proper manifold
pressure for LP gas. The correct burner LP orifices are included in the kit.
See Figure 10A for component locations.
NOTE: Order the correct LP conversion kit from the furnace manufacturer. See Conversion
Kit Index shipped with unit for proper LP kit number. Furnace conversion to LP as
must be performed by a qualified technician.
DO NOT USE AN OPEN FLAME TO
CHECK FOR LEAKS. THE USE OF
AN OPEN FLAME CAN RESULT IN
FIRE, EXPLOSION, PROPERTY
DAMA E, PERSONAL INJURY OR
DEATH.
sWARNING
!
THIS UNIT IS EQUIPPED AT THE
FACTORY FOR USE ON NATURAL
AS ONLY. CONVERSION TO LP
AS REQUIRES A SPECIAL KIT
SUPPLIED BY THE DISTRIBUTOR
OR MANUFACTURER. MAILIN
ADDRESSES ARE LISTED ON THE
FURNACE RATIN PLATE, PARTS
LIST AND WARRANTY. FAILURE
TO USE THE PROPER CONVER-
SION KIT CAN CAUSE FIRE, CAR-
BON MONOXIDE POISONIN ,
EXPLOSION, PERSONAL INJURY,
PROPERTY DAMA E OR DEATH.
sWARNING
!
FI URE 10A
HEAT EXCHAN ER COMPONENT IDENTIFICATION
ST-A1125-13

19
Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum
gases (at 11 inches water column inlet pressure).
(Based on a ressure Drop of 0.5 Inch Water Column)
TABLE 2
LP AS PIPE CAPACITY TABLE (CU. FT./HR.)
Nominal
Iron ipe
Size, Inches 10 20 30 40 50 60 70 80 90 100 125 150
275 189 152 129 114 103 96 89 83 78 69 63
567 393 315 267 237 217 196 182 173 162 146 132
1,071 732 590 504 448 409 378 346 322 307 275 252
2,205 1,496 1,212 1,039 913 834 771 724 677 630 567 511
3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976 866 787
6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496
1/2
3/4
1
1-1/4
1-1/2
2
Length of ipe, Feet
Example (L ): Input BTU requirement of unit, 150,000
Equivalent length of pipe, 60 ft. = 3/4” I S required.
FI URE 10B
HONEYWELL VR8305Q4120 TWO STA E AS VALVE
C. ADJUSTING OR CHECKING FURNACE IN UT
– Natural as Line Pressure 5” - 10.5” W.C.
– LP as Line Pressure 11” - 13” W.C.
– Natural as Manifold Pressure 3.5” W.C
– LP as Manifold Pressure - 10” W.C.
Supply and manifold pressure taps are located on the gas valve body 1/8” N.P.T. and
on the manifold. See Figure 10B.
Use a properly calibrated manometer gauge for accurate gas pressure readings.
Only small variations in the gas flow should be made by means of the pressure regula-
tor adjustment. Furnaces functioning on LP gas must be set by means of the tank or
branch supply regulators. The furnace manifold pressure should be set at 10” W.C. at
the gas control valve.
To adjust the pressure regulator, remove the regulator vent cover and turn the adjust-
ment screw clockwise to increase pressure or counterclockwise to decrease pressure.
See Figure 10B. Then replace the regulator vent cover securely.
Any necessary major changes in the gas flow rate should be made by changing the size
of the burner orifices. To change orifice spuds, shut off the manual main gas valve and
remove the gas manifold.
For elevations up to 2,000 feet, rating plate input ratings apply. For high altitudes (eleva-
tions over 2,000 ft.), see conversion kit index 92-21519-XX for derating and orifice spud
sizes.
Check of input is important to prevent over-firing of the furnace beyond its
design-rated input. NEVER SET INPUT ABOVE THAT SHOWN ON THE RATIN
PLATE. Use the following table or formula to determine input rate.
INLET PRESSURE TAP - 1/8 NPT GAS INLET - 3/4“ [25.4] FNPT
OR ERING
SPECIFICATION
LABEL
OUTLET PRESSURE
TAP - 1/8 NPT
LOW STAGE A JUSTMENT
UN ER VENT CAP
WHEN INSTALLING THE GAS INLET PIPE, A BACKUP
WRENCH MUST BE USED ON THE GAS VALVE TO
AVOID DAMAGE.
