Toshiba MM-U056 Installationsanleitung Seite 23

Precautions
Ensure that the drain piping indoors is correctly
heat-insulated otherwise condensation will result.
!
Also, insulate the section which connects it to the
indoor unit.
If nylon cable ties are used to secure the insulation,
do not over-tighten them causing the deformation
!
of the heat insulation because this will reduce the
effectiveness of the insulation.
Use hard PVC adhesive for joining the pipes to
!
ensure that there will be no leakage.
Take care not to apply any force or pressure at the
!
unit side where the drain piping exits the indoor
unit.
The drain piping must be placed on a downward
gradient (1/100 or greater) and there should be no
!
upward or downward curves in the pipe which
obstruct the drainage, unless a drain pump is
employed.
The drain pipe should not extend for more than
20m horizontally. If the pipe has to be extended
!
horizontally for a considerable distance it must be
sufficiently supported to prevent warpage, also
increasing the gradient is recommended.
When one drainage system is used for a multiple
!
number of indoor units, install the piping as shown
below:
15-20m
Support clamp
Insulator
Downward gradient
1/100 or greater
Make this distance as long as possible – approx 10cm
Downward gradient
1/100 or greater
Piping Material and Heat Insulator
Hard PVC pipe**
Heat Insulator*
Drain pan Drain hose
*
Heat Insulator:
Polyethylene foam (thickness 6mm)
**
Piping Material:
Hard PVC pipe nominal diameter inside Ø20mm
D P
RAIN
✗
Upward
curve
Downward
curve
Hard PVC adhesive
~ 23 ~
IPING
Fixing the Drain Pan
MM-C, MM-CR Rear Attachment
MM-S, MM-SR Bottom Attachment
G
Screw the drain pipe fixing plate to the lower part of the
rear/bottom knockout and attach the drain pipe with
the nylon band. The knot in the nylon band should be
on the inner side (above the drain pipe fixing plate).
When the drain pipe alone is attached to the
rear/bottom, use the drain pipe knockout only.
Cut the slit
portion with a
saw
Rear/Bottom knockout
Nylon band
(supplied)
Drain Pipe
Rear knockout for drain
pipe
MM-C, MM-CR
Right or Left attachment of Drain Hose
G
For attachment on the left, open up the knockout.
Attach the drain hose from right to left and the plug
from left to right. The plug is not tapered and should
be fully inserted. After attaching the pipe, seal the
remaining gap in the knockout with the heat insulating
material supplied (cut to an appropriate shape).
MM-U
G
Connection to the unit is via a 1'' BSP male connection
– to ensure a waterproof seal, PTFE thread tape must
be used. The maximum lift of the condensate pump
from the drain outlet is 360mm and the maximum
overall lift from the underside of the ceiling to the
centre of the drain piping is 600mm. These values
must not be exceeded otherwise unit flooding will
occur when the drain pump is switched off.
100mm
(max)
Cassette
Refrigeration
pipes
Drain pipe
fixing plate
(supplied)
Screw
(Use the screw
from shipping
fixture)
Drain Pipe
Ceiling
GB