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Airtight test
Evacuation
Airtight test should be made by pressurizing nitrogen gas to 3Mpa.
For the test method, refer to the following figure.
(Make a test with the valve closed. Be also sure to pressurize both liquid and gas pipe.)
The test result can be judged good if the pressure has not been reduced after leaving
for about one day after completion of nitrogen pressurization.
Evacuation should be made from the service port provided on the outdoor unit’s valve to
the vacuum pump commonly used for both liquid pipe and gas pipe.
(Make evacuation from both liquid pipe and gas pipe with valve closed.)
Remember :Never carry out air purge by refrigerant.
Additional refrigerant charge
The mount of refrigerant charged in this unit is a appropriate for 5-meter long refrigerant pipes.
Refer to the table below and add the corresponding amount of refrigerant if the pipes are
extended.
(The refrigerant is charged in the outdoor unit.)
Vacuum pump
a
a
b
b
c
c
d
d
e
e
f
f
g
g
h
h
i
i
j
j
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
Nitrogen gas
To indoor unit
System analyzer
Low knob
High knob
Valve
Liquid gas
Gas pipe
Outdoor unit
Service port
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
To indoor unit
System analyzer
Low knob
High knob
Valve
Liquid gas
Gas pipe
Outdoor unit
Service port
PUH-7
PUH-8
PUH-10
PUH-15
PUH-20
PU-7
unit 10m 15m 20m 25m
30m
charge
mount
R-22
(kg)
0.8
Refrigerant piping length
35m
40m 45m 50m
PUH-5
1.6 2.4 3.2 4.0 4.8 5.6 6.4 7.2
5m
0
PUH-8
PUH-10
Factory charge
charge
mount
R-22
(kg)
PUH-5
Side blow
Upper blow
5.7
6.6
2x6.6
2x9.7
2x4.8
2x9.7
PU-8
PU-10
PU-15
PU-20
0.8 1.6 2.4 3.2 4.0 4.8 5.6 6.4 7.20
PUH-7
PUH-8
PUH-10
PUH-15
PUH-20
PU-7
PU-8
PU-10
PU-15
PU-20
9.9
5.7
5.0
8.7
0.8 1.7 2.5 3.3 4.2 5.0 5.8 6.7 7.50
The outdoor unit of PE-5,8,10 have side
blow type and upper blow type.
Factory charge refer to the table below.
Outdoor unit
2x1.7 2x2.5 2x3.3 2x4.2 2x5.0 2x5.8 2x6.72x0.80
2x7.5
2x1.6 2x2.4 2x3.2 2x4.0 2x4.8 2x5.6 2x6.42x0.80
2x7.2
6.6
9.9
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.50
5.0