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Safety signal words are used to designate a degree or
level of seriousness associated with a particular hazard.
The signal words for safety markings are WARNING and
CAUTION.
a. WARNING indicates a potentially hazardous situa-
tion which, if not avoided, could result in death or
serious injury.
b. CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or mod-
erate injury. It is also used to alert against unsafe
practices and hazards involving only property dam-
age.
▲
WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could re-
sult in serious injury, death or property damage.
Improper servicing could result in dangerous opera-
tion, serious injury, death, or property damage.
GENERAL INSTALLATION INSTRUCTIONS
The manufacturer assumes no responsibility for equip-
ment installed in violation of any code or regulation.
It is recommended that Manual J of the Air Condition-
ing Contractors Association (ACCA) or A.R.I. 230 be fol-
lowed in estimating heating requirements. When esti-
mating heating requirements for installation at alti-
tudes above 2000 ft., remember the gas input may need
to be reduced (See High Altitude Installation).
Material in this shipment has been inspected at
the factory and released to the transportation
agency without known damage. Inspect exterior
of carton for evidence of rough handling in ship-
ment. Unpack carefully after moving equipment
to approximate location. If damage to contents is
found, report the damage immediately to the de-
livering agency.
Codes and local utility requirements governing the
installation of gas fired equipment, wiring, plumbing,
and flue connections must be adhered to. In the ab-
sence of local codes, the installation must conform with
latest edition of the National Fuel Gas Code ANSI
Z223.1 • National Installation Code, CAN/CGA B149.1.
The latest code may be obtained from the American Gas
Association Laboratories, 400 N. Capitol St. NW,
Washington D.C. 20001.
1-800-699-9277 or www.aga.org
These furnaces have been classified as CATEGORY IV
furnaces in accordance with latest edition of ANSI
Z21.47 • CAN/ CGA 2.3 standards.
18-CD19D6-32
Installer's Guide
Contents
INSTALLATION INSTRUCTIONS
General Installation Instructions
Downflow Installation
Horizontal Installation
Duct Connections
General Venting Instructions
Venting Material
Venting Through The Roof
Venting Through a Masonry Chimney
Field Wiring Diagrams
Combustion Input Checks
Preliminary Inspections
Lighting Instructions
Control And Safety Switch Adjustments
Airflow Adjustment
IFC Error Flash Code
Category IV furnaces operate with positive vent static
pressure and with a flue loss less than 17 percent.
These conditions require special venting systems, which
must be gas tight and water tight. These Category IV
Direct Vent furnaces are approved for installation in
Manufactured/
Mobile
BAYMFGH100A.
housing
when
used
with
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