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TECHNICAL DATA FOR REPAIR
2. Refrigerant System
Item Standard value Remark
Indoor unit temper-
ature difference
(Intake-Discharge)
In cooling ΔT=18 ~ 27 ℉ (10 ~ 15 ℃ )
It's vary according to
the envitonmental con-
ditions or indoor units.
The values are only for
reference.
In heating ΔT=27 ~ 36 ℉ (15 ~ 20 ℃ )
Refrigerant permis-
sible piping length
and height differ-
ence between
indoor and outdoor
units
Permissible piping length
(Equivalent length / Actual length)
623/541 ft (190/165 m)
Permissible
height
difference
between
indoor and
outdoor units
Outdoor unit installed
above indoor units
164 ft (50 m)
Outdoor unit installed
below indoor units
131 ft (40 m)
Refrigerant line size
Liquid line
8 TON 1/2 inch (Φ12.7 mm)
(Brazing)
15 TON 5/8 inch (Φ15.9 mm)
Vapor line
8 TON 1-1/8 inch (Φ28.6 mm)
15 TON 1-1/4 inch (Φ31.8 mm)
Flare nuts
tightening torque
Nominal
outer
diameter
1/4 inch (6.35 mm)
10.4 ~ 13.3 lb·ft
(14 ~ 18 N·m)
3/8 inch (9.52 mm)
25.2 ~ 31.0 lb·ft
(34 ~ 42 N·m)
1/2 inch (12.70 mm)
36.3 ~ 45.1 lb·ft
(49 ~ 61 N·m)
5/8 inch (15.88 mm)
50.3 ~ 60.7 lb·ft
(68 ~ 82 N·m)
3/4 inch (19.05 mm)
74.0 ~ 88.8 lb·ft
(100 ~ 120 N·m)
Outdoor heat exchanger liquid flow
control valve registance value
Sub heat exchanger liquid flow
control valve registance value
Connector
[red]-[white],
[red]-[orange],
[brown]-[yellow],
[brown]-[blue]
8 TON 46 ± 4 Ω
When the electronic
expansion valve is 5
cores (without brown),
substitute red core for
brown core.
15 TON 34.3 ± 4.3 Ω
Connector
[white]-[orange],
[yellow]-[blue]
8 TON 92 ± 8 Ω
15 TON 68.6 ± 8.6 Ω
Refrigerant high pressure switches 1,2 registance value
Less than1 Ω,
1 MΩ or more
2 : 15 TON only
Subcooling valve registance value
Oil bypass control valve registance
value
Connector
[red]-[white],
[red]-[orange],
[brown]-[yellow],
[brown]-[blue]
46 ± 4 Ω
When the electronic
expansion valve is 5
cores (without brown),
substitute red core for
brown core.
Connector
[white]-[orange],
[yellow]-[blue]
92 ± 8 Ω
Compressor clutch 2 registance value 4 Ω ± 20 %
Hot gas bypass valve registance value 1,050 Ω
Reversing valve registance value 950 Ω
Electromagnetic compressor capacity valves 1,2
registance value
1,050 Ω
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