8
• Gas pipes : might cause explosions or fire if gas leaks.
• Water pipes : no grounding effect if hard vinyl piping is
used.
• Telephone ground wires or lightning rods : might cause
abnormally high electric potential in the ground during
lighting storms.
8-2
ELECTRICAL CHARACTERISTICS
MCA: Min. Circuit Amps (A); MFA: Max. Fuse Amps (A)
kW: Fan Motor Rated Output (W); FLA: Full Load Amps (A)
8-3
SPECIFICATIONS FOR FIELD SUPPLIED
FUSES AND WIRE
NOTE
1.
Allowable length of transmission wiring between indoor/
outdoor units and between the indoor unit and the remote
controller is as follows.
(1) Outdoor unit – Indoor unit:
Max. 3280ft. (Total wiring length: 6560ft.)
(2) Indoor unit – Remote controller:
Max. 1640ft.
9. WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER
9-1
HOW TO CONNECT WIRINGS
(Remove the electric parts box lid and wire as shown in the fig-
ure below.)
CAUTION
• Be sure to attach the sealing material or putty (field supplied)
to hole of wiring to prevent the infiltration of water as well as
any insects and other small creatures from outside. Other-
wise a short-circuit may occur inside the electric parts box.
• When clamping the wires, be sure no pressure is applied to
the wire connections by using the included clamping material
to make appropriate clamps. Also, when wiring, make sure
the lid on the electric parts box fits snugly by arranging the
wires neatly and attaching the electric parts box lid firmly.
When attaching the electric parts box lid, make sure no wires
get caught in the edges. Pass wiring through the wiring
through holes to prevent damage to them.
• Make sure the remote controller wiring, the wiring between
the units, and other electrical wiring do not pass through the
same locations outside of the unit, separating them by at
least 1 15/16”, otherwise electrical noise (external static)
could cause mistaken operation or breakage.
NOTE
1.
Use round crimp-style terminals for connecting wires to the
power supply terminal block.
If unavailable, observe the following points when wiring.
• Do not connect wires of different gauge to the same
power supply terminal.
(Looseness in the connection may cause overheating.)
• Use the specified electric wire. Connect the wire securely
to the terminal. Lock the wire down without applying
excessive force to the terminal. (Tightening torque:
0.97ft.lbf ±10 %)
2. Tightening torque for the terminal screws.
• Use the correct screwdriver for tightening the terminal
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not be
properly tightened.
• If the terminal screws are tightened too hard, screws
might be damaged.
Units
Power supply
Fan motor
Model
Hz Volts
Voltage
range
MCA MFA
W
FLA
FXMQ30MVJU
60
208-
230
Max. 253
Min. 187
1.6
15
160
1.3
FXMQ36MVJU
2.9
15
270
2.4
FXMQ48MVJU
4.4
15
430
3.5
Model
Power supply wiring
Remote controller wiring
Transmission wiring
Field fuses
Size
Wire
Size
FXMQ30MVJU
15A
Wire size
must comply
with local
codes.
Sheathed
wire
(2 wire)
AWG
18-16
FXMQ36MVJU
FXMQ48MVJU
