RG66001652_REV.02
31
LCW - LCR
MAXIMUM PRESSURE SWITCH
The high pressure switch stops the compressor when the outlet pressure exceeds the set value.
Warning: do not attempt to change the setting of the maximum pressure switch. Should
the latter fail to trip in the event of a pressure increase, the pressure relief valve will
open.
The high pressure switch must be
manually reset
; this is possible only when the pressure falls below the
set differential (see Table III).
MINIMUM PRESSURE SWITCH
The low pressure switch stops the compressor when the intake pressure falls below the set value for
more than 120 seconds.
The switch is automatically reset when the pressure rises above the set differential (see Table III).
SERVICE THERMOSTAT
This device permits to enable and disable the compressors' operation as a function of the reading of the
inlet water temperature of the chilling unit [return from the system]. For further details, refer to the
microprocessor control section in the manual.
ANTIFREEZE THERMOSTAT
The antifreeze probe is located at the evaporator outlet and stops the compressor when the temperature
goes below the set limit value. Together with the flow switch and low pressure switch, this device protects
the evaporator from the risk of freezing as a result of faults in the water circuit. For further details, refer to
the microprocessor control section in the manual.
ANTI-RECYCLE TIMER
The function of the timer is to prevent excessively frequent compressor starts and stops. This device
imposes a minimum time lapse of 480 seconds between two compressor starts. For further details. refer
to the microprocessor control section in the manual.
Never attempt to change the delay set in the factory: wrong settings could cause serious
damage to the unit.
