BN interface Installation Manual
9
-EN
Termination resistance setting
• TU2C-LINK / TCC-LINK termination resistance setting ............<For TCC-LINK>
Leave just 1 line of the termination resistance in the
interface board of the outdoor unit (centre unit) ON, and
turn all the others OFF. (Refer to the wiring diagram
attached to the outdoor unit for the position of SW.)
<For TU2C-LINK>
For the central control wiring (Uh line), set the termination
resistance that is farthest away on the wiring between this
central controller and the other unit (VRF, light
commercial, air to air heat exchanger, general purpose
control interface, air to water heat pump) to ON.
Refer to the manual of each model for the termination resistance setting method.
Shield grounding process
• Central control wiring shielded wire ...........................................When using the central remote controller with one unit,
open the shielded wire of the central control wiring and
perform insulation processing.
When using the central remote controller with multiple
units, connect the shield of the central control wiring to the
closed end and open the shield at the final end of the
central remote controller to perform insulation processing.
Perform the central control wiring shield grounding on the
air conditioner side.
• Be sure to install a circuit breaker or all-pole isolating switch (with a contact breaking distance of at least 0.12" (3 mm)) on
the primary side of the power supply.
• Fasten the screws to the terminal block with torque of 0.37 lbf • ft (0.5 N•m).
U3 U4
LINK (Uh)
U3 U4
LINK (Uh)
U3 U4
LINK (Uh)
U3 U4
LINK (Uh)
Termination resistance
ON
Termination resistance
OFF
Termination resistance
ON
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