Rheem 55027500 Service Instructions Manual page 46

The following part of the procedure assumes that all work conducted
conforms to the refrigeration code of good practice. During replacement the
refrigerant must be recovered, not vented to atmosphere.
7. Fit gauges and refrigerant recovery equipment and remove R22 refrigerant
8. Replace TX Valve (Refer to Procedure 19)
Note: The replacement TX valve has different diameter connections to the original;
some alteration of the pipe work will be required.
9. Adjust TX Valve
a. From the supplied (factory) position turn the adjuster screw OUT 3 turns.
10. Replace Filter Drier (Refer to Procedure 15)
Note: The replacement filter drier is a soldered type; some models have flared
connections, when fitting the replacement filter drier it will be necessary to cut the
flares from the pipe work.
11. Recharge system with 1250 grams of R409A.
Note: R409A is a blended refrigerant charging must be carried out with the refrigerant
in the liquid phase do NOT vapour charge.
12. Attach the compressor label (pt no 121027) to the
compressor
13. Refit the Refrigeration Section Jacket and Air Outlet Cover.
14. Restore power and allow heat pump to run for at least 15 minutes to stabilise. The
operating head pressure should be approx. 800kPa lower than when operating with
R22.
15. Remove gauges and refit the Air Inlet Louvre.
16. Fit refrigerant change label (blue label) below rating
plate on heater jacket and fill in the details.
17. Fit new model identification label (silver label) below
refrigerant change label as per the table below.
Original Model Number
55027500
55127505
55127507
TM017 Rheem Air Sourced Heat Pump Service Instructions REV: C
Date of Issue: 5/11/05
This document is stored and maintained electronically by
Model identification label
126528
126526
126527
45
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".