INS-97
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
4.7.20 Opening/closing of service valves on Outdoor Unit
Recommended tightening torque (N•m)
5.4
ᨺ
5
.
3
1
6
.
6
ᨺ
16.5
8.1
ᨺ
9.9
18
ᨺ
22
13.5
ᨺ
16.5
23
ᨺ
27
27
ᨺ
33
36
ᨺ
44
11.5
ᨺ
13.9
Caution:
For connection of check joint, always use special charge hose.
After tightening protective nut of check joint, please check there are no refrigerant leakages.
How to operate on service valves of Outdoor Unit
a. Opening of service valve
1) Remove the service valve’s protective nut and use an Allen key having the dimensions indicated in the Table
below for rotating the service valve anticlockwise.
2) Rotate the valve till opening it completely. Do not force valve beyond opening max. limit, as the valve’s body
may be broken. Do not use tools other than Allen key for opening service valves.
3) After opening the valve, tighten the protective nut according to the recommended tightening torque (see the
Table below).
b. Closing of service valves
1) Remove protective nut and use an Allen key having the dimensions indicated in the Table below for rotating
the valve clockwise.
2) Close the valve completely.
Screw again valve’s protective nut according to the recommended tightening torque (see the Table below).
Check joint
Protective cap nut
of check joint
Protective cap nut
of service valve
Slot for Allen key
Flare connection Valve stem
Valve’s dimension
Ø6.35(1/4”)
Ø9.52(3/8”)
Ø12.7(1/2”)
Ø15.88(5/8”)
Ø25.4(1”)
Ø22.22(7/8”)
Service valve
Valve’s nut
Check joint’s nut
Allen key
4mm
Allen key
6mm
Allen key
10mm