Specifications

TM022 Raypak RHP 33 Pool and Spa Heat Pump Service Instructions REV C
D.O.I: 14/03/2006
41
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8. Evacuate system to 300 microns for a period of at least 40 minutes.
9. Recharge system with R22. Refer to “refrigerant charge” on page 11.
10. If installing a new TX valve it will need to be adjusted. See the procedure on page 41.
Receiver Filter Drier: (Procedure 24)
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.
The fan motor may commence operation without warning. Failure to isolate
the power may result in serious injury if the fan commences operation.
Personnel qualified and licensed to work with refrigerants may only carry
out the following repair procedures to the sealed refrigeration system.
The following procedures assume that all work conducted conforms to the
refrigeration code of good practice. During repair the R22 refrigerant must
be recovered, not vented to atmosphere.
1. Remove control panel cover and access panel (see procedures 1 & 2).
2. Confirm with a multi-meter between Active and Neutral at the Compressor
contactor Line terminals that voltage is not present.
3. Recover R22 refrigerant.
4. Un-braze and remove receiver filter drier.
5. Reassemble in reverse order of above. Cut pipe work will need to be joined and re-
brazed.
6. Pressurise system to 3000kPa and conduct a leak test.
7. Evacuate system to 300 microns for a period of at least 40 minutes.
8. Recharge system with R22. Refer to “refrigerant charge” on page 11.
Adjusting the TX Valve
The fan motor may commence operation without warning.
Personnel qualified and licensed to work with refrigerants may only carry
out the following repair procedures to the sealed refrigeration system.
The following procedures assume that all work conducted conforms to the
refrigeration code of good practice. During repair the R22 refrigerant must
be recovered, not vented to atmosphere.
Measure the suction line temperature at the bulb of the expansion valve. Measure the
suction pressure at the same time. Refer to the saturated temperature chart for R-22
shown on page 42 and compare the saturated temperature to the readings taken. Turn the
stem of the TX valve clockwise to raise the suction temperature and counter clockwise to
lower the temperature. The target Superheat is 8 degrees Celsius at 27 degrees Celsius
wet bulb at 80% relative humidity.