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Connecting the Indoor Unit Assembly Piping
There are two refrigerant pipes of differing diameters:
◆ A smaller one(6.35mm, 1/4
"
) for the liquid refrigerant
◆ A larger one(15.88mm, 5/8
"
) for the gas refrigerant
◆ The thickness of tube should not less than 1.0mm(1/16
")
.
◆ The inside of copper tube must be clean & has no dust.
The connection procedure for the refrigerant pipes varies according to the exit
position of the pipes from the indoor unit, as seen when facing the indoor in
the “A” side.
◆ Liquid refrigerant port
◆ Gas refrigerant port
Remove the protection caps on the pipes and connect the assembly
pipes to each pipe, tightening the nuts, first manually and then with a
wrench, a spanner applying the following torque.
Must use insulator which is thick enough to cover the refrigerant tube to
protect the condensate water on the outside of pipe falling onto the floor
and the efficiency of the unit will be better.
1
2
Cut off any excess foam insulation.
3
Be sure that there must be no crack or wave on the bended area.
4
It would be necessary to double the insulation thickness(10mm/ " or
more) to prevent condensation even on the insulator when if the installed
area is warm and humid.
5
Shape an oil trap as shown in figure. The oil trap must be formed every
level difference of 6m(20ft).
6
For further details on connecting up to the outdoor unit and purging the
refrigerant circuit, refer to page 49.
7
◆ If the pipes must be shortened refer to page 45.
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◆ The pipes will be insulated and fixed permanently into position
once the whole installation has been tested for gas leaks;
refer to page 53 for further details.
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(2")
5cm
Outer Diameter Torque (kgf•cm)
6.35 mm (1/4") 160(11 ft•lb)
15.88 mm (5/8") 400(29 ft•lb)
Liquid refrigerant port
Gas refrig-
erant port
A
Radius
Oil trap
(suction tube)
Outdoor unit
Indoor unit
Oil trap(Must be installed
every 6m/20ft)
Oil trap(Must be installed
every 6m/20ft)
Outdoor unit
Indoor unit
a. When the indoor unit is above the outdoor
unit
b. When the outdoor unit is above the indoor
unit
E-
44
3
5
3
8