Drain Piping Work - Toshiba Super MMU-AP0151SH Installation Manual

4

DRAIN PIPING WORK

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.
Inappropriate piping work may result in
water leakage in the room and wet of
furniture.
• Be sure to perform heat insulation of the drain pipes of the indoor unit.
• Never forget to perform heat insulation of the connecting part with the
indoor unit. An incomplete heat insulation causes dewing.
• 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 20m or less.
In case of a long pipe, provide support brackets with interval of
1.5 to 2m in order to prevent waving.
• Set the collective piping as shown in the right figure.
• Do not mount an air purge pipe,
otherwise drain water spouts
out resulted in water leak.
Drain up
• If a downward grading (1/100) cannot be secured on
the drain pipe, piping can be performed by rising-up
up to 340mm.
(500mm or less from the bottom surface of the
ceiling).
• Be sure to use the attached drain-up pipes when
performing the drain-up from drain port of the indoor
unit as required, and set the drain-up up to 500mm
or less from the bottom surface of ceiling. Never set
the drain-up below 500mm because it causes a
malfunction.
Extension
disabled
*1 Use vinyl chloride pipe in
up pipe at a position 500mm below the bottom
surface of the ceiling.
*2 Use the attached vinyl chloride pipe for traversing
piping. (Extension of pipe is disabled at site.)
• After rising up vertically, set the grading downward
immediately.
REQUIREMENT
(Collective pipes)
*
2 (140)
1
*
VP16
1
Below 500
VP25

when using the drain-
Pipe material/Insulator and size
The following materials for piping work and insulating
process are procured locally.
Hard vinyl chloride pipe VP25
Pipe material
(Outer diameter Ø32mm)
Foamed polyethylene foam, thickness:
Insulator
6mm or more
As long as possible (10cm)
VP25
VP25
VP30 or more
Heat insulating of pipe connecting part
• Be sure to apply heat insulating securely to the pipe
connecting part.
• Be sure to tape surely the butting part of the heat
insulator at the main unit side and at site so that no
clearance generates.
Hard vinyl
Butt heat insulator
chloride pipe
without clearance.
(Required at site)
Heat insulator
(Required at site)
10
1.5m to 2m
Support
bracket
Heat
1/100 or more
insulator
downward
Arched
shape
Trap
VP25
Downward slope
1/100 or more
Heat insulator
Using tape,
(Indoor unit side)
fix the heat insulator.