Purging Method: To Use Vacuum Pump - Haier AU182XFERA Installation Manual

Purging method: to use vacuum pump

.Detach the service portis cap of 3-way valve, the
valve rod's cap for 2-way valve and 3-way valves, 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.
.Open the handle at low in gaugemanifold, operate
vacuum pump. If the scale-moves of gause (low) reach
vacuum condition in a moment, check
.Vacuumize for over 15min. And check the level gauge
which should read -0.1MPa (-76 cm Hg) at low pressure
side. After the completion of vacuumizing, 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
.Open the valve rod for the 2-way valve to and an angle
of anticlockwise 90 degree. After 6 seconds, close the 2-
way valve and make the inspection of gas leakge.
.No gas leakage?
.Detach the charge hose from the service port, open
2-way valve and 3-way. Turn the valve rod
anticlockwise until hitting lightly.
.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.
.Take the same steps from
to ensure a completely vacuum for the whole system.
CAUTION: If the refrigerant of the air conditioner leaks,
it is necessary to make all the refrigerant out. Vacuumize
first, then charge the liquid refrigerant into air conditioner
according to the amount marked on the name plate.
again.
.
In case of gas leakage, tighten
parts of pipe connection. If
leakage stops, then proceed
steps.
to for each ways
If it does not stop gas leakage, discharge
whole refrigerants from the service port.
After flaring work again and vacuumize,
fill up prescribed refrigerant from the
gas cylinder.
2 way valve
3 way valve
3 way valve
2 way valve
3 way valve
2 way valve
3 way valve
2 way valve
3 way valve
2 way valve
3 way valve
2 way valve
18
Liquid stop valve
Gas stop valve
2 way valve
3 way valve
Gauge maifold(R410A)
Vacuum pump(R410A)
Open
Close
2 way valve
3 way valve
o
90
Service port
2 way valve
3 way valve
Service port cap
9.52mm
To indoor unit A
(3/8")
6.35mm
(1/4")
9.52mm
To indoor unit B
(3/8")
6.35mm
(1/4")
To indoor unit C
9.52mm
(3/8")
6.35mm
(1/4")
9.52mm To indoor unit D
(3/8")
6.35mm
(1/4")
9.52mm To indoor unit E
(3/8")
6.35mm
(1/4")
o
90 for 6 sec.
Valve rod cap
Valve rod cap