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1. Electrical work
(1) General cautions
Warning:
Electrical work should be done by qualified electrical engineers in accordance with “Engineering Standards
For Electrical Installation” and supplied installation manuals. Special circuits should also be used. If the power
circuit lacks capacity or has an installation failure, it may cause a risk of electric shock or fire.
1. Be sure to take power from the special branch circuit.
2. Be sure to install an earth leakage breaker to the power.
3. Install the unit to prevent that any of the control circuit cables (remote controller, transmission cables, or external
input/output line) is brought in direct contact with the power cable outside the unit.
4. Ensure that there is no slack on all wire connections.
5. Some cables (power, remote controller, transmission cables external input/output line) above the ceiling may be
bitten by mouses. Use as many metal pipes as possible to insert the cables into them for protection.
6. Never connect the power cable to leads for the transmission cables. Otherwise the cables would be broken.
7. Be sure to connect control cables to the indoor unit, remote controller, and the outdoor unit.
8. Be sure to ground the unit.
9. Select control cables from the conditions given in page
60
.
Caution:
Be sure to put the unit to the ground on the outdoor unit side. Do not connect the earth cable to any gas pipe,
water pipe, lightening rod, or telephone earth cable. Incomplete grounding may cause a risk of electric shock.
(2) Power supply for PWFY unit
(2)-1 Electrical characteristics of PWFY unit
• Power supply cords of appliances shall not be lighter than design 245 IEC 57 or 227 IEC 57.
• A switch with at least 3 mm contact separation in each pole shall be provided by the Air conditioner installation.
(2)-2 Power cable specifications
Model
PWFY-P100VM-E-BU
Hz
5
0/60
Volt
s
220-230-240 V
Voltage range
Max. 264 V
Min. 198 V
MCA (A)
15.
71
Output (kW)
1.0
SC (A)
1.25
RLA (A)
Heating
11.63-11.12-10.66
Power supply
Compressor
PWFY-EP100VM-E1-AU
Hz
50/
60
Volts
220-230-2
40 V
Voltage range
Max. 264 V
Min. 198 V
MCA (A)
0.085
Cooling
Heating
Model
0.068-0.065-0.063
RLA (A)
Power supply
Main cable
2.5
Model
PWFY-P100VM-E-BU
Minimum wire thickness (mm
2
)
Ground
2.5
30 A 30 mA 0.1 sec or less
Local swich (A)
fuse
25
branch
-
Breaker for
current leakage
capacity
25
30
Breaker for wiring (NFB) (A)
branch
1.5
2.5
4.0
Model
Minimum wire thickness (mm
2
)
Local swich (A)
Breaker for current
leakage
capacity
Breaker for wiring (NFB) (A)
Main cable
1.5
2.5
4.0
Ground
1.5
2.5
4.0
fuse
PWFY-EP100VM-E1/E2-AU
Total
operating
current
16 A or less
25 A or less
32 A or less
20 A 30 mA 0.1 sec. or less
30 A 30 mA 0.1 sec. or less
40 A 30 mA 0.1 sec. or less
20
30
40
16
25
32
16
25
32
System Design
V
Model
PAC-SV01PW-E
0.070-0.074-0.077
RLA (A)
Power supply
Volts
220-230-240 V
Hz
50/60
Voltage range
Max. 264 V
Min. 198 V
Model
PAC-SV01PW-E
Minimum wire thickness (mm
2
)
branch
1.5
Main cable
1.5
Ground
1.5
PWFY-EP100VM-E2-AU
Hz
50/
60
Volts
220-230-2
40 V
Voltage range
Max. 264 V
Min. 198 V
MCA (A)
0.175
Cooling
Heating
Model
0.138-0.139-0.140
RLA (A)
Power supply