Gree GWH07AAAXA-K3NNA5A Service Manual page 49

(2) Fix the support of outdoor unit on the selected location with
expansion screws.
(1) Take sufficient protective measures when installing the
outdoor unit.
(2) Make sure the support can withstand at least four times the
unit weight.
(3) The outdoor unit should be installed at least 3cm above the
floor in order to install drain joint.(As show in Fig.18)
(4) For the unit with cooling capacity of 2300W~5000W, 6
expansion screws are needed; for the unit with cooling capacity
of 6000W~8000W, 8 expansion screws are needed; for the unit
with cooling capacity of 10000W~16000W, 10 expansion screws
are needed.
At least 3cm above the floor
Fig.18
2. Install Drain Joint(Only for cooling and heating unit)
(1) Connect the outdoor drain joint into the hole on the chassis.
(2) Connect the drain hose into the drain vent.(As show in Fig.19)
3. Fix Outdoor Unit
(1) Place the outdoor unit on the support.
(2) Fix the foot holes of outdoor unit with bolts.(As show in Fig.20)
Foot holes
Foot holes
Fig.20
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
46
Drain vent
Chassis
Drain hose
Outdoor drain joint
Fig.19
handle
screw
Fig.21
cross-hole
Pipe joint
Union nut
Fig.22
(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)
(2) Fix the power connection wire and signal control wire with
wire clip (only for cooling and heating unit).
07K ~ 24K
N(1) 2
yellow-
blue black
green
Indoor unit connection
Note: the wiring connect is for reference only,please refer to the
actual one.
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.
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
Note:
(1) The through-wall height of drain hose shouldnt be higher than
the outlet pipe hole of indoor unit.(As show in Fig.25)
(2) Slant the drain hose slightly downwards. The drain hose cant
Service Manual
Tightening torque (N . m)
15~20
30~40
45~55
60~65
70~75
28K
4 5
N(1) 2 3 4
blue black brown violet
violet orange
yellow-
green
Indoor unit connection
Fig.23
The drain hose
can't raise
upwards.
Fig.25
Installation and Maintenance
5
orange