4
INTRODUCTION
The 4--way multipoise Category I fan--assisted furnace is CSA
(formerly A.G.A. and C.G.A.) design--certified. A Category I
fan--assisted furnace is an appliance equipped with an integral
mechanical means to either draw or force products of combustion
through the combustion chamber and/or heat exchanger. The
furnace is factory--shipped for use with natural gas. This furnace
is not approved for installation in mobile homes, recreational
vehicles, or outdoors.
60
80
/ 27 C
/ 16 C
A06745
Fig. 2 -- Return Air Temperature
This furnace is designed for minimum continuous return--air
temperature of 60
_
F (15
_
C) db or intermittent operation down to
55
_
F (13
_
C)db such as when used with a night setback
thermostat. Return--air temperature must not exceed 80
_
F (27
_
C)
db. Failure to follow these return--air temperature limits may
affect reliability of heat exchangers, motors, and controls. (See
Fig. 2.)
For accessory installation details, refer to the applicable
instruction literature.
NOTE
: Remove all shipping brackets and materials before
operating 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, follow all codes and standards for the
following:
Safety
NFPA 54/ANSI Z223.1--2012 and the Installation Standards,
Warm Air Heating and Air Conditioning Systems ANSI/NFPA
90B .
General Installation
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
Section 9.3 NFPA 54/ANSI Z223.1--2012, Air for Combustion
and Ventilation .
Duct Systems
Air Conditioning Contractors Association (ACCA) Manual D,
Sheet Metal and Air Conditioning Contractors National
Association (SMACNA), or American Society of Heating,
Refrigeration, and Air Conditioning Engineers (ASHRAE) 2001
Fundamentals Handbook Chapter 35 or 2005 HVAC Systems
and Equipment Handbook Chapters 9 and 16.
Acoustical Lining and Fibrous Glass Duct
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
NFPA 54/ANSI Z223.1--2012 ; chapters 5, 6, and 7 and National
Plumbing Codes .
Electrical Connections
National Electrical Code (NEC) ANSI/NFPA70--2011 .
Venting
NFPA 54/ANSI Z223.1--2012; chapters 12 and 13.
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS PROCEDURE
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit component
damage.
Electrostatic discharge can affect electronic components.
Take precautions 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.
CAUTION
!
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
ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the fur-
nace chassis which is close to the control. Tools held in a
person’s hand during grounding will be satisfactorily dis-
charged.
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.).
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