Unigas C85A Manual Of Installation - Use - Maintenance page 29

Progressive burners
Once the procedure till step 8 described is accomplished, go on as follows:
set the low flame cam matching the high flame cam;

set the TAB thermostat to the minimum in order that the actuator moves progressively towards the low flame position;

The manual air damper control is not provided on these actuators. The adjustments must be carried out acting manually on the

cams.
Versione LME22

Berger STA12B3.41 (progressive and fully modulating burners)
MV
ST2
ST1
ST0
For DUNGS MB-DLE / Siemens VGD gas valves
High flame position (set to 90°)
Low flame and ignition position
Stand-by position (set to 0°)
Not used
Versione LGK16-SQM40

MAN-AUTO
move the low flame cam to the minimum to move the actuator towards the low flame until the two bearings find the adjusting screw

that refers to the lower position: screw V to increase the rate, unscrew to decrease.
SC
Move again the low flame cam towards the minimum to meet the next screw on the adjusting cam and repeat the previous step; go

on this way as to reach the desired low flame point.
Actuator camsBerger
SV SV
Siemens SQN72.4A4Axx (progressive and fully modulating burners)
IV
III
II
I
Siemens SQN72
STA
ST2
ST1
ST0
MV
Siemens SQM40
mensions
Dimensions in
VI VI Actuator cams (SQM40)
SQM4...
I
V V
II
IV IV
III
IV
III III
V
II II
VI
I I
V
ID
29
I ( )
red
III ( )
orange
II ( )
blue
IV ( )
black
High flame
Stand-by
Low flame - gas
Low flame - oil
Ignition - oil
Ignition - gas
Gas butterfly valve clo
Gas butterfly valve open
PART III: OPERATION
AUTO/MAN
s
ed