Part 3 - Ins
talla
tion and Field Se
ttings
DC Inverter Chiller
51
All electric wires must conform to local wiring connection norm. The suitable cables should be connected to power
supply terminal through wiring connection holes at the bottom of the electric cabinet. According to Chinese
standard, the user is responsible for providing voltage and current protection for the input power supply of the unit.
All power supplies connected to the unit must pass one manual switch, to ensure that the voltages on all nodes of
electric circuit of the unit are released when the switch is cut off.
The cables of correct specification must be used to supply p
ower for the unit. The unit should use independent
power supply, and the unit is not allowed to use the same power supply together with other electric devices, to
avoid over-load danger. The fuse or manual switch of the power supply should be compatible with working voltage
and current of the unit. In case of parallel connection of multiple modules, the requirements of wiring connection
mode and configuration parameters for the unit are shown in the following Table 3-4.1.
Some connection ports in the electric box are switch signals, for which the user needs to provide power, and the
rate voltage of the power should be 220-230V AC. The user must be aware that all power supplies they provided
should be obtained through power circuit breakers (provided by the user), to ensure that all voltages on the nodes
of the provided power supply circuit are released when the circuit breakers are cut off.
All inductive components provided by the user (such as coils of contactor, relay, and so on) must be suppressed with
standard resistance-capacitance suppressors, to avoid electromagnetic interference, thus leading to failure of the
unit and its controller and even damages to them.
All weak current wires led to the electric box must apply shielded wires, which must be provided with grounding
wires. The shield wires and power supply wires should be laid separately, to avoid electromagnetic interference.
The unit must be provided with grounding wires, which are not allowed to be connected with the grounding wires
of gas fuel pipelines, water pipelines, lightning conductors or telephones. Improper earth connection may cause
electric shock, so please check whether earth connection of the unit is firm or not frequently.
Figure 3-4.1: Diagram of manual switch for the system
Note: up to 4 units can be combined at most.
Table 3-4.1: Power supply specifications
Model
Outdoor power supply
Wiring
Power supply
Manual switch
Fuse
KEM-30 DRS4
KEM-30 DRS4 KH
380-415V 3Ph~50Hz
50A
36A
10mm
2
X5(<20m)
KEM-60 DRS4
KEM-60 DRS4 KH
380-415V 3Ph~50Hz
100A
70A
16mm
2
X5(<20m)