Daikin VRV IV+, Руководство по обслуживанию

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3 | Components
Service manual
212
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
INFORMATION
The cutting locations of the 4‑way valve pipes can differ due to the pipe cutter
needing sufficient space to go around the pipes. It is up to the technician to define
the best cutting locations. If any refrigerant pipes are cut, these need to be replaced
during installation of the 4‑way valve body.
a
a
c
a
b
a
d
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 expansion valve pipe ends.
7 Stop the nitrogen supply when the piping has cooled down.
8 To install the 4‑way valve body, see "3.1.2 Repair procedures" [
4
211].
To install the 4-way valve body
1 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.
2 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
3 Wrap a wet rag around the 4‑way valve and solder the 4‑way valve pipes to
the 4‑way valve.
CAUTION
Overheating the valve will damage or destroy it.
4 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.