Boiler common failure

When a boiler common failure at one of the inputs “AlarmIn” or “BurnerAlarm” occurs:

Parameter SYS-07

Stage1Cmd

Stage2Cmd

0

switches off

switches off

1

S tays in the position before alarm. Switches off when the alarm return to normal

Stays in the position before alarm. Switches off when the alarm return to normal


A boiler common failure can be anything, for instance: flame failure, lack of air, low water level, high chimney temperature, chimney draught failure and so on.

In general, these failures will block themselves and must be reset at the equipment hardware itself.

These alarms will be reset automatically, since the hardware inputs have to reset and there is no need for another manual reset.

Anyway a reset via the input “Reset” will additionally rest these alarms too.


When the boiler common inputs return both to normal, the boilers will switch off  and will switch on again only if the strategy requests another heat generator.

Table 13.   Parameter List

Description

Value Range

Default Value

Unit

SYS-07: switch off boiler stages at alarm

0 = switch stages off

1 = keep stages on at alarm

0 /1

0

-