Operator`s manual

Operator's Manual: Model CB-1400
6-4
Starting the Burner (continued)
6. Fine Tuning the Combustion Air Band:
NOTE: The initial setting of the combustion air band may require additional adjustment.
• Refer to Figure 6A to identify the combustion air band location on the burner.
• Observe the flame. The flame should be yellow-white with sharp tips and no "sparkles."
• If the flame is orange in color or the flame length is too long, the oil you are burning requires
MORE combustion air. OPEN the air band 1/8" to 1/4", and recheck the flame for the proper
characteristics.
• Recheck the flame after five minutes. You should see a yellow-white flame with sharp tips and
no "sparkles", and the flame should extend half the way down the combustion chamber.
7. Checking for a Smokeless Burn:
Check for a smokeless burn by observing the stack while the burner is running. If you see any
smoke, repeat the previous steps for setting the combustion air band and adjusting the air
regulator. After adjusting the combustion air band, re-check the flame length.
NOTE: Check for a smokeless burn periodically (as you do the flame length). Immediately
readjust the burner if you ever see smoke coming from the stack. Smoke indicates improper air/
fuel adjustment.
NOTE: When using instruments to adjust the burner for a smokeless burn, the following
readings should be achieved:
• Draft over fire should be -.02 inch w.c.
• Adjust for a smoke spot of a trace to 2
• Adjust for a CO2 reading of 8 to 10% or an O2 reading of 7 to 9%
• Cad cell reading below 500 ohms
Checking the Operation of the Fan Motor
NOTE: It is important to verify that the fan motor operates correctly to ensure that the fan limit control is
properly cycling the fan motor as described below. Also refer to Appendix A (A-10) at the back of the manual
for additional information on the fan limit control.
1. Start the burner and adjust it as described previously in this section.
2. The fan motor will not start until the burner has been running for 5 to 15 minutes to heat up the
combustion chamber and heat exchanger. At this point, the fan limit control will activate the fan motor.
3. Once the fan motor has activated, turn the burner off by turning the wall thermostat to OFF.
4. With the burner off, the fan motor should continue to run for 5 to 10 minutes until the combustion
chamber is cooled down. The fan limit control will then shut off the motor.
WARNING: If the fan motor does not operate as described, immediately shut down your furnace to
avoid potential equipment damage and/or fire hazard. Contact your Clean Burn dealer immediately.