Electrical Wiring; Power Supply Wiring - Mitsubishi Electric CITY MULTI PEFY-AF1200CFM Manuel D'installation

9. Electrical wiring

Precautions on electrical wiring
Warning:
Electrical work should be done by qualified contractors in accordance with
"Engineering Standards For Electrical Installation" and supplied installation
manuals. Special circuits should also be used. If the power circuit lacks ca-
pacity or has an installation failure, it may cause a risk of electric shock or
fire.
1. Be sure to install a ground breaker to the power.
2. Install the unit to prevent that any of the control circuit cables (remote control-
ler, transmission cables) coming in direct contact with the power cable outside
the unit.
3. Ensure that there is no slack on all wire connections.
4. Some cables (power, remote controller, transmission cables) above the ceiling
may be bitten by rodent. Use as many metal pipes as possible to protect the
cables.
5. Never connect the power cable to leads for the transmission cables. Otherwise
the cables would be broken.
<Table 1>
System configuration
Transmission cable length
Facility example Residence or independent store
(for electrical noise judgment) without electrical noise
VCTF, VCTFK, CVV, CVS, VVR,
Types of transmission
VVF, VCT or shielding wire
cables
CVVS or CPEVS
Length
2. Remote controller cables
Types of cables Sheathed 2-core cable (unshielded) CVV
2
Cable diameter 0.3 to 1.25 mm
Length Less than 200 m

9.1. Power supply wiring

[Indoor 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 [1/8 in.] contact separation in each pole shall be
provided by the Air conditioner installation.
Power cable size: more than 1.5 mm
[Fig. 9.1.1] (P.5)
A Switch 16 A
C Indoor unit
D Total operating current be less than 16 A
E Pull box
[Outdoor unit]
Thickness of wire for main power supply, on/off capacities
<Power source: 208V / 230V>
Model Unit combination
PUHY-P72THMU-A(-BS)
Outdoor
PUHY-P96THMU-A(-BS)
unit
PUHY-P120THMU-A(-BS)
<Power source: 460V>
Model Unit combination
PUHY-P72YHMU-A(-BS)
Outdoor
PUHY-P96YHMU-A(-BS)
unit
PUHY-P120YHMU-A(-BS)
12
All manuals and user guides at all-guides.com
For a single-refrigerant system
Less than 120 m [394 ft]
Building, clinic, hospital or communications
station without electrical noise supposedly
generated from inverter equipment, private
power generator, high-frequency medical
equipment, radio-used communications
equipment and so on
Less than 120 m [394 ft]
MA remote controller
[AWG22 to 16]
[656 ft]
2
[AWG16]
B Overcurrent protection 16 A
Minimum wire thickness (mm
Main cable Branch
- 5.3 [10] -
- 13.3 [6] -
- 21.2 [4] -
Minimum wire thickness (mm
Main cable Branch
- 2.1 [14] -
- 3.3 [12] -
- 5.3 [10] -
6. Be sure to connect control cables to the indoor unit, remote controller, and the
outdoor unit.
7. Put the unit to the ground on the outdoor unit side.
8. Select control cables from the conditions given in page 12 .
Caution:
Be sure to put the unit to the ground on the outdoor unit side. Do not con-
nect the ground cable to any gas pipe, water pipe, lightening rod, or telephone
ground cable. Incomplete grounding may cause a risk of electric shock.
Types of control cables
1. Wiring transmission cables
• Types of transmission cables
Design wiring in accordance with the following table <Table 1>.
• Cable diameter
More than 1.25 mm 2 [AWG16]
More than 120 m [394 ft]
Shielding wire CVVS or CPEVS
Sheathed 2-core cable (unshielded) CVV
2
0.3 to 1.25 mm [AWG22 to 16]
Add any portion in excess of 10 m [32 ft] to within the longest allowable transmis-
sion cable length 200 m [656 ft] (Shielding portion is more than 1.25 mm
[Selecting non-fuse breaker (NF) or ground breaker (NV)]
To select NF or NV instead of a combination of Class B fuse with switch, use the
following:
• In the case of Class B fuse rated 15 A or 20 A,
NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)
NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)
Use an ground breaker with a sensitivity of less than 30 mA 0.1 s.
2 [AWG]) Swtich (A)
Breaker for
wiring (NFB)(A)
Capacity Fuse
Ground
5.3 [10] 30 30
13.3 [6] 40 40
21.2 [4] 50 50
2
[AWG]) Swtich (A)
Breaker for
wiring (NFB)(A)
Ground Capacity Fuse
2.1 [14] 15 15
3.3 [12] 20 20
5.3 [10] 25 25
For a multi-refrigerant system
Regardless of length
All facilities
Less than 200 m [656 ft]
M-NET remote controller
Breaker for current leakage
30 30 A 30 mA or 100 mA 0.1 sec. or less
40 40 A 30 mA or 100 mA 0.1 sec. or less
50 50 A 100 mA 0.1 sec. or less
Breaker for current leakage
15 15 A 30 mA or 100 mA 0.1 sec. or less
20 20 A 30 mA or 100 mA 0.1 sec. or less
25 25 A 30 mA or 100 mA 0.1 sec. or less
2 [AWG16])
Maximum
current (A)
22.7
36.3
49.9
Maximum
current (A)
10.3
16.4
22.6