English
11
Selection of copper and heat insulation materials
•
When using commercial copper pipes and fittings, observe the
following:
1. Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045kcal/mh°C)
Refrigerant gas pipe’s surface temperature reaches 110°C max.
Choose heat insulation materials that will withstand this temperature.
2. Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
3. Use separate thermal insulation for gas and liquid refrigerant pipes.
1. How to carry out refrigerant piping.
•
Detach the pipe retainer.
(Refer to Fig. 12)
‹In case of left or right piping›
1. Open the knock out holes on the right (left) side panel.
(Refer to Fig. 11)
2. Carry out piping (refrigerant and drain) and wiring (connecting outdoor and indoor units) through the
holes on the side panel.
(See dimensions shown in
Fig. 15
for forming refrigerant piping.)
‹In case of rear piping›
1. Open the knock out holes on the rear panel.
(Refer to Fig. 14)
2. Carry out piping (refrigerant and drain) and wiring (connecting outdoor and indoor units) through the
holes on the rear panel.
(See dimensions shown in
Fig. 15
for forming refrigerant piping.)
CAUTION
In case of rear side piping, be careful not to damage fan motor lead wire.
When opening the knock out hole, be careful not to damage fan motor lead wire with the steel plate cut
off.
(Refer to Fig. 16)
.
‹In case of downward piping›
1. Cut holes in the indicated area of the bottom frame.
(Refer to Fig. 14)
2. Carry out piping (refrigerant and drain) and wiring (connecting outdoor and indoor units) through the
holes on the bottom frame.
Gas side
Liquid side
Gas pipe thermal
insulation
Liquid pipe thermal
insulation
O.D. 15.9mm
O.D. 9.5mm
O.D. 15.9mm
I.D. 10-14mm
Minimum bend radius - 30mm or more
I.D. 17-21mm
Thickness 0.8mm (C1220T-O)
Thickness 0.5mm
Thickness
≥
13mm
Thickness
≥
10mm
Gas pipe
Inter-unit wire
Liquid pipe
Drain hose
Finishing tape
Gas pipe
insulation
Liquid pipe
insulation
Bottom frame
Knock out holes for piping (Select either one)
(left and right side panels and rear panel)
Through holes for wiring (Select either one)
(left and right side panels)
Side panel
Fig. 11
* Put the attached hole protection rubber (3) ( )
after making the opening.
* Put the attached bush (4) ( ) after making the opening.
3PEN486970-1D.book Page 11 Monday, July 24, 2017 8:54 AM
