Daikin Sensira Series, Service Manual

Page: 42 / 172

2 | Components
Service manual
42
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
c d a b a
a 4‑way valve pipe
b 4‑way valve
c Putty
d Insulation
3 Remove the 4‑way valve.
4 Keep the putty (if installed) and the insulation (if installed) for re-use.
5 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
6 Heat the ends of the 4‑way valve pipes using an oxygen acetylene torch and
remove the 4‑way valve pipe ends.
7 Stop the nitrogen supply when the piping has cooled down.
8 To install the 4‑way valve body, see "2.1.2 Repair procedures" [
4
41].
To install the 4-way valve body
1 Remove the coil from the valve body.
2 Install the 4‑way valve in the correct location.
INFORMATION
If any refrigerant pipes were cut during removal of the 4‑way valve body, ALWAYS
install new pipes.
3 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
4 Wrap a wet rag around the 4‑way valve and solder the 4‑way valve pipes to
the refrigerant pipes.
CAUTION
Overheating the valve will damage or destroy it.
5 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.