20
Flare nut
Valve body
Charge port
Valve stem
Cap
Stopper
A: Low pressure valve (3-way) - gas side.
B: High pressure valve (2-way) - liquid side.
C and D: they are the ends of indoor unit
connection
Refrigerant
Indoor
Unit
Outdoor
Unit
Lo stop valve
(3-way valve)
Gas side
Liquid side
Hi stop valve
(2-way valve)
Half union
Refer to the valve cap tightening torque value
as below:
tips and information
Outer diam.
(mm)
Torque
(N.m)
Additional
Torque (N.m)
Ɏ´
NJP
19.6 (2.0kg.m)
Ɏ´
NJP NJP
Ɏ´ NJP NJP
Ɏ´ NJP
78.6 (8.0kg.m)
When Using the Vacuum Pump
1
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and D, connect the manifold valve charge
hose (blue) to the charge port of the low
pressure valve (3-way valve) on the gas pipe
side.
2 Connect the other charge hose (yellow) of
manifold to the vacuum pump.
3 Fully open the handle Lo of the manifold
valve.
Open the vacuum pump for vacuumization.
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of the low pressure valve to check if there
is air coming inside (If operation noise of
the vacuum pump has been changed, the
reading of multimeter is 0 instead of minus).
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and make sure the reading of multimeter is
-1.0 x 10
Pa (-76cmHg). Then fully close
the handle Lo of manifold valve and stop the
operation of the vacuum pump.
6 Turn the stem of the stop valve B (2-way
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seconds after the gas coming out, then
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pressure display in the pressure indicator is a
little higher than the atmosphere pressure.
7 Remove the charge hose from the low
pressure charge port.
8 Fully open the valve stems of A (3-way valve)
and B (2-way valve).
9 Securely tighten the stem cap.
Outdoor Unit
Manifold
valve
Multimeter
-76cmHg
Lo Handle
Hi Handle
Charging hose
Low pressure
valve
Charging
hose
Vacuum Pump
