Rheem 325 II Series Service Instructions Manual page 67

Filter Drier (30 minutes*)
WARNING: The filter drier is capable of discharging trapped refrigeration
oil under pressure, even after it has been removed from the system and is
open to atmosphere.
Personal Protective Equipment including a face shield and long sleeves
must be worn, to prevent eye injury or skin irritation. The removed filter
drier must always be held at a safe distance, drained of retained oil,
securely capped and care taken to ensure the pipes are never pointed
towards the face.
1. Remove the heat pump module. Refer to the „Heat Pump Module Removal‟ procedure
on page 62.
2. Remove the heat pump module outer jacket. Follow steps 6 – 14 of the „Outer Jacket‟
procedure on page 62.
3. Recover the refrigerant from the sealed refrigeration system.
4. Disconnect the pipework from the filter drier.
The following steps MUST be carried out on the removed filter drier:
Empty any retained oil out of the filter drier into a safe oil collection container,
whilst holding the filter drier at a safe distance and taking care to ensure the
pipes are never pointed towards the face.
Remove the pipe caps from the new filter drier and install the caps onto the
removed filter drier. The caps may be split so be sure to securely tape the caps
in place on the removed filter drier.
5. Braze the replacement filter drier into place, being sure to nitrogen purge.
6. Pressurise the refrigeration system with nitrogen to 2500kPa and conduct a leak test.
7. Evacuate system to 500 microns of mercury (65Pa absolute) for at least 30 minutes.
8. Recharge the system with the correct refrigerant. Refer to the Specifications – Heat
Pump Module table on page 7.
9. Refit the heat pump outer jacket and refit/re-install the heat pump module, restore
power and allow the heat pump to run for at least 10 minutes – confirm operating
pressures are acceptable (refer to page 54).
10. Isolate power and remove gauges.
11. Check the flexible hose connections for water leaks.
12. Refit the heat pump module access cover and restore power supply to the water
heater.
Compressor
WARNING: Heat must NOT be applied to plastic components. When brazing
pipework as indicated in this procedure, a heat shield must be used to
prevent the possibility of damage.
1. Remove the heat pump module. Refer to the „Heat Pump Module Removal‟ procedure
on page 62.
2. Remove the heat pump module outer jacket. Follow steps 6 – 14 of the „Outer Jacket‟
procedure on page 62.
3. Remove the insulation from on top of and around the compressor.
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
(1 hour*)
Service. All printed copies are deemed uncontrolled.
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