1) Combustion head
2) Gasket
3) Burner mounting flange
20
4) Gas train
5) Air/gas regulation modulator
6) Air pressure switch
7) Electrical panel
19
8) Gas butterfly valve
9) Hinge
10) Screw for adjusting air supply to combustion head
11) Fan motor
12) Minimum gas pressure switch
13) Valve seal check pressure switch
15) 4 pole plug
17) 7 pole plug
18) Thermal relay
19) Synoptic panel
20) Ignition transformer
21) Motor contactor
18
17
15
21
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