Install The Outdoor Unit; Connect The Piping - Panasonic CU-2S18NBU-1 Service Manual

10.2 INSTALL THE OUTDOOR UNIT

•
After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame firmly and horizontally with bolt nut (ø13/32").
2. When installing on a roof, please consider strong winds and earthquakes.
Please fasten the installation stand firmly with bolt or nails.

10.3 CONNECT THE PIPING

•
Remove the control board cover (resin) from the outdoor unit by loosening three screws.
10.3.1 Connecting the Piping to Outdoor Unit
Decide piping length and then cut by using pipe cutter.
Remove burrs from cut edge. Make flare after
inserting the flare nut (locate at valve) onto the copper
pipe.
Align center of piping to valves and then tighten with
torque wrench to the specified torque as stated in the
table.
10.3.2 Gas Leak Checking
Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system.
If the pressure holds, release the nitrogen and proceed to section 10.4.
Model
CU-2S18*** 24-1/8"
Do not overtighten, over tightening may cause gas leakage.
Piping size
1/4" (0.02 ft)
3/8" (0.03 ft)
1/2" (0.04 ft)
5/8" (0.05 ft)
3/4" (0.06 ft)
17
A B C
5-5/32" 5/8"
Torque
[18 N•m (13.3 Ibf. ft)]
[42 N•m (31.0 Ibf. ft)]
[55 N•m (40.6 Ibf. ft)]
[65 N•m (47.9 Ibf. ft)]
[100 N•m (73.8 Ibf. ft)]
D
14-3/16"