Electrical Wiring; Power Supply Wiring - Mitsubishi Electric CITY MULTI PWFY-P36NMU-E-BU Installation Manual

10. Electrical wiring

Precautions on electrical wiring
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 re.
3. Install the unit to prevent that any of the control circuit cables (remote con-
troller, transmission cables, or external input/output line) is brought in direct
contact with the power cable outside the unit.
5. Some cables (power, remote controller, transmission cables, or 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.
1. Transmission cables
PWFY-P36NMU-E-BU
Transmission cables
Shielding wire (2-core)
Type of cable
CVVS, CPEVS or MVVS
Cable diameter More than 1.25 mm
AWG No AWG 16
PWFY-P36/P72NMU-E2-AU
Transmission cables
Shielding wire (2-core)
Type of cable
CVVS, CPEVS or MVVS
Cable diameter More than 1.25 mm
AWG No AWG 16

10.1. Power supply wiring

ELECTRICAL WOR
1. Electrical characteristics
Model
Hz
PWFY-P36NMU-E-BU 60
Model
PWFY-P36NMU-E2-AU
PWFY-P72NMU-E2-AU
*1: unit data
2. Power cable speci cations
Model
Main cable
PWFY-P36NMU-E-BU 2.5 [12]
Model
Total
PWFY-P36NMU-E2-AU
operating
PWFY-P72NMU-E2-AU
current
[Fig. 10.1.1] (P. 6)
Ⓐ
Ⓑ
Ⓒ PWFY-P36NMU-E-BU
Ⓓ PWFY-P36/P72NMU-E2-AU
Ⓔ Pull box
MA Remote controller cables
Sheathed 2-core cable (shielded)
CVVS
2 0.3 1.25 mm 2 (0.75
AWG 18 to 16
- Max. length : 200 m [656 ft]
MA Remote controller cables
Sheathed 2-core cable (shielded)
CVVS
2 0.3 1.25 mm 2 (0.75
AWG 18 to 16
- Max. length : 200 m [656 ft]
Power supply
Volts Voltage range
Max. 253 V
208-230
Min. 187 V
Power supply
Hz Volts
60 208-230
2
) [AWG]
branch Ground
- 2.5 [12] 15.71
2
Main cable branch Ground
16 A or less 1.5 [14] 1.5 [14] 1.5 [14]
25 A or less 2.5 [12] 2.5 [12] 2.5 [12]
32 A or less 4.0 [8] 4.0 [8] 4.0 [8]
6. Never connect the power cable to leads for the transmission cables. Other-
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 13.
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.
Types of control cables
1. Wiring transmission cables
Design wiring in accordance with the following table <Table 1. Transmission
cables>.
External input
Sheathed multi-core cable (shielded)
CVVS or MVVS
1.25 mm 2 ) 0.3 0.5 mm
AWG 22 to 20
Max. length : 100 m [328 ft]
External input
Sheathed multi-core cable (shielded)
CVV or MVV
1.25 mm 2 ) 0.3 0.5 mm
AWG 22 to 20
Max. length : 100 m [328 ft]
Compressor
MCA (A)
25 1.0
Voltage range
Max. 253 V
0.145-0.150
Min. 187 V
Local swich (A)
capacity fuse
25 25
) [AWG]
20 A 30 mA 0.1 sec. or less
30 A 30 mA 0.2 sec. or less
40 A 30 mA 0.3 sec. or less
Caution:
Do not use anything other than the correct capacity breaker and fuse.
Using fuse, wire or copper wire with too large capacity may cause a risk of
malfunction or re.
External output
Sheathed multi-core cable (unshielded)
CVV or MVV
2 0.3 1.25 mm
AWG 22 to 16
Rated voltage : L1-N : 208/230 V
Rated load : 0.6 A
External output
Sheathed multi-core cable (unshielded)
CVV or MVV
2 0.3 1.25 mm
AWG 22 to 16
Rated voltage : L1-N : 208/230 V
Rated load : 0.6 A
RLA (A)*1
SC (A) Heating
1.25 12.30-11.12
RLA (A)*1
Heating
25
Local swich (A)
capacity fuse
16 16 20
25 25 25
30 30 40
2
2
13