506794-01
Page 1 of 16
Issue 1243
INSTALLATION INSTRUCTIONS
L83UF, L83HF, L83BF, L83BR, & L83HR
Variable Speed Oil-Fired Furnaces
Save these instructions for future reference
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.
(P) 506794-01
*P506794-01*
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
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.
WARNING
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.
WARNING
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.
CAUTION
Never burn garbage or paper in the heating system and
never leave rags, paper, or any flammable items around
the unit.
CAUTION
Table of Contents
Installation ...................................................................3
Combustion and Ventilation Air....................................6
Electrical Wiring .........................................................10
Start-Up .....................................................................12
Sequence of Operation..............................................13
Maintenance and Service ..........................................15
