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2-2� Selection of copper and heat insulation materials
When using commercial copper pipes and fi ttings, observe the following:
• Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.024 to 0.030Btu/fth°F (0.035 to
0.045kcal/mh°C))
Be sure to use insulation that is designed for use with HVAC Systems.
• ACR Copper only.
• Be sure to insulate both the gas and liquid piping and observe the insulation
dimensions as below.
Gas side
Liquid side
• Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
Installation Tips
1�
Removing and installing the front panel
• Removal method
1) Place your fi ngers in the indentations on the main unit (one each on
the left and right sides), and open the front panel until it stops.
2) While pushing the left side front panel shaft outward, push up the
front panel and remove it. (Remove the right side front panel shaft in
the same manner.)
3) After removing both front panel shafts, pull the front panel toward
yourself and remove it.
• Installation method
Align the shaft of the front panel with the grooves of grill, and push
all the way in. Then close slowly. Push the center of the lower panel
surface fi rmly to engage the hooks.
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English
Piping size
Minimum bend radius
O.D. 3/8 inch
1-3/16 inch (30mm)
(9.5mm)
or more
O.D. 1/2 inch
1-9/16 inch (40mm)
(12.7mm)
or more
O.D. 5/8 inch
1-15/16 inch (50mm)
(15.9mm)
or more
O.D. 1/4 inch
1-3/16 inch (30mm)
(6.4mm)
or more
Piping thickness
Thermal insulation size
I.D. 15/32-19/32 inch
(12-15mm)
0.031 inch (0.8mm)
(C1220T-O)
I.D. 9/16-5/8 inch
(14-16mm)
0.039 inch (1.0mm)
I.D. 5/8-13/16 inch
(C1220T-O)
(16-20mm)
0.031 inch (0.8mm)
I.D. 5/16-13/32 inch
(C1220T-O)
(8-10mm)
Inter-unit wire
Gas pipe
Liquid pipe
Liquid pipe
Gas pipe
insulation
insulation
Finishing tape
Drain hose
Thermal insulation
thickness
13/32 inch
(10mm) Min.
Indentations on
the main unit
Front panel shaft
10
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