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L83UF, L83HF, L83BF, L83BR, & L83HR
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
Improper installation, adjustment, alteration, service,
or maintenance can cause injury or property damage.
Refer to this manual. For assistance or additional
information, consult a qualified installer or service
agency.
Do not store combustible materials, including gasoline
and other flammable vapors and liquids, near the
furnace, vent pipe, or warm air ducts. The homeowner
should be cautioned that the furnace area must not
be used as a broom closet or for any other storage
purposes. Such uses may result in actions that could
cause property damage, personal injury, or death.
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
The installation of the furnace, wiring, warm air ducts, venting, etc. must conform to the requirements of 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 USA); the Installation Code for Oil Burning Equipment, CSA Standard CAN/CSA B139 (in
Canada); the Canadian Electrical Code Part 1, CSA 22.1; the Recommendations of the National Environmental Systems
Contractors Association; and any state or provincial laws or local ordinances. Local authorities having jurisdiction should
be consulted before installation is made. Such applicable regulations or requirements take precedence over the general
instructions in this manual.
506794-01
INSTALLATION INSTRUCTIONS
Variable Speed Oil-Fired Furnaces
WARNING
WARNING
Save these instructions for future reference
Table of Contents
Installation ...................................................................3
Combustion and Ventilation Air....................................6
Electrical Wiring .........................................................10
Start-Up .....................................................................12
Sequence of Operation..............................................13
Maintenance and Service ..........................................15
Never burn garbage or paper in the heating system and
never leave rags, paper, or any flammable items around
the unit.
*P506794-01*
CAUTION
Issue 1243
CAUTION
(P) 506794-01
Page 1 of 16
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Summary of Contents for Lennox Allied Air L83UF
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Page 1: Table Of Contents
Such uses may result in actions that could cause property damage, personal injury, or death. Manufactured By *P506794-01* Allied Air Enterprises LLC A Lennox International, Inc. Company 215 Metropolitan Drive (P) 506794-01 West Columbia, SC 29170 CAUTION The installation of the furnace, wiring, warm air ducts, venting, etc. must conform to the requirements of the National Fire Protection Association Standard for the Installation of Oil Burning Equipment, NFPA No. - Page 2 Recheck all fittings for tightness _____________________________ Thermostat Manufactured By a. Type: Heating __________________ Cooling __________________ Allied Air Enterprises LLC A Lennox International, Inc. Company b. Anticipator set ___________________________________________ 215 Metropolitan Drive c. Wires: New ____________________ Old _____________________ West Columbia, SC 29170 Air Filter a.
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Page 3: Installation
Location Installation Locate the furnace as centrally as possible so that all warm pipes to the various rooms are nearly the same length. This allows each room to receive an equal and proper amount of heat. This may vary with each particular installation. WARNING Position the furnace so the pipe connection to the chimney This furnace is not approved for installation in a mobile... - Page 4 Non-Suspended Horizontal Installation To support the furnace from below, set the furnace on non Top View -combustible material suitable to support the weight of the unit. Using a carpenter’s level, check furnace in at least two directions. To make adjustments, use shims of non- Supply Return combustible material.
- Page 5 Cold Air Duct Blower Comparment Burner Combustible Sides 1” Sub-base Floor Base Return Plenum Top Insulation Supply Plenum Side 1” Slab Flooring (12" minimum) Return Plenum Side Supply Plenum Bottom 1” Joist Warm Air Plenum Front 16” Floor Floor Rear 1”...
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Page 6: Combustion And Ventilation Air
Combustion and Ventilation Air WARNING Adequate provisions for combustion air, ventilation of Combustion air openings in the front of the furnace furnace, and dilution of the gases must be made. When a must be kept free of obstructions. Any obstruction will furnace is installed in an unconfined space in a building, it cause improper burner operation and may result in a can be assumed that infiltration will be sufficient to supply... - Page 7 Local building codes may have more stringent 13. All unused chimney openings should be closed. installation requirements and should be consulted 14. All vent pipe run through unconditioned areas or before installation of the unit. outside shall be constructed of factory-built chimney The flue pipe should be as short as possible to do the sections (see Figure 7).
- Page 8 Front Flue Front Flue Rear Flue * Barometric control must be installed in the horizontal venting system and located within 18” of the flue outlet of the furnace. Rear Flue Figure 9. Horizontal Venting * Barometric control may be installed in either the vertical or horizontal section of the flue pipe within 18”...
- Page 9 Removal of Unit from Common Venting System Flue Pipe Draft Control When an existing furnace is removed from a common venting system service other appliances, the venting system is likely to be too large to properly vent the remaining attached appliances. The following test should be conducted with each appliance while the other 12"...
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Page 10: Electrical Wiring
Oil Supply and Oil Filter Connection To enable the continuous blower operation, place the fan switch on the thermostat into the ON position. A call for fan Continuous lengths of heavy wall copper tubing or steel from the thermostat closes R to G on the blower interface pipe are recommended and should be installed under the board. - Page 11 humidity. In this setup, the variable speed motor will operate Moving the jumper plug on the tap marked ADJUST from at 82% of the normal cooling airflow rate whenever there the NORM position to the (+) or (–) position will increase or is a call for dehumidification.
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Page 12: Start-Up
Burner Adjustment Start-Up All adjustment to this furnace and its components must be done by a qualified service technician. Oil Burner Refer to Table 3 for nozzle and pump pressure information. Burner Specification: Factory Settings The proper way to adjust an oil burner is with a CO Burner type: AFG (57 - 125) analyzer and a smoke gun. -
Page 13: Sequence Of Operation
To check and adjust the nozzle depth: Insert the small end of the “T” gauge into the end of the cone and measure from the flat of the end cone to the tip of the nozzle. The proper measurement should be 1.13”. - Page 14 Y1 y2 IMPORTANT 100% The system must not be in either the passive or active minutes dehumidification mode when charging a cooling system. Single Stage Cooling See Figure 14. A call for cooling from the thermostat closes the R to Y circuit on the blower interface board. The control CALL Y1 - 1 Stage Cool Demand Present waits for a 1-second delay before energizing the circulating...
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Page 15: Maintenance And Service
Emergency Replacement Motor Operation Maintenance and Service If the variable speed motor in this furnace needs to be replaced in an emergency situation (such as “no heat”) and an exact replacement motor is not immediately available, Oil Burner a standard PSC motor of equivalent frame size, voltage, It is recommended that the nozzle and oil filter be checked rotation, and horsepower can be temporarily installed until before each heating season. - Page 16 Figure 17. Wiring Diagram P/N 48252-001 Page 16 of 16 Issue 1243 506794-01...
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