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Air-to-Water Heat Pump
Piping and Wiring for Outdoor Unit
Connecting Pipe to Indoor Unit
Connecting pipe to the indoor unit is two steps. Read following directions carefully.
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 connectable in four directions
• The directions are expressed in below figure.
• The pipes cannot be connected in downward
direction.
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.
Torque wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
Indoor unit tubing
Flare nut
Pipings
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
Outside diameter
Torque
Forward
Sideways
Backward
1,MFL69676201,영영 2017. 3. 8. 영영 3:07 Page 48