CTA Report, Draft 1, ISP Review - US Chemical Safety and Hazard ...
CTA Report, Draft 1, ISP Review - US Chemical Safety and Hazard ...
CTA Report, Draft 1, ISP Review - US Chemical Safety and Hazard ...
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C.1 Findings<br />
1. The temperature controller memory was erased due to loss of power in the facility <strong>and</strong> failure of the<br />
backup battery.<br />
2. The natural gas regulator for the oven 405 burner (Eclipse) had a measured output pressure of 11<br />
inches of water column. The burner’s fixed gas butterfly valve was set at 80 to 90 percent closed to<br />
reduce gas input. Recorded burner flow rates would give a heat rate of approximately 210,000 British<br />
thermal units per hour (Btu/hr).<br />
3. All timers in the burner control panel were found at their minimum settings.<br />
4. The audible alarm mounted to the cabinet door of the burner control box was not connected.<br />
5. The high gas pressure cutoff switch was set at 5 psi.<br />
6. The normally open solenoid gas bleed valve had a 0.7 liter per minute (L/min) leak-through rate when<br />
energized.<br />
7. The electronics for the oil pump control box were mounted on a plywood base plate. Several<br />
knockouts <strong>and</strong> feed troughs were not adequately covered or strain-relieved. The intended dustproof<br />
National Electrical Manufacturers Association (NEMA) ratings of the burner control boxes would not<br />
be met under observed conditions.<br />
8. The burner 405 oil pump was found to have no abnormalities beyond damage that can be attributed to<br />
excessive external heat.<br />
9. No significant external gas leaks (into the building) were found.<br />
10. All components found on the subject controller were consistent with a Type I-535, manufactured<br />
between 1990 <strong>and</strong> 1998, except the display assembly, which was found to be a design from the Type<br />
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