Rheem 871018 Service Instructions Manual page 57

Over Heat Limiter Assembly: (Procedure 15)
Note: When an over heat limiter is installed as a spare part in any model heater other
interconnecting components may also require replacing. Refer to „Product Changes‟ on
page 10 and „Parts Replacement Scenarios‟ on page 11 for more information.
Replacement of the Over Heat Limiter requires removal and possible replacement of the
Heat Exchanger.
1. Follow Procedure 11 to step 10.
2. Disconnect the multi-pin plug to the Over Heat Limiter Assembly.
3. Remove the screws retaining the Over Heat Limiter Assembly to the Jacket back and
remove the Over Heat Limiter Assembly.
4. Inspect the heat exchanger for holes or combustion damage.
5. Reassemble in reverse order of above (Note: Ensure all multi-pin plugs are
reconnected and all wiring is neatly repositioned and retained to prevent damage
during operation).
6. Test operation of water heater and ensure the MIN and MAX burner gas pressures are
correct. Refer to Procedure on page 52.
Remote Controller: (Procedure 16)
1. Isolate power at the water heater.
2. Remove the small Philips head screw from the bottom of the Remote Controller.
3. Gently pivot the Remote Controller up from the bottom and then lift up and off upper
retaining lugs.
4. Kitchen Controller: Disconnect the wiring from the terminals on the back of the
Controller (Note: The wiring is not polarity sensitive).
Bathroom Controllers: Disconnect the multi-pin plug.
5. Reassemble in reverse order of above.
Gas Type Circuit Board: (Procedure 17)
1. Remove the front panel. Refer to Procedure 1.
2. Gently unplug the Gas Type Circuit Board from the PCB.
3. Reassemble in reverse order of above.
4. Restore power.
5. Press the MAX button. On all 871024 & 871026 models 4H should be displayed. On all
871018 & 871020 models 3H should be displayed
6. Test operation of water heater and ensure the MIN and MAX burner gas pressures are
correct. Refer to Procedure on page 52.
Transformer: (Procedure 18)
Note: When a transformer is installed as a spare part in an 871024, 871024-B or 871026
model heater other interconnecting components will also require replacing. Refer to
„Product Changes‟ on page 10 and „Parts Replacement Scenarios‟ on page 11 for more
information.
1. Remove the front panel. Refer to Procedure 1.
2. Disconnect the primary and secondary winding multi-pin plugs to the Transformer.
3. Remove the 2 Philips head screws retaining the Transformer.
4. 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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