GENER
AL INFORMA
TION
PR
ODUC
T INFORMA
TION
SY
STEM DESIGN
INTEGR
ATION INT
O SY
STEM
ORDERING INFORMA
TION
Electrical data, connections and wiring
The compressor terminal box IP rating according to IEC529 is IP22.
IP rating
Element
Numerals or letters
Meaning for the protection of equipment
First characteristic
numeral
0
1
2
3
4
5
6
Against ingress of solid foreign objects
(non protected)
≥ 50 mm diameter
≥ 12.6 mm diameter
≥ 2.5 mm diameter
≥ 1.0 mm diameter
dust protected
dust tight
Second
characteristic
numeral
0
1
2
3
4
5
6
7
8
Agains ingress of water with harmful effects
(non protected
vertically dripping
dripping (15° tilted)
spaying
splashing
jetting
powerful jetting
temporary immersion
continuous immersion
VZH scroll compressors are not equipped with
an internal motor protector. Motor protection
is provided by the variable speed drive. All
parameters are factory preset in order to
guaranty locked rotor or overload current
protection.
When a warning situation is reached in the
current control, the CDS frequency converter
will automatically reduce the compressor
speed in order to keep the motor current of the
compressor below the maximum allowed.
Motor protection
The maximum allowable voltage imbalance
between each phase is 3%. Voltage imbalance
causes high amperage over one or several
phases, which in turn leads to overheating and
possible drive damage.
Voltage imbalance
PR
ODUC
T INFORMA
TION
16
AB237586440343en-000601