4979 North American Oven Zephyr Gas Burners
Sheet 4979-1
FEATURES
• 15 to 1 turndown--modulating over entire range
• Low gas pressure required--only 3"w.c. higher than duct pressure
• Wide range of sizes available to fit any duct
• All metal construction--no refractory
• Easily installed in any position
• Use air from duct--no combustion air blower required
• High inout/low unit cost--1 000 000 Btu/h HHV per lineal foot
• For air heaters and recirculating ovens
4979 Oven Zephyrs are continuous flame gas burners for direct-fired recirculating air heaters and ovens. Duct air is used for combustion--no separate combustion blower is required. The Oven Zephyr's high turndown characteristics (15 to 1) allow precise temperature control of recirculating air. The flame is predominantly blue and cannot flash back because gas alone is delivered to the burner. Each lineal foot of burner has a heat release of 1 000 000 Btu/hr. This exceptionally high rating lowers installation cost by keeping burner lengths to a minimum. Fresh air must be present to maintain stable combustion. Com- bustion air is supplied from the duct air stream. The percentage of make-up air required varies with the temper-ature rise across the burner--see Table 1. Recirculating air applications involving moisture removal should be referred to Fives home office for evaluation.
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