OWNER’S MANUAL
M I D - E F F I C I E N C Y
G A S - F I R E D F U R N A C E S
UPFLOW/HORIZONTAL MODELS: P*HU / G8T-UH / L8T-UH / FL8-UH
DOWNFLOW MODELS: P*DN / G8T-DN / L8T-DN
035-14371-000 REV D (900)
CONTENTS
HOW YOUR GAS FURNACE WORKS . . . . 2
KEEP THE FURNACE AREA CLEAR . . . . . 2
START-UP AND SHUTDOWN GENERAL
INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . 2
FOR YOUR SAFETY, READ BEFORE
OPERATING: . . . . . . . . . . . . . . . . . . . . . . . . 2
WHAT TO DO IF YOU SMELL GAS: . . . . . . 2
LIGHTING INSTRUCTIONS . . . . . . . . . . . . . 2
SHUTDOWN INSTRUCTIONS . . . . . . . . . . . 3
YOUR FURNACE'S FILTER -
WHAT IT DOES . . . . . . . . . . . . . . . . . . . . . . 3
FREQUENCY OF CHECKING FILTERS . . . 3
LOCATING / REMOVING FILTERS . . . . . . . 3
HOW TO CLEAN YOUR
FURNACE'S FILTER . . . . . . . . . . . . . . . . . . 4
MOTOR LUBRICATION . . . . . . . . . . . . . . . . 4
INSTALLATION & MAINTENANCE
INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . 4
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
- Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
- Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
