21
ELB
Chart 29
9.1 requirement of the wiring
For VRF system, all indoor units must be supplied with one power supply (220V/50Hz 1 phase, please refer
to 9.2.2). IDU power supply can either use the same power supply from outdoor unit(preferred) or use a
separate power supply. For indoor unit wires requirement, please refer to indoor installation manual; outdoor
unit wires requirement is as below:
(1)Power supply wire:
Ourdoor
unit model
Phase and
Frequency
Volts
ELB
Wire section
Maximum length
112
Single phase-50Hz
220V
≥ 40A
6mm
2
25m
140
Single phase-50Hz
220V
≥ 40A
6mm
2
25m
160
Single phase-50Hz
220V
≥ 40A
6mm
2
25m
Table 15
ELB:Electricity leakage breaker.
(2)Communication wire:
Main communication wire
R/C communication wire
1.02mm twisted wires
1.02mm twisted wires
≤ 2000m
≤ 100m
Table 16
CAUTION
1 Suggest use shielded two twisted wires, If use shielded wires, the wires must be grounded;
2 Power wires and communication wires cannot be placed in one slot; they must be separated;
9 fIeLD wIrING
