Boiler and pilot system

Abstract

A pilot and burner assembly includes a burner assembly and a blower for supplying combustion air to the burner assembly. The system further includes a pilot assembly and a fuel supply for providing fuel to the pilot assembly. A pilot fan provides pilot air to the pilot assembly, the pilot fan being separate from the blower and provides air only to the pilot assembly.

1 . A pilot and burner assembly, comprising:
 a burner assembly;   a blower supplying combustion air to said burner assembly;   a pilot assembly;   a fuel supply providing fuel to said pilot assembly; and   a pilot fan providing pilot air to said pilot assembly, wherein said pilot fan is separate from said blower and provides air only to said pilot assembly.   
     
     
         2 . The pilot and burner assembly of  claim 1 , further comprising:
 a fuel valve assembly positioned between said fuel supply and said pilot assembly, said fuel valve assembly permitting only unidirectional flow of said fuel into said pilot assembly.   
     
     
         3 . The pilot and burner assembly of  claim 1 , wherein:
 said pilot assembly includes a pilot tube, said pilot tube accepting a mixture of said fuel from said fuel supply and said air from said pilot fan; and   a flame disc positioned in fluid communication with said pilot tube, said flame disc containing apertures so as to create turbulence in said fuel and air mixture.   
     
     
         4 . The pilot and burner assembly of  claim 4 , further comprising:
 an electrode positioned downstream of said flame disc, said electrode being controllable to ignite said mixture.   
     
     
         5 . The pilot and burner assembly of  claim 2 , further comprising:
 an air valve assembly positioned between said pilot fan and said pilot assembly, said air valve assembly permitting only unidirectional flow of said pilot air into said pilot assembly.   
     
     
         6 . The pilot and burner assembly of  claim 5 , further comprising:
 a pressure switch assembly operably connected between said fuel valve assembly and said air valve assembly, said pressure switch assembly triggering actuation of said fuel valve assembly when said air valve assembly is actuated.   
     
     
         7 . A pilot and burner assembly, comprising:
 a burner assembly;   a blower supplying combustion air to said burner assembly;   a pilot assembly;   a fuel supply providing fuel to said pilot assembly;   a pilot fan providing pilot air to said pilot assembly;   said pilot assembly including a pilot tube, said pilot tube accepting a mixture of said fuel from said fuel supply and said air from said pilot fan; and   a flame disc positioned in fluid communication with said pilot tube, said flame disc containing apertures so as to create turbulence in said fuel and air mixture.   
     
     
         8 . The pilot and burner assembly of  claim 7 , further comprising:
 a fuel valve assembly positioned between said fuel supply and said pilot assembly, said fuel valve assembly permitting only unidirectional flow of said fuel into said pilot assembly.   
     
     
         9 . The pilot and burner assembly of  claim 1 , wherein:
 said pilot fan is separate from said blower and provides air only to said pilot assembly.   
     
     
         10 . The pilot and burner assembly of  claim 7 , further comprising:
 an electrode positioned downstream of said flame disc, said electrode being controllable to ignite said mixture.   
     
     
         11 . The pilot and burner assembly of  claim 8 , further comprising:
 an air valve assembly positioned between said pilot fan and said pilot assembly, said air valve assembly permitting only unidirectional flow of said pilot air into said pilot assembly.   
     
     
         12 . The pilot and burner assembly of  claim 11 , further comprising:
 a pressure switch assembly operably connected between said fuel valve assembly and said air valve assembly, said pressure switch assembly triggering actuation of said fuel valve assembly when said air valve assembly is actuated.   
     
     
         13 . A method for controlling operation of a pilot and burner assembly, said method comprising the steps of:
 providing a burner assembly;   supplying combustion air to said burner assembly via a blower;   providing a pilot assembly;   providing fuel to said pilot assembly via a fuel supply;   providing pilot air to said pilot assembly via a pilot fan, wherein said pilot fan is separate from said blower and provides air only to said pilot assembly.   
     
     
         14 . The method for controlling operation of a pilot and burner assembly in accordance with  claim 1 , further comprising the steps of:
 positioning a fuel valve assembly between said fuel supply and said pilot assembly, said fuel valve assembly permitting only unidirectional flow of said fuel into said pilot assembly.   
     
     
         15 . The method for controlling operation of a pilot and burner assembly in accordance with  claim 1 , further comprising the steps of:
 including a pilot tube in said pilot assembly, said pilot tube accepting a mixture of said fuel from said fuel supply and said air from said pilot fan;   positioning a flame disc in fluid communication with said pilot tube; and   forming apertures in said flame disc so as to create turbulence in said fuel and air mixture.   
     
     
         16 . The method for controlling operation of a pilot and burner assembly in accordance with  claim 15 , further comprising the steps of:
 positioning an electrode downstream of said flame disc, said electrode being controllable to ignite said mixture.   
     
     
         17 . The method for controlling operation of a pilot and burner assembly in accordance with  claim 14 , further comprising the steps of:
 positioning an air valve assembly between said pilot fan and said pilot assembly, said air valve assembly permitting only unidirectional flow of said pilot air into said pilot assembly.   
     
     
         18 . The method for controlling operation of a pilot and burner assembly in accordance with  claim 17 , further comprising the steps of:
 operably connecting a pressure switch assembly between said fuel valve assembly and said air valve assembly, said pressure switch assembly triggering actuation of said fuel valve assembly when said air valve assembly is actuated.