5
English
Piping Length & Elevation
If the pipe is too long, both the capacity and reliability of the unit will
drop. As the number of bends increases, resistance to the flow of
refrigerant system increases, thus lowering cooling capacity. As a
result, the compressor may become defective. Always choose the
shortest path and follow the recommendations as tabulated below:
REFRIGERANT PIPING WORK
Outdoor Unit
Indoor Unit
Piping Works
•
Do not use contaminated or damaged copper tubing. Do not
remove plastic, rubber plugs and brass nuts from the valves,
fittings, tubings and coils until you are ready to connect suction
or liquid line into valves or fittings.
•
If any brazing work is required, ensure that the nitrogen gas is
passed through coil and joints while the brazing work is being
done. This will eliminate soot formation on the inside walls of
the copper tubings.
•
Cut the connection pipe with a pipe cutter.
•
Remove burrs from cut edges of the pipes with remover.
Hold the end of the pipe downwards to prevent metal chips from
entering the pipe.
•
Insert the flare nuts, mounted on the connection parts of both the
indoor unit and outdoor unit onto the copper pipes.
•
Flare the pipe with extra length above the flaring tool as shown
in the table.
•
The flared edge must be even and not cracked or scratched.
1/4t
Cutting Copper Tube
Remove Burr
Copper Tube
Swaging
Block
Remark:
The refrigerant pre-charged in the outdoor unit is for piping length up to 7.62 m/ 25 ft.
Model
FT20FV1M
FT25FV1M
FT28FV1M
FT35FV1M
FT50FV1M FT60FV1M9
Maximum length, m (ft), L
12 (39)
12 (39)
12 (39)
12 (39)
15 (49)
15 (49)
Max. elevation, m (ft), H
5 (16.4)
5 (16.4)
5 (16.4)
5 (16.4)
8 (26.2)
8 (26.2)
Max. number of (90˚) bends
10
10
10
10
10
10
Liquid pipe size
1/4”
1/4”
1/4”
1/4”
1/4”
3/8”
Gas pipe size
3/8”
3/8”
3/8”
1/2”
5/8”
5/8”
Ø Tube, D
A (mm)
Inch
mm
Imperial
Rigid
1/4"
6.35
1.3
0.7
3/8"
9.52
1.6
1.0
1/2"
12.70
1.9
1.3
5/8"
15.88
2.2
1.7
3/4"
19.05
2.5
2.0
