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II.7.2.3
Checking electric connections
START
Is the unit powered according to the values on the
data plate?
YES
Is the phase sequence correct?
YES
Does the earthing conform to current regulations?
YES
Are the power circuit electric conductors of the size
indicated in the manual?
YES
Is the circuit breaker positioned upstream the unit and
of the right size?
YES
The electric connection is compliant!
II.7.2.4
Commissioning
Activate the compressor power circuit breaker switches again.
Simulate an empty start in order to ensure that the power
contactors have been inserted correctly.
Are the power contactors inserted correctly?
Disconnect the power from the auxiliary circuit again.
Activate the compressor power circuit breaker switches again.
Power the auxiliary circuit.
Start up the machine using the control panel
Choose the operating mode (MODE key).
Check the correct rotation of the pumps and fans, the flows and
the operation of the heat exchangers sensors.
Starting procedure completed!
START
YES
(ON/OFF key).
NO
Restore the correct power supply.
NO
Restore the correct phase sequence.
NO
Danger! Restore earthing!
NO
Danger! Replace the cables immediately!
NO
Danger! Replace the component immediately!
NO
Check the component and replace it if necessary.
NO
20
SECTION II: INSTALLATION AND MAINTENANCE
All ON/OFF operations must be carried out
EXCLUSIVELY using the ON/OFF key on the control
panel.
Check the component and replace it if necessary.
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