26
P/N 30149, Rev. G [12/15/2016]
Table C-2: System and General Troubleshooting
continued
Problem
Possible Cause
Remedy
Too much smoke.
Insufficient combustion air
adjustment at oil burner, or
improper draft pressure.
Adjust oil burner combustion air band and draft regulator to gain highest
practical CO2 or lowest practical O2 content in flue gases.
See Burner Set Up.
Heat exchanger partially
clogged.
Check for soot build-up in heat exchanger flue passages, especially in
outer radiator.
Soot building up on blast
tube (end coning).
Poor alignment between oil
burner blast tube and fire pot.
Check alignment. Blast tube should be centered with fire pot burner
opening. Oil burner head should be ¼ inch back from inside surface of fire
pot.
Flame impingement caused by
Incorrect nozzle angle.
Check nozzle size and angle. (See Appendix A).
Check distance from head to inside surface of fire pot.
Defective fire-pot
Check fire-pot. Repair or replace.
Furnace will not warm
home to desired
temperature.
Airflow blocked or dirty air filter.
Clean or replace air filter.
Thermostat adjustments or
location.
Check thermostat heat anticipator setting against measured amperage
draw. Increase heat anticipator setting if necessary. If thermostat is being
influenced by drafts, sunlight, duct work, etc., relocate to suitable location.
Insufficient airflow.
Check all dampers. Open closed dampers including registers in unused
rooms.
Check system temperature rise. If temperature rise is too high, speed up
blower fan.
Defective high limit control.
Test high limit function of all limit switches. Use duct thermometer to verify
accuracy of limit control.
Check for obstructions to airflow around limit switch bimetal elements.
Replace control if necessary.
Under-sized nozzle.
Check nozzle. If problem is not caused by air flow problems, use larger
nozzle, if permitted by rating plate.
Blower fan motor stopping
intermittently on overload.
Check blower fan motor amperage draw.
Check motor ventilation ports, clean if necessary. Replace motor if
necessary.
Burner motor stopping
intermittently on overload.
Check burner motor. Replace if necessary.
Home does not heat
evenly
Improper distribution of heat.
This is not likely to be a furnace problem. Balance duct system.
Supply air temperature
too hot.
Airflow blocked or dirty air filter.
Clean or replace air filter.
Insufficient airflow.
Check all dampers. Open closed dampers including registers in unused
rooms.
Check system temperature rise. If temperature rise is too high, speed up
blower fan.
Supply air temperature
too cool.
Excess airflow.
Check system temperature rise. Slow down blower fan if necessary.
Excessive duct losses.
Check supply air ductwork. Seal leaky joints and seams. Insulate ductwork
if necessary.
Supply air temperature
too cool during first
moments of furnace cycle.
Fan control "fan on" setting too
low.
Increase "fan on” dipswitch settings on EFT if control has this option.
Register air deflectors may help.
Excessive duct losses.
Check supply air ductwork. Seal leaky joints and seams. Insulate ductwork
if necessary.
APPENDIX C - SEQUENCE OF OPERATION AND TROUBLESHOOTING
Содержание BML-60B22
Страница 20: ...20 P N 30149 Rev G 12 15 2016 APPENDIX B WIRING DIAGRAMS Chimney Vent Furnace Wiring Diagram BML BMLV...
Страница 21: ...21 P N 30149 Rev G 12 15 2016 APPENDIX B WIRING DIAGRAMS Direct Vent Furnace Wiring Diagram BML BMLV...
Страница 31: ...31 P N 30149 Rev G 12 15 2016 Model BML and BMLV Diagram Direct Drive Model Shown 37...
Страница 32: ...P N 30149 Rev G 12 15 2016 ECR International 2210 Dwyer Avenue Utica NY 13501 web site www ecrinternational com...
