pag.19
LB 509
BLU 1700.1 - 2000.1 PR / MD
B
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 increa-
se 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 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; coun-
terclockwise to increase. At the end tighten the locking nut.
2,5
5
10
15
50
2
5
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
AUTO
1 - fuse
2 - termal lock-out lamp
3 - cover
4 - working lamp
5 - cover
6 - main switch I / O
7 - reset key
8 - selector
0
I
1
2
6
3
5
4
7
0
AUTO
AUTO
8
AUTO
AUTO
DESCRIPTION OF THE CONTROL PANEL OF THE BURNER
PGM
EXIT
A
B
F
C
E
D
G
0
AUTO
0
I
K6
RWF 40
PGM
PGM
EXIT
EXIT
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 - Modulating unit RWF 40
F - main switch I / O
G - reset key
AUTO
PGM
EXIT
PGM
EXIT
AUTO
Blu 1700.1 - 2000.1 MD
Blu 1700.1 - 2000.1 PR
IONIZATION CURRENT
1
min. 1,5
µ
A
50
µ
A
SATRONIC DMG 972
LANDIS & STAEFA
1
LGB21-LGB22 min. 3
µ
A
LMG21-LMG22 min. 2
µ
A
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 (1,5 µA
Satronic).
Содержание BLU 1700.1 MD
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