9
4
DRAIN PIPING WORK
REQUIREMENT
• Ensure insulating of the drain pipes and connecting parts on the indoor units.
• The drain pipe should have a downward slope of at least 1/100 and ensure
there are no swells or blockages as this will cause abnormal sounds.
• The maximum traverse length of drain pipe is 20 m. Provide support
brackets at intervals of 1.5 to 2 m where necessary to prevent movement.
• Install the combined piping as shown in the illustration.
• Do not create an air purge in the pipework,
as the water would leak from this point.
• The hard vinyl-chloride pipe cannot be connected
directly to the drain pipe connecting port of the indoor unit.
For connection with the drain pipe connecting port,
ensure that the supplied flexible hose is fitted.
• Adhesive agent cannot be used for the pipe
connecting port (hard socket) on the indoor unit.
Be sure to use the supplied hose band for fixing,
otherwise there is a risk of damage or water
leakage from the drain pipe connecting port.
CAUTION
• Install the drain piping so that the water
drains effectively.
• Apply heat insulation to prevent dew
condensation from forming.
• Incorrectly installed pipework may result
in a water leak.
Pipe material/Insulator and size
The following materials for piping work and insulation
are to be procured locally.
Trap
Arched
shape
Support
bracket
1/100 or more
downward
Heat
insulator
1.5m to 2m
NO
GOOD
As long as possible (10cm)
VP30 or more
Downward slope
1/100 or more
VP25
VP25
VP25
(Collective pipes)
Connection of flexible hose
• Insert the soft socket of the supplied flexible hose
into the connecting port of the drain pipe.
• Align the supplied hose band to the pipe connecting
port end, and tighten.
REQUIREMENT
• Fix the soft socket with the supplied hose
band, tighten at the upper position of the
unit.
• The supplied flexible hose can bend up to
a maximum of 45°
Attached hose band Attached flexible hose
Drain pipe connecting port
(Hard socket)
VP25 vinyl chloride pipe
(Procured locally)
Adhesive agent prohibited
Soft socket
Hard socket
Socket for VP25
(Procured locally)
Riser (Trap)
90˚ Bend
max
45˚
max
45˚
OK
NO GOOD
Socket for VP25 vinyl chloride pipe
(To be local procure)
Align the attached hose band to the
end of hose, set the tightening
position upward, and then tighten it.
Indoor unit body
Drain pipe
connecting port
(Transparent)
Flexible hose
(Accessory)
VP25 vinyl chloride pipe
(To be local procure)
Pipe material
Insulator
Hard vinyl chloride pipe socket for VP25
Hard vinyl chloride pipe VP25
(Outer diameter Ø32 mm)
Foamed polyethylene foam, thickness:
10 mm or more
Summary of Contents for MMU-AP0071MH
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