Rheem 55027500 Service Instructions Manual page 43

Bypass Valve – 550 Series Only (Procedure 17)
Personal Protective Equipment should be worn when conducting step 2 of
this procedure to reduce the risk of electric shock. Refer to Rheem Safety
Procedure on electrical testing.
1. Isolate the power to the water heater.
2. Remove the access cover and confirm with a multi-meter between Active and
Neutral at the terminal block that voltage is not present.
3. Remove the air inlet louver. (Refer to Procedure 8)
4. Undo the screw retaining the solenoid to the bypass valve and remove the solenoid.
5. Remove the pipe insulation to expose pipe work at the bypass valve assembly. Un-
braze the pipe-work to the bypass valve and remove.
6. Braze the replacement bypass valve into place.
7. Replace the receiver/filter drier. (Refer to Procedure 16 – steps 4 to 6)
8. Refit the solenoid valve.
9. Pressurise system to 3000kPa and conduct a leak test. Refit and secure the pipe-work
insulation.
10. Evacuate system to 100 microbar (30") for a period of at least 30 minutes.
11. Recharge system with the correct refrigerant. Refer to "Specifications – Refrigeration
System" table on page 3.
12. Restore power. The refrigeration plant should commence operation.
13. Refit air inlet louver and jacket top.
TX Valve Replacement (Procedure 18)
Personal Protective Equipment should be worn when conducting step 2 of
this procedure to reduce the risk of electric shock. Refer to Rheem Safety
Procedure on electrical testing.
1. Isolate the power to the water heater.
2. Remove the access cover and confirm with a multi-meter between Active and
Neutral at the terminal block that voltage is not present.
3. Remove the air inlet louver. (Refer to Procedure 8)
4. Remove the pipe insulation to expose pipe-work at the TX valve assembly and the TX
valve sensor.
5. Separate the TX valve sensor and capillary from the suction line.
6. Un-braze the pipe-work to the bypass valve and remove the TX valve.
7. Braze the replacement TX valve into place and attach the sensor to the suction line.
Note: Ensure the sensor bulb is in good contact with the suction line.
8. Replace the receiver/filter drier. (Refer to Procedure 16 – steps 4 to 6)
9. Pressurise system to 3000kPa and conduct a leak test. Refit and secure the pipe work
insulation.
10. Evacuate system to 100 microbar (30") for a period of at least 30 minutes.
11. Recharge system with the correct refrigerant. Refer to "Specifications – Refrigeration
System" table on page 3.
12. Restore power. The refrigeration plant should commence operation.
13. Adjust TX valve (Refer to Procedure 19).
14. Refit air inlet louver and jacket top.
TM017 Rheem Air Sourced Heat Pump Service Instructions REV: C
Date of Issue: 5/11/05
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