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Lennox International Inc. O23V3-90 - page 1
,t_ 2005 Lennox industries Inc, Dallas, Texas, USA INSTALLATION INSTRUCTIONS O23V Series Units OIL UNITS _ Technical 505,082M LL.L[ Publications 10/05 Litho U.S.A. RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE A IMPORTANT O23V SERIES UNITS ARE NOT FOR USE IN ZONING APPLICATIONS! These instructions are intended as a general guide and do not superse ...
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Lennox International Inc. O23V3-90 - page 2
3/4 (19) 3/4_19) 4 D-------_ c==_ CZ222ZD C SUPPLY O AIR czz_ OPENING _ SIDE FLUE OUTLET CENTERING HOLE_ (Field Fabricate Either Side) ELECTRICAL INLET (Right Side Only) OIL PIPING INLET (Left Side Only)_ OPT. OUTDOOR COMBUSTION AIR INLET CENTERING HOLE (Field Fabricate Right Side only) RETURN AIR OPENING (Either Side) 1-1/2 (38)--IP, 1-1/4 (32)--I ...
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Lennox International Inc. O23V3-90 - page 3
HEATEXCHANGER FLUE OPENING CLEAN-OUT PORT LIMIT SWITCH CONTROL BOX WITH FAN CONTROL BOARD CLEAN-OUT PORT OBSERVATION PORT BECKETT@ AFIIBURNER COMBUSTION AIR INTAKE VARIABLE SPEED BLOWER MOTOR CAPACITOR Figure 2 CONNECTOR TUBE ELECTRONIC PRIMARY 4X4 AIR FLANGE GASKET IGNITION REAR ACCESS CONTROL BOX ADJUST AIR TUBE TRANSFORMER DOOR GASKET IGNITOR DI ...
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Lennox International Inc. O23V3-90 - page 4
A CAUTION A CAUTION Model No. O23V-70/90/105/120 O23V-140/154 Installation of Lennox oil-fired furnaces must conform with the National Fire Protection Association Standard for the Installation of Oil Burning Equipment, NFPA No. 31, the National Electrical Code, ANSI/NFPA No.70 (in the U.S.A.), CSA Standard CAN/CSA-B139 (in Canada), Installation Cod ...
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Lennox International Inc. O23V3-90 - page 5
Neither the nozzle setting nor the airadjustments are fac- tory set. The furnace is firetested andthe limit control is checked to make sure it functions properly; no factory set- tings are made. During installation, the furnace must be "set up." The installing dealer/contractor must have and use proper test equipment in order to correctly ...
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Lennox International Inc. O23V3-90 - page 6
A, WARNING I A WARNING CAUTION NOTE - Oil burning equipment may be vented into an ap- proved masonry chimney or type L vent. (Type L vent is similar in construction to type B gas vent. Type L vent car- ties a higher temperature rating and is constructed with an inner liner of stainless steel, rather than aluminum.) Prior to installation of unit, ma ...
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Lennox International Inc. O23V3-90 - page 7
16. Where condensation of vent gas is apparent, the vent should be repaired or replaced, Accumulation of con- densation in the vent is unacceptable. 17. Vent connectors serving this appliance shall not be connected into any portion of mechanical draft sys- tems operating under positive pressure, 18. Keep the area around the vent terminal free of sn ...
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Lennox International Inc. O23V3-90 - page 8
Air from an Adjacent Space If the confined space housing the furnace adjoins space categorized as unconfined, air can be brought in by provid- ing two permanent openings between the two spaces. Each opening must have a minimum free area of 1 square inch (6.4 square centimeters) per 1,000 Btu (293 W) per hour of the total input rating of all fuel-fi ...
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Lennox International Inc. O23V3-90 - page 9
Equipment in Confined Space All Air From Outside OR_ _ OIL VENT _ WATER II II II II HEATER II II OIL FURNACE INLET AIR NOTE - Each air duct opening shall have a free area of at least one square inch (6A square centimeters) per 2,000 Btu (586 W) per hour of the total input rating of all equipment in the enclosure. If the equipment room is located ag ...
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Lennox International Inc. O23V3-90 - page 10
Locate the barometric draft control within 18 inches of the furnace flue outlet, See figure 13 for barometric draft con- trol location. Horizontal Venting BAROMETRIC CONTROL* HORIZONTAL VENT- -- ING CONTROL CC3 *Barometric control must be installed in the horizontal venting system and located within 18" of flue outlet of furnace. Q U Figure 13 ...
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Lennox International Inc. O23V3-90 - page 11
Oil Piping - One-Pipe System -- AIR VENT -- FILL PIPE _o_1 II TANK I v_l 8ft(2.4m) ol II 111S"UT'OFF I "Maximam IL VALVE I One Pipe Lift _o Oo °°8° _o °o °o_o °o o_ Figure 15 To determine the correct tubing size for piping, refer to table 3 Table 3 One-Pipe Oil Sizing Line Length Pipe Diameter (OD Tubing) 0-50' (15 m) 3/8& ...
