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RV Products 6536 SERIES Service Manual

Two ton packaged heat pumps
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SERVICE MANUAL
FOR
6536 "-" AND "A" SERIES
TWO TON PACKAGED HEAT PUMPS

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Summary of Contents for RV Products 6536 SERIES

  • Page 1 SERVICE MANUAL 6536 “-” AND “A” SERIES TWO TON PACKAGED HEAT PUMPS...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Warnings ..............Accessibility Of Appliance .

  • Page 3: Accessibility Of Appliance

    2. ACCESSIBILITY OF APPLIANCE The accessibility of this appliance will vary from one technicians judgement, the best method of attaining access to installation to another. It shall be left to the service perform service. 3. UNIT DIMENSIONS AND SPECIFICATIONS PACKAGE AIR CONDITIONER MODEL NUMBER BREAKDOWN FOLLOWS: Revision Letter Model Series...
  • Page 4 4. UNIT SPECIFICATIONS AND IDENTIFICATION...

  • Page 5: Unit Depiction Figures

    5. UNIT DEPICTION FIGURES...

  • Page 6: Thermostat Specifications

    6. THERMOSTAT SPECIFICATIONS THERMOSTAT - 6795B3451 SUB-BASE - 7330-3401 SET TEMP. RANGE: 55 TO 90 DEGREES F. DISPLAY TEMPERATURE: -20 TO 160 DEGREES F. SCALE: DEGREES FAHRENHEIT DISPLAY FORMAT: LIQUID CRYSTAL DISPLAY RESOLUTION: ONE DEGREE F. ACCURACY: ± 2% OF DISPLAY TEMPERATURE RANGE SAMPLING RATE: EVERY 30 SECONDS POWER SOURCE:...

  • Page 7: Wall Thermostat - 6536-335

    7. WALL THERMOSTAT - 6536-335* A. APPLICATION The 6536-335* thermostat is intended for use with an RV receptacle for the 3 pin plug. RV Products suggests the Products 2 stage heat pump. thermostat wiring be minimum 18 gauge. The furnace control circuit must not exceed 1 amp.
  • Page 8 In gas heat mode, the gas furnace will provide the only source of heat and the heat pump is locked out. NOTE The temperature displays in degrees Fahrenheit as a factory set default (See Figure 2). To display in degrees Celsius, move the jumper marked “F” and “C”...
  • Page 9 6536-335* 2-STAGE HEAT PUMP WITH BACKUP HEAT THERMOSTAT OPERATION TABLE Mode Fan Mode Fan Speed Calling Operation Switch Switch Switch Cool Auto No functions occur in this mode Cool Auto Stage 1 ID fan low, compressor #1 and OD blower low 1 Degree Above Set cycle as needed Cool...

  • Page 10: Thermostat Control Panel

    8. THERMOSTAT CONTROL PANEL A. OPERATION Your air conditioner is operated from the control panel located Cooling Fan Switch - The fan switch has four on the electronic wall mounted thermostat. When the furnace positions from which to control the operation of the is connected to this thermostat, it will be operated from the cooling blower.
  • Page 11 B. TESTING Place the thermostat system switch into the “OFF” position. COOLING Once all safety precautions have been met, reinstate power to all systems; thermostat, cooling and heating. Move the system switch to COOL. The display will indicate room temperature. Adjust the setpoint above room temperature.

  • Page 12: Indoor Blower Motor Removal

    10. INDOOR BLOWER MOTOR REMOVAL Remove indoor blower access panel. Remove motor assembly from scroll. Disconnect wiring from motor terminal block and Remove blower wheel and motor mounting bracket. capacitor. Note: Upon reassembly, the references made on Remove 4 screws from venturi (See #1, Figure 7). Figures 7 and 8 shall be used for proper reassembly.

  • Page 13: Outdoor Blower Motor Removal

    END VIEW Wheel must be mounted with a minimum of 5/16" clearance to scroll sides. Apply grease to motor shaft before assembling wheel. Torque set screw on flat of shaft to 110 #10 in. lbs. 11. OUTDOOR BLOWER MOTOR REMOVAL Remove 4 screws from venturi (See #1, Figure 10).
  • Page 14 BOTTOM VIEW Wheel must be mounted with a minimum of 1/4" clearance to both venturis. Apply grease to motor shaft before assembling wheel. Torque set screw on flat of shaft to 110 #10 in. lbs.
  • Page 15 SIDE VIEWS Position motor with terminal block opposite motor mount clamp. Torque nut to 65 in. lbs. min. Ground wire terminal assembles between screw head and washer. Wrap wire around motor mount leg to take up slack. Wire tie capacitor wires to mount leg.

  • Page 16: By Flow Restrictor Replacement

    12. BY-FLOW RESTRICTOR REPLACEMENT Remove top panel. Unbraze by-flow restrictor from points 16. Make note of plumbing locations for new restrictor. Must be Remove Section C (See Figure 11). installed in same manner. (Note to protect any wiring that could come into contact with the torch flame or Remove outdoor blower.
  • Page 17 13. INDOOR COIL REPLACEMENT Refer to Outdoor Coil Replacement (Steps 1 Remove screws (See #7, #8 & #9, Figure 12). through 7). Evaporator coil can now be removed. Remove screws from bottom of step panel (See #6, Note: Upon reassembly, the references made on Figure 12).

