When Replacing The Adjustable Flame Rod - CleaverBrooks CFC Operation, Service & Parts Manual

Section 5 — Service and Maintenance
ROTATIONAL
AXIAL
Adjustment
Adjustment
Figure 5-5 Flame Rod Adjustment
5-4

When replacing the adjustable flame rod:

• While holding the flame rod in position, tighten the bracket nut until you
cannot twist the flame rod. This can be done by slightly wiggling the
flame rod back and forth when tightening. You should also begin to feel
tension in the nut while tightening. Suggested torque is 60-75 in-lbs.
Figure 5-4 Tightening Flame Rod
• Once the flame rod is secure, double check the measurements for the
proper positioning of the flame rod end.
• Close burner door if opened and re-attach wiring connections.
• Reconnect power to boiler. Turn on boiler and check for a good flame
signal.
• A low-fire flame signal of 5-15 and above is considered good. If the flame
signal is lower, try rotating the flame rod slightly or adjusting the axial
position to obtain a stronger signal. If an acceptable flame signal can not
be produced, open the boiler door and check the flame rod settings with
respect to the boiler drawings.
To avoid proximity of the flame rod to the ignition electrodes, any
rotational adjustments should be made on the side opposite the
ignitor.
YES
Figure 5-6 Rotating Flame Rod
NO
(view from inside furnace)
Part No. 750-263