Electrical Wiring For Indoor Unit - York TIWM006B21S Installation And Maintenance Manual

8.2.3 Electrical Wiring for Indoor Unit

Refer to the "Installation and Maintenance Manual" for the outdoor unit for details on the electrical wiring
capacity for the outdoor unit. Setting DIP switches may be required, depending on the combination with the
outdoor unit.
(1) Connect the power supply wirings (L1 and L2) to the terminal block correctly.
TIWM006B21S to TIWM012B21S
TB2
A B 1
Controller Communication
Line
(2) Connect the communication cables between the indoor unit and the outdoor unit correctly.
Check to ensure that the terminal for power supply wiring (Terminals "L1" to "L1" and "L2" to "L2" for
each terminal block: AC208/230V) between the indoor unit and the outdoor unit correspond correctly.
If not, components will be damaged. Connect ground wiring to the terminals in the electrical box.
(3) Use 2-conductor, AWG18 (0.82mm
the communication cable between the outdoor unit and the indoor units. They are connected to the
terminals 1 and 2 of the terminal blocks. The controller cable is connected to the terminals A and B of
each indoor unit terminal block.
(4) The total cable length should not exceed 3281ft (1000m).
NOTE:
The total wiring length for the wired controller can be extended up to 1640ft (500m). If the total wiring
length is less than 98ft (30m), other cable can be used.
In Case of Using an Optional Wired Controller or Optional Receiver Kit
The following setting is required when the optional wired controller
or the optional receiver kit is used.
• The setting before shipment is "Wireless". Set SW2 to "Wired".
If not, the operation is not available.
• Connect the controller cables to the terminals A and B at the terminal block TB2.
In Case of Using an Optional Wireless Controller
• The SW2 switch setting is NOT required when the wireless controller is used with the receiver built into
the indoor unit. However, the multiple indoor unit operation is not available when this wireless controller is
used with the receiver built into the indoor unit. If the multiple indoor unit's operation is required with this
wireless controller, use the Optional Receiver Kit.
• If there are two indoor units installed close to each other, the wireless controller may not distinguish the
units. Use the function "Identifying Indoor Units Installed Side by Side", which the wireless controller
should be set to "B mode". (Refer to the "Installation and Maintenance Manual" for the wireless controller
about the "B mode" setting.)
26
TB1
2
L1 L2
Power Supply Line
Line
2
), stranded, copper cable, non-shielded, non-twisted cable for
NOTICE
TIWM015B21S to TIWM030B21S
TB1
A B
L1 L2
Power Supply Line
Controller
Line
DIP Switch PCB
Wired
Wireless
Change to "Wired" .
TB2
1 2
Communication
Line
SW2
P5417052