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9 English
CAUTION
• The drain piping will be clogged with water and water leakage
may result if the water is accumulated in the drain piping.
• Conduct drain-up piping work if the gradient is insuffi-
cient.
• Attach a support bracket at 3.3 to 4.9 ft (1 to 1.5 m)
intervals for the prevention of piping deflection.
• Be sure to use the drain hose (2) and metal clamp (1).
Insert the drain hose (2) deep into the base of the
drain socket, and securely fasten the metal clamp (1)
within the taped part on the insertion front end of the
hose.
Be sure to fasten the screw of the metal clamp (1) until
the margin of the screw thread decreases to 3/16 in.
(4 mm) or less.
NOTE
Be sure to follow the instructions as below.
• Do not connect the drain piping directly to a sewer that
smells of ammonia.
The ammonia in the sewer may reach through the drain
piping and corrode the heat exchanger of the indoor unit.
• Do not bend or twist the provided drain hose (2) in order
not to impose excessive force on the hose. (Doing so
may result in water leakage.)
• Take the procedure shown in the following illustration to
perform concentrated drain piping.
• Select the diameter of the concentrated drain piping to
suit the capacity of equipment connecting to the concen-
trated drain piping (see Engineering Data).
(2) Check that drainage flows smoothly on completion of the
installation of the piping.
[Before electrical work]
CAUTION
• A licensed electrical engineering technician must con-
duct electrical wiring work (including grounding work).
• If no licensed electrical engineering technician is avail-
able, take steps 3 and 4 after the test operation of the air
conditioner is finished.
1. Remove the control box cover, and connect the single-
phase electric wires to terminals L
1 and L2 of the ter-
minal block and the ground wiring to the ground ter-
minal.
Perform wiring according to 10-1. CONNECTING
POWER SUPPLY, GROUND, REMOTE CONTROLLER,
AND TRANSMISSION WIRING in 10. WIRING EXAM-
PLE AND HOW TO SET THE REMOTE CONTROLLER.
CAUTION
• In order not to impose tension on the wire connections, per-
form clamping securely with the provided clamp (8) specified
in 3 in 10-1. CONNECTING POWER SUPPLY, GROUND,
REMOTE CONTROLLER, AND TRANSMISSION WIRING.
2. Check that the control box cover is closed before turning
the air conditioner ON.
3. Provide approximately 1/4 gal (1 ) of water gradually
into the drain pan through the water inlet on the bottom of
the drain socket or the outlet. Make sure that the water is
not spilled onto the drain pump.
4. The drain pump will operate with the power turned ON.
Check that the pump drains water smoothly. (The drain
pump will stop automatically in 10 minutes.)
3.3 - 4.9 ft
(1 - 1.5 m)
Support bracket
Downward slope of at least 1/100
(accessory)
(accessory)
Metal clamp (1)
Tape
Drain hose (2)
Concentrated drain piping
The drain piping will be clogged with water
and water leakage may result if the water is
accumulated in the drain piping.
Maintain a downward slope of at least
1/100 so that no air bank will be formed.
18 - 3/8 in.
(467 mm)
Ceiling slab
3.3 - 4.9 ft
(1 - 1.5 m)
12 in. (300 mm)
max.
28 in. (700 mm)
max.
Support bracket
Drain-up piping
(field supply)
Adjustable
(18-3/8 in. (467 mm) max.)
Metal clamp (1) (accessory)
Drain hose (2) (accessory)
Drain hose (2) (accessory)
Horizontal or
upward slope
If there is an air bank, noise may be generated
as a result of a water backflow when the drain
pump comes to a stop.
Locate the drain hose horizontally
or with a little upward gradient.
01_EN_3P530815-1.fm Page 9 Tuesday, July 10, 2018 6:20 PM
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