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NORA Oilheat Technicians Manual

Chapter 7 Combustion Chapter 7—Combustion 7-25 years that can reduce the time needed for oilburner testing and adjustment. Digital instruments are faster, more accurate, more reliable, and have a higher repeatability. Digital instruments stay in calibration, allow trending, allow more complex functions and save time. Digital instruments allow data to be recorded and reported without human error, and provide reliable and accurate results for you and your customers. Data can be recorded much faster than any technician could ever do the calculations. With the optional printer, the data can be recorded as an un-editable record, so the print out is what was measured at the jobsite. Permanent records allow the user to track system changes and determine if the system is operating within the design parameters or if changes have taken place. Only digital analyzers allow you to take real time tests. Study the instruction manual and take the time to learn how your analyzer works before you expect it to perform for you. Be sure to follow the manufacturer’s recommended maintenance and service procedures. Most manufacturers ask that you not expose the analyzer for extended periods of time to freezing temperatures, as this has an impact on sensor life. In the winter, do not leave the tester in a cold truck over night. The electronic combustion analyzers use advanced methods of measuring flue gas composition and temperature through a single probe. A pump within the electronic analyzer draws a flue gas sample through a series of sensors. These electronic analyzers are capable of measuring oxygen percentage (O2), carbon monoxide (CO), carbon dioxide (CO2- calculated), excess air, draft, stack and ambient temperatures and many can even determine other gases like oxides of nitrogen (NO, NO2, NOx) for advanced flue gas emissions level readings. The only thing they cannot measure is smoke. Since the electronic analyzers are sensitive to carbon build-up, to extend the life of the sensors and instrument, take smoke tests with a smoke tester, and adjust for a low smoke reading before using the electronic analyzers. The electronic analyzers eliminate the cumbersome work required by the manual test equipment and more importantly, they eliminate human error caused by varying interpretation of results we have with manual equipment. With the electronic analyzers, any two technicians will get identical results. The use of these electronic instruments also indicates to customers that you are a professional equipped with the most up-todate testing equipment. It adds to your image as an energy expert. This can assist with customer acceptance of energy conservation options, such as flame retention burners and new boilers and furnaces. Some of the electronic instruments compute efficiency and display the results on a printed readout. This can be used to demonstrate to the homeowner the actual efficiency of their boiler or furnace. This information can serve as a sales tool to identify the fuel savings that are available by installing new equipment and can also


NORA Oilheat Technicians Manual
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