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NOTE: Interference from the ignition spark can alter the true signal reading by adding to, or sub-
tracting from it. This trend sometimes may be reversed by interchanging the primary wires (line volt-
age) to the ignition transformer. This interference can also be reduced by the addition of grounded
shielding between the flame rod and ignition spark.
8.
Proven types of flame grounding adapters, as shown below, may be used to provide adequate
grounding surface. High temperature stainless steel should be used to minimized the effect of
metal oxidation. This assembly may be welded directly over the pilot or main burner nozzle.
BOMB FIN GROUNDING ASSEMBLY
THREADED ROD ASSEMBLY
