Ionization Current - Ecoflam BLU 500.1 PR Manual Del Usuario

B LB1684 BLU 500.1 ÷ 1200.1 PR Low NOx
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 combustion 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 pres-
sure port E, until reaching a pressure drop of 1 mbar (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; counterclockwi-
se to increase. At the end tighten the locking nut.
With the burner switched off, connect a DC microammeter with a 0÷50 or 0÷100 µA dial. When the burner
is running, and is properly adjusted, the value read must be steady and never be smaller than 3 µA.
DESCRIPTION OF THE CONTROL PANEL OF THE BURNER
F

IONIZATION CURRENT

A
AUTO
B
0
C
D
I
E
0
pag.14
LGB21-LGB22 min. 3 µA
LMG21-LMG22 min. 2 µA
1
LANDIS & STAEFA
A - selector :
0 = operating elements locked in an
intermediate position
1 = operation on maximum capacity
2 = operation on minimum capacity
3 = automatic operation
B - working lamp
C - termal lock-out lamp
D - fuse
E - main switch I / O
F - reset key
N
M
I
L
D
C
A
G
B
F
H
E