4
13. These furnaces SHALL NOT be installed directly on carpet-
ing, combustible tile, or any other combustible material oth-
er than wood flooring. In downflow installations, factory
accessory floor base MUST be used when installed on com-
bustible materials and wood flooring. Special base is not re-
quired when this furnace is installed on manufacturer’s Coil
Assembly Part No. CNRV, CNPV, CAP, or CAR or when
Coil Box Part No. KCAKC is used. See Table 2 for clear-
ance to combustible construction information.
Important Installation and Start--up Procedures
Failure to follow this procedure may result in a nuisance
smoke or odor complaint.
The manifold pressure, gas rate by meter clocking,
temperature rise and operation must be checked after
installation.
Minor smoke and odor may be present
temporarily after start--up from the manufacturing process.
Some occupants are more sensitive to this minor smoke and
odor. It is recommended that doors and windows be open
during the first heat cycle.
NOTICE
INTRODUCTION
The 4--way multipoise Category IV condensing furnace is CSA
design--certified for both
direct--vent (2-pipe) and ventilated
combustion air venting installations. See Fig. 2. The furnace is
factory--shipped for use with natural gas. The furnace can be
converted in the field for use with propane gas when a
factory-supplied conversion kit is used. Refer to the furnace rating
plate for conversion kit information.
This furnace is not approved for installation in mobile homes,
recreational vehicles, or outdoors.
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. 3.
The furnace should be sized to provide 100 percent of the design
heating load requirement plus any margin that occurs because of
furnace model size capacity increments. Heating load estimates can
be made using approved methods available from Air Conditioning
Contractors of America (Manual J); American Society of Heating,
Refrigerating, and Air--Conditioning Engineers; or other approved
engineering methods. Excessive oversizing of the furnace could
cause the furnace and/or vent to fail prematurely.
For accessory installation details, refer to the applicable instruction
literature.
NOTE
: Remove all shipping materials, loose parts bag, and
literature before operating the furnace. See Table 1.
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:
Safety
S
US: National Fuel Gas Code (NFGC) NFPA 54--2012/ANSI
Z223.1--2012 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANSI/NFPA 90B
S
CANADA: National Standard of Canada, Natural Gas and
Propane Installation Code (NSCNGPIC) CAN/CSA
B149.1--2010
General Installation
S
US: 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
S
CANADA: NSCNGPIC. For a copy, contact Standard Sales,
CSA International, 178 Rexdale Boulevard, Etobicoke
(Toronto), Ontario, M9W 1R3, Canada
Combustion and Ventilation Air
S
US: Section 9.3 of the NFPA54/ANSI Z223.1--2012 Air for
Combustion and Ventilation
S
CANADA: Part 8 of the CAN/CSA B149.1--2010, Venting
Systems and Air Supply for Appliances
Duct Systems
S
US and CANADA: 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) 2005
Fundamentals Handbook Chapter 35
Acoustical Lining and Fibrous Glass Duct
S
US and CANADA: current edition of SMACNA, NFPA 90B as
tested by UL Standard 181 for Class I Rigid Air Ducts
Gas Piping and Gas Pipe Pressure Testing
S
US: NFPA 54/ANSI Z223.1--2012 NFGC; Chapters 5, 6, 7, and 8
and national plumbing codes.
CANADA: CAN/CSA--B149.1--2010, Parts 4, 5, 6, and 9.
In the state of Massachusetts:
S
This product must be installed by a licensed plumber or gas fitter.
S
When flexible connectors are used, the maximum length shall
not exceed 36 in. (914 mm).
S
When lever type gas shutoffs are used they shall be T--handle
type.
S
The use of copper tubing for gas piping is not approved by the
state of Massachusetts.
Electrical Connections
S
US: National Electrical Code (NEC) NFPA 70--2011
S
CANADA: Canadian Electrical Code CSA C22.1
Condensate Drain Connection
S
US: National Standard Plumbing Code 2009, Section 8.7.
S
Canada: National Plumbing Code of Canada 2010 in
Canada.
987MA
