12
English
<PRECAUTIONS FOR DRAIN RAISING PIPING>
• Install the drain raising pipes at a height of less than 545 mm.
The drain pump of this unit has a high delivery flow rate. Therefore, the higher the drain raising height is,
the lower the sound of draining will be. For this reason, a minimum drain raising height of 300mm is rec-
ommended.
• Install the drain raising pipes at a right angle to the indoor unit and no more than 300 mm from the unit.
NOTE
• To ensure no excessive pressure is applied to the included drain hose (1), do not bend or twist when install-
ing. (This may cause leakage.)
• If converging multiple drain pipes, install according to the procedure shown below.
Select converging drain pipes whose gauge is suitable for the operating capacity of the unit.
(2)
After piping work is finished, check if drainage flows smoothly.
• Add approximately 1000 cc of water slowly from the air outlet and check drainage flow.
CAUTION
• Drain piping connections
Do not connect the drain piping directly to sewage pipes that smell of ammonia. The ammonia in the sew-
age might enter the indoor unit through the drain pipes and corrode the heat exchanger.
• Keep in mind that it will become the cause of getting drain pipe blocked if water collects on drain pipe.
WHEN ELECTRIC WIRING WORK IS FINISHED
• Add approximately 1000cc of water slowly from the air outlet and check drainage flow.
• Check drainage flow during COOL running, explained under ‘‘12. TEST OPERATION’’.
WHEN ELECTRIC WIRING WORK IS NOT FINISHED
CAUTION
• Electrical wiring work should be done by a certified electrician.
• If someone who does not have the proper qualifications performs the work, perform the following after the
test run is complete.
• Remove the control box lid, connect a power supply (SINGLE PHASE 50Hz 220-240V or 60Hz 220V) to connections
L, N and ground wire on the power supply terminal block and remote controller to terminal block for remote controller.
When carrying out wiring work around the control box, make sure none of the connectors come undone. Be sure to
attach the control box lid before turning on the power.
Ceiling slab
300
1-1.5m
Hanger bracket
Adjustable
Drain hose (accessory)(1)
( 545)
750
205
Drain raising pipe
Raising section
Metal clamp (2)
Fig. 21
(accessory)
(mm)
Drain hose (1)
(accessory)
To prevent air bubbles in the
drain hose part, keep it level or
slightly tilted up. Any bubbles in
the hose might cause the unit
to make noise due to backflow
when the drain pump stops.
Level or
tilted
slightly up
Fig. 22
0 – 545mm
Water accumulating in the drain
piping can cause the drain to clog.
Central drain pipe
The drain pipe should have a downward
slope of at least 1/100 to prevent
air pockets from forming.
01_EN_3P184443-5S.fm Page 12 Friday, October 16, 2015 6:44 PM
