Rheem A180CL25E Installation Instructions Manual
Rheem A180CL25E Installation Instructions Manual

Rheem A180CL25E Installation Instructions Manual

Combination heating and cooling rooftop units 15, 20 & 25 ton (-)kkb and 15 & 20 ton (-)kmb units

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INSTALLATION INSTRUCTIONS

FOR COMBINATION HEATING
AND COOLING ROOFTOP UNITS
15, 20 & 25 TON (-)KKB
AND 15 & 20 TON (-)KMB UNITS
!
Recognize this symbol as an indication of Important Safety Information!
!
WARNING
If the information in these instructions is not followed exactly, a
fire or explosion may result, causing property damage, personal
injury or death.
!
WARNING
PROPOSITION 65: THIS FURNACE CONTAINS FIBERGLASS
INSULATION. RESPIRABLE PARTICLES OF FIBERGLASS ARE
KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER.
EXHAUST GAS FROM THIS FURNACE CONTAINS CHEMICALS,
INCLUDING CARBON MONOXIDE, KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE BIRTH DEFECTS OR OTHER REPRO-
DUCTIVE HARM.
!
WARNING
THESE INSTRUCTIONS ARE
INTENDED AS AN AID TO
QUALIFIED 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, CARBON
MONOXIDE POISONING,
EXPLOSION, PROPERTY
DAMAGE, PERSONAL INJURY
OR DEATH.
DO NOT DESTROY.
PLEASE READ CAREFULLY AND KEEP
IN A SAFE PLACE FOR FUTURE
REFERENCE BY A SERVICEMAN OR
USER OF THIS APPLIANCE.
!

FOR YOUR SAFETY

— Do not store or use gasoline or other
flammable vapors and liquids, or other
combustible materials in the vicinity of this
or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
• Do not return to your home until
authorized by the gas supplier or fire
department.
— DO NOT RELY ON SMELL ALONE TO
DETECT LEAKS. DUE TO VARIOUS
FACTORS, YOU MAY NOT BE ABLE TO
SMELL FUEL GASES.
• U.L. recognized fuel gas and CO
detectors are recommended in all
applications, and their installation should
be in accordance with the manufacturer's
recommendations and/or local laws,
rules, regulations, or customs
— Improper installation, adjustment, alteration,
service or maintenance can cause injury,
property damage or death. Refer to this
manual. Installation and service must be
performed by a qualified installer, service
agency or the gas supplier.
92-23577-56-01
SUPERSEDES 92-23577-56-00

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Summary of Contents for Rheem A180CL25E

  • Page 1: Installation Instructions

    INSTALLATION INSTRUCTIONS FOR COMBINATION HEATING AND COOLING ROOFTOP UNITS 15, 20 & 25 TON (-)KKB AND 15 & 20 TON (-)KMB UNITS Recognize this symbol as an indication of Important Safety Information! WARNING If the information in these instructions is not followed exactly, a fire or explosion may result, causing property damage, personal injury or death.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS I. SPECIFICATIONS INTRODUCTION A. GENERAL Page No. WARNING I. SPECIFICATIONS THE MANUFACTURER’S WARRANTY The Combination Gas Heating/Electric Components Cooling Rooftop is available in 250,000 DOES NOT COVER ANY DAMAGE OR Unit Dimensions AND 350,000 BTUH heating input with DEFECT TO THE AIR CONDITIONER Electrical &...
  • Page 3 Unit FIGURE 1. BOTTOM VIEW Dimensions FOR CLEARANCES SEE PAGE 12, FIGURE 12. IMPORTANT: THIS UNIT MUST BE MOUNTED LEVEL IN BOTH DIRECTIONS TO ALLOW WATER TO DRAIN FROM THE CONDENSER SECTION AND CONDENSATE PAN. ST-A0886-02 FIGURE 2. SUPPLY AND RETURN DIMENSIONS FOR DOWNFLOW APPLICATIONS ST-A0886-07...
  • Page 4: Components

