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5. INSTALLING DRAIN PIPES
5.1A. Installing drain pipes (Ceiling concealed type)
Use general hard polyvinyl chloride pipe and connect it with adhesive (polyvinyl chloride)
so that there is no leakage.
Always heat insulate the indoor side of the drain hose.
Use a drain pipe that matches the size of the drain hose (Table A).
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supports when long pipes are installed.
• Use an insulation material as needed, to prevent the pipes from freezing.
• Install the pipes in a way that allows for the removal of the control box.
Table A
O.D.
Drain pipe
32 mm(VP25)
CEILING CONCEALED TYPE (Use Drain Pump)
Outlet air
flow
Arrange the drain hose
lower than this port.
Drain hose
Trap
OK
NO GOOD
Drain cap
NO GOOD
Rise
Air bleeding
Supporter
NO GOOD
1.5 to 2 m
OK
• Install the drain pipe with downward gradient (1/50 to 1/100) and so there are no rises
or traps in the pipe.
• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm] and
connect it with adhesive (polyvinyl chloride) so that there is no leakage.
• When the pipe is long. Install supports.
• Do not perform air bleeding.
• Always heat insulate the indoor side of the drain pipe.
VP25
[O.D 32 mm
or more]
Horizontal or
upward gradient
Supporter
Gap of 1.5-2 m
Locally arranged pipe
Max.
300 mm
700 mm or less
Rise
Air bleeding
BAD
Trap
Observe the following procedures to construct centralized drain pipe fittings
.
VP30 or more [O.D 38 mm or more]
Downward gradient 1/100 or more
700 mm or less
WARNING
• Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat
exchange erosion may occur)
• Insulate the parts properly so that water will not drip from the connection parts.
• Check for proper drainage after the construction by using the visible portion of
transparent drain port and the drain piping final outlet on the body.
CAUTION
• Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping)
5.1B. Installing drain pipes (Wall mounted type/Floor
standing concealed type)
NO GOOD
OK
NO GOOD
Rise
Trap
Drain
cap
CAUTION
• Drain pump cannot be used if it is installed in wall mounted type/floor standing
concealed type.
• Set “7.4.Jumper wire setting of Drainage function setting (JM1)”.
• Be sure to connect the pipes for drainage without leakage.
• To avoid condensation and dripping, always insulate the indoor drain pipe.
5.2. Install the drain pipe
(1) Be sure to use supplied Drain hose
1
and Hose band
2
2
Hose band
Drain
hole
1
Drain hose
Hard PVC side
•
When drain pump is used.
(Ceiling concealed type only)
Hose band
4 mm or less
20 mm
•
When drain pump is not used.
(Natural drainage)
Joint pipe
(Field supply)
Drain pipe (VP25)
(Field supply)
Applying
area of
adhesive
4 mm or less
CAUTION
• When drain pump is not used, do not connect the accessory drain hose and soft PVC
hose directly
.
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