Daikin VRV IV+ Service Manual page 305

To remove the oil return valve body
To install the oil return valve body
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Prerequisite: Recuperate the refrigerant from the refrigerant circuit, see
"4.2.2 Repair procedures" [
1 Remove the oil return valve coil from the oil return valve body, see
"3.13.2 Repair procedures" [
2 Cut the oil return valve pipes using a pipe cutter.
b
a Oil return valve pipe
b Oil return valve body
3 Remove the oil return valve.
4 Keep the insulation for re-use.
5 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
6 Heat the end of the oil return valve pipes using an oxygen acetylene torch and
remove the oil return valve pipe ends.
7 Stop the nitrogen supply when the piping has cooled down.
8 To install the oil return valve body, see
1 Install the oil return valve in the correct location.
2 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
3 Wrap a wet rag around the oil return valve and solder the oil return valve
pipes to the oil return 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.
4
368].
4
304].
"3.13.2 Repair
3 Components
|
a
a
4
procedures" [ 304].
Service manual
305