– 59 –
Installing the indoor unit
Attaching the duct connector
Attach 4 duct connectors to the unit using the six screws supplied for each connector.
Attaching the washers and nuts
1
Procure the hanging bolts, nuts, and washers locally.
2
Attach the washers and nuts to the hanging bolt (M12) as shown in the figure on the right.
Fixing the unit
1
Fit the hanging bracket on the hanging bolt, then adjust the position of the unit so that it is level.
2
Tighten the bolts securely using a double nut to prevent the bolts from becoming loose.
• If the bolts are not tightened securely, the unit will vibrate and an accident may occur.
• Tighten the bolts so that they can bear the weight of the unit.
3
Confirm that the unit is installed level.
• Confirm that the unit is installed level or is inclined within 1 °(downward) against the drain outlet using a spirit
level.
• Do not set the unit inclined (upward) against the drain outlet; otherwise, water will leak from the unit.
CAUTION
To preventing vibration, use vibration proof hanging brackets (locally procured).
Duct connector
Screws
Hanging bolt
(M12)
Nut
Washer
Nut
Within 1°
Within 1°
Hanging bolt (Ø12)
Nut
Washer
Washer
Nut
Hanging bracket
Vibration-
proof hanging
bracket
Hanging bolt (Ø12)
Vibration-proof hanging
bracket
6
Drain piping work
CAUTION
Install drain pipes to drain water securely referring
to the Installation Manual. In addition, insulate the
pipes from heat to prevent condensation.
(Inappropriate piping results in water leaking into the
room and furniture may be damaged.)
REQUIREMENT
• Install drain pipes to prevent water from leaking.
• Set the drain pipe with downward slope (1/100 or
more), and do not make swelling or trap on the piping.
It may cause an abnormal sound.
• For length of the traversing drain pipe, restrict to 20 m
or less.
In case of a long pipe, provide support brackets with
interval of 1.5 - 2 m in order to prevent waving.
• Set the collective piping as shown in the below figure.
• Do not apply force to the connecting part of the drain
pipe.
• Perform heat insulation of the drain pipes of the indoor
unit.
• Perform heat insulation of the connecting part with the
indoor unit.
An incomplete heat insulation causes dew dropping.
• If the installation place is subject to freezing, perform
anti-freezing work.
Piping / heat insulating
material
Procure the following materials for piping and heat
insulating locally.
Connecting drain pipe
• Connect the elbow for vinyl chloride pipe VP25
downward to the drain outlet.
• Position the tip of the drain pipe so that water can be
drained, and open the other end.
NOTE
• Connect hard vinyl chloride pipes securely using an
adhesive for vinyl chloride to avoid water leakage.
• It takes some time until the adhesive is dried and
hardened (refer to the manual of the adhesive). Do not
apply stress to the joint with the drain pipe during this
time period.
Drain-up
For the installation instruction of a drain-pump kit (sold
separately), refer to the Installation Manual supplied
with the drain-pump kit.
Check the draining
In the test run, check that water drain is properly
performed and water does not leak from the connecting
part of the pipes.
REQUIREMENT
• Check draining also when installed in heating period.
• Using a pitcher or hose, pour water (1500 - 2000 cc)
into the discharge port before installation of the
maintenance cover.
Piping
Hard vinyl chloride pipe VP25 (Outer
dia. : Ø32 mm)
Elbow for VP25
Heat insulator
Foam polyethylene:
Thickness 10 mm or more
maintenance cover
Elbow for VP25
Hard vinyl chloride
pipe VP25
117-EN
118-EN
+00EH99887601-2_01EN.book Page 59 Thursday, September 15, 2016 5:23 PM
