,QVWDOODWLRQ0DQXDO
,QVWDOOLQJWKH2XWGRRU8QLW
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
Use suitable connecting pipes and equipment for the
refrigerant R410A.
Wrap all the refrigerant pipes and joints.
Tighten the connections using two wrenches working
in opposite directions.
Humid air left inside the refrigerant
circuit can cause com-
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.
INDOOR
UNIT
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.
Vacuum pump
Vacuum pump
Vacuum pump
Connect to the
indoor unit
Twisting moment (N.m)
Diameter (mm)
15-20
35-40
60-65
45-50
70-75
18K unit need to be installed the indoor unit
conversion joint
Caution: Installation Must be Performed in Accordance
with the NEC/CEC by Authorized Personnel Only.
(8) Secure
18K Model:
18K
24
／
28K
Installing the pipes
Φ6
Φ9.52
Φ16
Φ12
Φ19
2-way valve
Refrigerant fluid direction of flow
3-way valve
Service
inlet
(8) Secure
Valve cap
Valve cap
(2) Turn
(2) Turn
(2) Turn
(8) Secure
(7) Turn to open fully
(7) Turn to open fully
(6) Open by 1/4 turn
The refrigerant pipes must not exceed the maximum
heights
10m.
Models(m)
Max. connection
pipe length
Max. connection
pipe length(Simple
one indoor unit)
18K
28K
20
20
20
20
24K
20
20
Summary of Contents for GWHD(18)NK3FO
Page 3: ...6XPPDU DQG HDWXUHV 6XPPDU DQG HDWXUHV 2XWGRRU 8QLW 0RGHOV 3URGXFW RGH 1 2 1 2 1 2 1 2...
Page 8: ...RQVWUXFWLRQ 9LHZV RQVWUXFWLRQ 9LHZV 0RGHO 1 2 8QLW PP 0RGHOV 1 2 1 2 1 2...
Page 24: ...SORGHG 9LHZV DQG 3DUWV LVW SORGHG 9LHZV DQG 3DUWV LVW 0RGHO 1 2...
Page 26: ...SORGHG 9LHZV DQG 3DUWV LVW 0RGHO 1 2...
Page 28: ...SORGHG 9LHZV DQG 3DUWV LVW 0RGHO 1 2...
