7
3. Installation Method
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 a 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 a
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 flow drain hose of indoor unit.
13
Connecting the cable between outdoor
Preparation of the operating
and 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
(Use the remote control or display of the
indoor unit)
1) Procedure
