Drain Piping Work - Toshiba MMD-AP0181H Instruction Manual

5

DRAIN PIPING WORK

• Following the Installation Manual, perform the drain piping work so that water is properly drained, and apply a
heat insulating so as not to cause a dewing. Inappropriate piping work may result in water leakage in the room
and wet of furniture.
• The draining method is a natural draining. Therefore, slope the piping outside of the unit downward (at 1/50 to
1/100), and do not put an angle halfway. If doing so, an abnormal sound may be caused.
• To prevent overflow of drain pipe, set a drain trap on its way as shown in the right figure.
[The drain trap is required for preventing aspiration of smell through the drain pipe, and also for preventing
hardness of draining because the differential pressure between the drain pan and atmosphere becomes large
when the external static pressure is high (especially, at suction side).]
• Dust inside of the drain pipe is easy to be heaped at the drain trap. Be sure to set a plug so that the drain trap
can be cleaned.
• Maximum horizontal drain pipe length should be less than 20m or shorter.
If the pipe is long, set the support brackets with 1.5 to 2m interval to prevent waving.
• Mount the collective drain pipe as shown in the right figure.
• Do not mount an air purge pipe.
Otherwise drain water spouts out resulted in water leak.
• Do not apply strength to the connecting part with the
drain pipe.
• Do heat insulating securely to the indoor drain pipe.
• Be sure to do heat insulating to the connecting part
with the indoor unit.
Incomplete heat insulating may cause dewing.
Piping/Heat insulating material
The following materials as below for piping and heat
insulating prpcess are procured locally.
Check the draining
Check the water drainage is surely performed at the
trial operation.
Check also no water leakage is found at the pipe
connecting part.
REQUIREMENT
Enter water gradually using a kettle or a hose from
drain pan of the discharge port.
REQUIREMENT
Discharge port
Water entering
Drain pipe connecting port
CAUTION
Check panel
Plug
(Port for check
and cleaning)
Piping
Hard vinyl chloride pipe
VP25 (Outer dia. : Ø32mm)
Drain up
When not securing down slope on the drain pipe, use
a drain up kit sold separately. Also refer to the "Drain
up kit installation manual".
Check the draining
After drain piping work, check that water drain is
properly performed and water does not leak from the
connecting part of the pipes. In this time, check also
there is no abnormal sound of the motor of the drain
pump. Be sure to check draining when installed in the
heating period.
Pour water slowly.
If it is poured urgently, water is spread inside of the
indoor unit resulted in a trouble.
9
Drain pipe
Check panel
Collective
drain pipe
Plug
(Port for check
and cleaning)
Heat insulator
Vesicant polyethylene :
Thickness 10mm or more
CAUTION