First Start-Up - Riello BS2/M TL Manuel D'entretien

5.4

FIRST START-UP,

Once you have made sure wiring is correct, and checked hydraulic connections
for leaks, set the air pressure switch to the minimum value.
Connect the pressure gauge to the gas pressure test point at the burner head
(M3, fig. 7 page 7).
The following table gives start-up settings with reference to a burner fuelled
with methane gas.
Reference values are:
– firing power;
– air damper preset position (CAM III);
– preset position of gas train POINT 0 setting screw;
– the model of gas train to be used.
Firing power
TYPE
kW

916M 26 33

917M 48 83

918M 68 110

917M 48 83

918M 68 110
Set to values close to start of scale (-1.5).

1 - Depending on required maximum output, adjust the combustion head as indicated on page 10.
2 - Select manual operating mode "MAN" and calibrate the servomotor's CAM III and adjust the 0 POINT
setting screw as indicated in the table, then start the burner.
3 - Once it has fired, move the servomotor by hand towards the second flame position by pressing switch
(+). During this operation, check flame stability: if it looks unstable, adjust the GAS/AIR RATIO setting
screw to increase or decrease the setting until you reach the maximum desired output and correct
CO values for fumes. Next, set CAM I to the value reached by the servomotor.
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4 - Move the servomotor by hand towards the first flame position by pressing switch (-).
Check combustion and, where necessary, use the 0 POINT setting screw only to achieve correct CO
values for fumes.
5 - If first flame output needs altering, adjust CAM III.
All 0 POINT setting screw adjustments will also cause the maximum gas delivery to be varied.
6 - Return the servomotor to maximum opening and check maximum output again, adjusting with the GAS/
AIR RATIO setting screw.
7 - Turn the servomotor to first flame position again and adjust output again, adjusting with the 0 POINT
setting screw only.
8 - Repeat steps (6) and (7) until GAS/AIR RATIO and 0 POINT setting screws no longer need adjusting.
9 - Check combustion values at intermediate output and, where necessary, adjust further with GAS/AIR
RATIO and 0 POINT setting screws.
Once you have done, and have made sure the burner features good firing and good flame stability, se-
lect automatic mode by setting the selector to "AUT". modulation will occur between the setting posi-
tion of CAM III and that of CAM I.
3134
(see fig. 13 and fig. 5 page 6)
Adjustment Adjustment
CAM III 0 POINT
Set point Set point

20° 30°

30° 40°

30° 35°

30° 40° 0.1

30° 35° -0.7
Adjustment
GAS/AIR RATIO
Set point

Depends on maximum

output


0.25
Depends on maximum
output

-0.5
12 GB
Fig. 13
+
AUT
-
MAN
D4468
GAS TRAIN
Model
CG 120
CG 220
CG 220
MBC - 300 - VEF
MBC - 700 - VEF
2