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INSTALLATION OPERATIONS AND MAINTENANCE MANUAL - RXC/Hi SERIES
17.2 Checks during the operation
Check the rotation of the compressors and the fans. If the rotation is incorrect, immediately disconnect the unit from the main
switch and change any one of the phases entering the main switch, so as to invert the rotation sense of the motors.
After a few operating hours, check the liquid sight glass has a greenish colour on its central part: should this be yellow, then
some humidity could be present inside the circuit. In this case it will be necessary to dehydrate the circuit (only to be done by
qualified personnel). Check that no air bubbles appear on the liquid sight glass. In this case it would be necessary to reintegra-
te the refrigerant charge. The presence of steam bubbles is however tolerated.
Some minutes after the switching on of the unit, check that the equivalent temperature of the refrigerant gas, as measured
at the pressure present inside the coil with fans operating at the maximum velocity, differs from the fresh air temperature by
some 7-10°C; also check that the equivalent temperature of the refrigerant gas, as measured at the pressure present inside
the plate heat exchanger, differs from the water temperature going out of the exchanger by some 3-5°C.
