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107273-UUM-C-0306
SECTION IV: GAS CONVERSION BURNER
FIRE OR EXPLOSION HAZARD - Failure to follow safety
warnings exactly could result in serious injury, death, or prop-
erty damage.
—
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
(including cell phone) in your building.
• Leave the building immediately.
• 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 depart-
ment.
—
Installation and service must be performed by a qualified
installer, service agency or the gas supplier. Warranty is
voided if not installed by qualified service person.
FOR YOUR SAFETY
1.
The furnace area must be kept clear and free of combustible mate-
rials, gasoline and other flammable vapors and liquids.
2.
Insulating materials may be combustible. The furnace must be
kept free and clear of insulating materials. The furnace area must
be examined when installed in an attic or other insulated space or
when insulation is added to be sure that the insulation material has
been kept away from the furnace.
3.
Follow the instructions exactly as shown on the OPERATING
INSTRUCTION LABEL or the Start-up and Shutdown Instructions
on Page 18 of this manual when lighting the furnace or turning the
furnace off.
4.
Should the gas supply fail to shut off or if overheating occurs, shut
off the gas valve to the furnace before shutting off the electrical
supply.
5.
Do not use this furnace if any part has been under water. A flood-
damaged furnace is extremely dangerous. Attempts to use the fur-
nace can result in fire or explosion. A qualified service agency
should be contacted to inspect the furnace and replace all gas
controls, control system parts, electrical parts that have been wet
or the furnace if deemed necessary.
...
6.
NEVER
Store flammable materials of any kind near your fur-
nace. Gasoline, solvents, and other volatile liquids should be
stored only in approved containers outside your home. These
materials vaporize easily and are extremely dangerous.
...
7.
NEVER
Store cleaning materials near your furnace. Materials
such as bleaches, detergents, powdered cleansers, etc., can
cause corrosion of the heat exchangers.
...
8.
NEVER
Use the area around your furnace as a storage area for
items which could block the normal flow of air. This flow of air is
required for ventilation of the various furnace components.
OVERHEATING HAZARD
Should overheating occur:
• Shut off the manual gas valve to the appliance.
• Do not shut off the control switch to the pump or blower.
16
CARBON MONOXIDE POISONING HAZARD - Carbon Mon-
oxide is a colorless, odorless gas than can kill. Follow these
rules to control carbon monoxide.
• Do not use this burner if in an unvented, enclosed area. Carbon
monoxide may accumulate.
• Check flue gases for carbon monoxide. This check requires
specialized equipment.
• Allow only qualified burner service persons to adjust the burner.
Special instruments and training are required.
• Read the owner's manual before using.
ELECTRIC SHOCK HAZARD - High voltages are present in
this equipment. Follow these rules to avoid electric shock.
• Use only a properly grounded circuit. A ground fault interrupter
is recommended.
• Do not spray water directly on burner.
• Turn off power before servicing.
• Read the owner's manual before using.
These instructions should be affixed to the burner or adjacent to the
heating appliance.
HOW YOUR GAS FURNACE WORKS
The furnace heating cycle is started when you set your thermostat to
provide more heat in your home or the temperature in the living space
dropped below the thermostat set point. First, the burner motor starts to
purge the heat exchanger of any remaining gases. Next, the ignition
transformer sends a spark through the electrode and after a 38 second
prepurge the gas valve opens and ignition occurs. A short time later, the
blower starts and distributes the warm air throughout the home. When
the temperature setting on your thermostat is reached, the gas valve
closes, the main burner is turned off, and the blower continues to run
until the remaining warm air in the system is distributed to the living
space. When the blower stops, the heating cycle has ended.
While you are away
Your furnace is equipped with a safety device which will shut off the
supply of gas to the burner in case of malfunction. For this reason it is
never practical to assume that the furnace will operate unattended for a
long period of time, especially if there is a possibility of damage to your
property because of freezing. So, if you plan to be away from home,
arrange for someone to check your house every day.
DESCRIPTION
This furnace shall be installed in the downflow position. Figure 17
shows a typical model in the downflow position. The furnace is
equipped with an forced-draft combustion air and vent blower and
atmospheric burners. Combustion air is taken from a 2" pipe and forced
down the air tube and into the burner. Flue gas is forced from the heat
exchanger by the combustion air and vent blower and discharged
through the flue pipe to the outside atmosphere.
This is a forced air furnace. The furnace circulating air blower draws
cool air from the house, passes it over the hot furnace heat exchanger
and circulates the warmed air through the ductwork to the living space.
The furnace is equipped with the controls necessary for proper opera-
tion. The various components referred to in this manual and on the fur-
nace rating plate are identified in Figure 15.
Unitary Products Group
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