Rheem II Series Service Instructions Manual page 55

Water Inlet Body, Valve and Sensor Assembly: (Procedure 9)
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, PCB Assy and Proportional Gas
Flow Regulating Valve. Refer to Procedures 2, 5 and 8.
2. Disconnect the cold water supply pipe from the cold-water
inlet connection.
3. Unscrew the water drain plug (item 402) and drain the water
heater.
4. From inside the cabinet, carefully remove the anti-frost heater and the large S/S clip
(item 421).
5. Carefully remove the small S/S flange (item 446) securing the copper pipe and allow the
pipe to disengage from the body.
6. Disconnect the Red/ Black / Brown wire connector from the
wiring loom.
7. Remove 3 x (external) screws from the flange (item 401) and
carefully pull down to extract the brass housing.
8. Remove the thermistor from the side of the Inlet valve (secured
with 2 x screws) before extracting the valve from the heater.
9. Reassemble in reverse order of above, replacing pipe O-rings
(item 428) and thermistor O-ring (item 412) if required.
10. Test for water leaks.
Water outlet Body, Safety Valve and Sensor Assembly: (Procedure 10)
1. Remove the front panel, PCB Assy, Proportional Gas Flow
Regulating Valve and Water Inlet Assembly. Refer to Procedures
2, 5, 8 and 9.
2. Disconnect the hot water supply pipe from the hot-water outlet
connection.
3. Remove the safety valve (item 431) from the side of the housing.
4. From inside the cabinet, carefully remove the anti-frost heater
and temperature thermistor (item 713).
5. Carefully remove the small S/S flange (item 445) securing the
copper pipe and allow the pipe to disengage from the body.
6. Remove 3 x (external) screws from the flange (item 430) and carefully pull down to
extract the brass housing.
7. Reassemble in reverse order of above, replacing pipe O-rings and thermistor O-ring
(item 432) if required.
8. Test for water leaks.
TM090 12-26 Series II CFGWH Service Instructions
REV AB – Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled"
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