Installation Manual

ENGLISH
13
THE INDOOR UNIT INSTALLATION
Connection of piping
Align the center of the piping and sufficiently
tighten the flare nut by hand.
h Indoor Unit (18k) includes the sockets.
(Ø 6.35 → Ø 9.52 x 1EA, Ø 12.7 →
Ø 15.88 x 1EA, Ø 9.52 → Ø 12.7 x 1EA)
Finally, tighten the flare nut with torque
wrench until the wrench clicks.
- When tightening the flare nut with torque
wrench ensure the direction for tightening
follows the arrow on the wrench.
ODU
Capacity
(kBtu/h)
Refrigerant Connections
Pipe size
Liquid Gas
Single
Zone
18 3/8 (Ø9.52) 5/8 (Ø15.88)
Outside diameter Torque
mm inch
N·m kgf·m lbf·ft
Ø6.35 1/4 14~18 1.4~1.8 10~13
Ø9.52 3/8 34~42 3.5~4.3 25~31
Ø12.7 1/2 49~61 5.0~6.2 36~45
Ø15.88 5/8 69~82 7.0~8.4 51~60
Ø19.05 3/4 100~120 10.0~12.2 73~88
Indoor unit tubing Flare nut Pipes
Torque
Wrench
Indoor unit
tubing
Open-end wrench
(fixed)
Connection pipe
Flare nut
For Single zone
IDU
Liquid
Gas