Drain Piping - Toshiba MMD-AP0056SPH1-E Installation Manual

5

Drain piping

CAUTION
Following the Installation Manual, perform the drain
piping work so that water is properly drained, and
apply a heat insulation so as not to cause a dew
drop.
Inappropriate piping work may result in water
leakage in the room and wet of furniture.
 Piping / Heat insulating material
Require the following materials for piping and heat
insulating at site.
Hard vinyl chloride pipe VP25
Piping
(Outer dia.: Ø32 mm)
Foam polyethylene:
Heat insulator
Thickness 10 mm or more
 Flexible hose
Use the attached flexible hose to adjust centre
discrepancy of the hard vinyl chloride pipe or to adjust
the angle.
• Do not use the flexible hose as stretched, or do not
deform it more extent than that in the following figure.
• Fix the soft end of the flexible hose with the attached
hose band.
• Use the flexible hose on a horizontal level.
OK
NO GOOD
Top view
Side view
Air discharge
max
45°
Side view Side view
Air discharge Air discharge
max
45°
21-EN
REQUIREMENT
• Perform heat insulation of the drain pipes of the indoor
unit.
• Perform heat insulation of the connecting part with the
indoor unit.
An incomplete heat insulation causes dew drop.
• Set the drain pipe with downward slope (1/100 or
more), and do not make swelling or trap on the piping.
It may cause an abnormal sound.
• For length of the traversing drain pipe, restrict to 20 m
or less.
To use a long pipe, provide support brackets with
interval of 1.5 - 2 m in order to prevent waving.
1.5 - 2 m
1/100 or more
Heat insulator
downward
Arched
shape
Trap
• Set the collective piping as shown in the below figure.
As long as possible (100 mm)
VP25
VP25
VP30 or more
• Do not apply force to the connecting part of the drain
Riser (Trap)
pipe.
• The hard vinyl-chloride pipe cannot be directly
connected to the drain pipe connecting port of the
indoor unit.
90° Bend
For connection with the drain pipe connecting port, fix
the attached flexible hose with the hose band,
otherwise a damage or water leak is caused on the
drain pipe connecting port.
– 11 –
Drain pipe
connecting
port
Soft socket
Adhesive agent
prohibited
• Adhesive agent cannot be used for the pipe
connecting port (hard socket) of the indoor unit.
Be sure to use the attached hose band for fixing,
otherwise damage or water leakage of the drain pipe
connecting port is caused.
Support
15 mm or less
bracket
Indoor unit
NO
GOOD
Hose band
VP25
 Connecting drain pipe
• Connect a hard socket (locally procured) to the hard
Downward slope
socket of the attached supplied flexible hose.
1/100 or more
• Connect a drain pipe (locally procured) to the
connected hard socket.
REQUIREMENT
• Connect hard vinyl chloride pipes securely using an
adhesive for vinyl chloride to avoid water leakage.
• It takes some time until the adhesive is dried and
hardened (refer to the manual of the adhesive). Do not
apply stress to the joint with the drain pipe during this
time period.
 Drain up
Align the attached
hose band to the end VP25 vinyl chloride
of hose, set the
pipe
When a down-gradient cannot be secured for the
tightening position
(Locally procured)
drainpipe, drain-up piping is possible.
upward, and then
tighten it.
• The height of the drain pipe must be 850 mm or less
from the bottom of the ceiling.
• Take the drain pipe out of the drain pipe joint with the
Hard socket
Socket for VP25 indoor unit in 300 mm or less, and bend up the pipe
(Locally procured)
vertically.
• Immediately after the pipe is bent up vertically, lay
the pipe making a down-gradient.
• Set downward grading immediately after raising up
vertically.
Flexible
drain hose
10 mm
Indoor unit
 Check the draining
In the test run, check that water drain is properly
performed and water does not leak from the connecting
part of the pipes.
Check draining also when installed in heating period.
By using a pitcher or hose, pour water (1500 - 2000 cc)
into the discharge port before installation of the ceiling
panel.
Pour water gradually so that water does not spread on
the motor of the drain pump.
CAUTION
Pour water gently so that it does not spread around
inside the indoor unit, which may cause a malfunction.
300 mm or less
Underside of ceiling
22-EN