Drain Piping - Toshiba RAV-HM401CTP-E Installation Manual

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.
• Provide the indoor drain piping with proper heat insulation.
• Provide the area where the pipe connects to the indoor unit with proper heat insulation. Improper heat insulation
will cause condensation to form.
• The drain pipe 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. Doing so may cause abnormal sounds.
• Restrict the length of the traversing drain pipe to 20 meters or less. For a long pipe, provide support brackets at
intervals of 1.5 to 2 meters to prevent flapping.
• Install the collective piping as shown in the following figure.
• Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
• Do not allow any force to be applied to the connection area with the drain pipe.
• A hard PVC pipe cannot be connected to the drain pipe connecting port of the indoor unit. Be absolutely sure to
use the flexible hose provided for the connections with the drain pipe connecting port.
• Adhesive agents cannot be used for the drain pipe connecting port (hard socket) of the indoor unit. Be absolutely
sure to secure the pipe using the hose bands provided. Use of an adhesive agent may damage the drain pipe
connecting port or cause water to leak.
1.5 m to 2 m
Support
bracket
(Collective
piping)
Heat
Downward slope
insulator
1/100 or more
Drain pipe
connecting port
Attached drain hose
(hard socket) Attached
hose band
Attached hose band
Soft Soft
VP 20 Polyvinyl
Adhesive
socket socket
chloride pipe
agent
(locally procured)
prohibited
■
Pipe material, size and insulator
The following materials for piping work and insulating process are procured locally.
Pipe material Hard vinyl chloride pipe VP20 (Nominal outer diameter Ø26 mm)
Insulator Foamed polyethylene foam, thickness: 10 mm or more
As long as possible
(Approx. 10 cm)
Arched shape
Trap
Downward slope
1/100 or more
Incorrect
VP30
■
Connection of drain hose
• Insert the attached drain hose into the drain pipe connecting port on the drain pan up to the end.
• Fit the attached hose band to the end of the pipe connecting port, and then tighten it securely.
REQUIREMENT
• Fix the drain hose with the attached hose band, and set the
tightening position upward.
• As the draining is the natural water draining, arrange the pipe
outside of the unit on the down slope.
• If piping is performed as shown in the figure, drain cannot be
discharged.
Fit the attached hose band to the end of the
hose, lay down the knob, and then tighten hose
band.
Drain pan
10 to 15 mm
Confirm that soft hose is pushed in up to the end of the drain pan.
■
Connecting drain pipe
Connect the hard vinyl chloride pipe (locally procured) to the mounted drain hose which
was attached.
In case of taking pipe from the left side
In case of taking pipe from the left side, exchange the plug from left to right. Push in the
plug of which end is not sharp up to the end.
■
Drain up
When a down-gradient cannot be secured for the drain pipe, drain-up piping is possible.
• The height of the drain pipe must be 600 mm or less from the underside of the indoor unit.
• When Drain Pump Kit (sold separately) is installed, drain pipe and refrigerant pipe can only be connected from
upper direction.
– 12 –
NO GOOD
Drain pipe
Fit the attached hose band to the end
of the hose, with both of the two knobs
oriented sideways.
10 to 15 mm
Attached drain hose
Drain pipe
Refrigerant pipe
Drain pipe
Drain pan
Plug