INTERTEK/WARNOCK HERSEY AIR FURANCE EMISSIONS AND EFFICIENCY TESTING LABORATORY OPERATING PROCEDURES pg. 6
4. With hot wire anemometer check for ambient airflow around unit (must be less than 50 ft/min). 5. Zero scale and start fire with newspaper and kindling. (Make sure stack sample probe is on the unit.) 6. Once kindling is burning well, add preload fuel. Operate at high fire for sufficient time to get fuel load burning well. Then adjust settings to intended test run levels. 7. Perform the dilution tunnel traverse as prescribed in ASTM #2515, Section 9.3. (Pitot tube should be carefully cleaned prior to each test.) 8. Pretest load must burn until the unit has cycled at least 2 times. 9. Stir fire often during preburn (after a reading) to get a good coal bed. Fire can only be raked once (door open 1 minute or less) during the 15 minutes prior to the start of the test. 10.Traverse the outlet duct velocity with a vane anemometer and enter into the spreadsheet.
D. Test Run
1. Stack gas analyzers should be on and in the sample mode. 2. When the fuel bed is between 10-20% of the test load weight the test is to be started. a. Insert the sample probes into the tunnel being careful not to hit sides of tunnel with probe tip. b. Check tunnel Pitot tube for proper position. c. Record initial readings. d. Turn on probe sample systems and start timing test. e. Tare platform scale. f. Open stove doors and load stove. Close door or follow manufacturer's start-up procedures. Five minutes is the maximum time before all doors and controls must be set to final positions for duration of test. g. Record length of time door and bypass are open, include any air control setting adjustments. h. Every 10 minutes or less record the following:
1) 2) 4) 5) 6)
Dry gas meter readings.
Weight remaining.
Tunnel Pitot tube reading.
Draft reading.
Rotometer readings.
i. Every 1 minute record the following:
1) 2) 3)
All temperature points
Water meter
Delta T thermopile
G:\Hearth\EE - Emissions and Efficiencey\Furnace solid fuel\Lab Procedures for EPA Air Furnaces 11.11.16.doc
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