Drain Piping - Toshiba RBM-Y1801F4PE Installation Manual

5

DRAIN PIPING

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 Flow Selector drain piping with proper heat insulation.
• Provide the area where the pipe connects to the 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 waving.
• Install the collective piping as shown in the following fi gure.
• 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 Flow Selector unit. Be absolutely
sure to use the fl exible 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 Flow Selector 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.
• When down-gradient cannot be secured for the drain pipe, drain-up kit (locally procured) is possible.
1.5 m to 2 m
Support
bracket
As long as possible
Heat
(Approx. 10cm)
insulator Downward slope
1/100 or more
Drain pipe
connecting port
Attached drain hose
(hard socket)
Attached
hose band
Attached drain hose
Soft
Soft VP 20 Polyvinyl
socket
socket chloride pipe
Adhesive 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
EN-13
CAUTION
VP30
Incorrect
Downward slope
1/100 or more
7
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 fi gure, drain cannot
be discharged.
Drain pan
Confi rm 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
Arched shape
which was attached. When Plug is detached, the drain pipe is not damaged. It causes
the water leak.
Trap 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.
Fit the attached hose band to the end of the Fit the attached hose band to the end
hose, lay down the knob, and then tighten of the hose, with both of the two knobs
hose band. oriented sideways.
10 to 15 mm 10 to 15 mm
Attached drain hose
Incorrect
Refrigerant pipe
Drain pipe
Drain pipe
Drain pan
Drain pipe
Plug
EN-14