En-8
Indoor unit
Drain hose
100 mm
Drain hose insulation
(Accessory)
Hose band (Accessory)
Overlap the heat insulation.
Drain hose insulation
(Accessory)
■
When drain pump is used
Gap of 1.5 to 2 m
700 mm or
less
Horizontal or
upward gradient
Supporter
Max.
300 mm
Locally arranged pipe
GOOD
VP25 [O.D
32 mm or more]
Rise
Air bleeding
PROHIBITED
Trap
Observe the following procedures to construct centralized drain pipe
fi ttings.
VP30 or more [O.D 38 mm or more]
Downward gradient 1/100 or more
700 mm or less
■
When drain pump is not used (Natural drainage)
If the drain pump is not used, please move the position of the drain cap and insulation.
NOTE:
• Install the drain pipe with downward gradient (1/50 to 1/100) and so there are no rises or
traps in the pipe.
Drain
pipe
Outlet
airfl ow
Arrange the drain pipe
lower than this portion
GOOD
• When the pipe is long, install supporters.
Supporter
1.5 to 2 m
Trap
Rise
PROHIBITED
Air bleeding
3. 5. 2. Check for drainage
Pour about 1 liter of water from the position shown in the diagram or from the airfl ow outlet
to the dew tray. Check for any abnormalities such as strange noises and whether the drain
pump functions normally.
CAUTION
Make sure the drain water is properly drained.
3. 6. Pipe installation
WARNING
• During installation, make sure that the refrigerant pipe is attached fi rmly before you
run the compressor.
Do not operate the compressor under the condition of refrigerant piping not attached
properly with 2-way or 3-way valve open. This may cause abnormal pressure in the
refrigeration cycle that leads to breakage and even injury.
• During the pump-down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2-way
or 3-way valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.
• When installing and relocating the air conditioner, do not mix gases other than the
specifi ed refrigerant (R32) to enter the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to
an abnormally high value and cause breakage, injury, etc.
• If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant
comes in contact with a fl ame, it produces a toxic gas.
CAUTION
• Be more careful so that foreign matter (oil, water, etc.) does not enter the piping than
with refrigerant R32 models. Also, when storing the piping, securely seal the openings
by pinching, taping, etc.
• While brazing the pipes, be sure to blow dry nitrogen gas through them.
9381386215-01_IM.indb 89381386215-01_IM.indb 8 12/5/2018 2:57:36 PM12/5/2018 2:57:36 PM
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