EVCO c-pro nano NAV - Manual (Page 28)

C-PRO NANO AND MICRO NAV APPLICATION MANUAL
Page 28
6.8 Condenser and evaporator alarms
The following controls check the temperature of the gas in the condensation and evaporation heat
exchangers and detect the alarm conditions, which determine compressor block.
The alarms are active also with the compressor off.
6.8.1 Summer condensation high temperature alarm
The following figure shows the behaviour on the condenser in the case of summed functioning
(chiller). On the basis of the input gas temperature at the AI3 condenser, the alarm is activated
above the set-point and deactivated after a differential below the set-point.
6.8.2 Summer evaporation low temperature alarm
The following figure shows the behaviour on the evaporator in the case of summed functioning
(chiller). On the basis of the output gas temperature at the AI4 condenser, the alarm is activated
below the set-point and deactivated after a differential over the set-point.
6.8.3 Winter condensation low temperature alarm
The following figure shows the behaviour on the condenser in the case of winter functioning (heat
pump). On the basis of the input gas temperature at the AI3 condenser, the alarm is activated below
the set-point and deactivated after a differential over the set-point.
AT2
ON
SET2 SET2 +
Gas temperature
at evaporator output
AT1
ON
SET1 SET1 -
Gas temperature
at condenser input