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Fig. 3 - - Return Air Temperature
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, follow all codes and standards for the
following:
Safety
S
USA: National Fuel Gas Code (NFGC) NFPA
54- -2012/ANSI Z223.1- -2012 and the Installation Stan-
dards, Warm Air Heating and Air Conditioning Sys-
tems ANSI/NFPA 90B
General Installation
S
Current edition of the NFGC and the NFPA 90B. For
copies, contact the National Fire Protection Association
Inc., Batterymarch Park, Quincy, MA 02269;
(www.NFPA.org) or for only the NFGC, contact the
American Gas Association, 400 N. Capitol Street,
N.W., Washington, DC 20001 (www.AGA.org).
Combustion and Ventilation Air
S
NFGC NFPA54/ANSI Z223.1- -2012 Section 9.3, Air
for Combustion and Ventilation.
Duct Systems
S
Air Conditioning Contractors Association (ACCA)
Manual D, Sheet Metal and Air Conditioning Contract-
ors National Association (SMACNA), or American
Society of Heating, Refrigeration, and Air Condition-
ing Engineers (ASHRAE) 2005 Fundamentals Hand-
book Chapter 35 or 2004 HVAC Systems and Equip-
ment Handbook Chapters 9 and 16.
Acoustical Lining and Fibrous Glass Duct
S
Current edition of SMACNA and NFPA 90B as tested
by UL Standard 181 for Class I Rigid Air Ducts
Gas Piping and Gas Pipe Pressure Testing
S
NFGC NFPA54/ANSI Z223.1- -2012; chapters 5, 6, 7,
and 8 and National Plumbing Codes.
Electrical Connections
S
National Electrical Code (NEC) ANSI/NFPA 70- -2011.
Venting
S
NFGC NFPA 54 / ANSI Z223.1- -2012; Chapters 12
and 13.
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS PROCEDURE
!
FURNACE RELIABILITY HAZARD
Improper installation or service of furnace may cause
premature furnace component failure.
A02055
Electrostatic discharge can affect electronic components.
Follow the Electrostatic Discharge Precautions 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 electrostatic potential.
1. Disconnect all power to the furnace. Multiple disconnects
maybe required. DO NOT TOUCH THE CONTROL OR
ANY WIRE CONNECTED TO THE CONTROL PRIOR
TO
ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the fur-
nace chassis which is close to the control. Firmly touch
the clean, unpainted, metal surface of the furnace chassis
which is close to the control. Tools held in a person's hand
during grounding will be satisfactorily discharged.
3. After touching the chassis, you may proceed to service the
control or connecting wires as long as you do nothing to
recharge your body with static electricity (for example;
DO NOT move or shuffle your feet, do not touch un-
grounded objects, etc.).
4. If you touch ungrounded objects (and recharge your body
with static electricity), firmly touch a clean, unpainted
metal surface of the furnace again before touching control
or wires.
5. Use this procedure for installed and uninstalled (ungroun-
ded) furnaces.
6. Before removing a new control from its container, dis-
charge your body's electrostatic charge to ground to pro-
tect the control from damage. If the control is to be in-
stalled in a furnace, follow items 1 through 4 before
bringing the control or yourself in contact with the fur-
nace. Put all used and new controls into containers before
touching ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
5
CAUTION
DISCHARGING
YOUR
BODY'S
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