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RV Products 8535 SERIES Service Manual

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SERVICE MANUAL
FOR
7535, 8534, 8535 SERIES
HEAT PUMPS

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Summary of Contents for RV Products 8535 SERIES

  • Page 1 SERVICE MANUAL 7535, 8534, 8535 SERIES HEAT PUMPS...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Warnings ............Unit Specifications .

  • Page 3: Warnings

    I. WARNINGS IMPORTANT NOTICE WARNING - SHOCK HAZARD These instructions are for the use of qualified individuals To prevent the possibility of severe personal injury or specially trained and experienced in installation of this type equipment damage due to electrical shock, always be sure the equipment and related system components.

  • Page 4: Unit Specifications

    II. UNIT SPECIFICATIONS Cooling Capacity 15,000 (Nominal BTUH) Heating Capacity In Heat Pump Mode 12,700 (Nominal BTUH at 47°F) Heating Capacity Of Electric Heat Strip 5,600 BTUH Electrical Rating 115 VAC, 60 HZ, 1 Phase Compressor Cooling Full Load 12.4 Fan Motor Amps At A.R.I.

  • Page 5: Heat Pump Operation With 7530-716 Or 8530-715 Standard

    III. HEAT PUMP OPERATION WITH 7530-716 OR 8530-715 STANDARD CEILING ASSEMBLIES If your RV air conditioner is operated from the control panel located in the ceiling assembly, then there are three controls on the ceiling assembly that help you control the air conditioner.
  • Page 6 the vehicle for more efficient circulation and faster The air conditioning compressor is unable to start against high pressure. Therefore, once the air conditioner is turned off, it is warm-up. Although the air temperature is lower with important to leave it off for two to three minutes before the louvers fully opened, the heating capacity is still restarting.

  • Page 7: Wall Thermostat Specifications And Heat Pump Operations With 7530-736 Or 8530-735 Ducted Plenums

    IV. WALL THERMOSTAT SPECIFICATIONS AND HEAT PUMP OPERATIONS WITH 7530-736 or 8530-735 DUCTED PLENUMS WALL THERMOSTAT SPECIFICATIONS 55° TO 90°F. SET TEMP. RANGE: ± 2% OF SET TEMPERATURE ACCURACY: CONTINUOUS SAMPLING RATE: 9 TO 15 VDC UNREGULATED, UNFILTERED POWER SOURCE: OPERATING TEMPERATURE: -10°...
  • Page 8 OPERATION The charts below show the system functions. After the entire air conditioning system (and furnace system) is installed, check each position function. All cooling functions controlling to setpoint have a short cycle protection time delay of 3 minutes. There will be no delay if the cycle OFF time exceeds 3 minutes.

  • Page 9: Basic Components And Their Functions

    V. BASIC COMPONENTS AND THEIR FUNCTIONS HEAT PUMP REFRIGERATION SYSTEM DIAGRAM...
  • Page 10 Indoor Coil (Cooling Mode) condenser entering air. The purpose of the finned evaporator coil is to transfer the As the refrigerant passes through the first few tubes of the heat from the warm and moist indoor air to the cold low condenser, its temperature will be lowered or it will be de- pressure refrigerant.

  • Page 11: The Heat Pump Refrigeration Cycle

    are different sizes to accommodate for the difference in the RAISED TO A HIGH TEMPERATURE IN THE PRESENCE OF condenser and evaporator sizes. WATER (WHICH ALWAYS EXISTS IN THE ATMOSPHERE), IT DEFINITELY DOES BECOME A TOXIC GAS by changing from virtually harmless R-22 to phosgene High and Low Sides and hydrofluoric acids.

  • Page 12: General Electrical Operational Information

    VII. GENERAL ELECTRICAL OPERATIONAL INFORMATION HEAT PUMP ELECTRICAL OPERATION 7530-716 or 8530-715 STANDARD CEILING ASSEMBLIES All air conditioning functions operate the same as a standard This heating element will continue to run until the freeze air conditioner. While in the heating mode with the selector switch resets allowing the operation of the heat pump.

  • Page 13: Service Problems And Possible Solutions

    retail customer to choose between electric or gas heating to NOTE achieve his or her desired comfort level. The electric heat strip or heat pump will also continue to operate congruently The thermostat sub-base combination will operate normally in during this period. The gas heat default either the electric or gas heating positions and will cycle on will terminate at 60°...

  • Page 14: Individual Electrical Component Checkouts

    SERVICE PROBLEMS WITH THE HEAT PUMP AND THE 7530-716 OR 8530-715 STANDARD CEILING ASSEMBLIES The following list of service problems covers only some of the In many instances, it will be necessary to use the wiring more common problems which may occur and lists only the diagram in this guide to check out the electrical circuits step more probable causes.
  • Page 15 The wire with the white insulation is the If the resistance between any two terminals is 0 ohms, neutral. There should be 115 volts (domestic the motor windings are shorted. USA) between the neutral and the hot If the resistance between any terminal and the (black) wire, but there should be 0 volts between the neutral and the ground (the compressor housing is anything but infinity, the...
  • Page 16 Fan Motor Check Procedure heating position. The thermostat is actuated by sensing the temperature of the return air through the vent where the bulb If a fan motor refuses to perform properly, it can be checked in is located. Check continuity between terminals with an ohm the following manner: meter.
  • Page 17 Set and zero the ohm meter on the “highest” scale. Shorted Capacitor When testing for a good, open or shorted capacitor, If the capacitor is shorted, the indicator will move toward and perform the following checks: Place the ohm meter sometimes hit zero ohms, and will stay there.
  • Page 18 Start Capacitor speed of the motor. Therefore, since the relay is Most models use a start capacitor and a start relay to give the compressor high starting torque. The compressor will, designed to open the contacts at 75% of normal therefore, start against normal pressure difference (head running voltage (measured between terminals #5 and #2), the contacts will open (thus disconnect the start...
  • Page 19 7330-3351 Wall Thermostat Troubleshooting Tips To troubleshoot this printed circuit board, it will first The thermostat is a temperature control switch that maintains a temperature within an occupied space. When different be necessary to verify the presence of low voltage thermostat operations are chosen, the following internal (12 VDC) to the low voltage terminal board The thermostat is a temperature control switch that maintains a...

  • Page 20: Wiring Diagrams

    X. WIRING DIAGRAM 7535 AND 8535 SERIES HEAT PUMP...
  • Page 21 WIRING DIAGRAM 8534 SERIES HEAT PUMP WIRING DIAGRAM FOR THE 7530-716 AND 8530-715 HEAT PUMP FREE DELIVERY CEILING ASSEMBLIES...
  • Page 22 WIRING DIAGRAM FOR THE 7530-736 AND 8530-735 DUCTED CEILING ASSEMBLIES...
  • Page 23 WIRING DIAGRAM FOR THE 7330*3351 WALL THERMOSTAT * Brown and Purple Thermostat Wires May Have Been Eliminated On The Newer Model Wall Thermostats. WIRING DIAGRAM FOR THE 7330-3401 SUB-BASE...
  • Page 24 RV Products A Division of Airxcel, Inc. P.O. Box 4020 Wichita, KS 67204 1976C299 (3-06)

This manual is also suitable for:

8534 series7535 series

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