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Liquid side service valve
Gas side service valve
Indoor unit
Outdoor unit
Open the manifold gauge valve connected to the liquid
service valve and add refrigerant to reach the fixed
quantity noting the scale.
NOTE
∙ If you cannot add refrigerant when the operation of
the outdoor unit is stopped, open the gas and liquid
service valves and add remaining refrigerant by
pressing the cooling trial operation button.
∙ After charging, completely open the spindles of
the both the gas and liquid side service valves by
rotating them anti-clockwise. (Do not press them
further if the spindle hits the stopper.)
∙ Fasten the caps of the service valves for the gas and
liquid pipes including the cap nut of the charging
port.
– There may be slight refrigerant leakage when you
open the spindle with a wrench. This is not a failure
of the product.
– Use a wrench that can apply the appropriate force.
Charging core
R-22: Thread of the screw - 7/16-2OUNF
R-410A: Thread of the screw -1/2-2OUNF
Tightening torque for charging port cap (Refer to the table)
Manifold gauge
High pressure
side
Low pressure
side
(Scale)
Ref.
Vacuum
pump
Tightening torque for body cap
(Refer to the table)
Spindle
Outer diameter
Body cap
(mm)
(N•m)
ø 6.35
20 to 25
ø 9.52
20 to 25
ø 12.70
25 to 30
ø 15.88
30 to 35
Over ø 19.05
35 to 40
(1 N•m = 10 kgf•cm)
NOTE
∙ Be extra cautious for the gas leakage from the 3-way
valve's stem nuts (gas side), and from the service port
cap.
Pressure table for each temperature
If extra refrigerant charging is required due to gas
leakage or product relocation, see the following table.
Cooling operation
Indoor temperature (°C)
(Dry bulb /
Wet bulb)
Outdoor temperature (°C)
46
35
21
7
-15
NOTE
∙ Pressure for each temperature was measured at the
gas side service valve.
Tightening torque
Charging port cap
(N•m)
10 to 12
Unit: [kPa, G]
32/23
27/19
21/15
1040
850
730
920
750
640
830
690
590
690
540
490
550
400
370
English
43
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