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E2004 Lennox Industries Inc.
Dallas, Texas, USA
WARNING
This product contain fiberglass wool.
Disturbing the insulation during installation, main-
tenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiber-
glass wool is known to the State of California to
cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379−9900
®
Elite
Series Oil Furnace
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
OHR23 oil furnaces. In Canada, refer to CSA B139 for rec-
ommended installation procedures. Consult authorities
who have jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause personal injury, loss
of life, or damage to property.
Installation and service must be performed by a
qualified installer or service agency.
06/04
*2P0604*
®
®
Series
INSTALLATION
INSTRUCTIONS
OHR23 Series Units
OIL UNITS
504,628M
38152A061
06/04
Supersedes 4/02
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RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
Shipping & Packing List
1− Assembled oil furnace
1− Draft control
Check the components for shipping damage. If you find
any damage, immediately contact the last carrier.
Never burn garbage or paper in the heating system.
Never leave papers near or around the unit.
Do not store or use gasoline or other flammable va-
pors and liquids in the vicinity of this or any other
appliance.
When venting this appliance, keep vent terminal
free of snow, ice and debris.
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CAUTION
504,628M
*P504628M*
Litho U.S.A.
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Table of Contents
Related Manuals for Lennox OHR23-105
Summary of Contents for Lennox OHR23-105
-
Page 1: Table Of Contents
1− Assembled oil furnace 1− Draft control not supersede local codes in any way. Only qualified tech- ® nicians can install and service the Lennox Elite Series Check the components for shipping damage. If you find any damage, immediately contact the last carrier. -
Page 2: Unit Dimensions
OHR23 Unit Dimensions − Inches (mm) TOP VIEW Model No. 53 (1346) 20-1/2 20-1/2 10-1/4 OHR23Q3- OHR23Q3- 105/120 4 KNOCKOUTS 23-1/2 23-1/2 4-3/4 11-3/8 OHR23Q5- OHR23Q5- 14-1/2 (For Suspending) 140/154 (368) 3-1/2 FLOW (89) RETURN FLUE OUTLET 59 (1499) (203) (19) BURNER 32-1/2 (826) -
Page 3: Ohr23 Unit Parts Arrangement
OHR23 Unit Parts Arrangement CLEAN−OUT PORT FLUE OPENING HEAT EXCHANGER BECKETTR AFII BURNER INDOOR BLOWER CLEAN−OUT PORT CONTROL BOX WITH FAN CONTROL BOARD Figure 1 OHR23 Oil Burner Parts Arrangement FLANGE PRIMARY AIR TUBE ELECTRONIC IGNITION GASKET CONTROL SCREWS IGNITOR TRANSFORMER FLANGE REAR ACCESS... -
Page 4: Requirements
Table 2 Requirements Horizontal Installation Clearances Installation of Lennox oil−fired furnaces must conform with Clearances Inches (mm) the National Fire Protection Association Standard for the Top of Cabinet 3 (76) Installation of Oil Burning Equipment, NFPA No. 31, the *Bottom and Rear of Cabinet 1 (25) National Electrical Code, ANSI/NFPA No.70 (in the... -
Page 5: Installation
When installed, furnace must be electrically grounded in Hanger Rod Installation accordance with local codes or, in the absence of local codes, with the current National Electric Code, ANSI/ top of NFPA No. 70, if an external electrical source is utilized. furnace Field wiring connection with unit must meet or exceed specifications of type T wire and withstand a 63_F (17_C) -
Page 6: Initial Unit Adjustments
There is adequate wire to re- (NOT FUR- NISHED move the burner without disconnecting wires. Once re- BY LENNOX) moved, just turn the burner around in the vest panel area. FILTER OHR23 Series Burner Removal... -
Page 7: Venting
To check nozzle alignment, again insert the small end into Prior to installation of unit, make a thorough inspection of the end cone and measure the nozzle and electrode align- the chimney to determine whether repairs are necessary. ment against the center lines marked on the gauge (again Make sure the chimney is properly constructed and sized refer to enclosed illustration sheet). -
Page 8: Combustion And Ventilation Air
Masonry Chimney Factory-Built Chimney BAROMETRIC LINER CONTROL* (IN EITHER BAROMETRIC FACTORY LOCATION) CONTROL* BUILT (IN EITHER CHIMNEY HORIZONTAL LOCATION) APPLICATION SHOWN CLEAN HORIZONTAL APPLICATION SHOWN DRAIN FOR CONDENSATE MASONRY CHIMNEY CLEAN OUT *BAROMETRIC CONTROL MAY BE INSTALLED IN EITHER VERTICAL OR HORI- ZONTAL SECTION OF FLUE PIPE WITHIN 18"... - Page 9 Air from an Adjacent Space CAUTION If the confined space housing the furnace adjoins space categorized as unconfined, air can be brought in by provid- Insufficient combustion air can cause headaches, nausea, dizziness or asphyxiation. It will also cause ing two permanent openings between the two spaces. excess water in the heat exchanger resulting in rust- Each opening must have a minimum free area of 1 square ing and premature heat exchanger failure.
