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DESCRIPTION OF THE PARAMETERS
Parameter 26 (2FA/32794):
Number of hall impulses per revolution
The value set under this parameter determines how many impulses per revolution of the fan are returned to the
automatic firing device. The value is dependant on the used fan.
Parameter 27 (2FF/32795):
Fan speed during the first period of pre-venting
The pre-venting phase is divided into two periods. In the first period, the fan speed set here operates for 25 seconds.
See functional drawing 3.
Parameter 28 (2FG/32796):
Fan speed at start
In the second period of the pre-venting phase, which also lasts 25 seconds, the fan operates at the speed set here,
and at the end of this period, the burner ignites. See functional drawing 3.
Parameter 29 (2FH/32797):
Maximum fan speed
This parameter defines the maximum speed of the fan.
Parameter 30 (2FI/32798):
Minimum fan speed
This parameter defines the minimum speed of the fan.
Gas pressure
External gas
solenoid
valve/ LGP
Burner fan
Int. Ignition
Gas sole noid
valve
Flame
t
Par.39
25 s
50 s
5 s
4 s
5 s
30 s
25 s
50 s
5 s
4 s
5 s
10 s
Par.48
Par.37
Example:
False start
Example:
Successful start
Modulating
operation
Switch-
off
Time
Ext. Ignition
Functional drawing 3
Status
