E/0204/39/52
13. Electrical Connections
WARNING!
It is absolutely necessary, before making any connections, to use a suitable tester to
check the supply voltage. This must be the same as the voltage indicated on the technical
data plate.
The user must furnish and install, upstream from the unit, an isolating switch with pre-
fuse and capacity as specified on the technical plate in order to be able to perform
maintenance on the unit in the absence of electricity.
The ON/OFF-key on the C1010 keypad (if present) is only used for the unit stand-by. It
must therfore not be considered as a safety element to perform maintenance on the
unit. Maintenance must be done after disconnecting the power supply of the unit (see
note above).
•
Check the supply voltage and frequency;
•
Check that supply voltage and frequency are compatible with those for the unit.
•
Interrupt both main power and auxiliary power before working on the system;
•
Select connection cables (not supplied) according to EN60204-1 Standards
•
Check that power cables are installed with a sufficient distance from alarm cables, from the
network connection cable and from the master-slave connection cable.
•
On the main power supply lines, in preference install an omni-pole automatic switch, curve type
C, eventually complete of another differential switch. Alternatively, besides the isolating omni-
pole switch, install a safety fuse, retarded, aM type;
•
On the DC power supply lines, in preference install an omni-pole automatic switch, curve type
C, eventually complete of another differential switch. Alternatively, besides the isolating omni-
pole switch, install a safety fuse, retarded, aM type;
•
Verify carefully the polarities of DC power supply, as shown on the terminal board;
•
Verify that positive pole (+) of DC power supply is not earthed.
•
To make electrical connection of power supply, use cables with section suitable to the power
absorbed by the users. These cables must be compliant with current standards.
•
For 3-phase Scroll compressors: Take care of correct phase sequence after the connection of
the main power supply. The sequence is important for the correct sense of rotation and operation
of the 3-phase Scroll compressor. The correct compressor operation can be easily checked by
sensing the temperature at the condenser outlet. If this temperature is noticeably higher than the
external temperature, the compressors works correctly. Otherwise, the compressor rotates in
the wrong sense and the phase sequence must be changed.
ATTENTION!
The inobservance of these points can provoke damages or malfunction of components and
warranty shall become forthwith void.
Содержание Split-Air CST 40
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