US Patent:
20090317756, Dec 24, 2009
Inventors:
JAMES HOVERSON - Dallas TX, US
JAMES JAGERS - Dallas TX, US
Assignee:
MESTEK, INC. - Westfield MA
International Classification:
F23D 14/62
F24J 3/00
F23N 5/20
Abstract:
A gas burner system for a heating device includes a burner, a valve assembly for controlling a flow of fuel to the burner, a blower assembly for directing air to the burner, and a control system. The burner includes one or more burner plates for facilitating the mixture of air and fuel to be combusted in a combustion chamber. The control system is configured to independently control the valve assembly and the blower assembly according to a control profile, for generating a plurality of air/fuel mixtures each configured for operation of the burner at a different firing rate. By mapping the characteristics of both the gas valve and the combustion blower independently, the burner system is assured of operating at the proper air/fuel mixture over a very wide range of firing rates, with a turndown ratio of 30:1 or greater, and within ANSI safety and performance standards.
