Safety Instructions - Lennox Merit Series User's Information Manual

CAUTION
!
Before attempting to perform any service or
maintenance, turn the electrical power to unit
OFF at the disconnect switch.
WARNING
!
Do not set thermostat below 60°F (16°C) in
heating mode. Setting thermostat below 60°F
(16°C) reduces the number of heating cycles.
Damage to the unit may occur that is not
covered by the warranty.
WARNING
!
If overheating occurs or if gas supply fails to
shut off, shut off the manual gas valve to the
furnace before shutting off electrical supply.
WARNING
!
Do not use this furnace if any part has been
underwater. A flood−damaged furnace
is extremely dangerous. Attempts to use
the furnace can result in fire or explosion.
Immediately call a licensed professional
service technician (or equivalent) to inspect
the furnace and to replace all gas controls,
control system parts, and electrical parts that
have been wet or to replace the furnace, if
deemed necessary.
NOTICE
!
Any additions, changes, or conversions
required in order for the appliance to
satisfactorily meet the application needs must
be made by a licensed professional installer
(or equivalent) using factory-specified and
approved parts.
WARNING
!
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed
by a licensed professional installer (or
equivalent), a service agency, or the gas
supplier.

SAFETY INSTRUCTIONS

1. Keep the furnace area clear and free of combustible
material, gasoline, and other flammable vapours and
liquids. If it is installed in an insulated area, the furnace
must be kept free of insulating material. Insulating
material may be combustible.
2. After any heavy snow, ice or frozen fog event, the furnace
vent pipes may become restricted. Always check the
vent system and remove any snow or ice that may be
obstructing the plastic intake or exhaust pipes.
3. DO NOT obstruct air flow to unit. Unit must receive an
unobstructed flow of combustion and ventilating air. DO
NOT block or obstruct air openings on the furnace or air
openings to the area in which the furnace is installed.
Take care to maintain established clearances surrounding
the furnace.
4. DO NOT store chlorine or fluorine products near unit or
introduce these products into the combustion air. These
products can cause furnace corrosion.
5. DO NOT draw return air from a room where this
furnace, or any other gas appliance (ie., a water
heater), is installed. When return air is drawn from a
room, a negative pressure is created in the room. If a gas
appliance is operating in a room with negative pressure,
the flue products can be pulled back down the vent
pipe and into the room. This reverse flow of the flue gas
may result in incomplete combustion and the formation
of carbon monoxide gas. This toxic gas might then be
distributed throughout the house by the furnace duct
system.
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