Drain Piping - Toshiba MML-UP0071BH-E Installation Manual

5

Drain piping

CAUTION CAUTION
Following the Installation Manual, perform the drain piping work so that water is properly drained. Apply a heat
insulation so as not to cause a dew condensation.
Inappropriate piping work may result in water leakage in the room and wet furniture.
NOTE
• The drain pipe and drain hose must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up
and down (arched shape) or allow it to form traps.
• Be sure to connect the drain hose and drain pipe at the outside of unit and fix them.
• Restrict the length of the traversing drain pipe to 20 meters or less. For long pipe, provide support brackets at intervals
of 1.5 to 2 meters to prevent flapping. Do not provide any air vents. Otherwise, the drain water will spout, causing
water to leak.
• For collective piping, the pipes must be equivalent to VP30 and sloping downward at an angle of 1/100 or more.
Provide the indoor drain piping and the refrigerant piping with proper heat insulation. (Foamed polyethylene foam,
thickness: 6 mm or more)
• After piping work has been completed, pour water in the drain pan to check water drain and that there is no water
leakage from connecting part of the drain hose.
 Installation of accessories
Install the drain pan (Accessory) on the pipe side of the indoor unit.
Drain pan screw
(Accessory)
Drain pan (Accessory)
19-EN
Cut the insulation, insert the protrusion on the drain pan into the hole, and then
install it by pushing it in the directions indicated by the arrows.
 Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Pipe material PVC pipe, pipe elbow (Nominal outer diameter 20 mm)
Insulator Foamed polyethylene foam, thickness: 10 mm or more
Drain pan (Accessory)
Heat insulated pipe (Accessory)
Drain hose (Accessory)
Use adhesive for PVC pipe
PVC pipe
Elbow
Insulation
 Connecting drain pipe
Insert the drain hose into the connector until the hose can go no farther.
REQUIREMENT
• Connect the hard vinyl chloride pipes certainly so that water does not leak by using adhesive agent for vinyl chloride.
• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.) Do not apply any
extra force on the connecting section until the adhesive agent dried.
CAUTION CAUTION
Sometimes, debris will accumulate in the drain pan while installation work is in progress. Remove the drain filter from
the drain pan and clean it.
After cleaning the drain filter, replace it in the drain pan.
 Check the draining
Pour water to the drain pan. Confirm that water drains well and does not leak from the drain hose connecting part.
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Drain filter
20-EN