12
Step 4: Connect indoor and outdoor pipes
• Remove the screw on the right handle of outdoor
unit and then remove the handle.
• Remove the valve cap and align the pipe joint on the flared
orifice of the pipe.
• Pre-tighten the union nut by hand.
• Tighten the union nut with torque wrench by referring
to the sheet below.
NOTES:
• If the pipe diameter of the outdoor unit doesn’t match the piping connection size of the indoor unit,
use the piping connection size of the indoor unit and add the adaptor supplied with the indoor unit.
• Make sure to label each pipe so you know which system it belongs to, in order to avoid inaccurate
piping.
screw
handle
liquid pipe
gas pipe
liquid
valve
gas valve
pipe joint
union nut
Hex nut diameter
Tightening torque
(N-m)
Φ 6
15~20
Φ 9.52
30~40
Φ 12
45~55
Φ 16
60~65
Φ 19
70~75
Adaptor
