Panasonic CS/CU-XU12AKY Series

Installation instruction
23
English Installation instruction
• 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 by bolt nut (ø10 mm).
2. When installing at roof, please consider strong wind and earthquake.
Please fasten the installation stand firmly with bolt, screws or nails.
AB
C
D
Model A B C D
540 mm 160 mm 18.5 mm 330 mm
570 mm 105 mm 18.5 mm 320 mm
AU12 Series,XU12 Series,
AU18 Series, XU18 Series,
HU12 Series, HU18 Series
AU24 Series
Install the Outdoor Unit
Connecting the Piping to Indoor
Connecting the Piping to Outdoor
Evacuation of the Equipment
Outdoor Unit
For connection joint location at outside building
Please make flare after inserting flare nut (locate at joint portion of tube assembly)
onto the copper pipe. (In case of using long piping)
Connect the piping
• Align the center of piping and sufficiently tighten the flare nut with fingers.
• Further tighten the flare nut with torque wrench in specified torque as
stated in the table.
Torque
wrench
Spanner or
Wrench
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 valve and then tighten with
torque wrench to the specified torque as stated in the
table.
Do not overtighten, overtightening may cause gas leakage.
Piping size Torque
6.35 mm (1/4") [18 N•m (1.8 kgf•m)]
9.52 mm (3/8") [42 N•m (4.3 kgf•m)]
12.7 mm (1/2") [55 N•m (5.6 kgf•m)]
15.88 mm (5/8") [65 N•m (6.6 kgf•m)]
19.05 mm (3/4") [100 N•m (10.2 kgf•m)]
When installing an Air Conditioner, Be sure to evacuate the Air inside the INDOOR UNIT and Pipes in the following
procedure.
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
There is no extra refrigerant in the outdoor unit for air purging.
1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.
• Be sure to connect the end of the charging hose with the push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from
0 cmHg (0 MPa) to –76 cmHg (–0.1 MPa). Then evacuate the air approximately ten minutes.