Service manual
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8.3 Pipe length and the elevation
Standard
length
Max.
Max.
Additional
(m)
Elevation
Elevation
refrigerant
Btu/h
GAS
LIQUID
B (m)
A (m)
(g/m)
28k
5/8’’ (
φ
16.0)
3/8’’ (
φ
9.52)
5
10
20
65
36K
5/8’’ (
φ
16.0)
3/8’’ (
φ
9.52)
5
15
30
65
Pipe size
Capacity
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
8.4 Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak
detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it
will affect the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it
prevents the gas leakage from the refrigeration cycle.
In case that
more than
5