  • Page 18: Compressor Replacement

    14. OUTDOOR COIL REPLACEMENT Remove top panel. Make note of plumbing locations. The plumbing will have to go back to the same locations on the new Remove screws along wirebox side of coil (See #10, coil. Figure 12). Unbraze discharge and liquid lines at points #2 and Remove corner panel (See Section C, Figure 11).
  • Page 19 17. WIRING DIAGRAMS - THERMOSTAT Diagram 1976E119 Electronic Wall Thermostat Assembly (12 VDC) - 6536-3451 Thermostat plug positions on the p.c. board. If no voltage is detected at the p.c. board connector, check for voltage at the thermostat. Note: All functions of this heat pump are subject to thermostat time delays according to the operation manual.

  • Page 20: Wiring Diagram

    18. WIRING DIAGRAM 6536 Series Two Ton Packaged Heat Pump - 2 Compressor...

  • Page 21: Wiring Diagram

    18A. WIRING DIAGRAM 6536A Series Two Ton Packaged Heat Pump...

  • Page 22: Wirebox Component Checkout (6536 Models)

    19. WIREBOX COMPONENT CHECKOUT 6536 “-” MODEL...

  • Page 23: Wirebox Component Checkout (6536A Models)

    19A. WIREBOX COMPONENT CHECKOUT 6536 “A” MODELS...

  • Page 24: Service Problems And Possible Solutions

    20. SERVICE PROBLEMS AND POSSIBLE SOLUTIONS COOLING MODE Problems Possible Solutions Nothing Runs - Cooling Mode No A/C Voltage, No 12 VDC, Thermostat, Wiring, P.C. Board Cooling Freeze Thermistor - (Insufficient Indoor Air Flow), IDFM Runs, No Compressor, No ODFM Thermostat, Wiring, Compressor, Contactor, P.C.
  • Page 25 21. ELECTRICAL FLOW CHARTS 6536 SERIES With the use of these flow charts, you will be able to quickly To use these flow charts, start at the top left corner. Using a identify a non-working problem. Determine if the problem is volt-ohm meter, check what is indicated in that box.
  • Page 26 A. 6536 SERIES OPERATION SEQUENCE COOLING MODE...
  • Page 27 COOLING MODE CHECK/NO GREEN L.E.D. LIGHT FY/Y CIRCUIT TO THE THERMOSTAT Note: The green light on the 6536A model has some new functions: If the light is on solid, then everything is OK. If the light is blinking slowly, the unit is in a 3 minute time delay. If the light is blinking fast, there is either no line voltage to Circuit #1 or one of the thermistors are open.
  • Page 28 I.D. BLOWER LOW SPEED THERMOSTAT ON LOW FAN COOL ONLY Note: All operating functions subject to thermostat time delays.
  • Page 29 I.D. BLOWER HIGH SPEED THERMOSTAT ON HIGH FAN COOL ONLY Note: All operating functions subject to thermostat time delays.
  • Page 30 COMPRESSOR #1 CHECKOUT THERMOSTAT CALLING FOR COMPRESSOR COOLING ONLY Note: All operating functions subject to thermostat time delays.
  • Page 31 COMPRESSOR #2 CHECKOUT THERMOSTAT CALLING STAGE 2 COOLING ONLY Note: All Operating Functions Subject To Thermostat Time Delays...
  • Page 32 CHECKOUT OUTDOOR BLOWER LOW SPEED HEATING AND COOLING MODES...
  • Page 33 CHECKOUT OUTDOOR BLOWER HIGH SPEED HEATING AND COOLING MODES...
  • Page 34 B. 6536 SERIES OPERATION SEQUENCE HEATING MODE...
  • Page 35 HEAT/MODE CHECKOUT/NO GREEN L.E.D. LIGHT F/F CIRCUIT TO THE THERMOSTAT...
  • Page 36 HEAT MODE I.D. BLOWER CHECKOUT Note: High Fan Speed Is Energized Only. All Operating Functions Subject To Thermostat Time Delays.
  • Page 37 COMPRESSOR #1 CHECKOUT HEAT MODE Note: All Operating Functions Subject To Thermostat And P.C. Board Time Delays. Sub-base Must Be In The Electric Mode.
  • Page 38 HEAT PUMP COMPRESSOR #2 CHECKOUT (HEAT MODE) Note: All Operating Functions Subject To Thermostat And P.C. Board Time Delays. Sub-base Must Be In Electric Mode.
  • Page 39 REVERSING VALVE CHECKOUT HEAT MODE Note: Reversing Valve Is Energized In The Heat Mode And Is Subject To Thermostat And P.C. Board Time Delays. Note: If Compressor And Fan Motors Not Running, Refer To Proper Checkouts. Once The Reversing Valve Has Energized, The P.C. Board Locks The Valve Into An Energized Position Until The Wall Thermostat Is Put In The Cool Position And Actually Has A Demand For Cooling, Sending 12 VDC Down Y1.
  • Page 40 RV Products A Division of Airxcel, Inc. P.O. Box 4020 Wichita, KS 67204 1976C281 (8-05) PP...

This manual is also suitable for:

6536-a series

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