Condenser Pump Mismatch Alarm

For this function, it is necessary to connect the number of operating condenser pumps from the condenser pump sequencer module (SQA) to the input “OperCdPump”. When chiller condenser pump is commanded on, then the number of requesting condenser pumps is increased by the output “ReqCdPump”. A condenser pump mismatch alarm is generated if the number of “ReqCdPump” is greater than the number of operating condenser pumps and the delay defined by ALM-02 has expired. The chiller unavailable flag is set (chiller common alarm output) and the chiller shutdown sequence is started.

The condenser valve alarm is displayed by DISP-02.

The alarm must be reset (manually or automatically) in order to start-up the chiller again.

Table 5.   Condenser pump mismatch alarm behaviour

ALM-02

Condenser pump mismatch alarm behaviour

>0

If the number of requesting condenser pumps is greater than the number of operating condenser pumps, after alarm status delay has expired

= 0

No monitoring is done and no alarms are generated


Table 6.   Parameter List

Description

Value Range

Default Value

Unit

ALM-02: alarm delay condenser pump; 0=disable

0...3600

0

sec

DISP-02: condenser pump alarm

0/ 1

0

-