Vacuum Pumping And Leak Detection - GREE ELECTRIC GWH07AGA-K6DNA1A/O Service Manual

NOTE:
● When there're multiple cables passing through
it, the cross-hole of handle should be knocked off
and eliminate the sharp burrs for avoid damaging
the cables. Only applicable for some models.
4. Connect Indoor and Outdoor Pipes
(1) Remove the screw on the right handle of outdoor unit and then
remove the handle. (As show in Fig.21)
(2) Remove the screw cap of valve and aim the pipe joint at the
bellmouth of pipe. (As show in Fig.22)
Liquid pipe
Liquid
gas pipe
valve
gas valve
(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:
Piping size (inch)
1/4
3/8
1/2
5/8
3/4
5. Connect Outdoor Electric Wire
(1) Remove the wire clip; connect the power connection wire and
signal control wire (only for cooling and heating unit) to the wiring
terminal according to the color; fix them with screws. (As show in
Fig.23)
yellow-
green
NOTICE:
● The wiring board is for reference only, please refer to the actual one.
(2) Fix the power connection wire and signal control wire with wire
clip (only for heat pump models).
72
cross-hole
Pipe joint
Union nut
Fig.22
Tightening torque (N . m)
15~20
30~40
45~55
60~65
70~75
N(1) 2 L(3)
yellow-
brown
blue black brown blue green
(black)
N L
Indoor unit connection POWER
Fig.23
NOTICE:
● After tightening the screw, pull the power cord slightly to check
if it is firm.
● Never cut the power connection wire to prolong or shorten the
distance.
6. Neaten the Pipes
(1) The pipes should be placed along the wall, bent reasonably
and hidden possibly. Min. semidiameter of bending the pipe is
10cm.
(2) If the outdoor unit is higher than the wall hole, you must set
a U-shaped curve in the pipe before pipe goes into the room,
in order to prevent rain from getting into the room. (As show in
Fig.24)
Wall
U-shaped curve
Drain hose
Fig.24
NOTICE:
● The through-wall height of drain hose shouldnt be higher than
the outlet pipe hole of indoor unit.(As show in Fig.25)
● Slant the drain hose slightly downwards. The drain hose cant
be curved, raised and fluctuant, etc.(As show in Fig.26)
● The water outlet cant be placed in water in order to drain
smoothly.(As show in Fig.27)
The drain hose can't be fluctuant
The drain
hose can't
The water
be fluctuant
outlet can't
be fluctuant
Fig.26

8.7 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.
Service Manual
The drain hose
can't raise
upwards.
Fig.25
The water outlet
can't be placed
in water
Fig.27
Installation and Maintenance