Starting Operations - Galletti LCX Series User Manual

LCX
The diagram above illustrates a specific property [Charles' Law] of gases, which are more soluble in
liquids as the pressure increases but less soluble as the temperature increases: if the oil is held at a
constant pressure, an increase in temperature will significantly reduce the amount of refrigerant
dissolved in it, thus ensuring that the lubricating function desired is maintained. At the same time it
should be observed that a slight foaming [1-5 mm] of the oil at start-up (pressure drop => decrease in
% of solubility] is normal and will not compromise the system's reliability.
- Check that the plumbing connections have been properly made according to the indications given on
the plates located on the unit itself (proper inlet and outlet connections).
- Make sure that the water circuit is duly bled to completely eliminate the presence of air: fill the circuit
gradually and open the air vent valves on the top part, which the installer should have set in place.
7.2

STARTING OPERATIONS

Before starting the chiller, turn the main switch off, select the desired operating mode from the control
panel [red button = heating, green button = cooling] and press the "ON" button on the control panel.
The unit will start up if enabled:
by the safety devices of the water circulation pump/s.
-
by the flow switch (or differential pressure switch).
-
by the T sensor measuring the temperature of the water returning from the system [chiller inlet].
-
and no alarms have been triggered.
-
Start-up:

Check that all external cocks of the water circuit are open and water flows properly (the flow alarm should
not be triggered).

Put the main switch in the ON position.
The pump will start immediately.
o
After 60 seconds the compressor will start
o

Check the water temperature differential (12-7°C to be detected by means of a thermometer on the inlet
and outlet water pipes of the unit).

Check that there are no leaks on the refrigerant side and water side.

Using all the screws and panels supplied, close the unit.
If the unit fails to start up, check whether the set point has been set on the desired values.
You should not disconnect the unit from the power supply during periods when it is
inoperative but only when it is to be taken out of service for a prolonged period (e.g. at
the end of the season). To turn off the unit temporarily follow the directions provided in
the section 7.6 "Stopping the Unit".
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