outdoor unit
indoor unit
gas side
liquid side
half union
hi stop valve
(2-way valve)
caution
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
valve body
flare nut
cap
charge port
valve stem
stopper
Make sure to follow the torque table value as below:
Outer diameter (mm) Torque (N.m)
6.35 (1/4”)
15-16
9.52 (3/8”)
31-32
12.70 (1/2”)
40-41
15.88 (5/8”)
45-46
Using the vacuum pump
1 Completely tighten the flare nuts on A, B, C 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 the manifold to the
vacuum pump.
3 Fully open the low handle of the manifold valve.
4 Open the vacuum pump for vacuumisation. At the beginning,
slightly loosen the flare nut 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). Then tighten the flare nut.
5 Keep vacuuming for more than 15 minutes and make sure the
reading of multimeter is -1.0 x 10 Pa (-76cmHg). Then fully close
the low handle of manifold valve and stop the operation of the
vacuum pump.
6 Turn the stem of the stop valve B (2-way valve) about 45
counterclockwise for 6~7 seconds after the gas coming out,
then tighten the flare nut again. Make sure the 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.
multimeter
-76cmHg
outdoor unit
manifold
valve
high handle
changing hose
low pressure
valve
charging hose
vacuum pump
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