Drain Piping - Toshiba RAV-RM561FT-EN Instrucciones De Montaje

5

Drain piping

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.
• After opening the knockout hole, deburr the edge.
Touching burrs adhered to opening of the knockout hole may cause an injury.
• Following the Installation Manual, perform the drain hose work. Inappropriate drain hose work may result in
generation of slime in the drain hose and water leakage in the room.
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.
• If clearance occurs between piping/wiring and drain hose in opening the knockout hole, apply putty to the clearance.
• 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, remove the air intake grille and pour water in the drain pan to check water
drain and that there is no water leakage from connecting part of the drain hose.
• After check of the water drain, attach the air intake grille as before.
• If the pipe passes through a fire retarding division, apply incombustible material (putty) to the clearance at penetration
part.
 Pipe material, size and heat insulator
The following materials for piping work and insulating process are procured locally.
Pipe material Hard vinyl chloride pipe (PVC pipe) VP20 (Internal diameter : 20 mm, external diameter : 26 mm)
Heat insulator Foamed polyethylene foam, thickness: 6 mm or more
117-EN
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 Connecting drain pipe
Drain pan
REQUIREMENT
• Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.
• It requires several hours 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.
Piping method
Drain and refrigerant pipes can be drew out from left, right, back or bottom depending on the installation location.
However, drain pipes can be drew out from left only when the refrigerant pipes are drew out from left. The drain
hose must be fix to the refrigerant pipe with binding band and installed with gradient of 1/100 or more. The drain
hose end connected to the indoor unit must be free from external force.
• Do not route the drain hose and refrigerant pipes over the electrical control box. Condensed water from the pipes
may enter the electrical control box and cause malfunction. Exclude RM56 to RM80 models.
• On the RM56 to RM80 models, the drain hose and refrigerant pipes coming out of the electrical control box must
be 5 mm apart. If the clearance is less than 5 mm, it will be hard to remove the drip-proof cover and the electrical
control box cannot be taken out.
Piping port at bottom
Heat insulator
Hard polyvinyl chloride pipe
Drain hose Adhesion for hard polyvinyl
chloride pipe used
Refrigerant pipe connecting
port (both sides)
Wiring port
(both sides)
Drain hose connecting port
(both sides)
*RM110 to RM160 only
To connect drain hose on
right or left , route it through
the knock-out for refrigerant
Piping port at
piping on RM56 to RM80
back
model.
118-EN