
14
Initial Operation of Furnace
Initial Burner Operation:
c IMPORTANT: The start-up sheet found in Appendix A of this manual should be completed.
1. Turn the electrical disconnecting switch to the “OFF” position.
2. Set the room thermostat above room temperature.
3. Be sure the oil tank is full of clean # 2 fuel oil.
4. Open all shutoff valves in the oil line.
5. Refer to the oil burner manufacturer’s operating instructions (included with the
furnace) for detailed startup instructions
6. Measure the oil pump pressure. If required, adjust it to deliver the appropriate
pressure for the burner. The oil pump should be set to produce,
130 PSIG, for the R.W. Beckett model AFG burner
140 PSIG, for the Carlin Combustion Technology model EZ-1HP
7. Carbon Dioxide (CO2) and Carbon Monoxide (CO) – In order to assure that
proper and safe combustion are taking place, carbon dioxide and carbon
monoxide measurements must be taken. A CO2 reading within the limits of
appendix C with no measurable CO is desirable. The maximum acceptable CO
reading is about 50 PPM. If the CO reading is too high, open the burner air
shutter, or air band, slightly to permit more combustion air to the flame.
Recheck the CO level and adjust as required.
8. Draft – Draft measurements should be taken through the overfire port and in
the vent connector, not more than 12 inches away from the furnace outlet. A
5/16 in. hex washer head bolt plugs the overfire port in the burner mounting
plate. Remove the bolt and insert a suitable draft measurement gage.
9. Flue Gas Temperature – The flue gas temperature will vary depending on heat
input rate, air temperature rise across the heat exchanger, and air flowrate
through the furnace. To prevent excessive water vapor condensation from the
flue gases, the gross flue gas temperature should not fall below 330ºF. In
addition, if the gross flue gas temperature exceeds 650ºF, the heating
efficiency of the furnace will be reduced.
10. Cycle the furnace several times to verify the burner lights off and shuts down
smoothly without excessive noise or smoke production.
Supply/Return Airflow and Air Temperature
The supply/return airflow shall be set to obtain an air temperature rise, across the
furnace, in the range of 55º to 85ºF for all models. Since the flow resistance of each duct
system is slightly different, the airflow (fan speed) may have to be changed in the field to
achieve a satisfactory temperature rise.
The blower (fan) speed is adjusted by changing the fan motor winding energized by the
control system. Refer to furnace wiring diagram, Appendix B. To adjust the fan speed,
follow this procedure.
a. Turn off all electrical power to the furnace at the disconnecting switch.