Operation Mode

Table 25.   Operation mode

DISP-03

OperationMode

Function

Comments

1

normal operation

The boiler operates in normal mode and ha no alarms or manual overrides

2

continuous flow

Leading boilers which have no alarms can be in continuous flow mode. They receive the continuous flow signal from the strategy. If the leading boiler is in alarm, continuous flow will be performed by the next boiler of the sequence.

3

manual operation

The input “ManSwCond” <> 4 automatic operation

4

burner modulating stage (“ModStage”) switched off


maximum supply temperature modulating stage  exceeded the value of BST-03

5

burner basic stage (“Stage1Cmd”) switched off


- maximum return temperature “RetTemp” exceeded
 the value of “RetTempSP” or

- maximum supply temperature stage 1”SupplyTemp”
 exceeded the value of BST-01

6

valve end switch failure

The valve end switch alarm occurs if an end switch is connected and does not give a feedback after 600 seconds after the valve was opened for 100%.

7

pump off alarm

Stop the boiler due to pump alarm at the input ”PumpAlarm”

8

boiler common failure

Alarm at one of the inputs “BurnerAlarm” or “AlarmIn”