Valve closed alarm

If the valve end switch is connected at the universal input “ValveEndSwitch" of this macro, a valve closed alarm can be generated at the output ”VESFailure”.

If the butterfly valve opens and the valve end-switch does not close after the fixed delay time of 600 seconds, the alarm will be generated.

During a valve end witch alarm, the valve output will stay open.

The default value at this input is “999”, which means that the end-switch is not connected.

You can connect the digital input of the valve end switch to this input without receiving a mismatch alarm.

The alarm reset depends on the parameter SYS-06, which will reset the alarm manually by default.

In case of manual reset, the alarm must be reset via the input “Reset” by pushing the reset button. When a ”VESFailure” alarm occurs the boiler and the pump will be switched off and an alarm is sent to the heating control strategy, in order to enable the next boiler.

Table 14.   Parameter List

Description

Value Range

Default Value

Unit

SYS-06: automatic/ manual reset

0 = auto

1 = manual

0 /1

1

-