Vacuum Pumping And Leak Detection - Gree GEH09AA-K3DNA1B Service Manual

2. Install Drain Joint(Only for cooling and heating unit)
(1) Connect the outdoor drain joint into the hole on the chassis.
3. Fix Outdoor Unit
(1) Place the outdoor unit on the support.
4. Fix Outdoor Unit
(1) Remove the screw on the right handle of outdoor unit and then remove the handle.
(2) Remove the screw cap of valve and aim the pipe joint at the bellmouth of pipe.
(3) Pretightening the union nut with hand.
(4) Tighten the union nut with torque wrench .
Refer to the following table for wrench moment of force:
5. Connect Outdoor Electric Wire
(1) Remove the wire clip; connect the power connection wire to the
wiring terminal according to the color; fix them with screws.
(2) Fix the power connection wire with wire clip.
Note:
(1) After tightening the screw, pull the power cord slightly to
check if it is firm.
(2) Never cut the power connection wire to prolong or shorten
the distance.

8.6 Vacuum Pumping and Leak Detection

1. Use Vacuum Pump
(1) Remove the valve caps on the liquid valve and gas valve and the nut of
refrigerant charging vent.
(2) Connect the charging hose of piezometer to the refrigerant charging vent of
gas valve and then connect the other charging hose to the vacuum pump.
(3) Open the piezometer completely and operate for 10-15min to check if the
pressure of piezometer remains in -0.1MPa.
(4) Close the vacuum pump and maintain this status for 1-2min to check if the
pressure of piezometer remains in -0.1MPa. If the pressure decreases, there
may be leakage.
(5) Remove the piezometer, open the valve core of liquid valve and gas valve
completely with inner hexagon spanner.
(6) Tighten the screw caps of valves and refrigerant charging vent.
40
(2) Connect the drain hose into the drain vent.
(2) Fix the foot holes of outdoor unit with bolts.
Hex nut diameter(mm) Tightening torque(N m)
Φ6
Φ9.52
Φ12
Φ16
Φ19
Liquid pipe
Liquid
gas pipe
valve
gas valve
.
15~20
30~40
45~55
60~65
70~75
blue
Connect to indoor unit
Liquid valve
Gas valve
Refrigerant charging
vent
Nut of refrigerant
Charging vent
Service Manual
Foot holes
Foot holes
screw
handle
Pipe joint
Union nut
2 3
yellow-
black
brown
green
Piezometer
Lo Hi
Valve cap
Vacuum pump
Inner hexagon
spanner
Close
Open
Installation and Maintenance