The Graph above depicts the relationships of air exchange to time and CO ppm with cubic feet area and
percent CO emissions remaining constant.
Based on the CO production rates shown above the TW A would not be exceeded in a 100 x 750 x 10
foot (empty) space after 8 hours with 2 air changes per hour. (Assumes no additional CO exposure during
8 hour time period)
Maintenance of Equipment
Warning - The proper maintenance of equipment is vital to safe operation. LPG engines are
dependent on engine tune up, and air filter replacement CO concentration (production) skyrockets
when the air to fuel ratio becomes fuel rich. Follow the recommended Maintenance Schedule for the
engine found in the Engine Operator/Owner Manual as well as the Maintenance And Adjustments
schedule found in the Propane Floor Equipment Operator's Manual that were supplied with the
equipment. Additional manuals may be obtained by contacting;
Onyx Engineered Products at; 1-800-858-3533 or write to: Onyx Engineered Products,
137 Cross
Center Dr., Ste. 246, Denver, NC 28037
CO Safety Equipment Available
• Three-way type catalytic converter to scrub CO, Hydro Carbons (HC), and Nitrous Oxide (NOx) from
the engine exhaust providing the lowest possible emissions
• High cubic feet per minute (PM) fans (forced air mixing)
• Digital combustion analyzers for tail pipe emissions monitoring
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