    FIGURE 3. COMPONENT LOCATIONS & DIMENSIONS GAS SUPPLY (SIDE ENTRY) 3/4” INLET ST-A0886-04 FIGURE 4. COMPONENT LOCATIONS & DIMENSIONS ST-A0886-06 FIGURE 5. COMPONENT LOCATIONS ST-A0886-27...
  • Page 5 FIGURE 6. DIMENSIONS ST-A0886-05 FIGURE 7. COMPONENT ACCESS LOCATIONS & DIMENSIONS ST-A0886-03 FIGURE 8. COMPONENT LOCATIONS ST-A0886-28...
  • Page 11: Location Considerations

    II. INSTALLATION A. GENERAL If the unit is to be installed in an area 3. A liquid cleaner may be used several where contaminants are likely to be a times a year to remove matter that will 1. INSTALLATION — Install this unit in problem, give special attention to the not wash off with water.
  • Page 12: Cover Panel Installation

    D.COVER PANEL E. FILTER REPLACEMENT (Typical outdoor slab installation is shown in Figure 9.) INSTALLATION/ This unit is provided with 3 - 18” X 18” X 2” 1. Select a location where external CONVERSION PROCEDURE and 3 - 18” X 24” X 2” disposable filters. water drainage cannot collect around When replacing filters, ensure they are unit.
  • Page 13: Clearances

    E. CLEARANCES The following minimum clearances must be observed for proper unit performance and serviceability. Reference Figure 12. FIGURE 12. CLEARANCES ST-A0886-09...
  • Page 14: Rooftop

    G.ROOFTOP INSTALLATION FIGURE 13A. Flat Rooftop Installation, Attic or Drop Ceiling Distributing System. Mounted on Roofcurb. Curb must be level. 1. Before locating the unit on the roof, make sure that the roof structure is adequate to support the weight involved.
  • Page 15: Return Air

    RETURN AIR space as possible allowing clearances TAPED. ALL OTHER DUCT JOINTS as indicated. Run ducts as directly as MUST BE SECURED WITH APPROVED possible to supply and return outlets. WARNING CONNECTIONS AND SEALED Use of non-flammable weatherproof AIRTIGHT. NEVER ALLOW PRODUCTS OF flexible connectors on both supply and FAILURE TO PREVENT PRODUCTS OF COMBUSTION OR THE FLUE...
  • Page 16 III. GAS SUPPLY, CONDENSATE DRAIN AND PIPING A. GAS CONNECTION IMPORTANT: Disconnect the furnace IMPORTANT: Check the rating plate to and its individual shutoff valve from the make certain the appliance is equipped to IMPORTANT: Connect this unit only to gas supply piping during any pressure burn the type of gas supplied.
  • Page 17 B. LP CONVERSION TABLE 4 WARNING LP GAS PIPE CAPACITY TABLE (CU. FT./HR.) Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum gases THIS UNIT IS EQUIPPED AT THE (at 11 inches water column inlet pressure). FACTORY FOR USE ON NATURAL GAS (Based on a Pressure Drop of 0.5 Inch Water Column) ONLY.
  • Page 18 TABLE 5 METER TIME IN MINUTES AND SECONDS FOR NORMAL INPUT RATING OF FURNACES EQUIPPED FOR NATURAL OR LP GAS METER HEATING VALUE OF GAS BTU PER CU. FT. INPUT SIZE 1000 1040 1100 2500 BTU/HR CU. FT. MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC. MIN. SEC. 250,000 13.0 14.4...
  • Page 19 IV. WIRING TABLE 6 A.POWER SUPPLY AWG Copper AWG Aluminum Connector Type and Size Wire Size Wire Size (or equivalent) WARNING T & B Wire Nut T & B Wire Nut TURN OFF THE MAIN ELECTRICAL Sherman Split Bolt TSP6 POWER AT THE BRANCH CIRCUIT Sherman Split Bolt TSP4...
  • Page 20: Hook-Up

