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Preparations for Wiring
Power Supply Wiring
• Power supply voltage : AC24 V 60 Hz 1-PH
• Voltage fl uctuation : ±10 % or less
• Electric power consumption : 20 W
• Be sure to use a dedicated line for power source.
Type of wiring
• Use a fl exible wiring of AWG #17 - AWG #14
Total Wire Length
• 99 ft. (30 m) or less
Inter-Unit Control Wiring
Type of wiring
• Use a fl exible wiring of AWG #20 - AWG #14
• No polarity
Total Wire Length : 3280 ft. (1000 m) or less
Number of connectable units and devices :
(→ P.1 "Specifi cations")
Attention
• When using the unit at a location susceptible to electrical
noise, use a fl exible shield wiring (one side grounding).
Wiring
Basic Wiring Diagram
Power source
(AC 120 V 60 Hz)
N
L
Power trans
*3
(AC 24 V 60 Hz)
[fi eld supplied item]
Power supply wiring
Outdoor unit
Communication
Adaptor
U1 U2
+
–
U1 U2
Indoor unit
*3: The AC 24 V power from an energy limited Class II
power source must be provided to the equipment.
1. Turn the circuit breaker off before connecting the wiring
2. How to Attach the Ring Pressure Terminal
For power supply wiring
Process the end of each wiring, and
attach the ring pressure terminal (fi eld
supplied item).
For shield wiring
Process the end of the each wiring and attach the ring
pressure terminal (fi eld supplied item).
Remove wiring coat.
Cover with the tape.
Attach ring pressure
terminal.
Outdoor
unit
This unit
U1 U2
L
U1
+
N
U2
–
Inter-unit control
wiring
• No polarity
Communication
Adaptor
control wiring
• Polarity
U1 U2
U1 U2
present
Indoor unit
Indoor unit
1-1
Strip
Shield mesh
Strip
Insulation tape
Shield mesh
Ring pressure
terminal
Communication Adaptor Control Wiring
(When connecting a Communication Adaptor)
Polarity (+/-) present
Number of connectable Communication Adaptor
• up to 7 units
For the type of wiring and total wiring length,
see "Installation Instructions" supplied with the
Communication Adaptor.
External I/O Wiring
(When connecting external equipment)
Type of wiring
• Use a fl exible wiring of AWG #20 - AWG #14
Wire Length : 66 ft. (20 m) or less
Attention
• When using the unit at a location susceptible to electrical
noise, use a fl exible shield wiring (one side grounding).
LAN Cable
Type of wiring
• Category 5 or above straight cable
Wire Length : 328 ft. (100 m) or less
3. Remove the
power switch
cover
4. Wiring
Connect the power supply wiring.
• Do not over-tighten. (The screw may be damaged.)
Connect the inter-unit control wiring.
When using the shield wiring, connect the shield part
of the shield wiring to No. 0 (FG
board (TB2).
*4: Functional Ground
• Do not over-tighten. (The screw may be damaged.)
There is no polarity.
Connect the Communication Adaptor control wiring.
Make sure the polarities (+/-) are correct.
1-2
Attention
• Read the "Installation Instructions" supplied with the
Communication Adaptor.
Connecting external equipment.
Attention
• See "Connecting to External Equipment" (P.4).
Fix the power supply wiring and other communication
wirings with the clamper (supplied) securely.
Ring
(Do not apply tensile force on the terminal connection part.)
pressure
Connect the LAN cable.
terminal
After all wiring arrangements are complete, turn
the circuit breaker on.
• Before power on, measure the voltage of the power supply
terminal board, and check it for the specifi ed voltage.
Turning the power on with a voltage other than the
specifi ed one may blow the fuse. If this occurs, no power
is supplied, and this unit may need to be replaced.
3
(When connecting to a network)
Power switch cover
Power-in port
Screw
*4
) of the signal terminal
Screw
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