- Page 10 Equipment In Confined Space − All Air From Equipment In Confined Space − All Air From Outside (Inlet Air from Crawl Space and Outside CHIMNEY Outlet Air to Ventilated Attic) OR OIL VENT CHIMNEY OR OIL VENT VENTILATION LOUVERS OUTLET AIR (EACH END OF ATTIC) WATER WATER...
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Page 11: Flue Connections
Removal of Unit from Common Venting System Use the barometric draft control in the horizontal (sidewall) venting system. Locate the barometric draft control within In the event that an existing furnace is removed from a 18 inches of the furnace flue outlet. See figure 14 for baro- venting system commonly run with separate gas ap- pliances, the venting system is likely to be too large to metric draft control location. -
Page 12: Oil Supply Lines Sizing
every foot of horizontal run. Flue pipe or vent connec- NOTE − As an extra precaution, cycle heating on and off tor must be inserted into but not beyond the outside ten times after bleeding air from the oil pump. This will wall of the chimney flue. -
Page 13: Oil Supply Line & Filter Connections
Use continuous lengths of heavy wall copper tubing or 5. Tighten the bleed valve securely. steel pipe for oil supply pipe. Install oil supply pipe under Two−Pipe Systems floor or near walls to protect it from damage. Avoid running If the installation requires a two−pipe operation, install the pipes along joists or reverberating surfaces. -
Page 14: Electrical Wiring
Electrical Wiring Fan Control Board All wiring must conform to the National Electric Code (NEC), or Canadian Electric Code (CEC) and any local codes. Refer to figure 18 for terminal designations on blower control. 1. Refer to appliance rating plate for proper fuse size. 2. -
Page 15: Unit Start−Up & Adjustments
Limit Control Unit Start−Up & Adjustments Limit Control Do not adjust from factory setting. Before starting the unit, make sure the oil tank is adequate- Fan Control ly filled with clean No. 1 or No. 2 furnace oil. The fan on time of 30 seconds is not adjustable. Fan off NOTE −... -
Page 16: Service
1. Throw-Away Type Filters Filters should be checked NOTE − A heat exchanger clean-out kit ABRSH380 monthly and replaced when necessary to assure prop- (35K09) is available from Lennox. Page 16... -
Page 17: Start−Up & Performance Checklist
OHR23 Start−Up & Performance Check List Job Name Job no. Date Job Location City State Installer City State Unit Model No. Serial No. Service Technician HEATING SECTION Electrical Connections Tight? - Supply Voltage Blower Motor Amps Blower Motor Burner Model No. Serial Number Piping Connections Tight? - All Valves Open? -... -
Page 18: Troubleshooting
Troubleshooting Burner failure or improper operation can result from a num- The following troubleshooting charts list some failures, ber of different causes. Often the cause can be pinpointed causes and a sequence of steps to isolate the point of fail- by observing the different types of failure or by the process ure. - Page 19 Troubleshooting: Fan board operating sequence Action System Response Continuous circulating fan is connected. Circulating fan is energized at low speed when there is no call for heat, (Optional connectors are available for cool or fan. separate circulating fan speed tap.) If fan operation is required by a call for heat, cool, or fan, the ST9103A switches off the continuous fan speed tap before energizing the other fan speed.
- Page 20 Troubleshooting: Burner fails to start. Source Procedure Causes Correction Burner Place the trouble light Blown fuse Replace the fuse. 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 Binding burner blower wheel Turn off power and rotate the...
- Page 21 Troubleshooting: Burner starts, but no flame is established. Source Procedure Causes Correction Ignition Remove gun assembly and inspect Fouled or shorted electrodes Clean electrode leads. Electrodes Electrodes electrodes and leads electrodes and leads. Dirty electrodes and leads Eroded electrode tips Clean electrode tips and reset the gap to 5/32 inches and the gap to 5/32 inches and...
- Page 22 Troubleshooting: Burner starts and fires, but lock out on safety. Source Procedure Check Causes Correction Poor Fire If burner Unbalanced fire Replace nozzle contin es to continues to Too much air − −lean short Reduce combustion air − check run, this may fire combustion.
- Page 23 Troubleshooting: Burner Starts and Fires, but Loses Flame and Lock Out on Safety Source Procedure Check Causes Correction Oil Supply Listen for pump whine Restriction in oil line Clear restriction. Plugged fuel pump strainer Clean strainer or replace pump. Cold oil − outdoor tank Change to number 1 oil.
- Page 24 Troubleshooting: Burner runs continuously (too much heat). Source Procedure Check Causes Correction Thermostat Check Burner; if burner Shorted or welded Repair or replace the turns off, fault is in the thermostat contacts thermostat. thermostat circuit. t t i Stuck thermostat bimetal Clear obstruction or replace thermostat.