HIGH STAGE A JUSTMENT
UN ER VENT CAP
GROUN TERMINAL
2-STAGE
OPERATOR

20
Heating Value of Gas
(BTU/Cu. Ft.) x 3600
Cu. Ft. er Hr. Required = Time in Seconds
(for 1 Cu. Ft.) of Gas
Start the furnace and measure the time required to burn one cubic foot of gas. Prior to
checking the furnace input, make certain that all other gas appliances are shut off, with
the exception of pilot burners. Time the meter with only the furnace in operation.
IMPORTANT NOTE FOR ALTITUDES ABOVE 2,000 FEET (610 METERS): The main
burner orifices in your furnace and in these kits are sized for the nameplate input and
intended for installations at elevations up to 2,000 feet in the USA or Canada, or for ele-
vations of 2,000 - 4,500 feet (610 -1,373 meters) in Canada if the unit has been derated
at the factory. For elevations above 2,000 feet (610 meters) IN THE USA ONLY (see
ANSI-Z223.1), the burner orifices must be sized to reduce the input 4% for each 1,000
feet (305 meters) above sea level.
NOTICE: DERATIN OF THE HEATIN INPUT FOR HI H ALTITUDE IN THE FIELD
IS UNLAWFUL IN CANADA (REFER TO CAN/C A 2.17). UNITS INSTALLED IN ALTI-
TUDES REATER THAN 2,000 FEET (610 METERS) MUST BE SHIPPED FROM THE
FACTORY OR FROM A FACTORY AUTHORIZED CONVERSION STATION WITH THE
HEATIN INPUT DERATED BY 10% SO AS TO OPERATE PROPERLY IN ALTITUDES
FROM 2,000 - 4,500 FEET (610 - 1,373 METERS).
250,000 ONE 13.0 14.4 15.0 15.8 36.0
TEN 2 10 2 24 2 30 2 38 6 0
ONE 10.8 12.0 12.5 13.2 30.0
300,000 TEN 1 48 2 0 2 5 2 12 5 0
ONE 9.3 10.3 10.7 11.3 25.7
350,000 TEN 1 33 1 43 1 47 1 53 4 17
ONE 8.1 9.0 9.36 9.9 22.5
400,000 TEN 1 21 1 30 1 36 1 39 3 45
METER TIME IN MINUTES AND SECONDS FOR NORMAL
IN UT RATING OF FURNACES EQUI ED FOR NATURAL
OR L GAS
IN UT
BTU/HR
METER
SIZE
CU. FT.
HEATING VALUE OF GAS BTU ER CU. FT.
900 1000 1040 1100 2500
MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC.
TABLE 3 FI URE 11
CONDENSATE DRAIN
DO NOT OVERTI HTEN DRAIN FITTIN
D.CONDENSATE DRAIN
IMPORTANT: Install a condensate trap to ensure proper condensate drainage. See
Figure 11.
The condensate drain pan has a threaded female 1 inch NPT (11.5 TPI) connection.
Consult local codes or ordinances for specific requirements of condensate drain piping
and disposal.
• To use the removable drain pan feature of this unit, some of the condensate line joints
should assembled for easy removal and cleaning.
• Use a thin layer of Teflon tape or paste on drain pan connections and install only hand
tight.
• o not over tighten drain pan connections as damage to the drain pan may occur.
• rain line MUST NOT block service access panels.
• rain line must be no smaller than drain pan outlet and adequately sized to accommo-
date the condensate discharge from the unit.
• rain line should slope away from unit a minimum of 1/8” per foot to ensure proper
drainage.
• rain line must be routed to an acceptable drain or outdoors in accordance with local
codes.
• o not connect condensate drain line to a closed sewer pipe.
• rain line may need insulation or freeze protection in certain applications.
IV. WIRING
A. OWER SU LY
1. All wiring should be made in accordance with the National Electrical Code.
Consult the local power company to determine the availability of sufficient power to
operate the unit. Check the voltage at power supply to make sure it corresponds to
TURN OFF THE MAIN ELECTRI-
CAL POWER AT THE BRANCH
CIRCUIT DISCONNECT CLOSEST
TO THE UNIT BEFORE ATTEMPT-
IN ANY WIRIN . FAILURE TO DO
SO CAN CAUSE ELECTRICAL
SHOCK RESULTIN IN PERSON-
AL INJURY OR DEATH.
sWARNING
!