40
Figure 23: HSG Gas Train Assembly (INDIVIDUAL PARTS ONLY SOLD SEPARATELY.
REFERENCE SECTION VI FOR PART NUMBERS)
Figure 24: MOTOR/BLOWER ASSEMBLY
TROUBLESHOOTING GUIDE
Nuisance Lockouts/Flame Sensing Problems –HSG200 & HSG400 Gas Burners
Wayne’s HSG series direct spark ignition (DSI) gas burners prove flame through the process of flame
rectification. Flame rectification is achieved by the ignition control as it places a small voltage on the flame
sensor. When the flame sensor is surrounded by flame, the voltage on the flame sensor “leaks” to ground
through the flame, resulting in an electrical current. This current is interpreted by the ignition control as the
presence of flame.
One of the most common problems with gas appliances utilizing this type of electronic flame sensing
system is the “nuisance lockout”. Lockouts are not generally due to the burner failing to ignite, but rather
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