Installation guide

42
PIPING AND WIRING FOR OUTDOOR UNIT
ENGLISH
Connecting Pipe to Outdoor Unit
Connecting pipe to the outdoor unit is five steps including PCB setting.
Step 1. Determine direction of pipes.
- The pipes can be connetable in three directions.
- The directions are expressed in below figure.
- When connecting in a downward direction, knock out the knock-out hole of the base pan.
Step 1. Pre-tightening.
- Align the center of the pipes and sufficiently
tighten the flare nut by hand.
Step 2. Tightening.
- Tighten the flare nut with a wrench.
- Tightening torque is as following.
Indoor unit tubing Flare nut Pipings
Torque wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
Outside diameter Torque
mm inch kgf·m
6.35 1/4 1.8 ~ 2.5
9.52 3/8 3.4 ~ 4.2
12.7 1/2 5.5 ~ 6.6
15.88 5/8 6.6 ~ 8.2
19.05 3/4 9.9 ~ 12.1
Forward
Sideways
Backward
Forward
Sideways
Backward
Knock-out Base pan
Connecting Pipe to Indoor Unit
Connecting pipe to the indoor unit is two steps. Read following directions carefully.