Position Of Electrodes; Ionization Current - Ecoflam BLU 1700.1 PR Manual De Instrucciones

420010288702 BLU 1700. 1 PR - BLU 2000. 1 PR
EN
The firing head position adjustment is made in order to obtain the best combustion efficiency. When used with mini-
mum outputs the firing head is adjusted in rear position. With high output, the firing head is adjusted in forward posi-
tion. Adjustment: - Loosen screw A through a suitable Allen key. - By a screwdriver act on the hex. head screw B until
is reached the desired position. - Tighten screw A
+
– B
Ionization probe
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 pressure port E,
until reaching a pressure drop of 1 mbar (10 mm of W.G.). - Slowly increase the adjust-
ment 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; coun-
terclockwise 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.
SETTING THE FIRING HEAD
A
--
+

POSITION OF ELECTRODES

Ignition electrode

IONIZATION CURRENT

14
REMOVING THE BLAST TUBE
+ 1
4
0
+ 1
1 4
0
1 6
M
I
L
C
A
B
LGB21-LGB22 min. 3 μA
LMG21-LMG22 min. 2 μA
1
LANDIS & STAEFA
N
D
H
G
E
F