Toshiba MMU-AP0071YH Drain Piping Work, Pipe material/Insulator and size, Drain up

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.

Pipe material/Insulator and size

The following materials for piping work and insulating process are procured locally.

Pipe material	Hard vinyl chloride pipe VP25
	(Outer diameter Ø32mm)
Insulator	Foamed polyethylene foam, thickness:
	10mm or more

REQUIREMENT

•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.

Heat

• Set the drain pipe with downward slope (1/100 or more), and do not insulator 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.		As long as possible (10cm)
•	Do not mount an air purge pipe,		VP25	VP25
	otherwise drain water spouts	(Collective pipes)
	out resulted in water leak.

1.5m to 2m	Support
	bracket

1/100 or more downward

Arched shape

Trap

VP25

VP30 or more	Downward slope
	1/100 or more

Connection of drain pipe

Connect hard vinyl chloride pipe to the drain piping port.

•Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.

•Apply adhesive agent around 40mm of the end of hard vinyl chloride pipe without unevenness, and then insert it surely until it strikes to the drain socket.

REQUIREMENT

•Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.

•It requires several times to dry and harden the adhesive agent.

(Refer to Guide Manual of the adhesive agent.) In this time, be sure not to apply force to the connecting section with the drain pipes.

Drain up

When a downward grading cannot be secured on the drain pipe, a drain-up work is possible.

•Set the height of the drain pipe within 350mm from the bottom surface of the ceiling.

•Draw out the drain pipe within 150mm from the end of the drain pipe connecting port of the indoor unit, and then raise it vertically.

•After the drain pipe has been raised, set a grading so that it is immediately bent downward.

Rising up 150mm or less	350mm or less
100mm	up
	Rising
or less
Indoor unit

Underneath of ceiling

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