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Specifications

ManualsBrandsRheem ManualsFurnaceGTC Series
41424344454647484950
TM040 16, 18 & 20L Continuous Flow Gas Water Heater Service Instructions
D.O.I: 2/06/2009
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
50
Power cord
1. Switch off power at power point and unplug power cord from power point.
2. Remove the Front Panel. Refer to „Front Panel‟ procedure on page 48.
3. Undo cord clamp screw located on bottom right hand side of PCB and remove clamp.
4. Disconnect Earth connection at PCB holder.
5. Disconnect the power cable wiring loom plug and withdraw power cable through slot in
the water heater jacket.
6. Reassemble in reverse order of above.
Water Body Assembly
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 Proportional Gas Flow Regulating Valve. Refer to „Proportional Gas Flow
Regulating Valve‟ procedure on page 49.
2. Disconnect the cold water supply pipe from the cold water Inlet Connection.
3. Unscrew the Water Drain Valve assembly (item 32) and Pressure Relief Valve (item
30) and drain the water heater.
4. Remove the screw from the Retaining Flange (item 26) and remove Flange.
5. Carefully disengage the two copper 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 on the underside of the
water heater cabinet and withdraw the Inlet 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 servomotor, Water Flow Sensor and Cold
Water Thermistor at the PCB. Note: Some wiring retainers will need to be released to
allow wiring to be removed.
10. Remove the retaining screw from the Anti-Frost Heater and remove.
11. Reassemble in reverse order of above, replacing pipe o-rings (item 6) if required.
12. Test for gas and water leaks.