14
EN
420010331102
M ulticalor 45 ÷ 140 AB/AB
ADJUSTMENT OF GAS MINIMUM PRESSURE SWITCH
Unscrew off and remove cover M. - Set regulator N to a value equal to 60%
of gas nominal feed pressure (i.e. for nat. gas nom. pressure = 20 mbar, set
regulator to a value of 12 mbar; for L.P.G. nom. pressure of G30/G31-
30/37 mbar, set regulator to a value of 18 mbar).Screw up cover M
ADJUSTMENT OF THE AIR PRESSURE SWITCH
Unscrew screws A and B and remove cover C.- Set the pressure switch to the
minimum by turning regulator D to position 1.
- Start the burner and keep in low flame running, while checking that com-
bustion is correct. Through a small cardboard, progressively obstruct the air
intake until to obtain a CO2 increase of 0,5÷0,8% or else, if a pressure
gauge is available, connected to pressure port E, until reaching a pressure
drop of 1mbar (10 mm of W.G.). - Slowly increase the adjustment value of
the air pressure switch until to have the burner lockout. Remove the
obstruction from the air intake, screw on the cover C and start the burner by
pressing the control box rearm button.
Note: The pressure measured at pressure port E must be within the limits
of the pressure switch working range. If not, loose the locking nut of screw
F and gradually turn the same: clockwise to reduce the pressure; counterclockwise to increase. At the end tighten
the locking nut.
2,5
5
10
15
50
25
35
30
40
45
20
0,4
0,6
0,9
3,0
1,5
2,1
1,8
2,4
2,7
1,2
I
L
M
N
A
B
C
D
E
F
G
H
ADJUSTEMENT OF THE COMBUSTION AIR
LANDIS & STAEFA SQN 30 151A2700 AIR DAMPER MOTOR
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 for 2nd stage’s solenoid valve opening release
NOTE :
Cam V (to allow the 2nd stage’s solenoid valve opening) must be
adjusted to an intermediate position between the Low and High Flame
ones (to an angle approximately 5° greater than the low flame position).
MANUAL RELEASE
SWITCH
GAS TRAIN INSTALLATION AND SETTING INSTRUCTIONS
Fix the gas train to burner body by means of the 4 screws of the flange, pay attention to set correctly the gasket ( O-
ring ).
Connect electrically the gas train with the 6 pole plug.
Switch on the burner (it has already been tested in the factory, so it is pre set on average values) and verify the tightness
of gas train connections made during installation.
Act as follows to adapt the burner output to the boiler.
HIGH FLAME
1. Bring the burner in high flame , air inlet must be set at 75 ° (maximum opening position).
To adjust air capacity operate on the combustion head position.
Just in peculiar case it is necessary to reduce the air flow in high flame closing air intake damper.
2. The position of gas butterfly valve must be lower then 90° ( typically 85°. It is important not get over 90° to obtain
a perfect combustion during passage from high to low flame). Eventually adjust this position acting on the screw “1 “,
after loosening nut “ 2 “.
