Electrical Requirement; Unit Wiring; Connection Diagrams - Fujitsu R410A Installation Manual

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Electrical requirement

Be sure to install a breaker of the specified capacity.
Regulation of cables and breaker differs from each locality, refer in accordance with
local rules.
Voltage rating
Operating range
Cable Cable size
Power supply cable
Connection cable
1) Selected sample: Select the correct cable type and size according to the country or
region's regulations.
Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the
wire diameter when the wire length is long.
Breaker
Circuit breaker (MOCP) * 4)
Earth leakage breaker
2) Select the appropriate breaker of the described specification according to the national
or regional standards.
3) Select the breaker that enough load current can pass through it.
4) MOCP: Maximum Over Current Protection
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Unit wiring

• When stripping off the coating of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the coating with a knife etc.
Earth wire
How to connect wiring to the terminal
Caution when wiring cable
(1) Use crimp-type terminals with insulating sleeves as shown in the figure to connect
to the terminal block.
(2) Securely clamp the crimp-type terminals to the wires using an appropriate tool so
that the wires do not come loose.
(3) Use the specified wires, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a
screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.
Strip : 10 mm (25/64 in.)
Screw with special washer
Crimp-type terminal
Wire
Terminal blocks
Tightening torque [N·m (lbf·in1)]
M4 screw
9374747115_IM_En.indd 8
CAUTION
1Φ 208/230V (60Hz)
187-264V
*1)
Remarks
10AWG 2 cable + Ground, 1 Ø 208/230V
14AWG 3 cable + Ground, 1 Ø 208/230V
2)
Specification *
Current : 30 (A)
Leakage current : 30mA 0.1sec or less *
Power supply cable
and connection cable
Crimp-type terminal
Sleeve
Screw with special washer
Crimp-type terminal
Wire
1.2 to 1.8 (10.6 to 15.9)
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Connection diagrams

INDOOR
INDOOR UNIT A
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(FIELD SUPPLY)
INDOOR UNIT B
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(FIELD SUPPLY)
INDOOR UNIT C
TERMINAL
1
3)
2
3
DISCONNECT SWITCH
G
(FIELD SUPPLY)
INDOOR UNIT D
TERMINAL
1
2
3
DISCONNECT SWITCH
G
(FIELD SUPPLY)
Disconnect switch for over current protection given in the table below is to be installed
between the indoor unit and the outdoor unit.
Disconnect switch
15A
Be sure to refer the above diagram and do correct field wiring.
Wrong wiring causes malfunction of the unit.
Check local electrical codes and also any specific wiring instructions or limitation.
OUTSIDE
OUTDOOR UNIT
(Inter-unit)
TERMINAL
Power lines
UNIT A
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT B
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT C
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
UNIT D
208/230 V
1
208/230 V
2
208/230 V
3
Grounding
line
G
L1
L2
WARNING
CAUTION
En-8
20/12/2553 8:58:45