8
3P086154-3R
English
CAUTION
•
Drain piping connections
Do not connect the drain piping directly to sewage pipes
that smell of ammonia. The ammonia in the sewage 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.
8. ELECTRIC WIRING WORK
8-1 GENERAL INSTRUCTIONS
•
Make sure that all electric wiring work is carried out by
qualified personnel according to the applicable legislation
and this installation manual, using a separate dedicated
circuit.
Insufficient capacity of the power supply circuit or improper
electrical construction may lead to electric shocks or a fire.
•
This equipment can be installed with a Ground-Fault Circuit
Interrupter (GFCI). Although this is a recognized measure
for additional protection, with the grounding system in North
America, a dedicated GFCI is not necessary.
•
Do not turn on the power supply (branch switch, branch
overcurrent circuit breaker) until all the works are finished.
•
Multiple number of indoor units are connected to one out-
door unit. Name each indoor unit as A-unit, B-unit ….. and
the like. When these indoor units are wired to the outdoor
unit and the Branch Selector unit, always wiring the indoor
unit to the terminal indicated with the same symbol on the
terminal block. If the wiring and the piping are connected
to the incorrect indoor units and operated, it will result in
malfunction.
•
Make sure to ground the air conditioner.
Grounding resistance should be according to applicable
legislation.
•
Do not connect the ground wiring to gas or water pipings,
lightning conductor or telephone ground wiring.
•
Gas piping .................
Ignition or explosion may occur if
the gas leaks.
•
Water piping ..............Hard vinyl tubes are not effective
ground.
•
Lightning conductor or telephone ground wiring ..............
Electric potential may rise abnormally if struck by a light-
ning bolt.
•
For electric wiring work, refer to also the WIRING DIA-
GRAM attached to the control box cover.
•
Carry out wiring between the outdoor units, indoor units
and the remote controllers according to the wiring diagram.
•
Carry out installation and wiring of the remote controller
according to the installation manual attached to the remote
controller.
•
Do not touch the Printed Circuit Board assembly. It may
cause malfunction.
8-2 ELECTRICAL CHARACTERISTICS
Units
Power
supply
Fan motor
Model
Hz Volts Voltage
range
MCA MOP
W
FLA
FXLQ07 · 09MVJU,
FXNQ07 · 09MVJU
60
208-
230
Max. 253
Min. 187
0.3
15
15
0.2
FXLQ12MVJU,
FXNQ12MVJU
0.5
15
25
0.4
FXLQ18 · 24MVJU,
FXNQ18 · 24MVJU
0.6
15
35
0.5
MCA: Min. Circuit Amps (A); MOP: Max. Overcurrent Protective Device (A)
W: Fan Motor Rated Output (W); FLA: Full Load Amps (A)
8-3 SPECIFICATION FOR FIELD SUPPLY FUSES
AND WIRING
Power supply wiring
Remote controller wiring
Transmission wiring
MOP
Size
Wiring
Size
15A
Wiring size and
length must
comply with local
codes.
2-conductor,
stranded non-
shielded copper
cable PVC/vinyl
jacket (NOTE 2)
AWG
18-16
The lengths of remote controller wiring and transmission wir-
ings are as follows:
(1) Remote controller wiring (indoor unit - remote controller)
........................................................
Max. 1,640 ft. (500 m)
(2)
Transmission wirings
................................ Total wiring length 6,560 ft. (2,000 m)
•
Outdoor unit - Indoor unit
.................................................
Max. 3,280 ft. (1,000 m)
•
Outdoor unit - Branch Selector unit
.................................................
Max. 3,280 ft. (1,000 m)
•
Branch Selector unit - Indoor unit
.................................................
Max. 3,280 ft. (1,000 m)
•
Indoor unit - Indoor unit
.................................................
Max. 3,280 ft. (1,000 m)
NOTE
1.
Shows only in case of protected piping. Use H07RN-F in
case of no protection.
2.
Vinyl cord with sheath or cable (Insulated thickness :
1/16 in. (1 mm) or more).
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