Carrier 58 Series - Manual

Number One
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Carrier Corporation
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Carrier Parkway • Syracuse NY 13221
Procedures for Gas-Fired Furnaces
INTRODUCTION
The Need for Adequate Combustion Air —
Modern construction methods involve greater use of
insulation, improved vapor barriers and weather­
stripping, with the result that both apartments and
single-family residences generally are much tighter
structurally than they have been in the past.
Combustion air supply for gas-fired equipment can
be affected by these construction conditions, be­
cause infiltration that existed in the past may not
now be adequate. Extensive use of kitchen and bath­
room exhaust fans, and even fireplaces, aggravates
the situation.
Today’s building practices invalidate the old rule
of thumb of “one air change by infiltration.” Reli­
ance on this practice can result in combustion air
starvation if proper combustion air is not provided.
In fact, recent field investigations, particularly with
closet installation of gas-fired furnaces, indicate the
need for positive provision for combustion air and
for a better understanding of application guidelines
that relate to today’s conditions.
These instructions cover minimum combustion
air requirements and venting practices, reflect
current conditions found in the field, and conform
to existing national standards and safety codes. In
some instances, these instructions exceed certain
local codes and ordinances, especially those that
may not have kept pace with the changing resi­
dential construction practices. Carrier requires these
standard procedures as a minimum for a safe
installation.
CAUTION: Do not obstruct openings in front
of the furnace or in the top on each side of the
vent pipe. These provide air for combustion and
ventilation. Never store anything on or in con­
tact with the furnace such as;
Spray or aerosol cans, rags, brooms, dust mops,
vacuum cleaners, or other cleaning tools.
Soap powders, bleaches, waxes or other clean­
ing compounds, plastic or plastic containers,
gasoline, kerosene, cigarette lighter fluid, dry
cleaning fluids, or other volatile fluids.
Paint ihinners and other painting compounds,
paper bags or other paper products.
Installation Procedures — The following recom­
mendations apply to the installation and operation
of gas furnaces and piping systems for natural and
LP gases. Use these procedures in conjunction with
the specific furnace installation instructions.
Refer also to the regulations of the serving gas
supplier and the local building, heating, plumbing
or other codes in effect in the area in which the
installation is made.
Portions of the following have been adopted in
part from the “National Fuel Gas Code” (NFPA
No. 54-1980 or ANSI Z223.I-I980) copyrighted by
the National Fire Protection Association and
American Gas Association. For further details, con­
sult this publication or current edition available
from NFPA, 470 Atlantic Avenue, Boston, MA
02210, or American Gas Association, 1515 Wilson
Boulevard, Arlington, VA 22209.
These instructions contain the following sections:
Page
Inspection ............................................................... 1
Location and Air for Combustion
and Ventilation.................................................. I
Gas Piping.............................................................. 4
Venting..................................................................... 4
Electrical.................................................................. 5
Start-Up, Adjustment, and Safety Check . . . . 5
Furnace Location with Respect to
Cooling Equipment........................................... 7
Special Locations ................................................... 7
INSPECTION
Check the available power supply to be sure that
it meets the specifications on the wiring diagram
and all motors in the furnace.
Check the available gas supply to see that it con­
forms to the gas specification on the AGA rating
plate.
LOCATION AND AIR FOR COMBUSTION
AND VENTILATION
Locate the furnace close to the chimney and as
near the center of the air distribution system as
possible. Provide ample space for servicing and
cleaning. Always comply with minimum fire protec­
tion clearances shown on the unit rating plate. Do
not install directly on carpeting, tile or any com­
bustible material other than wood flooring. If base
for combustible floor is required, obtain from
Carrier distributor or dealer.
© Carrier Corporation 1982 Form 58-9XA