Page 156

NORA Oilheat Technicians Manual

drops and repeat. This should be used only as a stopgap procedure until you can obtain new potassium hydroxide (KOH) fluid. E. If the fluid must be The analyzer fluid is hazardous. Always follow the manufacturer’s cautions for safe handling. changed, refill kits are available and a spare should always be kept on hand. This kit includes fluid, gasket, screws, and filter yarn for the pump. To change the fluid: (1) Remove four screws in top of analyzer. (2) Remove top and discard fluid and rubber gasket (do not spill fluid, it is harmful to hands, paint, etc.) (3) Clean unit using soap and water. (4) Pour in full bottle of new fluid. (5) Install new rubber gasket cover, and new screws. Tighten screws evenly. The filter yarn in the sampling pump must also be changed. This filter yarn may be changed more often than the fluid to provide easy sampling pump operation. F. The analyzer should be stored in an upright position with the valve on top to prevent any possible fluid leakage. When placing the analyzer in the carrying case, it should be placed with its valve toward the handle side of the case. Extensive storage in warm places such as car trunks during summer should be avoided. The fluid should be checked for strength following long storage periods. 3. Oxygen (O2 analyzers) Measuring the oxygen content of the surrounding air can check the accuracy of oxygen sensors. When fresh air is drawn through the instrument, a reading of 20.9 percent O2 should be observed. The instrument should be adjusted to this value. If you cannot get a 20.9% reading, replace the oxygen sensor. 4. Stack temperature gauge A. Other than checking for obvious damage, the only problem that might occur with a temperature gauge is a bent stem. The gauge will not read accurately with a bent stem. B. Many manual and electronic temperature instruments can be checked in boiling water (212ºF), and readjusted if needed. 5. Draft gauge A. Check to be sure the indicator needle moves freely. This can be done by blowing lightly across, and then toward, the end of the sampling tube. The needle should move smoothly and return accurately to the zero setting position. B. The draft gauge should be checked against an accurate manometer at least once a year. 6. Electronic analyzer calibration All manufacturer instructions concerning equipment care and maintenance must be followed carefully. Oxygen cells, batteries, and calibration of the instrument must be done as needed to assure accurate readings. Electronic analyzers should be sent back to the manufacturer for calibration as required by the manufacturer. This will insure accuracy of the sensors in the analyzer. Chapter 7 Combustion WARNING: 7-30 Combustion


NORA Oilheat Technicians Manual
To see the actual publication please follow the link above