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The following materials for piping work and insulation are to be procured locally.
5 DRAIN PIPING WORK
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
Pipe material
Hard vinyl chloride pipe socket for VP25
Hard vinyl chloride pipe VP25 (Outer diameter 32 mm (diam.))
Insulator
Foamed polyethylene foam, thickness: 10 mm or more
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.
1.5 m to 2 m
Heat insulator
1/100 or more
downward
Support
bracket
Trap
Arched
shape
NO
GOOD
As long as possible (10 cm)
(Collective pipes)
VP30 or more
Downward slope
1/100 or more
Drain pipe connecting port
(Hard socket)
Adhesive agent prohibited
VP25 vinyl
chloride pipe
(Procured locally)
Attached hose band
Attached hose band
Soft socket
Hard socket
Socket for VP25
(Procured locally)
