– 12 –
Screw
Hanging bracket
Bolts for fastening the hanging
bracket (Loosen these bolts.)
Use bolts to fasten the
hanging bracket.
Indoor Unit
7 to 12 mm
Adjust the length of the bolts for
fastening the hanging bracket.
Front
(Unit : mm)
N
(inside dimension)
Ceiling surface
◆
Attaching the hanging bracket
fi
rst
Hanging bolt
(locally procured) Hanging bracket
fi
xing board
Bolts for fastening the hanging bracket
(Fasten the bolts tight.)
Model
N
GM90
1501 to 1506
1
Remove the screws fastening hanging
bracket
onto the indoor unit.
2
Loosen the bolts fastening hanging bracket
onto the indoor unit and remove the hanging
bracket.
3
Adjust the length of the two bolts for fastening
the hanging bracket, as shown below.
4
Fasten the hanging bracket with the hanging
bolts and ensure that the bracket is level from
front to back and from side to side.
5
Attach the indoor unit onto the hanging
bracket and fasten it tight with the bolts and
screws.
Double nut
(locally procured)
Washer
(Accessory)
CAUTION
• The ceiling is not always level. Use the level gauge
to measure the level of the ceiling in the width and
depth directions. Adjust the bolts for the hanging
brackets so that the level error will be within 5 mm.
• Do not lower the air discharge side and the side
opposite to the selected drain pipe withdraw.
Arched shape
Incorrect
Trap
1.5 m to 2 m
Support
bracket
Heat
insulator Downward slope
1/100 or more
As long as possible
(Approx. 10 cm)
(Collective
piping)
Downward slope
1/100 or more
VP30
Drain pan
Adhesive
agent
prohibited
Soft
socket
Attached drain hose
Attached hose band
Soft
socket
VP 20 Polyvinyl
chloride pipe
(locally procured)
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
fl
apping.
• 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 indoor 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 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.
Drain pipe
connecting port
(hard socket)
■
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
Attached
hose band
23-EN
24-EN
