English
9
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.
• The Socket for maintenance can be used for natural
drainage as shown below. As the drain pump operation
does not need for natural drainage, it can be disable by
field setting to reduce power consumption.
(Refer to Table 6)
• Select the diameter of the concentrated drain piping to
suit the capacity of equipment connecting to the concen-
trated drain piping.
(2) Check the smooth draining of the piping 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 L1 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
.
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)
3-15/16 in.
(100 mm)
or more
Seal and insulate
the drain socket.
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_3PN14093-18K.fm Page 9 Monday, January 5, 2015 2:52 PM
