73
2
1
3
4
5
CALIBRATION AND SETTING UP
Legend
1
Ratio
V
2
Ratio
N
3 PL
Air pressure check point
4 PBr
Gas pressure check point
5 PF
Combustion chamber pressure check point
Ensure that there are no leaks from the gas ramp.
-
start the burner at the maximum flow-rate;
-
to insert a gauge for the measure of the pressure of the gas to the head of the burner;
-
measure the CO
2
in the fumes, adjusting the GAS-AIR ratio
V
via screw
1
;
-
check the counter to see whether the flow-rate is as required: to adjust the quality of gas act on the air gate
servo control with small movements of the red cam until you obtain the desired flow-rate;
-
once you have obtained the desired flow-rate repeat the combustion test and, if necessary fine-tune the
GAS-AIR ratio
V
by acting on screw
1
;
-
bring the burner to the 1
st
stage position or minimum flow-rate (by adjusting the orange cam) and check
combustion by acting on
N
via screw
2
.
-
re-check combustion at maximum flow-rate and various intermediate flow-rates as the burner is designed
for continuous modulation.