Checking The Operation Of The Fan Motor - Saturn 125 Operator's Manual

Starting the Burner (continued)
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
combustion air 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
• 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 switch is
properly cycling the fan motor as described below. Also refer to Appendix A at the back of the manual
for additional pertinent information.
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 3 to 5 minutes to heat up the
combustion chamber and heat exchanger. At this point, the fan switch 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 switch 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.
Operator's Manual: Models Saturn™ 140 & Saturn™ 230
CO reading of 9% to 11% or an
2
O reading of 7% to 8%
2
6-4