750-382
CBT
5-7
Ignition electrode
5.5 — Ignition electrode
5.5.1 — Full modulation burners
The ignition electrode should be checked on an annual basis or as needed if ignition problems are encountered.
In order to verify spacing of electrode, center the burner cylinder within the dry oven. Then attach electrode to
the dry oven with the screws provided. Verify the dimensions shown in Figure 5-5.
5.5.2 — On/off burners
The ignition transformer requires little attention other than making sure the ignition wire is firmly attached to the
transformer and the electrode. Be sure the wire insulation is in good condition and not grounded. Failure to keep
the ignition electrode clean and properly set can cause faulty operation. The electrode assembly is supported by
a socket in the diffuser and gas inlet tube. No adjustment is required except proper positioning of the electrode
wire.
!
Caution
The dimensions on the Ignition Electrode are not easily adjustable.
Bending the rods can cause damage to the insulating material. In addition, a bent
electrode will have a tendency to return to its original shape when heated. If the
electrode is out of specification, replacement is generally recommended.
0.64 GAP
FIGURE 5-5. Igniter, full modulation burner
Flame scanner
Sight glass
Ignition electrode
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