Electrical Wiring - York TIWM006B21S Installation And Maintenance Manual

8.

Electrical Wiring

Perform electrical wiring work according to this manual and the "Installation and Maintenance Manual" for the
outdoor unit.
● All electrical work must be done as outlined in this manual and in accordance with this manual.
Substandard work can result in fire and damage to the unit.
● Use specified cables between units and choose the cables correctly. If not, an electrical shock or
fire may occur.
● Do not open the service cover or access panel for the indoor or outdoor units without turning OFF
the main power supply. It can result in an electrical shock.
● Turn OFF the main power switch of the indoor unit and the outdoor unit before attempting any electrical
wiring work or a periodical check is performed. If not, it will result in an electric shock or a fire.
● Check to ensure that the indoor fan and the outdoor fan have stopped before attempting any
electrical wiring work or for any scheduled electrical work that is being performed.
● Protect electrical wiring, condensate piping, and electrical components from threats posed by
burrowing animals and temperature extremes. Failure to do so can, over time, deteriorate system
performance.
● Tighten screws according to the following torque.
M3.5: 0.9 ft·lbs (1.2 N·m)
M4: 0.7 to 1.0 ft·lbs (1.0 to 1.3 N·m)
● Connect ground wiring for the outdoor / indoor unit to prevent electrical shock or an unexpected
discharge. The ground resistance must be less than 1 megohm. The grounding must be performed
by authorized installers.
● Disconnect or turn OFF the main power supply to prevent electrical shock when opening the
service cover to perform electrical maintenance.
● Take care not to pinch electrical wiring when attaching the service cover. Electrical fire or shock
can occur.
● Insulate all wiring with accessory packing and seal the connection hole against the threat of insects
or moisture.
● Pass the wires through the knockout hole on the side cover when using conduit.
● Perform the wiring work according to this manual and "Installation and Maintenance Manual" for the
outdoor unit.
● Connect correctly the power supply line phases.
● The communication cable between the indoor unit and the outdoor unit does not have any polarity.
Do not apply an excessively high voltage to this cable (Rated Voltage 5V). It may cause failure.
● The controller cable (Field-Supplied) does not have any polarity. Do not apply an excessively high voltage
to this cable (Rated Voltage 5V). It may cause failure.
● Maintain the rated voltage for the power supply.
Voltage that is too high or too low can damage the unit.
● Make sure there is sufficient capacity for the power supply. If not, operation cannot begin due to insufficient
voltage.
P5417052
NOTICE
23