GB
985408004
12/20
8.4 Power connection
CAUTION!
• The cooling unit must be connected to the mains by means of a
disconnecting device with a contact gap of at least 3 mm when
switched off.
• No temperature control must be series-connected to the cooling
unit feed.
The fuse as indicated on the ID plate must be series-connected as
line protection.
•Power connection and repairs, if applicable, may only be carried
out by authorized trained electricians.
Power supply connection (mains):
Both mains voltage and frequency must correspond to the nominal
values indicated on the ID plate of the cooling unit.
• The installation of the power cable is not subject to any special
requirements
Attention: The cooling unit may be damaged if the
voltage is too high.
Refers to cooling units for nominal voltages 400 V/460V.
As an option, some units, different to the standard (400
V/460 V), may be connected to a different mains voltage
(For voltage range see enclosed sheet).The feed cables on
the transformer primary must be unclamped for this.
8.5 Service interface
The service interface is only intended for temporary data exchange
and not for continuous operation.
9
Operating Conditions
• Voltage must be within ± 10 % of the value indicated.
Frequency must be within ± 3 Hz of the value indicated.
• Ambient temperature must be below 55 °C (for options see
supplement).
• Use the unit such that the cooling capacity suits the actual de-
mand.
• Use refrigerant as indicated only.
• Use genuine spare parts only.
10 Putting into operation and function
10.1 General remarks
The cooling unit is provided with an electronic control system. The
drawn-in switch cabinet internal air temperature is measured by a
temperature sensor. By means of a DIP switch on the standard
control board, different switch cabinet temperatures as well as upper
limit temperatures can be selected (see accompanying supplement
sheet).
Exceeding the limit temperature generates an alarm. For units with
Multi-Controller, the lower temperature limit can also be monitored.
Warning!
Ambient conditions and temperature in the switch cabinet
must be in accordance with the values indicated in the sup-
plement.
