Installation and Commissioning 5
10
ST16135-00C
5.4
Electrical Installation (Fig. 5.2)
WARNING !
BEFORE STARTING WORK, ENSURE THAT THE
MAIN-LINE FUSES HAVE BEEN REMOVED FROM
THE DISTRIBUTION BOARD. PRECAUTIONS
SHOULD BE TAKEN TO PREVENT THEM BEING
REFITTED UNTIL THE INSTALLATION IS
COMPLETE.
Starter cables must be connected to the mains electrical supply
via a lockable, switched and suitably rated fused isolator. The
isolator should be positioned as near as possible to the
compressor with clear, unrestricted access.
To access the starter terminals, unlock the starter door panel with
the key provided. Pass the incoming cables through the entry hole
in the floor and connect the three mains supply cables to the
contactor terminals marked L1, L2 and L3, and connect the earth
cable to the earth pin E. Ensure the connections are secure.
Fig. 5.2 - Electrical Connections to Starter
Terminal
Cable sizes specified on the circuit diagram are the minimum size
to suit a typical installation. If the compressor is located a long
way from the isolator and/or the ambient temperature exceeds
35°C, the cable size should be increased.
Refer to IEEE Regulations for electrical equipment installed in
buildings to determine the size required, pay particular attention to
the circuit diagrams provided.
Check that the transformer fuse is positioned to suit the supply
voltage of the installation.
Ensure all electrical connections are tight, high voltage supply to
contactors and incoming terminals are critical.
Close the starter door and secure with the key provided.
Replace the main line fuses.
5.5
Check Direction of Motor Rotation
WARNING !
READ HEALTH AND SAFETY PRECAUTIONS
BEFORE STARTING COMPRESSOR.
Ensure that the compressor is filled with approved oil and that all
plugs are fitted securely.
The cooling fan in the rear of the unit may be used as a visual aid
to determine the correct rotation of the compressor.
To view the cooling fan, remove the cabinet filter from the lower
half of the rear panel, the cooling fan can be viewed through the
mesh grill.
With the mains isolator on, press the green start button mounted
in the control panel. Compressor rotation is correct if the cooling
fan rotates in a clockwise direction.
For single speed compressors, if rotation is correct, the
compressor pressure display will rise immediately after starting. If
rotation is not correct, the compressor pressure display will not
rise.
Rotation for RS compressors will always be correct due to the
inverter drive, however the cooling fan
must
be checked for
correct clockwise rotation.
CAUTION !
If direction of rotation is incorrect, stop the
Compressor immediately. Serious damage will
occur if the motor is allowed to run in reverse!
WARNING !
IF DIRECTION OF COMPRESSOR OR COOLING
FAN ROTATION IS INCORRECT, STOP THE
COMPRESSOR AND LOCK THE ISOLATOR IN
THE OFF POSITION. FIT A SAFETY NOTICE TO
THE ISOLATOR ADVISING THAT WORK IS BEING
CARRIED OUT ON THE COMPRESSOR.
Open the starter door with the key provided to gain access to the
starter terminals.
Change over any two of the incoming cables connected to the
starter terminals L1, L2 and L3.
Close the starter enclosure door and lock with the key provided to
prevent unauthorised access.
Remove the safety notice and switch the mains electricity supply
on.
Restart the compressor and verify that direction of rotation of both
the compressor and cooling fan are correct.
Replace the cabinet filter in the rear panel with the direction arrow
pointing inwards towards the cooling fan.
