Table of Contents
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E 2002 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
Do not store or use gasoline or other flammable va-
pors and liquids in the vicinity of this or any other ap-
pliance.
WARNING
Improper installation, adjustment, alteration, ser-
vice, or maintenance can cause injury or property
damage. Refer to this manual. For assistance or
additional information, consult a qualified installer
or service agency.
CAUTION
When venting this appliance, keep vent terminal free
of snow, ice and debris.
01/04
*2P0104*
Front
Flue Model
INSTALLATION
INSTRUCTIONS
OF23 SERIES UNITS
OIL UNITS
504,627M
38152A060
01/04
Supersedes 04/02
Table of Contents
General
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Shipping & Packing List
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Connect Oil Supply Line and Filter
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General
These instructions are intended as a general guide and do
not supersede local codes in any way. Only qualified tech-
nicians can install and service the Lennox Elite
OF23 oil furnaces. In Canada, refer to CSA B139 for rec-
ommended installation procedures. Consult authorities
who have jurisdiction before installation.
Never burn garbage or paper in the heating system.
Never leave papers near or around the unit.
Shipping & Packing List
1− Assembled oil furnace
1− Barometric draft control
1− Side exhaust pipe collar (front flue units only)
1− Direct intake collar (AFII burner units only)
Check the components for shipping damage. If you find any
damage, immediately contact the last carrier.
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CAUTION
504,627M
*P504627M*
Litho U.S.A.
1
1
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2
3
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Series
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Related Manuals for Lennox OF23Q3/4-105
Summary of Contents for Lennox OF23Q3/4-105
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Page 1: Table Of Contents
Only qualified tech- WARNING ® nicians can install and service the Lennox Elite Series OF23 oil furnaces. In Canada, refer to CSA B139 for rec- Do not store or use gasoline or other flammable va- ommended installation procedures. -
Page 2: Of23 Unit Dimensions
OF23Q3/4-105/120R, OF23Q5-140/154R SIDE FLOW FLUE OUTLET OF23Q5−175/210R FLOW CENTERING HOLE (Field Fabricate Either Side) FLUE CONNECTION OF23Q3/4-105/140 & OF23Q5-140/154 (On Heat Exchanger) OPT. OUTDOOR COMBUSTION ELECTRICAL INLETS AIR INLET (Right Side Only) CENTERING HOLE (Field Fabricate Right Side only) (25) -
Page 3: Of23 Unit Parts Arrangement
OF23 Unit Parts Arrangement flue opening filter clean-out port indoor blower limit switch control box with fan control board heat exchanger observation port clean−out BeckettR AFII Burner port (Shown) Figure 1 OF23 Oil AFII Burner Parts Arrangement FLANGE ELECTRONIC IGNITION PRIMARY AIR TUBE GASKET... -
Page 4: Requirements
Table 2 P.O. Box 799900 Installation Clearances Dallas, TX 75379−9900 All Unit Sizes Installation of Lennox oil−fired furnaces must conform with Clearances inches (mm) the National Fire Protection Association Standard for the Installation of Oil Burning Equipment, NFPA No. 31, the... -
Page 5: Locate & Level Unit
Nozzle Adjustment Locate & Level the Unit Proper adjustment of the nozzle assembly is critical because The compact design of this furnace makes it ideal for a alignment may have changed during shipping. Before the fur- basement or utility room installation. Choose a central nace and oil lines are installed, the nozzle assembly must be location for the furnace so that supply air ducts approxi- checked. -
Page 6: Venting
Prior to installation of unit, make a thorough inspection of the Beckett Oil Burner Nozzle Adjustment chimney to determine whether repairs are necessary. Make Burner must be removed from sure the chimney is properly constructed and sized accord- furnace for this procedure. ing to the requirements of the National Fire Protection Asso- gauge ciation. - Page 7 15− All vent pipe run through unconditioned areas or out- Front Flue / Masonry Chimne side shall be constructed of factory built chimney sec- barometric tions. See figure 7. control* liner (in either location) 16− Where condensation of vent gas is apparent, the vent should be repaired or replaced.
- Page 8 Combustion and Ventilation Air space. This space also includes adjacent rooms which are (Confined and Unconfined Spaces) not separated by a door. Though an area may appear to be unconfined, it might be necessary to bring in outdoor air for In the past, there was no problem in bringing in sufficient combustion if the structure does not provide enough air by amounts of outdoor air for combustion −−...
