49
meaning of microswitches SW2
Some boiler settings can be changed by changing the sequence of the micro switches on the SW2 bank according to
the following table:
Nr.
Bank SW2
1 OFF
Discontinuous combustion
ON
Continuous combustion
2 OFF
Not in use
ON
Not in use
3 OFF
Not in use
ON
Not in use
4 OFF
Normal
combustion
OFF
Forced
combustion
min
ON
Forced
combustion
partial load
ON
Forced
combustion
max
5 OFF
ON
OFF
ON
6 OFF
Normal operation mode
ON
Microswitch setting change enabled
7 OFF
ON
8 OFF
Not in use
ON
Not in use
For safety reasons, the electronic card accepts the changes of the microswitches one, four and
five only if the six and seven microswitches (ON) are enabled in advance; otherwise, the card
ignores any change in the microswitches, interpreting the displacement as accidental, involuntary.
At the end of the operations it is necessary:
•
verify that the microswitches four and five are in ‘OFF position’;
•
set the microswitches number six and seven back to OFF position.
To preserve the boiler and for safety reasons, after two hours from their activation, the forced-
mode combustion settings are ignored and the boiler returns to normal combustion operation.
IMPORTANT
