8
9
Purging the Unit
4.2
On delivery, the indoor unit is loaded with an inert gas. All this gas must therefore be purged before
connecting the assembly piping.
1. Remove the caps at the end of each refrigerant tube the inert gas will escape from the
indoor unit.
During installation the inside tube should be cleanly , do not remove the caps until ready to connect
the tubes.
Installing and Connecting the Refrigerant Tube
4.3
There are two refrigerant tubes of differing diameters:
- A smaller one for the liquid refrigerant.
- A larger one for the gas refrigerant.
A short length of piping is already fitted to the air conditioner. You must extend this tube
using assembly tube.
Recommended size at the refrigerant tube
Model
09,000
12,000
18,000
25,000
30,000
Refrigerant
tube (inch)
1/4
1/4
3/8
3/8
Return gas
tube (inch)
1/2
1/2
1/2
5/8
5/8
1. With a knife, cut out the appropriate knockout piece on the rear of the indoor unit.
1. Smooth the cut edges.
1. Use flare connector to connect the refrigerant tube between the indoor unit and outdoor unit.
Note:
If the tube must be extended, refer to cutting/extending the tube.
Cutting/Extending the tube
In recommended, the refrigerant tubes are
not over than 5 m eters. If necessary, the
length can be up to 30 meters, but the refrigerant must be added to the circuit according table
below:
Class
Connection
Pipe Length
Air-purge
Method
At installation
Refrigerant
Adjustment
5m Max.
Unnecessary
Refer to the detailed
Air-Purge Procedure
and Vacuum Tube Procedure
For o 1/4 tube adds 13 g.
Of refrigerant (R-410
A
)
for every 1 m.
For o 3/8 tube adds 58 g.
Of refrigerant (R-410
A
)
for every 1 m.
5-30m
3
6
5
4
7
Air outlet
Air inlet
Drain hose
Water inlet
Plug for water tray
1/4
