Toshiba R410A - Manual (Page 58)

58
5
DRAIN PIPING WORK
Piping material
• For laying pipes underground, use hard vinyl
chloride pipe. VP25 (Inner diamater Ø32mm)
Piping and cautions
• Set drain side of pipe at downward slope.
(1/100 or more)
• Be sure to apply thermal insulation (foaming
polyethylene, 10mm-thickness or more) for pipes
passing through the room.
• Adhere the connecting sections with vinyl chloride
agent surely so that no water leakage is caused.
• Apply adhesive agent without unevenness around
the portion approx. 40mm from the end of hard
polyvinyl-chloride pipe.
• Push the vinyl pipe in the drain socket completely
up to the end of the socket.
• Do not apply strength to the connecting part until
the adhesive agent has dried and hardened.
• Support the piping with hanging bracket so that the
force is not applied to connection sections of pipe
and pipe is not waved.
NOTES :
• Do not make slack or trap at halfway across piping.
• Set pipes so that the end of drain pipe is not dipped in
water, and also keep space 50mm or more to the
ground.
• After piping work, check if water drains smoothly.
• Hole should be made at a slight downward slant to
the outdoor side.
• When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.
Thermal-insulating process
• After checking water drain, be sure to apply the
thermal-insulating for connecting portion of the
pipes.
• Apply taping so that there is no clearance on the
fitting part of thermal-insulator of the main unit with
the insulator procured locally.
Trap
Arched shape
Support
bracket
1/100 or more
downward slope Thermal
insulator
Indoor
unit
1.5m to 2m
50 mm
or more
Do not put the drain hose
end into water or drainage.
• As shown in the figure, set the collective piping such
as the ceiling duct so that waste water does not back
up from the main pipe.
Fit insulator so that
there is no clearance.
Hard polyethylene vinyl pipe
(Procured locally)
Thermal insulator
(Procured locally)
Fix thermal insulator
by taping
Thermal insulator
(Main unit side)