Mitsubishi Electric TRANE TPVFYP54AM141 Serie Manuel D'installation page 22

13. Electrical wiring
Warning:
Electrical work should be done by a qualified electrical
contractor in accordance with "Engineering Standards for
Electrical Installation" and supplied installation manuals.
If the power circuit lacks capacity or has an installation
failure, it may cause a risk of electrical shock or fire.
− Be sure to follow local and national code requirements
when wiring these units.
− Install the unit in a manner to prevent that any of the
control circuit cables (remote controller, transmission
cables) are brought in direct contact with the power cable
outside the unit.
− Ensure that there is no tension on any wire connections
− Some cables (power, remote controller or transmission)
above the ceiling may become damage by accident or by
animals. Use conduit as much as possible to prevent this.
− Never connect the power cable to leads for the
transmission cables. The cables will be broken.
− Be sure to connect control cables to the indoor unit,
remote controller and the outdoor unit.
− Perform wiring in compliance with the safety regulations
detailed in UL 1995.
− Be sure to install an earth leakage breaker to the
power.
− Install the unit to prevent that any of the control circuit
cables (remote controller, transmission cables) is
brought in direct contact with the power cable outside
the unit.
− Ensure that there is no slack on all wire connections.
− Some cables (power, remote controller, transmission
cables) above the ceiling may be bitten by mouses.
Use as many metal pipes as possible to insert the
cables into them for protection.
Caution:
Be sure to ground the unit. Do not connect the grounding
cable to any gas pipe, water pipe, lightening rod, or
telephone earth cable. Incomplete grounding may cause a
risk of electrical shock.
If the supply cord is damaged, it must be replaced by
the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
External I/O specifications
Caution:
Wiring should be covered by insulation tube with
supplementary insulation.
Use relays or switches with IEC or equivalent standard.
The electric strength between accessible parts and control
circuit shouldhave 2750 V or more.
Types of control cables
Wiring transmission cables (M-NET)
Types of transmission cable: Shielded wire CVVS or CPEVS
Cable diameter: (AWG16)
Maximum wiring length: Within 200 m (656 ft.)
Maximum length of transmission lines for centralized control and
indoor/outdoor lines (Maximum length via indoor units): 500 m [1640
ft.] MAX.
The maximum length of the wiring between power supply
(PAC-SC51KUA) for transmission lines (on the transmission lines for
centralized control) and each outdoor unit and system controller is
200 m (656 ft.).
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13.1. Remote controllers
M-NET (ME) Controllers
Type of transmission cable: Sheathed 2-core cable (unshielded)
Cable diameter: (AWG18)
Note: When 10 m (33 ft.) is exceeded use same cable as
specified for transmission wiring above.
MA Controllers – Minimum 18 gauge
Type of transmission cable: Sheathed 2-core cable (unshielded)
Cable diameter: (AWG18)
Note: Length not to exceed 200 m (265').
Wire size for Main Power Supply and On/Off
Capacities.
Minimum Wire size AWG
Main Cable: 14
Branch: 14
Ground: 14
Breaker for Wiring (NFB)
15 A
Caution:
DO NOT POWER THE ELECTRIC HEAT FROM THE
OUTDOOR UNIT. FOLLOW THE APPROPRIATE
WIRING SCHEMATIC FOUND IN THE ELECTRIC
HEATER INSTRUCTIONS.