- Page 9 Air from Outside Equipment In Confined Space If air from outside is brought in for combustion and ventila- All Air From Outside tion, the confined space shall be provided with two perma- nent openings. One opening shall be within 12" (305 mm) Chimney Or Oil of the top of the enclosure and one within 12"...
- Page 10 To convert the AFII burner from confined space to outside 7− If improper venting is observed during any of the combustion air, remove the three screws which attach the above tests, the common venting system must be cor- rected. inlet air scoop to the burner and insert 4" (102 mm) direct air intake piping.
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Page 11: Flue Connections
vent connector, plus 50% of the area of any additional flues Flue Connections or vent connectors. Install the barometric draft control (pro- vided) and flue pipe according to instructions packed with IMPORTANT control. Inspect flue pipe annually. Clean soot or ash from flue pipe, When flue pipe is installed at less than minimum if necessary. - Page 12 Use continuous lengths of heavy wall copper tubing or Oil Piping steel pipe for oil supply pipe. Install oil supply pipe under One-Pipe System floor or near walls to protect it from damage. Avoid running air vent Î Î Î Î Î Î Î Î Î Î Î Î pipes along joists or reverberating surfaces.
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Page 13: Leak Check
1 − Connect the inlet pipe to the pump inlet. Start the burner. Table 4 Oil Filters (All Models) 2 − Arrange the primary burner control for continuous op- eration during purging. See figure 14. Cat. Oil Filters Number 3 − Turn the bleed valve one turn counterclockwise. 10 micron filter (no mounting bracket) 81P89 4 −... - Page 14 Fan Control Board thermostat terminal strip Figure 16 Typical OF23 Wiring Diagram Figure 17 Page 14...
- Page 15 Typical OF23 Wiring Diagram Figure 18 Page 15...
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Page 16: Start−Up & Adjustment
readings, subtract the readings. The difference in tempera- Start−Up & Adjustment tures in the supply and return air plenums should approxi- Before starting unit, make sure the oil tank is adequately mate the temperatures listed in table 5 and the appliance filled with clean No. -
Page 17: Service
7− Clean around burner, blower deck and vestibule area. 7 − Stack Temperature NOTE − A heat exchanger clean-out kit ABRSH380 Take a stack temperature reading in the vent pipe. Subtract (35K09) is available from Lennox. Page 17... -
Page 18: Troubleshooting
Troubleshooting Burner failure or improper operation can result from a num- lowing troubleshooting charts list some failures, causes ber of different causes. and a sequence of steps to isolate the point of failure. Often the cause can be pinpointed by observing the differ- Check the simplest and most obvious items before prog- ent types of failure or by the process of elimination. - Page 19 Troubleshooting: Burner fails to start. Source Procedure Causes Correction Thermostat in OFF or COOL Switch to HEAT. Thermostat Check thermostat settings. Turn thermostat to higher tem- Thermostat is set too low perature. Burner motor overload tripped Push reset button pump motor. Check burner motor, primary Primary control tripped on safe- Reset primary control.
- Page 20 Troubleshooting: Burner starts, but no flame is established. Source Procedure Causes Correction Check tank gauge or use dip No oil in tank Fill tank. stick. Coat dip stick with litmus paste If water depth exceeds 1 inch, Oil Supply Water in oil tank and insert into bottom of tank.
- Page 21 Troubleshooting: Burner starts and fires, but lock out on safety. Source Procedure Causes Correction Unbalanced fire Replace nozzle Reduce combustion air − check Too much air − −lean short fire If burner con- combustion. tinues to run, Increase combustion air − check Too little air −...
- Page 22 Troubleshooting: Burner starts and fires, but short cycles (too little heat) Source Procedure Causes Correction Heat anticipator set too low Correct heat anticipator setting. Vibration at thermostat Correct source of vibration. Thermostat Thermostat Check thermostat. Check thermostat. Thermostat in the path of a Shield thermostat from draft or warm air draft relocate.
- Page 23 Troubleshooting: Burner runs continuously (too little heat). Source Procedure Causes Correction Too much combustion air Reduce combustion air. Air leaks into heat exchanger Correct cause of air leak. around inspection door, etc. Low CO Low CO less less Adjust barometric draft con- than 10%.
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