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English
14
<PRECAUTIONS FOR DRAIN RAISING PIPING>
•
Install the drain raising pipes at a height of less than 675mm. 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 recommended.
•
Install the drain raising pipes at a right angle to the indoor unit and no more than 300mm from the unit.
Drain hose (1)
(accessory)
Level
or tilted
slightly
up
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.
Metal clamp
(accessroy) (2)
Drain hose (accessory) (1)
Raising section
Drain raising pipe
Ceiling slab
Supporting hanger
Adjustable
(≥ 675mm)
≥ 300mm
1 – 1.5m
175mm
850mm
Fig. 20
• 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.
Converging drain pipes
Keep the drain pipe sloping downward
at a gradient of at least 1/100 to prevent
air pockets from forming.
Water pooling in the drainage pipe can
cause the drain to clog.
Fig. 21
0 – 675mm
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.
WHEN ELECTRIC WIRING WORK IS FINISHED
• Add approximately 1 L of water slowly from the air outlet and check drainage flow.
Check drainage flow during COOL running, explained under ‘‘11. TEST OPERATION’’.
• After checking the drainage of water, refer to Fig. 25 and attach the sealing pad (14) to perform the
thermal insulation of the drain socket.
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 the single phase power supply (SINGLE PHASE 60Hz 230V) to
connections No.1 and No.2 on the terminal block for wiring the units. Do not connect to No.3 of the
terminal block for wiring the units. (The drain pump will not operate.) Connect the ground wire firmly.
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.
•
Put approximately 1L of water slowly into the drain pan through the outlet on the left side of the drain
socket. Make sure not to pour water over the drain pump or any electric parts including those of the drain
pump.
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