Single compressors
Electrical data, connections and wiring
Wiring & EMC protection
The motor compressor power supply from
the CDS803 frequency converter to the VZH
compressor must be done with a braided
screened/shielded cable. This cable needs to
have its screen/shielding conduit connected to
earth on both ends. Avoid terminating this cable
connection with twisting ends (pigtails) because
that would result in an antenna phenomenon
and decrease the effectiveness of the cable.
Control cables to the CDS803 frequency
converter must use the same installation
principles as the motor power supply cable.
The motor compressor cable must be installed in
a conduit separated from the control and mains
cables.
Physical installation of the frequency converter
on the mounting plate must ensure good
electrical contact between the mounting plate
and the metal chassis of the converter. Use star-
washers and galvanically conductive installation
plates to secure good electrical connections.
Refer to instructions MG18N102 for tightening
torques and screw sizes.
Note that the CDS803 must be mounted on a
plain wall to ensure a good air flow through its
heat exchanger.
From network to frequency converter
From frequency converter to compressor
Type
mm²
AWG
Type
mm²
AWG
200 - 240 V
CDS-6kW(IP20)
6
10
VZH028-J
6
10
CDS-7.5kW(IP20)
6
10
VZH035-J
6
10
CDS-10kW(IP20)
10
8
VZH044-J
10
8
380 - 400 V
CDS-6kW(IP20)
4
10
VZH028-G
4
10
CDS-7.5kW(IP20)
4
10
VZH035-G
4
10
CDS-10kW(IP20)
4
10
VZH044-G
4
10
Note: The wire size here is the guideline but not the actual cable required. The required cable size should be specified by the OEM
depending on the unit design, ambient temperature, the wire material, current, etc.
Wire sizes
Below table lists recommended wiring sizes for the motor compressor power supply cables. These
wiring sizes are valid for a cable length up to 20m.
19
FRCC.PC.034.A2.02
Application Guidelines
