Daikin VRV IV+ Service Manual page 249

To install the expansion valve body
To install the expansion valve motor
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
4 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
5 Heat the ends of the expansion valve pipes using an oxygen acetylene torch
and remove the expansion valve pipe ends.
6 Stop the nitrogen supply when the piping has cooled down.
7 To install the expansion valve body, see
1 Install the expansion valve body in the correct location and correctly oriented.
2 Supply nitrogen to the refrigerant circuit. The nitrogen pressure MUST NOT
exceed 0.02 MPa.
3 Wrap a wet rag around the expansion valve body and solder the refrigerant
pipes to the expansion valve body.
CAUTION
Overheating the valve will damage or destroy it.
4 After soldering is done, stop the nitrogen supply after the component has
cooled‑down.
a
b
a Expansion valve body
b Expansion valve pipe
5 To install the expansion valve motor, see
6 Add refrigerant
4
procedures" [ 368].
1 Install the expansion valve motor on the expansion valve body.
INFORMATION
Turn the expansion valve motor 1/8 turn clockwise to lock it on the expansion valve
body.
INFORMATION
The correct alignment of the expansion valve motor is ensured by dimples.
a
b
"Repair
"Repair
to the refrigerant
3 Components
|
4
procedures" [ 247].
4
procedures" [ 247].
circuit, see "4.2.2 Repair
Service manual
249