Installation Guide
23
evacuation
degree.
Evacuate
Installation Procedure
Piping vavuum method: to use vacuum pump
1.
Detach the service port's cap
of
3-way valve, the valve rod's cap for 2-way
valve and 3-way valves, and connect the service port into the projection
of
charge hose (low) for gaugemanifold. Then connect the projection
of
charge
hose (center) for gaugemanifold into vacuum pump.
2. Open the handle at low
in
gaugemanifold, and operate vacuum pump. If the
scale-moves
of
gause (low) reach vacuum condition
in
a moment, check
the step 1 again.
3. Vacuumize for over 15min. check the level gauge which should read -
0.1
MPa (-76 cm Hg) at low pressure side. After the completion
of
close the handle 'Lo'
in
the vacuum pump. Check the condition
of
the scale
and hold it for 1-2min. If the scale-moves back
in
spite
of
tightening, make
flaring work again, then return to the beginning
of
the step 3.
4. Open the valve for the 2-way valve to an angle
of
anticlockwise 90
After 6 seconds, close the 2-way valve and make the inspection
of
gas leakge.
2wayvalve
~
3wayvalve
~
Vacuuming
Liquid stop valve
Gas stop valve
Vacuum pump
5. No gas leakage?
In
case
of
gas leakage, tighten parts
of
pipe connection. If leakage stops, then proceed the step 6. If it
does not stop gas leakage, discharge whole refrigerants from the service port. After flaring work again, fill up prescribed
refrigerant from the gas cylinder.
6. Detach the charge hose from the service port, open 2-way valve and 3-way.
Turn the valve rod anticlockwise until hitting lightly.
7.
To
prevent the gas leakage, turn the service ports cap, the valve rodis cap
for 2-way valve and 3-way's a little more than the point where the torque
increases suddenly.
CAUTION:
If the refrigerant
of
the air conditioner leaks, it is necessary to make all the refrigerant out.
the liquid refrigerant into air conditioner according to the amount marked on the nameplate.
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valve \ ,
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Valve rod cap
~
6 Valve rod cap
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Service port cap
first, then charge