Blue Box 41
5. START-UP
5.1 PRELIMINARY CHECKS
- Check that the electrical connections have been made correctly, and that all terminals are well tightened.
- Check that the voltage on the RST terminals is 400 V ± 5% (or the unit’s rated value, in the event of units
supplied to run on non-standard power supplies). If the mains voltage is subject to frequent fluctuations, consult
our Engineering Department to discuss the necessary protection systems.
- Check that the display shows the gas pressure in the refrigerant circuit.
- Inspect the unit for refrigerant leaks using a leak detector if necessary.
- Check that the crankcase heaters are correctly supplied with power.
5.2 OPERATING DESCRIPTION
5.2.1 Introduction
The microprocessor control regulates the water temperature of the evaporator maintaining it at the set-point
value acting on the compressors management.
As well as the compressors the controller manages the operation of other components of the chiller such as the
pumps (ST version) and fans, with relative operating times and alarms, and “ancillary” functions such as condensation
control, etc., as described below.
Almost all the parameters referred to below (set-points, differentials, calibration, delays...) can be programmed
by means of the various menus. Refer to the specific manual for the pCO
2
controller.
5.2.2 Unit in stand-by mode
The unit is in stand-by mode when it is supplied with power but not actually enabled to operate.
In this condition the display shows the values of the various machine parameters, but compressor is inhibited.
When in stand-by mode the unit can be powered on.
Power-on is obtained by pressing the “ON-OFF” button of the microprocessor control or via serial or an external
interlock.
The heaters must be connected at least 12 hours before starting the unit;
the heaters are automatically connected when the main disconnect switch
is set to the ON position.
Significant leakage of R407C refrigerant in the gaseous state will alter
the percentages of the remaining mixture with consequent fall-off of
performance.
- Verify that heaters are working correctly: after the warm up period the crankcase must be warm to the touch
and must have at least a temperature 10 - 15 °C higher than ambient temperature.
- Check that all hydraulic connections are correctly installed and all indications on unit labels are observed.
- Check that the hydraulic system has been vent to eliminate any air remaining; charge it gradually and open the
vent devices on the upper part, provided at the care of the installer together with an expansion tank of a proper
size.
Summary of Contents for KAPPA V SR
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Page 29: ...Blue Box 23 HYDRAULIC CIRCUIT DIAGRAM VERSION KAPPA V SR ST 2PS...
Page 40: ...Blue Box 34 ELECTRICAL PANEL LAY OUT MODELS 65 2 100 2...
Page 69: ...Blue Box 63 KAPPA V SR REFRIGERANT CIRCUIT...
Page 70: ...Blue Box 64 KAPPA V SR HP REFRIGERANT CIRCUIT...
Page 71: ...Blue Box 65 KAPPA V SR DC REFRIGERANT CIRCUIT...
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