HTW PREMIUM R32 Manuel De L'utilisateur Et D'installation page 53

Oil applied (to reduce friction with the fiare nut)
Oil applied (improves seal air-tightness)
Table 4 Fiare nut tightening torque
Pipe Diameter (lnch)
Tightening Torque (N·m)
� CAUTION!
Be sure to connect the gas pipe after connecting the liquid pipe completely.
d. Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas
leakage detector without fail when the pipes are connected.
e. Heat lnsulation on the Pipe Joints
Stick coupler heat insulation (large and small) to the place where connecting pipes.
Reference A
Coupler heat
insulation (small) F'===��
on the pipe
Fig.14
Fiare nut
1/4" 3/8"
15-30 35-40
1
Fig.13
Piping union
1/2" 5/8"
45-50 60-65
Reference A:
Cover this portian with heat
insulating material also without fail
Fiare nut
3/4" 7/8"
70-75
80-85