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Connecting the refrigerant pipe
There are two refrigerant pipes of differing diameters:
- A smaller one for the liquid refrigerant
- A larger one for the gas refrigerant
- The inside of copper pipe must be clean and has no dust.
1.
Remove the pinch pipe on the pipes and connect the assembly pipes to
each pipe, tightening the nuts, first manually and then with a torque
wrench, a spanner applying the following torque.
Outer Diameter
ø6.35mm(1/4")
ø9.52mm(3/8")
ø12.70mm(1/2")
ø15.88mm(5/8")
ø19.05mm(3/4")
ø22.23mm(7/8")
- If the pipes must be shortened, refer to page 14.
2.
Must use insulator which is thick enough to cover the refrigerant pipe
to protect the condensate water on the outside of pipe falling onto the
floor and the efficiency of the unit will be better.
3.
Cut off any excess foam insulation.
4.
Be sure that there must be no crack or wave on the bended area.
5.
It would be necessary to double the insulation thickness[10mm(3/8")
or more] to prevent condensation even on the insulator when if the
installed area is warm and humid.
• Connect the indoor and outdoor units using pipes with flared connections(not supplied). For the lines, use
insulated, unwelded, degreased and deoxidized copper pipe, (Cu DHP type to ISO 1337), suitable for operating
pressures of at least 4200kPa and for a burst pressure of at least 20700kPa. Copper pipe for hydro-sanitary
applications is completely unsuitable.
• For sizing and limits, (height difference,line length,max.bends, refrigerant charge,etc.) see the outdoor unit
installation manual.
• All refrigerant connection must be accessible, in order to permit either unit maintenance or removing it
completely.
Torque [N•m(Ibf.ft)]
18(13.2)
42(31.0)
55(40.5)
65(47.9)
100(73.7)
100(73.7)
Refrigerant oil
Torque
wrench
Flare nut
Union
Clamp
Insulation
Insulation
refrigerant
refrigerant pipe
pipe
Gas
refrigerant
pipe
Liquid refrigerant pipe
The designs and shape are subject to change
according to the model.
Spanner
13
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