Installing The Outdoor Unit - Gree GWHD24NK3FO Service Manual

8.2 Installing the Outdoor Unit

Use bolts to secure the unit to a flat, solid floor.
When mounting the unit on a wall or the roof, make
sure the support is firmly secured so that it cannot
move in the event of intense vibrations or a strong
wind.
Do not install the outdoor unit in pits or air vents
Installing the pipes
Use suitable connecting pipes and equipment for the
refrigerant R410A.
Models(m)
Max. connection
pipe length
Max. connection
pipe length(Simple
one indoor unit)
The refrigerant pipes must not exceed the maximum
heights 10m.
Wrap all the refrigerant pipes and joints.
Tighten the connections using two wrenches working
in opposite directions.
Caution: Installation Must be Performed in Accordance
with the NEC/CEC by Authorized Personnel Only.
Humid air left inside the refrigerant
pressor malfunction. After having connected the indoor
and outdoor units, bleed the air and humidity from the
refrigerant circuit using a vacuum pump.
1.Unscrew and remove the caps from the 2-way and 3-
way valves.
2.Unscrew and remove the cap from the service valve.
3.Connect the vacuum pump hose to the service valve.
4.Operate the vacuum pump for 10-15 minutes until an
absolute vacuum of 10 mm Hg has been reached.
5.With the vacuum pump still in operation, close the
low-pressure knob on the vacuum pump coupling. Stop
the vacuum pump.
6.Open the 2-way valve by 1/4 turn and then close it
.
after 10 seconds Check all the joints for leaks using
liquid soap or an electronic leak device.
7.Turn the body of the 2-way and 3-way valves. Discon-
nect the vacuum pump hose.
8.Replace and tighten all the caps on the valves.
Diameter (mm)
Φ6
Φ9.52
Φ16
Φ12
Φ19
18K unit need to be installed the indoor unit
18K Model:
36
18K 24K 24K 28K
20 20 60 70
10 10 20 20
circuit can cause com-
Twisting moment (N.m)
15-20
35-40
60-65
45-50
70-75
conversion joint
Installthedrainfittingandthedrainhose(for
modelwithheatpumponly)
Condensation is produced and flows from the outdoor unit
when the appliance is operating in the heating mode. In order
not to disturb neighbours and to respect the environment,
install a drain fitting and a drain hose to channel the conden-
sate water. Install the drain fitting and rubber washer on the
outdoor unit chassis and connect a drain hose to it as shown
in the figure.
18K
Vacuum pump
Vacuum pump
INDOOR
UNIT
Refrigerant fluid direction of flow
3-way valve
(7) Turn to open fully
Service
inlet
(2) Turn
(8) Secure
Valve cap
Service Manual
24／28K
Vacuum pump
(8) Secure
2-way valve
(6) Open by 1/4 turn
(7) Turn to open fully
Valve cap
(2) Turn
(8) Secure
(2) Turn
Connect to the
indoor unit
Installation and Maintenance