ESIE16-03B
|
Part 3. Repair
3.3. Unit specific repair procedures
22/08/16
|
Version 1.1
Page 81
SA R32 Sky-Air RZAG-L
3.3.2.9. Replacing expansion valve body
Removal
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to
"Basic removal" on page 67
).
4. Recover the refrigerant (refer to
"Refrigerant repair procedures" on page 61
).
5. Remove the expansion valve motor (refer to
"Replacing expansion valve motor" on page 82
).
6. Connect a nitrogen hose to the outdoor suction service port.
7. Attach a hose with core-depressor to allow the release of the nitrogen.
8. Cut the 2 expansion valve pipes (1).
9. Remove the expansion valve (2).
10. Supply nitrogen to the piping circuit.
11. Using an oxygen acetylene torch, heat the 2 expansion valve pipes (1).
12. When the solder material is liquid, pull the 2 expansion valve pipes (1).
13. Cut the nitrogen supply when the piping has cooled down.
Figure 3-17: Removing expansion valve
Installation
1. Wrap a wet rag around the expansion valve Y1E (3).
2. Proceed in reverse order.
C
AUTION
The maximum applied Nitrogen pressure must not exceed 0.02 MPa.
1. Expansion valve pipe
2. Expansion valve
W
ARNING
Overheating the expansion valve Y1E will damage or destroy it.
2
1
