Piping and Wiring for Outdoor Unit
Step 3. 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 4. 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.
Step 5. PCB Setting when pipe is longer
than 15m (if necessary)
• If pipe length is longer than 15m, the PCB
setting should be performed according to
following procedures.
1. Open the control cover of outdoor unit
2. Set to ʻONʼ for 4th switch of 5 pin DIP switch
3. Close the cover and check the product
operation
Do not open the side panel and not set
the DIP switch while product
operation.
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
ON
12
3
45
DIP SW2
44
Air-to-Water Heat Pump
Summary of Contents for AHNW096A0
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