SIEMENS SQN 30/31 251A2700 AIR DAMPER MOTOR
MANUAL RELEASE
SWITCH
1
ADJUSTING THE MAXIMUM CAPACITY OF THE BURNER
Position the selector, situated on the control panel, on position maximum power and proceed as follows:
Adjusting the maximum gas flow rate: - proceed as stated in the regulating the solenoid valves until you achieve the
correct gas flow, as established by analyzing the combustion process. Eventually adjust the gas flow rate using a suitable
allen wrench, alter the position of the cam(3) guide blade; if you screw it down, the flow rate is reduced; if you unscrew
it, the flow rate increases.
Adjusting the maximum air flow rate: Eventually adjust this position acting on the screw "1 ", after loosening nut " 2
".
"2"
Tighten the nut
in place once again
ADJUSTING THE MINIMUM CAPACITY OF THE BURNER
Position the selector, situated on the control panel, on position minimum power and proceed as follows:
Adjusting the minimum gas flow rate: using a suitable Allen wrench, alter the position of the cam(3) guide blade; if
you screw it down, the flow rate is reduced; if you unscrew it, the flow rate increases.
Adjusting the minimum air flow rate: adjust on limit switch for air damper "Low Flame" position adjustment.
ADJUSTING THE INTERMEDIATE BURNER CAPACITIES
Using the selector, start the servomotor (closing or opening) and position on 0 to stop the stroke; the adjustment is
made as outlined below. Repeat the operation for the other cam points.
Adjusting the intermediate gas flow rates: using a suitable Allen wrench, alter the position of the cam(3) guide blade; if
you screw it down, the flow rate is reduced; if you unscrew it, the flow rate increases.
ADJUSTEMENT OF THE COMBUSTION AIR
Remove cover to gain access to the adjusting cams.The cams are to be adjusted
through the suitable key provided for. Description:
I
- Limit switch for air damper "High Flame" position adjustment
(Max. power)
II - Limit switch for the air damper position at burner's shut down
III - Limit switch for air damper "Low Flame" position adjustment
(Min. power)
V - Limit switch "NOT USED".
AIR ADJUSTMENT
2
.
420010239602 Multicalor 45 ÷ 140 PR/PR
3
AUTO = automatic operation
17
SELECTOR
AUTO
0
0 = operating elements locked
in an intermediate position
= operation on maximum capacity
= operation on minimum capacity
EN