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Lennox International Inc. O23V3-90 - page 12
One-Pipe Systems CAUTION The burner is shipped with fuel pump set for one-pipe op- eration. For one-pipe systems, the oil supply pipe is con- nected to the inlet tap on the pump. A one-pipe system should only be used where there is gravity oil flow to the pump and the pipe is not run at any point above the oil level in the tank. 1. Connect the inle ...
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Lennox International Inc. O23V3-90 - page 13
IMPORTANT 2, Install the room thermostat and make wire connec- tions to the fan control board. Avoid installing thermo- stat on an outside wall or where it can be affected by radiant heat, Set the adjustable heat anticipator on thermostat according to the wiring diagram sticker pro- vided on unit, 3, Install a separate fused disconnect switch near ...
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Lennox International Inc. O23V3-90 - page 14
ADJUST The ADJUST pins allow the motor to run at normal speed, approximately 15% higher than normal speed, or 15% low- er than normal speed. Table 6 gives three rows--NORM, (+), and (-) with their respective CFM volumes. Notice that the normal <'NORM" adjustment setting for cool speed position C in table 6 is 800 CFM The "(+)" ...
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Lennox International Inc. O23V3-90 - page 15
Continuous Fan When the thermostat is set for "Continuous Fan" operation and there is no demand for heating or cooling, the blower control will provide 50% of the COOL CFM selected. G l 50% &_ / G - Fan switch ON CALL g - Fan switch OFF OFF NOTE - With the proper thermostat and subbase, continu- ous blower operation is possible by clo ...
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Lennox International Inc. O23V3-90 - page 16
023V Wiring Diagram $2, _ ? THERMOSTAT " I _ ' L J LLL: - FACTORY *IRINE co&_____.NsiNG LINE VOLTAGE - -- - LOW VOLTAGE FIELD WIRING DENOTES OPTIONAL COMPONENTS /X 1F ANY WIRE IN THIS APPLIANCE IS REPLACED, IT MUST BE REPLACED WITH LIKE SIZE,RATINE AND INSULATION THICKNESS. REATINO SPEED SELECTOR IF H(_RIZONTAL APPLICATIUN -- IS USED, ...
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Lennox International Inc. O23V3-90 - page 17
Before starting unit, make sure the oil tank is adequately filled with clean No, 1 or No, 2 furnace oil, NOTE - Water, rust or other contaminants in oil supply sys- tem will cause malfunction and failure of the internal parts of the fuel pump. CAUTION 1, Set thermostat for heating demand and turn on electri- cal supply to unit, 2, Check initial air ...
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Lennox International Inc. O23V3-90 - page 18
causing the unit to start sooting/smoking, Things which might affect combustion include a nozzle going bad, draft that changes during different climatic condi- tions, dirty oil, dirt obstructing the air inlet, etc. To build in a "window of operation," set up the burner to be 2% less in CO2, For example, if you find a reading of 12% CO2, a ...
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Lennox International Inc. O23V3-90 - page 19
4, Action: Established flame fails Response: • Burner motor is de-energized and oil primary con- trol goes into recycle mode, • If the fan off delay is longer than the recycle timing, the heat fan continues to run through the next trial for ignition. 5. Action: Limit Switch Opens Response: • Oil primary control shut off the burner. • Circul ...
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Lennox International Inc. O23V3-90 - page 20
Source Procedure Causes Correction Burner Blown fuse Replace the fuse. Place the trouble light between the black and white leads to the burner motor. No light indicates that no power is getting to the motor. Place trouble light between the black and white leads to the blower motor. Light indicates power to the motor and burner fault. Binding burner ...
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Lennox International Inc. O23V3-90 - page 21
Source Procedure Causes Correction Burner Motor Low line voltage Motor does not come up to speed and trips out on overload. Turn off power and rotate blower wheel by hand to check for binding or excessive drag. Check voltage at power source. Correct cause of voltage drop or the call power company. Pump or blower overloading motor Correct cause of o ...
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Lennox International Inc. O23V3-90 - page 22
Source Procedure Correction Power Locate and secure connection. If voltage fluctuates, fault is in the power source. Recheck voltage at the power source. Causes Loose wiring connection Low or fluctuating line voltage Call power company. Source Poor Fire Flame Detector Oil Supply Procedure After burner fires, immediately jumper across flame detector ...
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Lennox International Inc. O23V3-90 - page 23
Source Procedure Thermostat Disconnect thermostat wires at the primary control. • Burner turns off: ther- mostat circuit faulty. Primary • Burner not turning off: control primary control faulty. Combus- tion Oil Pres- sure Check burner combustion for CO2, stack temperature, and smoke • Low CO2 less than 10%. • High smoke reading more than a ...
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Lennox International Inc. O23V3-90 - page 24
Customer Name Street Address City State/Zip Code Furnace Model # Serial # Input Rate Nozzle Used New Construction Replacement Installation Data Furnace Location: A Basement- Open Enclosed* B Utility Room - Open Enclosed* C Closet- Open Enclosed* D Crawl Space- Open Enclosed* *Provisions must be made for adequate air for combustion. See Combustion a ...
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