Rheem 871018 Service Instructions Manual page 54

Proportional Gas Flow Regulating Valve: (Procedure 7)
1. Remove the front panel and Burner Change Over Assembly. Refer to Procedures 1
and 2.
2. Disconnect the gas supply pipe from the gas inlet connection.
3. Remove the three screws from the gas inlet connector and withdraw the connector and
o-ring from the base of the water heater.
4. Carefully remove the Proportional Gas Flow Regulating Valve from the water heater.
5. Disconnect the multi-pin wiring plug from the Gas Inlet Solenoid Valve and the red and
black wires from the proportioning valve. Note: The proportional valve terminals are
marked + for red and – for black.
6. Reassemble in reverse order of above. Replace gaskets (item numbers 105 and 108) if
required.
7. Test for gas leaks with soapy water solution.
Water Body Assembly: (Procedure 8)
Do not attempt to dismantle the servomotor, this is factory calibrated.
Adjustments will render the water heater either inoperable or cause incorrect
water temperature delivery.
1. Remove the front panel, Burner Change Over Assembly and Proportional Gas Flow
Regulating Valve. Refer to Procedures 1, 2 and 6.
2. Disconnect the cold water supply pipe from the cold-water inlet connection.
3. Unscrew the water drain plug (item 405) and relief valve (item 431) and drain the water
heater.
4. Remove the screw/s from the flange (item 419) and remove.
5. Carefully disengage the two pipes from the Water Body Assembly.
6. Disconnect the wiring to the bypass solenoid.
7. Remove the four screws from the cold water inlet connector and withdraw the
connector and o-ring from the base of the water heater.
8. Carefully remove the Water Body Assembly from the water heater.
9. Disconnect the multi-pin connectors from the motor, flow sensor and cold water
thermistor.
10. Remove the retaining screw from the anti-frost heater and remove. (If fitted)
11. Reassemble in reverse order of above, replacing pipe o‟rings (item 427) if required.
12. Test for gas and water leaks.
Combustion Fan Motor: (Procedure 9)
1. Remove the front panel. Refer to Procedure 1.
2. Remove the screw retaining the Cord Connector, item 008.
3. Remove the screw retaining the Terminal Block Assembly, item 768.
4. Remove the screws retaining the mounting bracket for the transformer and the power
filter to the Fan Motor Assembly and reposition the transformer and power filter
temporarily.
5. Remove the remaining screw retaining the Fan Motor Assembly and lift the Fan Motor
clear.
6. Disconnect the multi-pin wiring plug from the Fan Motor.
7. Reassemble in reverse order of above.
TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B
D.O.I: February 2008
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54
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