Daikin Altherma 3 H HT ECH2O Service Manual page 312

4 | Components
To install the solenoid valve body
Service manual
312
3 Using a valve magnet, open the solenoid valve.
4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
5 Wrap a wet rag around the components near the solenoid valve body pipes.
Heat the brazing points of the solenoid valve body pipes using an oxygen
acetylene torch and remove the solenoid valve body pipes from the
refrigerant pipes using pliers.
a Solenoid valve body
b Pipe
6 Stop the nitrogen supply when the piping has cooled down.
7 Remove the solenoid valve body.
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.
8 Install plugs or caps on the open pipe ends of the refrigerant piping to avoid
dirt or impurities from entering the piping.
9 To install the solenoid valve body, see
1 Remove the plugs or caps from the refrigerant piping and make sure they are
clean.
2 Remove the solenoid valve coil from the spare part solenoid valve body.
3 Install the solenoid valve body in the correct location and correctly oriented.
Insert the pipe ends in the pipe expansions.
4 Open the solenoid valve using a valve magnet.
5 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
6 Wrap a wet rag around the solenoid valve body and any other components
near the solenoid valve and solder the solenoid valve body pipes to the
refrigerant pipes.
b a
b
"4.22.2 Repair
4
procedures" [ 310].
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
ESIE22-11A – 2023.06