Cooper&Hunter CH-IRT05NM, Руководство по обслуживанию, Страница: 47 / 110

Rooftop Packaged Service Manual INSTALLATION
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2) Remove the screw from the terminal board.
3) Clamp a round terminal of the peeled wires.
4) Screw cross the circle and fix it on the terminal board.
3.1.3 Electrical connections-supply voltage:
(1) Air-conditioning unit with single-phase power supply
1) Remove the Electric Box Cover of the unit.
2) Pass the cable through rubber ring.
3) Connect the power s
upply cable to the “L1, L2” terminals and the grounding screw.
4) Use cable fastener to bundle and fix the cable.
(2) Air-conditioning unit with 3-phase power supply
1) Remove the Electric Box Cover of the unit.
2) Pass the cable through rubber ring.
3) Connect the p
ower supply cable to the “L1, L2, L3” terminals and the grounding screw.
4) Use cable fastener to bundle and fix the cable.
(3) Low Voltage Connections
Low voltage wiring must use coppery cord. A minimum of 18AWG must be used for distance up to 50´
and 16AWG for distance over 50´.
1) Remove the Electric Box Cover of the unit.
2) Pass the signal cable of the wire controller through rubber ring.
3) Co
nnect the signal cable to the “1, 2” terminals.
4) Use cable fastener to bundle and fix the cable.
Cautions
：
Take great care when carrying out the following connections, so as to avoid malfunction of the
air-conditioning unit because of electromagnetic interference.
①
The signal line of the wire controller must be separated from the power line.
②
In case the unit is installed in a place vulnerable by electromagnetic interference, it is better
to use shielded cable or double-twisted cable as the signal line of the wire controller.