IO137 5
These Installation and Operating Instructions are intended for use by fully qualified installation
technicians. Some localities require the installer/servicer to be licensed. If in doubt, check with local
authorities.
INSTALLATION: In the USA this furnace must be installed according to the latest edition of the
ANSI Z223.1 booklet entitled “National Fuel Gas Code” (NFPA 54), and the requirements or codes
of the local utility or other authority having jurisdiction. In Canada this furnace must be installed ac-
cording to the current CAN/CGA-B149.1 & 2 Gas Installation Codes, local plumbing or waste water
codes and other applicable codes.
Additional helpful publications available from the NFPA are, NFPA 90A - Installation of Air Condi-
tioning and Ventilating System, and NFPA 90B - Warm Air Heating and Air Conditioning System.
These publications are available from:
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
ANNUAL inspection of the furnace and its vent system is strongly recommended. It is the installer's
responsibility to inform the user of this importance.
These series of furnaces meet the California NO
X
emission standards and California seasonal effi-
ciency standards.
LOCATION
DO NOT install this furnace in a mobile home. This furnace is designed only for installation in build-
ings constructed on site and connected to ductwork. When installed in a utility room or closet, the
door opening must be wide enough to allow the largest part of the furnace to enter, or to permit the
replacement of another appliance, such as a water heater.
DO NOT install outdoors. This furnace is designed to be installed indoors only. This furnace should
be installed in such a manner so that it is protected from water. If any components should become
submerged, replace those parts before returning the furnace to operation.
DO NOT use as a construction heater.
DO NOT install in a room used or designed to be used as a bedroom, bathroom or storage closet,
or in any enclosed space with access only through such a room or space.
MINIMUM CLEARANCES TO COMBUSTIBLE SURFACES
Unobstructed front clearance of 24” for servicing is recommended.
VENT SIDES FRONT BACK TOP
B1-VENT SINGLE (PLENUM)
1” 6” 1” 3” 0” 1”
Top clearance for horizontal configuration - 1”.
Line contact to framing is permitted when installed in the horizontal configuration. Line contact is
defined as the portion of the cabinet that is formed by the intersection of the top and side.
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