Daikin FTXA20A Service Manual page 45

To install the 4-way valve body
To install the 4-way valve coil
FTXA20~50A(W)(S)(T) + FTXA20~50B(B)(S)(T) + RXA42+50A +
RXA20~35A(9) + RXA42+50B
Split Stylish R32
ESIE18-03D – 2021.05
INFORMATION
It is ALSO possible to cut the component pipe(s) using a pipe cutter. Make sure to
remove the remaining component pipe end(s) from the refrigerant pipes by heating
the brazing point(s) of the component pipe(s) using an oxygen acetylene torch.
7 Install plugs or caps on the open pipe ends of the refrigerant piping to avoid
dirt or impurities from entering the piping.
8 To install the 4‑way valve body, see
1 Remove the plugs or caps from the refrigerant piping and make sure they are
clean.
2 Remove the 4‑way valve coil from the spare part 4‑way valve body.
3 Install the 4‑way valve body in the correct location and correctly oriented.
Insert the pipe ends in the pipe expansions.
4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
5 Wrap a wet rag around the 4‑way valve body and any other components near
the 4‑way valve and solder the 4‑way valve pipes to the refrigerant pipes.
d
a 4‑way valve pipe
b 4‑way valve
c Putty
d Insulation
CAUTION
Overheating the valve will damage or destroy it.
6 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.
7 Install the putty (if available) and the insulation (if available) in their original
location.
8 Install the 4‑way valve coil on the 4‑way valve body, see
4
procedures" [ 43].
9 Perform a pressure test, see
10 Add refrigerant
4
procedures" [ 162].
1 Install the 4‑way valve coil on the 4‑way valve body.
"2.1.2 Repair
c a b a
"3.2.1 Checking
to the refrigerant
2 Components
|
4
procedures" [ 43].
"2.1.2 Repair
4
procedures" [ 158].
circuit, see "3.2.2 Repair
Service manual
45