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2.
Commissioning and Calibration process.
There are no changes to the Commissioning and Calibration process when using the Type2 Oxygen
probe system. A card with Calibration data will be provided with every new probe in a similar way to
that for NXO2PK probe.
Refer to bulletin NEX-6101 or PPC6001 for all processes.
Commissioning Oxygen Trim
In order for the oxygen trim system to function correctly, the following information must be entered:
1.
Enter the appropriate option parameters from 30.0 to 42.6 as required.
With the burner off, enter commission mode (See section 5 of the PPC-6001 and NEX-6101
bulletins). To get the trim operational it is only necessary to address all option parameters
with the
Refer to options 30.0 thru 42.6 inclusive for details of parameters that may be entered.
2.
Flow values and O2 set points. The flow and O2 values may be entered manually by the
engineer (option 34.5), or the system can automatically calculate the values and enter them
itself by using automatic trim commissioning (option 30.9).
If the automatic trim commissioning is performed, the engineer
MUST CHECK THAT THE
VALUES ENTERED ARE VALID AND SAFE AFTER COMPLETION
. Additionally, the
oxygen probe calibration should be checked before and after the procedure since the results
depend highly upon measurements taken using the probe.
Before proceeding to enter the oxygen set points for each profile, a few points relating to the oxygen trim
option should be considered.
No trim is applied which would require a drive to move above its high fire position or below its low
fire position.
The flow for each profile position must be entered to ensure correct operation. The flow can either
be measured for each profile position or calculated as a percentage with respect to the flow at
high fire.
O 2
WARNING
Use extreme care when entering flow values and oxygen set points.
Incorrect setting of either could cause a hazardous situation to occur,
and serious injury or death could result.
If the flow values and oxygen set points have been up-loaded it is
essential that the combustion is verified at each firing position.
If using automatic oxygen trim commissioning it is the sole
responsibility of the commissioning engineer to ensure the values
calculated by the system are correct and will not cause a hazardous
condition to occur.
Once the oxygen trim is commissioned the trim flow limit must be set
to ensure a fault in the oxygen trim will not cause a hazardous
condition to occur.
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Summary of Contents for NEXUS NX6100 series
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