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Commissioning
i
6.7 Setting the gas flow rate CO
2
(O
2
) and measurement of NOx/CO content in the
flue gas (flue gas measurement)
TorxT40, screwdriver, size 5 and/or allen key 4 mm
The Honeywell multiple actuator allows measuring the inlet pressure on
meas uring nipple
A.
A
Measuring nipple gas inlet pressure
B
Measuring nipple gas outlet pressure
C
Gas choke
D
Offset screw
Flow setting operation:
To set the flow on the venturi, both flue gas values need to be controlled.
e.g.: Set upper value - control lower value - value incorrect - set lower value
- control upper value - ...
Press the emission monitoring key.
i
After 20 min. the controller switches over to normal operation
automatically.
Position the emission monitor in the flue gas duct.
Set the boiler to maximum output (100%).
Set the CO
2
(O
2
) value by turning the choke screw
C
.
i
The content in the flue gas must be between
CO
2
= 8.5 - 8.8 (O
2
= 5,9 - 5,5) vol% (dry).
Set the boiler to minimum output (1%).
Set the CO
2
(O
2
) value by turning the choke screw
D
.
i
The content in the flue gas must be between
CO
2
= 8.5 - 8.8 (O
2
= 5,9 - 5,5) vol% (dry).
Measurement of NOx and CO content. The measured values must meet the
limiting values prescribed by the regulations. Values exceeding these reference
values are an indication of faulty burner setting, gas burner or heat exchanger
contamination or gas burner defect.
If the limiting values prescribed by the regulations are exceeded, the boiler
must be put out of operation and the corresponding measures for repair work
must be initiated.
Press the emission monitoring key.
A
B
C
D
