Piping and Wiring for Outdoor Unit
40
Air-to-Water Heat Pump
Step 2. Tightening
• Align the center of the pipes and sufficiently
tighten the flare nut by hand.
• Tighten the flare nut with a wrench until the
wrench clicks
• Tightening torque is as following.
Step 3. Preventing entering of foreign
objects
• Plug the pipe through-holes with putty or
insulation material (procured locally) to fill up
all gaps as shown in right figure.
• If insects or small animals enter the outdoor
unit, it may cause a short circuit in the electrical
box.
• Finally, form the pipes by wrapping the
connecting portion of the indoor unit with
insulation material and secure it with two kinds
of vinyl tape. Ensuring thermal insulation is
very important.
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
Outdoor unit
Continuous
Torque wrench
Gas side piping
Liquid side piping
Putty or insulating material
(produced locally)
Drain hose
(if necessary)
Connecting wire
Connection pipe
1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 40
