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6.2 Installation Method
1) Procedure
No. Installation works Descriptions
1 Preparation of tools and installation parts Preparation of installation
2 Flaring the pipes To insert the flare nuts, mounted on the connection
parts of both indoor and outdoor unit, onto the
copper pipes.
3 Pipe bending To reduce the flow resistance of refrigerant.
4 Connection of installation parts Connection of long piping
(elbows, socket etc)
5 Tighten the flare nut (outdoor) Connecting the pipings of the outdoor unit.
6 Blowing the pipings To remove dust and scale in working.
7 Tighten the flare nut (indoor) Connecting the pipings of the indoor unit.
8 Check the gas-leakage of the connecting
part of the pipings.
9 Air purging of the piping and indoor unit The air which contains moisture and which
remains in the refrigeration cycle may cause malfunction
on the compressor
10 Open the 3-way (liquid side) and
3-way (gas side) valves.
11 Form the pipings To prevent heat loss and sweat
12 Checking the drainage (indoor unit) To ensure if water flows drain hose of indoor unit.
13 Connecting the cable between outdoor and Preparation of the operating
indoor unit
14 Connecting the main cable to outdoor unit
15 Supply the power to the crankcase heater To prevent the liquid back to the compressor.
(before the operating the unit) (Heat pump only)
16 Cooling operation, Heating operation To confirm the operation of the unit.
(Use the remote controller or display of the indoor unit)
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