Galletti LCE 091 HS [21/64] Start up

LCE

RG66004766_rev.05

7 START-UP

7.1 PRELIMINARY CHECKS

- Check that all the valves in the cooling circuit are open (liquid line).

- Check that the electrical connections have been made properly and that all the terminals are

securely tightened. This check should also be included in a periodic six-month inspection.

- Check that the voltage at the RST terminals is 400 V ± 5% and make sure the yellow indicator light

of the phase sequence relay is on. The phase sequence relay is positioned in the middle right part of

the electric control board; if the sequence is not duly observed, it will not enable the machine to start.

- Make sure there are no refrigerant leaks that may have been caused by accidental impacts during

transport and/or installation.

- Check the power supply of the crankcase heating elements, where present.

The heating elements must be turned on at least 12-10 minutes before the unit is

started. This function is carried out automatically when the main switch is off. Their

function is to raise the T of the oil in the sump and limit the quantity of refrigerant

dissolved in it.

To verify whether the heating elements are working properly, check the lower part of the compressors:

it should be warm or in any case at a temperature of 10 -15°C higher than the ambient temperature.

Pressure

within the

crankcase

% of R410A dissolved in oil

Oil T