Table of Contents
Advertisement
Control Panel with Variable Frequency Drive
The fan speed is controlled on the basis of the actual process fluid temperature at the exit of the unit and the design
leaving temperature, ensuring a minimum in electrical consumption and noise levels.
The adiabatic pre-cooling will be activated and stopped on the basis of a pre-programmed logical combination of
the fan speed and the ambient temperature (release set-point). Default settings will not activate adiabatic pre-
cooling unless all fans are running at maximum permissible speed and the dry-to-adiabatic release set-point is
reached.
The adiabatic control logic is pre-programmed and is ready for operation.
Depending on the actual size of the installation, the controller pre-programmed parameters may need to be
adjusted.
ELECTRICAL FIELD WIRING
ALL OPERATIONS DESCRIBED BELOW MUST BE PERFORMED BY A LICENSED
ELECTRICAL TECHNICIAN AND MUST COMPLY WITH LOCAL REGULATIONS.
The equipment is standard provided with a door interlocked main power switch (Q
Connect electrical power to the power switch through a 3-pole cable, with ground, of adequate cross section for the
main fuse rating.
The power tension must not fluctuate more than ± 10%. The imbalance between the phases must not be
greater than ± 2%.
Connect the immersion sensor to the terminal strip as indicated in the wiring diagram.
PRE-COMMISSIONING
1. With main power switch open, check all electrical connections in electrical panel to be sure that they are tight
and provide good electrical contact. Although connections were tightened at the factory, they may have
loosened enough in shipment to cause a malfunction.
2. Check and inspect all water piping. Make sure flow direction is correct in counterflow, as shown by the arrows
on the connectors.
3. Check that the immersion sensor is properly located in the main cold water pipe so that the water is well mixed
where the temperature is measured.
4. The immersion sensor needs to be installed in such a way that any risk of water ingress is minimised.
16
W W W . B A L T I M O R E A I R C O I L . C O . Z A
Caution
), which is factory fitted.
0
Advertisement
Table of Contents
