Electrical Wiring - Mitsubishi Electric PUMY-P100VHM Technical & Service Manual

9

ELECTRICAL WIRING

This chapter provides an introduction to electrical wiring for the CITY MULTI-S series, including notes concerning power wiring,
wiring for control (transmission wires and remote controller wires), and the frequency converter.
9-1. OVERVIEW OF POWER WIRING
Use a separate power supply for the outdoor unit and indoor unit.
(1).
Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
(2).
The wire size is the minimum value for metal conduit wiring.The power cord size should be 1 rank thicker consideration of voltage drops.
(3).
Make sure the power-supply voltage does not drop more than 10 %.
Specific wiring requirements should adhere to the wiring regulations of the region.
(4).
Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 245 IEC57).
(5).
For example,use wiring such as YZW.
Install an earth longer than other cables.
(6).
Warning:
Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly,
·
it may cause heating or fire.
Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct
·
current.
Caution:
Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric
·
shock.
Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a
·
malfunction of unit or fire.
9-2. WIRE DIAMETER AND MAIN POWER SWITCH CAPACITY
9-2-1. Wiring diagram for main power supply
Power supply
single phase
50Hz 220-230-240V
60Hz 220V
Power supply
single phase
50Hz 220-230-240V
60Hz 220V
9-2-2. Power supply wire diameter and capacity
Power Supply *2
Model
~/N AC 220/230/240V 50Hz
Outdoor Unit P100-140
~/N AC 220V 60Hz
~/N AC 220/230/240V 50Hz
Indoor Unit
~/N AC 220V 60Hz
*1. A breaker with at least 3.0mm contact separation in each pole shall be provided. Use non-fuse breaker (NF) or earth
leakage breaker (NV).
*2. Max. Permissive system Impedance : 0.22(")
Breaker for Wiring
and Current Leakage
Outdoor unit
Breaker for Wiring
and Current Leakage
Indoor unit
Minimum Wire Thickness (mm
Main Cable Branch
5.5(6)
1.5
Grounded
2 ) Breaker for
Ground Wiring*1
–
5.5(6)
32 A
1.5
1.5 15 A
70
Grounded
Pull box
Breaker for Current Leakage
32 A 30 mA 0.1 sec. or less
15 A 30 mA 0.1 sec. or less