Electrical Wiring - Mitsubishi PUMY-P100YHM Technical & Service Manual

10

ELECTRICAL WIRING

This chapter provides an introduction to electrical wiring for the CITY MULTI-S series, together with notes concerning power
wiring, wiring for control (transmission wires and remote controller wires), and the frequency converter.
10-1. 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 60245 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.
10-2. WIRE DIAMETER AND MAIN POWER SWITCH CAPACITY
10-2-1. Wiring diagram for main power supply
Power supply
(3phase 380-400-415V, 50Hz)
Power supply
single phase
50Hz 220-230-240V
10-2-2. Power supply wire diameter and capacity
Model
Outdoor Unit P100-140
Indoor Unit
*1. A breaker with at least 3.5mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
Breaker for Wiring
and Current Leakage
Breaker for Wiring
and Current Leakage
Power Supply
Main Cable
3N~ AC380/400/415V, 50Hz
~/N AC220/230/240V, 50Hz
Outdoor unit
Indoor unit
Grounded
Minimum Wire Thickness (mm ) 2
Branch Ground
1.5 – 1.5
1.5 1.5 1.5
74
Grounded
Pull box
Breaker for Breaker for Current
Wiring*1
Leakage
16 A 16 A 30 mA 0.1 sec. or less
15 A 15 A 30 mA 0.1 sec. or less