Products Electric Installation - Delta 21CK018C24 Instruction Manual

5、All line connections must conform to the schematic diagram of lines. Wrong connection may
cause abnormal operation or damage of the air-conditioning unit.
6、Do not let any cable contact the refrigerant pipe, the compressor and moving parts such as fan.
7、Do not change the internal line connections inside the air-conditioning unit. The manufacturer
shall not be liable for any loss or abnormal operation arising from wrong line connections.
Connection Of the Power Cable
1. Air-conditioning unit with single-phase power supply
（1） Remove the front-side panel of the outdoor
unit.
（2） Pass the cable though rubber ring.
（3） Connect the power supply cable to the "L, N"
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 front-side panel of the outdoor
unit.
（2） Attach rubber ring to the cable-cross hole of
the outdoor unit.
（3） Pass the cable though rubber ring.
（4） Connect the power cable to the terminal and earthing screws marked "L1, L2, L3 & N".
（5） Use cable fastener to bundle and fix the cable.

12.5 Products Electric Installation

The unit should be reliably earthed, if it is improperly earthed that may cause electric
shock or fire.
Wiring layout
Installation should be conducted by National Wiring Regulation.
☆
☆ The rated voltage and exclusive power supply must be adopted for the air conditioners.
☆ The power cable should be reliable and fixed, in order to avoid the wiring terminal be suffered
from force. And do not drag the power cable forcibly.
☆ The wire diameter of power cable should be large enough, if power cable and connection wire
For air-conditioner with auxiliary
heater, it is required to connect the
power cable to the "L1, L2 L3
" terminals and the grounding screw.
Take great care when carrying out the
following
malfunction
because of electromagnetic interference.
(1) The signal line of the wire controller must
be separated from the power line and the
connecting line between the indoor unit and
the outdoor unit.
(2) In case the unit is installed in a place
vulnerable by electromagnetic interference, it
is better
double-twisted cable as the signal line of the
wire controller.
Caution！
57
Caution:
Caution:
connections, so
of the air-conditioning
to use shielded
as to avoid
unit
cable or