    FIGURE 21. BASE ENTRY LOCATIONS FIGURE 22. TYPICAL THERMOSTAT WIRING ST-A0886-14 WIRE SIZE, AWG CONDUIT SIZE 1/2( 1/2( 1/2( 3/4( 1-1/4( 1-1/4( 1-1/2( 1-1/2( HOLE SIZE 7/8( 7/8( 7/8( 1-31/32( 1-23/64( 1-23/64( 1-23/32( 1-23/32( 1-31/32( 1-31/32( 2-15/32( 2-15/32( NOTES: 1. DETERMINE REQUIRED WIRE SIZE FROM MINIMUM CIRCUIT AMPACITY SHOWN IN INSTALLATION & OPERATING INSTRUCTION. 2.
  • Page 21: Normal Furnace Operating Sequence

    V. FURNACE SECTION CONTROLS AND IGNITION SYSTEM NORMAL FURNACE thermostat input. If only W1 is called 4. Control initiates 5 second inducer for, W2 is de-energized and the postpurge and 90 second indoor OPERATING SEQUENCE control starts a 30 second off delay on blower delay off.
  • Page 22: Operating Instructions

    MANUAL RESET The integrated furnace control is 8. Replace the control door. equipped with diagnostic LED. The LED 9. Turn on all electric power to the OVERTEMPERATURE is lit continuously when there is power to appliance. CONTROL the control, with or without a call for heat. 10.
  • Page 23: Cooling Mode

    VI. COOLING SECTION OPERATION COOLING MODE 2. Inputs Y1, Y2 and G to the control are B. Call for second stage cooling. After energized. first stage cooling established: A. Call for first stage cooling starting from A4. 3. Control senses Y1, Y2 and G, after 1 1.
  • Page 24: Replacement Parts

    LUBRICATION 2. Shine a flashlight on the evaporator 5. Inspect the circulating air blower coil (both sides) and inspect for wheel and motor for accumulation of IMPORTANT: DO NOT attempt to accumulation of lint, insulation, etc. lint, dirt or other obstruction and clean lubricate the bearings on the blower it necessary.
  • Page 27 FIGURE 24 COOLING TROUBLE SHOOTING CHART WARNING DISCONNECT ALL POWER TO UNIT BEFORE SERVICING. CONTACTOR MAY BREAK ONLY ONE SIDE. FAILURE TO SHUT OFF POWER CAN CAUSE ELECTRICAL SHOCK RESULTING IN PERSONAL INJURY OR DEATH. SYMPTOM POSSIBLE CAUSE REMEDY Unit will not run •...
  • Page 28 FIGURE 25 FURNACE TROUBLESHOOTING GUIDE (COMBINATION HEATING AND COOLING UNITS WITH DIRECT SPARK IGNITION) WARNING HAZARDOUS VOLTAGE DISCONNECT POWER BEFORE LINE VOLTAGE SERVICING. CONNECTIONS SERVICE MUST BE BY A TRAINED, QUALIFIED SERVICE TECHNICIAN. START SET THERMOSTAT TO CALL FOR HEAT SET FAN SWITCH TO AUTO •...
  • Page 29 NOTE: IF THE SYSTEM GOES INTO LOCKOUT, WAIT 30 SECONDS AND RESET THE SYSTEM. REPLACE SENSOR MAIN BURNER FLAME SUSTAINED • CHECK FLAME SENSOR POSITION AND CONDITION • CLEAN FLAME SENSOR WITH STEEL WOOL • CHECK FLAME SENSOR WIRES AND CONNECTIONS REPLACE IGNITION CONTROL •...
  • Page 30 FIGURE 26...
  • Page 31 FIGURE 27...
  • Page 32 FIGURE 28...
  • Page 33 FIGURE 29...
  • Page 34 SYSTEM CHARGE CHARTS FIGURE 30...
  • Page 35 SYSTEM CHARGE CHARTS FIGURE 31...
  • Page 36 SYSTEM CHARGE CHARTS FIGURE 32...
  • Page 37 Model Number Serial Number Date of Original Installation KEEP THIS WARRANTY FOR YOUR RECORDS. DO NOT MAIL. RHEEM AIR CONDITIONING DIVISION A Division of Rheem Manufacturing Company P.O. Box 17010, 5600 Old Greenwood Road, Fort Smith, Arkansas 72917-7010 CM 401...

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