Lennox MPGA 050 B3, Application Manual

Page: 32 / 37

Maintenance Of Your Furnace
Always shut off all power to the unit before
attempting any of the following maintenance
procedures. Failure to do so may result in personal
injury.
There are routine maintenance steps you should take to
keep your furnace operating efficiently. This maintenance
will assure longer life, lower operating costs, and fewer
service calls. In addition to the maintenance procedures
listed in this manual, there are also other service and
maintenance procedures that require the skills of a
service person who has specialized tools and training.
(See "Servicing the Furnace" section of the Installation
and Servicing part of this booklet.)
Personal injury can
result if you are not qualified to do this work. Please
call your dealer when service is needed.
Cleaning
The cabinet of the furnace can be cleaned with soap and
water. Grease spots can be removed with a household
cleaning agent. The cabinet can be kept attractive by
polishing with automotive wax at least twice a year.
Installations Around Insulation
Insulating materials may be combustible. Therefore, a
furnace installed in an attic or other insulated space must
be kept free and clear of insulating materials. Make sure
to examine the furnace area when the furnace is installed
or additional insulation has been added.
Periodic Inspections
Your gas furnace is designed to give many years of
efficient, satisfactory service. However, the varied air
pollutants commonly found in most areas can affect
longevity and safety. Chemicals contained in everyday
household items such as laundry detergents, cleaning
sprays, hair sprays, deodorizers, and other products
which produce airborne residuals may have an adverse
affect upon the metals used to construct your appliance.
It is important that you conduct periodic physical
inspections of your appliance, paying special attention to
the gas burner and the flue outlet from the furnace.
These components are located at the front of the unit. A
flashlight will be useful for these inspections. Make one
inspection prior to the beginning of the heating season
and another during the middle.
Should you observe unusual amounts of any of the
following conditions, it is important that you call your
authorized dealer at once to obtain a qualified service
inspection:
• Rust, flakes, or other deposits
• Coatings
• Corrosion
Even if no unusual rust or other conditions are observed,
it is recommended that the furnace be inspected and
serviced at least once per year by a qualified service
technician.
Regular inspection and planned
maintenance will assure many years of economical
performance from your gas furnace.
Combustion Air
Adequate combustion and ventilation air must reach
your gas furnace to provide for proper and safe
operation. Do not block or obstruct air openings on
the furnace, air openings communicating with the
area in which the furnace is installed and the
spacing around the furnace. Any obstruction of this
airflow can cause an unsafe condition which may
result in death or permanent injury.
Furnaces located in a closet, alcove, or utility room must
have provision for adequate air supply by means of upper
and lower grilles in the door, or by the introduction of
outside air, or both. National Fuel Gas Code, ANSI
Z223.1 (latest edition), CAN/CGA B149.1 & .2 Installation
Codes (latest edition), and local requirements are
generally alike. However, local codes take precedence.
Venting and Furnace Support
Venting of this furnace must comply with our published
instructions. Be sure the installer has followed these
requirements. If not, you should request the installer to
comply as soon as possible.
For your safety, please note the following:
1. 80% furnaces may be common vented with another
appliance in certain circumstances. Refer to the
installation instructions and Category I Venting
Tables, Nationa Fuel Gas Code ANSI Z223.1 (latest
edition), for proper installation guidelines. In Canada,
see CAN/CGA B149.1 & .2 Installation Codes (latest
edition).
2. This furnace is not designed for use with a vent
damper. Use of such a device will not improve the
efficiency of this furnace.
20541401 Issue 0229 Page 4 of 6