6
• Furnace doors must be in place on the furnace while
the furnace is operating in any mode.
Damage or repairs due to failure to comply with these re-
quirements are not covered under the warranty.
NOTE: The Commonwealth of Massachusetts re
-
quires that the following additional requirements
must also be met:
• Gas furnaces must be installed by a licensed plumber
or gas fitter.
• A T-handle gas cock must be used.
• If the unit is to be installed in an attic, the passageway
to and the service area around the unit must have
flooring.
WARNING
To prevent property damage, personal injury or death due to
fire, do not install the furnace in a mobile home, trailer, or
recreational vehicle.
To ensure proper furnace operation, install, operate and
maintain the furnace in accordance with these installa-
tion and operation instructions, all local building codes
and ordinances.
In their absence, follow the latest edition of
the National Fuel Gas Code (NFPA 54/ANSI Z223.1), and/or
CAN/CSA B149 Installation Codes, local plumbing or waste
water codes, and other applicable codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI
Z223.1) can be obtained from any of the following:
American National Standards Institute
25 West 43rd Street, 4th Floor
New York, NY 10036
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02169
CSA International
8501 East Pleasant Valley
Cleveland, OH 44131
The rated heating capacity of the furnace should be greater
than or equal to the total heat loss of the area to be heat-
ed. The total heat loss should be calculated by an approved
method or in accordance with “ASHRAE Guide” or “Manual
J-Load Calculations” published by the Air Conditioning Con-
tractors of America.
In the USA, this furnace MUST be installed in accordance
with the latest edition of the ANSI Z223.1 booklet entitled
“National Fuel Gas Code” (NFPA 54), and the requirements
or codes of the local utility or other authority having jurisdic-
tion. Additional helpful publications available from the NFPA
are, NFPA 90A - Installation of Air Conditioning and Ventilat-
ing System and NFPA 90B - Warm Air Heating and Air Con
-
ditioning System.
All venting shall be in accordance with the National Fuel Gas
Code, ANSI Z223.1, or applicable local building and/or air
conditioning codes.
NOTE: Furnaces with NOx screens meet the Califor
-
nia NOx emission standards and California seasonal
efficiency standards. ANNUAL inspections of the fur
-
nace and its vent system is strongly recommended.
LOCATION REQUIREMENTS AND
CONSIDERATIONS
*MES80 models are approved for up flow and horizontal
(left or right side down) installation. *CES80 models are ap-
proved for down flow and horizontal (left or right side down)
installation.
WARNING
To prevent possible equipment damage, property damage,
personal injury or death, the following bullet points must be
observed when installing this unit.
Follow the instructions listed below when selecting a furnace
location. Refer also to the guidelines provided in
Combustion
and Ventilation Air Requirements.
• Centrally locate the furnace with respect to the pro-
posed or existing air distribution system.
• Ensure the temperature of the return air entering the
furnace is between 55°F and 100°F when the furnace
is heating.
• If the furnace is installed in an application where the
typical operating sound level of a furnace is deemed
objectionable, an optional sound reduction kit is avail-
able. Consult your local distributor for more details.
• Provisions must be made for venting combustion prod-
ucts outdoors through a proper venting system. The
length of flue pipe could be a limiting factor in locating
the furnace.
• Ensure adequate combustion air is available for the
furnace. Improper or insufficient combustion air can
expose building occupants to gas combustion products
that could include carbon monoxide. Refer to
Combus
-
tion and Ventilation Air Requirements.
• The furnace must be level. If the furnace is to be set
on a floor that may become wet or damp at times,
the furnace should be supported above the floor on a
concrete base sized approximately 1-1/2” larger than
the base of the furnace.
•
Ensure upflow or horizontal furnaces are not installed
directly on carpeting, or any other combustible materi-
al. The only combustible material allowed is wood.
• Exposure to contaminated combustion air will result in
safety and performance-related problems. Do not in-
stall the furnace where the combustion air is exposed
to the following substances:
