SAFE SHUTDOWN TESTS
LIMIT ACTION
With the burner operating, lower the high limit setting to simulate an overheated boiler. Normal shut- down should occur. Restore the normal limit setting, and the burner should restart.
FLAME FAILURE
With burner operating, close the manual fuel valves to simulate a flame failure. System should lock out after safety switch timing (15 seconds). After the safety switch has cooled, open the manual valves (relight standing pilots) and reset the safety switch; the burner should restart.
INSPECTION PROCEDURES
BURNERS
Clean main burners and air louvers of dust, lint and debris. Keep boiler area clear and free from combus- tibles and flammable liquids. Do not obstruct the flow of combustion and ventilating air. Make visual check of burner and pilot flame. Yellow flame indicates clogging of air openings. Lifting or blowing flame indicates high gas pressure. Low flame indicates low gas pressure.
Fig. #8964
PILOT BURNER FLAME (STG PILOT UNITS)
NORMAL INSPECTION PROCEDURES
First and third month after initial start up and then on an annual basis. If problems are found, refer to Trouble Shooting Guide for additional directions.
1.Remove top of boiler and inspect heat exchanger for soot and examine venting system.
2.Remove rear header and inspect for scale depos- its.
*3. Inspect pilot and main burner flame and firing rate.
*4. Inspect and operate all controls and gas valve.
*5. Visually inspect system for water leaks.
*6. Oil pump motor and bearing assembly, if oil cups are provided.
7.Check flow switch paddle.
8.Clean room air intake openings to assure adequate flow of combustion and ventilation air.
9.Keep boiler area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
*Should be checked monthly. (Takes approximately 15 minutes).
Fig. #8144
MAIN BURNER FLAME
NOTE: Modulating burner flame varies in height from approximately 1/4" at low fire to approximately 4" in high fire.
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