Installation Method - LG LP-E5020CL Service Manual

6.2 Installation Method

1) Procedure
No.
1 Preparation of tools and installation parts
2 Flaring the pipes
3 Pipe bending
4 Connection of installation parts
(elbows, socket etc)
5 Tighten the flare nut (outdoor)
6 Blowing the pipings
7 Tighten the flare nut (indoor)
8 Check the gas-leakage of the connecting
part of the pipings.
9 Air purging of the piping and indoor unit
10 Open the 3-way (liquid side) and
3-way (gas side) valves.
11 Form the pipings
12 Checking the drainage (indoor unit)
13 Connecting the cable between outdoor and
indoor unit
14 Connecting the main cable to outdoor unit
15 Supply the power to the crankcase heater
(before the operating the unit)
16 Cooling operation, Heating operation
(Use the remote controller or display of the indoor unit)
Installation works
Preparation of installation
To insert the flare nuts, mounted on the connection
parts of both indoor and outdoor unit, onto the
copper pipes.
To reduce the flow resistance of refrigerant.
Connection of long piping
Connecting the pipings of the outdoor unit.
To remove dust and scale in working.
Connecting the pipings of the indoor unit.
The air which contains moisture and which
remains in the refrigeration cycle may cause malfunction
on the compressor
To prevent heat loss and sweat
To ensure if water flows drain hose of indoor unit.
Preparation of the operating
To prevent the liquid back to the compressor.
(Heat pump only)
To confirm the operation of the unit.
– 26 –
Descriptions