Bard Bayrd Furnace 403293A - Manual (Page 15)

with louvvrs or grilles closed could cause Inadequate
combustion or ventilation air, resulting In Injury or
death.
C. Installing furnace in unconfIned space.
Refer to current National Fuel Gas Code ANSI 2223.1/
NFPA 54 for more information. This code does not re­
quire that you make special provisions for combustion
and ventilation when furnace is in an unconfined space.
However, it is always prudent to arrange for combustion
and ventilation air as if installation space is confined
space.
In the past, infiltration through loose construction pro­
vided enough air for combustion and ventilation when
furnace was in an unconfined space. Current construction
methods may now prevent infiltration of air into unconfined
space. These current methods include increased insula­
tion, vapor barriers, tight fitting doors and windows, and
weather-stripping.
D. Allowing for exhauet fan operation.
1, When furnace is in a ventilated attic, crawl space,
residertce garage, or outside the heated space, ex­
haust fan drafts can adversely affect its operation.
These drafts can come from kitchens, bathrooms,
clothes dryers or anywhere within the heated space.
WARNING: Exhaust fans that blow against fur­
nace could cause heat exchanger failure or fire,
resulting In damage, Injury, or death.
2. When furnace is in a repair garage or inside the
heated space, exhaust fans can adversely affect its
operation. Exhaust fans in kitchens, bathrooms,
clothes dryers or anywhere within heated space in­
crease combustion and ventilation air requirements.
This is because exhaust fans reduce the amount of
combustion and ventilation air available to the fur­
nace. A fireplace also reduces amount of combus­
tion and ventilation air. You must allow for these
reductions.
WARNING: You must allow for reduction of air
available for combustion and ventilation by ex­
haust fans and fireplaces. Failure to do so could
result In Inadequate combustion and ventilation
sir. This could cause nausea, asphyxiation, or
firs, resulting In damage, Injury, or death.
3. Exhaust fan air may contain compounds of chlorine,
fluorine, bromine, and iodine. If used for combus­
tion, this contaminated air will adversely affect fur­
nace operation.
WARNING: If used for combustion and ventila­
tion, contaminated exhaust fan air could cause
heat exchanger or vent system failure resulting
In damage, Injury, or death.
SICTION 9 —
PROVIDING P INTING.
13
Vent furnace using these instructions and Venting Adden­
dum. Also, meet requirements of local utilities and other local
code authorities. You must connect furnace to a vent or fac­
tory-built chimney or a suitably sized, constructed and lined
masonry chimney. Vent or factory-built chimney must meet a
recognized standard. Chimney lining method and material
must comply with local requirements. Use corrosion-resistant
material meeting nationally recognized standards for vent
construction.
WARNING: Inadequate vent or chimney could allow
combustion products to collect In structure, resulting In
Injury or death.
WARNING: Vent this furnace separately from any appli­
ance designed to burn solid fuel, particularly wood-burn-
Ing or coal burning appliances. Improper venting could
allow combustion products to collect In structure, result­
ing In injury or death.
A. Venting category.
The furnaces covered by this manual are design-certified
as CATEGORY 1 for venting, CATEGORY 1 furnaces
have non-positive vent static pressure and rely on the
beat content of combustion products to vent. You may
common vent CATEGORY 1 furnaces.
The furnaces covered in this manual are also design-
certified as CATEGORY 3 for venting, only when they
are installed with manufacturer specified vent system
components and installation practices.
Category 3 gas appliances rely on the heat content of
combustion products and mechanical or other means to
vent. You may not common vent CATEGORY 3 gas ap­
pliances.
B. Types of vent systems.
These definitions will help you understand the terms we
use.
1. "Vent" and "chimney" refer to open passageways.
These passageways convey vent gases from vent
connectors to the outside. Gases begin their final
ascent at the vent or chimney. Vents and chimneys
usually run vertically or nearly vertical. When they
serve only one gas appliance, they are called "dedi­
cated" vents or chimneys. Whan they serve multiple
gas appliances, they are called "common" vents or
chimneys.
2. A "vent connector" connects a gas appliance to a
vent or chimney. Vent connectors usually run directly
from the furnace draft inducer collar to vent or chim­
ney. Vent connectors may have vertical and horizon­
tal runs.
3. A "venting system" is a continuous open passage­
way from the draft inducer collar to the outside.
Venting systems usually have vent connector(s) and
a vent or chimney. Venting systems commonly serve
a single furnace or a single furnace and a water
heater. Other multiple-appliance venting systems are
less common.