1.1.2 Operating switches
Mode selector switch
Selector switch
1 2 1
1 2
1 2
2 O
Automatic mode with switchover between
day mode and night mode
Automatic mode with switchover between
day mode and stand-by mode
Day mode (rated operation)
Night mode (reduced operation)
Manual/maintenance mode
Stand-by mode
Boiler 1 and 2 in operation;
automatic lag/lead sequence change
Boiler 1 in operation,
Boiler 2 switched off
Boiler 2 in operation,
Boiler 1 switched off
Boiler 1 and 2 switched off
Boiler 1 and 2 in operation;
Boiler 2 as lead boiler
Boiler 1 and 2 in operation;
Boiler 1 as lead boiler
Operation
7
EB 5474 EN