Lennox OF23Q3/4-105, Installation Instructions Manual

Page 1: ...OF23 Oil AFII Burner Parts Arrangement 4 Requirements 4 Locate Level Unit 4 Unit Adjustments 5 Venting 6 Flue Connect ions 11 Supply Return Air Plenums 11 Oil Supply Lines Sizing 11 Connect Oil Supply...

Page 2: ...1 2 1334 27 686 18 x 21 457 x 533 18 x 16 457 x 406 OF23Q5 140 154 22 1 2 572 37 940 52 1 2 1334 27 686 21 x 21 533 x 533 21 x 16 533 x 406 OF23Q5 140 154R 22 1 2 572 37 940 52 1 2 1334 27 686 21 x 2...

Page 3: ...EAD HEAD INSULATOR CLIP RETAINING 1 4 HEX HEAD SCREW FB HEADS ASSY FOR AIR TUBE ASSY ELECTRODE HEAD NOZZLE LINE PEDESTAL ADAPTER NOZZLE AIR SCOOP INLET WHEEL BLOWER FLANGE GASKET MOTOR 4X4 BOX IGNITOR...

Page 4: ...re inch per 1 000 Btu per hour input This combustion air should be brought into the area containing the furnace below the level of the furnace burner IMPORTANT An opening to the outside for combustion...

Page 5: ...ct adjustment procedures Nozzle Adjustment Proper adjustment of the nozzle assembly is critical because alignment may have changed during shipping Before the fur nace and oil lines are installed the n...

Page 6: ...ed accord ing to the requirements of the National Fire Protection Asso ciation The smallest dimensions of the chimney should be at least equal to the diameter of the furnace vent connector Make sure t...

Page 7: ...pipe shall not be connected to a chimney vent serving a solid fuel appliance or any mechanical draft system 14 All unused chimney openings should be closed 15 All vent pipe run through unconditioned...

Page 8: ...Space An unconfined space is an area such as a basement or large equipment room with a volume greater than 50 cubic feet 1 4 cubic meters per 1 000 Btu 293 W per hour of the combined input rating of...

Page 9: ...Vent Figure 11 NOTE Each air duct opening shall have a free area of at least one square inch 6 4 square centimeters per 2 000 Btu 586 W per hour of the total input rating of all equipment in the enclo...

Page 10: ...common venting system Turn on any exhaust fans such as range hoods and bathroom ex hausts so they will operate at maximum speed Do not operate a summer exhaust fan Close fireplace damp ers 4 Followin...

Page 11: ...pace to install the draft control in the flue pipe it may be installed in the vent above the flue pipe Follow the instructions packed with the draft control Alternate Side Flue Connections The vent pi...

Page 12: ...or near walls to protect it from damage Avoid running pipes along joists or reverberating surfaces Always use flare fittings All fittings must be accessible Do not use compression fittings IMPORTANT...

Page 13: ...asy maintenance Table 4 lists the filters for the OF23 furnace Consult the burner manufacturer s instructions that are in cluded with the unit for further details concerning oil supply pipe connection...

Page 14: ...Page 14 Figure 16 Fan Control Board thermostat terminal strip Figure 17 Typical OF23 Wiring Diagram...

Page 15: ...Page 15 Figure 18 Typical OF23 Wiring Diagram...

Page 16: ...eat exchanger to prevent it from picking up radiant heat Set thermostat to its highest setting to start unit After plenum thermometers have reached their highest and steadiest readings subtract the re...

Page 17: ...should still be 0 02 less than the draft pres sure reading taken at the breach You may need to increase the stack draft by adjusting the barometric draft control 7 Stack Temperature Take a stack tempe...

Page 18: ...ergized Circulating fan is energized at the cool speed Cooling compressor turns on immediately Thermostat ends call for cool G and Y terminals are de energized Circulating fan and cooling compressor t...

Page 19: ...y control If the burner starts fault is in the Flame detector exposed to light Seal off false source of light the burner starts fault is in the detector circuit short circuit in the flame detec tor Re...

Page 20: ...le for plugged Nozzle strainer plugged Replace nozzle with the same size spray angle and spray type spect t e o e o p ugged orifice or carbon build up around orifice Poor or off center spray type Foul...

Page 21: ...inues to run d t l k Too much air lean short fire Reduce combustion air check combustion Poor Fire does not lock out of safety fault may be Too little air long dirty fire Increase combustion air check...

Page 22: ...operly rotating wheel Restrictions in return or supply air system Correct cause of restriction Adjustable limit control set too low Reset limit to maximum stop setting Power If voltage fluctuates faul...

Page 23: ...ack tem reading more than a trace Incorrect burner head adjust ment Correct burner setting CO2 stack tem perature and smoke Too little combustion air Increase combustion air smoke Too little blower ai...