Bryant 312AAV - Manual (Page 4)

CAUTION: Application of this furnace should be in-
doors with special attention given to vent sizing and
material, gas input rate, air temperature rise, and unit
sizing. Improper installation or misapplication may re-
quire excessive servicing or cause premature component
failure.
WARNING: Improper installation, adjustment, alter-
ation, service, maintenance, or use can cause carbon
monoxide poisoning, explosion, fire, electrical shock, or
other conditions which may cause personal injury or
property damage. Consult a qualified installer, service
agency, local gas supplier, or your distributor or branch
for information and assistance. The qualified installer or
agency must use only factory-authorized and listed kits or
accessories when modifying this product.
Failure to follow this warning could result in electrical
shock, fire, personal injury or death.
This furnace is designed for minimum continuous return-air
temperature of 60°F db or intermittent operation down to 55°F db.
Return-air temperature must not exceed 85°Fdb. (See Fig. 3.)
For accessory installation details, refer to the applicable instruction
literature.
NOTE: Remove all shipping brackets and materials before oper-
ating the furnace.
CODES AND STANDARDS
Follow all national and local codes and standards in addition to
these instructions. The installation must comply with regulations
of the serving gas supplier, local building, heating, plumbing, and
other codes. In absence of local codes, the installation must
comply with the national codes listed below and all authorities
having jurisdiction.
In the United States and Canada, follow all codes and standards for
the following:
I. SAFETY
• US: National Fuel Gas Code (NFGC) NFPA 54–1999/ANSI
Z223.1–1999 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANSI/NFPA 90B
• CANADA: CAN/CGA-B149.1–and .2–M95 National Standard
of Canada. Natural Gas and Propane Installation Codes (NSC-
NGPIC)
II. GENERAL INSTALLATION
• US: Current edition of the NFGC and the NFPA 90B. For
copies, contact the National Fire Protection Association Inc.,
Batterymarch Park, Quincy, MA 02269; or for only the NFGC,
contact the American Gas Association, 400 N. Capitol, N.W.,
Washington DC 20001
• CANADA: NSCNGPIC. For a copy, contact Standard Sales,
CSA International, 178 Rexdale Boulevard, Etobicoke (Tor-
onto), Ontario, M9W 1R3 Canada
III. COMBUSTION AND VENTILATION AIR
• US: Section 5.3 of the NFGC, Air for Combustion and
Ventilation
• CANADA: Part 7 of NSCNGPIC, Venting Systems and Air
Supply for Appliances
IV. DUCT SYSTEMS
• US and CANADA: Air Conditioning Contractors Association
(ACCA) Manual D, Sheet Metal and Air Conditioning Con-
tractors National Association (SMACNA), or American Soci-
ety of Heating, Refrigeration, and Air Conditioning Engineers
(ASHRAE) 1997 Fundamentals Handbook Chapter 32.
V. ACOUSTICAL LINING AND FIBROUS GLASS DUCT
• US and CANADA: current edition of SMACNA and NFPA
90B as tested by UL Standard 181 for Class I Rigid Air Ducts
VI. GAS PIPING AND GAS PIPE PRESSURE TESTING
• US: NFGC; chapters 2,3,4, and 9 and National Plumbing Codes
• CANADA: NSCNGPIC Part 5
VII. ELECTRICAL CONNECTIONS
• US: National Electrical Code (NEC) ANSI/NFPA 70–1999
• CANADA: Canadian Electrical Code CSA C22.1
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE
Use this procedure for all installed and uninstalled furnaces. An
ESD service kit (available from commercial sources) may be used
to prevent ESD damage.
CAUTION: Electrostatic discharge can affect electronic
components. Follow the Electrostatic Discharge Precau-
tions Procedure listed below during furnace installation
and servicing to protect the furnace electronic control.
Precautions will prevent electrostatic discharges from
personnel and hand tools which are held during the
procedure. These precautions will help to avoid exposing
the control to electrostatic discharge by putting the
furnace, the control, and the person at the same electro-
static potential.
1. Disconnect all power to the furnace. Multiple disconnects
may be required. DO NOT TOUCH THE CONTROL OR
ANY WIRE CONNECTED TO THE CONTROL PRIOR
TO DISCHARGING YOUR BODY’S CHARGE TO
GROUND.
2. Firmly touch a clean, unpainted metal surface on the
furnace chassis close to the control. Tools held in hand
during grounding will be discharged.
3. You may proceed to service the control or connecting wires
as long as you do nothing to recharge your body (moving or
shuffling feet, touching ungrounded objects, etc.)
4. If you touch ungrounded objects, firmly touch a clean,
unpainted metal surface again before touching control or
wires.
Fig. 3–Return Air Temperature
A93042
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