TM049 27L Continuous Flow Service Instructions
REV AL
– Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support.
All printed copies are deemed “uncontrolled”.
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COMPONENT REPLACEMENT PROCEDURES
Front Cover: (Procedure 1)
1.
Isolate power, gas and water supplies.
2. Remove four screws, two from the top and two from the bottom of the front panel.
3. Remove the front panel.
Control PCB: (Procedure 2)
1.
Isolate power supply.
2. Remove the front cover. Refer to procedure 1.
3. Remove the screw retaining the power cord to the bottom left hand side of heater cabinet.
4. Remove the two retaining screws at top right and bottom left hand side of the PCB.
5. Disconnect the multi-pin connectors from the PCB Assembly.
6. Carefully lift the right hand side of the PCB and remove PCB assembly.
7. Reassembly in reverse order of above.
Note:
When replacing a PCB it is important to ensure that the correct PCB is installed
as fitment of an incorrect PCB will result in unit malfunction. There are two PCB options
available and the correct type to use is dependent on the type of water body assembly
that is installed i.e. if the water body has a black plug on the flow sensor wiring loom, the
PCB must have a matching black socket, refer TB18-001 for further details.
Power Supply PCB: (Procedure 3)
1.
Isolate power supply.
2. Remove the front cover and control PCB. Refer to procedures 1 and 2.
3. Remove the four screws that are retaining the PCB housing. Two from the top of the
PCB housing and two from the underside of the heater cabinet.
4. Remove the screw retaining the earth lead to the bottom left hand side of heater cabinet.
5. Disconnect the wiring harness mounted on the right hand side of PCB housing.
6. Carefully lift the top of the PCB housing to expose the power supply PCB.
7. Disconnect the multi-pin connectors from the power supply PCB Assembly and remove
power supply PCB from heater cabinet.
8. Reassembly in reverse order of above.
OK Monitor & Plate: (Procedure 4)
1.
Isolate power supply.
2. Remove the front cover. Refer to procedure 1.
3. Remove the two multi-pin connectors from LED display.
4. Remove three retaining screws (one from top at Gas valve and two from underside of
heater cabinet).
5. Undo the two wiring harnesses to free wires and remove LED display.
6. Reassembly in reverse order of above.
