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VENTING
NOTE:
Planning
for the venting
system
should
be
done
in
conjunction
with planning
for the ductwork,
drainage,
and furnace
accessories,
such as air cleaners
and humidifiers.
Begin assembling
the venting
system
AFTER
the furnace
is set in place
in the
required
orientation.
Venting
for this furnace
shall follow
all Local codes for Category
IV venting
systems.
NOTE:
THESE
INSTRUCTIONS
DO
NOT
CONTAIN
DETAILED
INSTALLATION
INSTRUCTIONS
FOR
POLYPROPYLENE
VENTING
SYSTEMS.
Refer
to
the
polypropylene
venting
system
manufacturer's
installation
instructions
for the polypropylene
venting
system
installation.
NOTE:
When
using
polypropylene
venting
systems,
all venting
materials
used,
including
the vent terminations,
must be from the
same manufacturer.
General
If this furnace
replaces
a furnace
that was
connected
to a vent
system
or chimney,
the vent or vent connectors
of other remaining
appliances
may
need
to
be
re-sized.
Vent
systems
or
vent
connectors
of other
appliances
must be sized to the minimum
size
as determined
using
appropriate
table found
in the current
edition
of National
Fuel Gas Code NFPA 54/ANSI
Z-223.1.
An abandoned
masonry
chimney
may be used
as a raceway
for
properly
insulated
and
supported
combustion-air
(when
applicable)
and vent pipes.
Each furnace
must have its own set of
combustion-air
and vent pipes and be terminated
individually,
as
shown
in Fig. 48 for Direct
Vent (2-Pipe)
system,
or Fig. 49 for
single-pipe
or ventilated
combustion
air option.
A furnace
shall
not be connected
to a chimney
flue serving
a
separate
appliance
designed
to burn solid fuel.
Other gas appliances
with their own venting
system
may also use
the abandoned
chimney
as a raceway
providing
it is permitted
by
local code, the current
edition
of the National
Fuel Gas Code,
and
the vent or liner manufacturer's
installation
instructions.
Care must
be taken
to prevent
the exhaust
gases
from
one
appliance
from
contaminating
the combustion
air of other gas appliances.
Do not take combustion
air from
inside the chimney
when
using
ventilated
combustion
air or single-pipe
vent option.
These furnaces
can be vented as direct-vent
(two-pipe),
ventilated
combustion
air or non-direct
(single-pipe)
vent system.
Each type
of venting
system
is described
below.
Common
venting
between
these furnaces
or other appliances
is prohibited.
Materials
U.S.A.:
Combustion
air and vent
pipe,
fittings,
primers,
and
solvents
must
conform
to American
National
Standards
Institute
(ANSI)
standards
and American
Society
for Testing
and Materials
(ASTM)
standards.
See Table 13 for approved
materials
for use in
the U.S.A.
CARBON
MONOXIDE
POISONING
HAZARD
Failure
to follow
the steps outlined
below for each appliance
connected
to the venting
system
being
placed
into operation
could result in carbon monoxide
poisoning
or death.
The
following
steps
shall
be followed
for each appliance
connected
to the venting
system
being
placed
into operation,
while all other appliances
connected
to the venting
system
are
not in operation:
1. Seal any unused
openings
in venting
system.
2. Inspect
the
venting
system
for
proper
size
and
horizontal
pitch, as required
in the National
Fuel Gas
Code, ANSI
Z223.1/NFPA
54.
Determine
that there
is no blockage
or restriction,
leakage,
corrosion
and
other
deficiencies,
which
could
cause
an
unsafe
condition.
3. As
far
as practical,
close
all building
doors
and
windows
and all doors between
the space in which the
appliance(s)
connected
to
the
venting
system
are
located
and other spaces of the building.
4. Close fireplace
dampers.
5. Turn
on
clothes
dryers
and
any
appliance
not
connected
to the venting
system.
Turn on any exhaust
fans, such as range
hoods
and bathroom
exhausts,
so
they are operating
at maximum
speed. Do not operate
a summer
exhaust
fan.
6. Follow
the lighting
instructions.
Place
the appliance
being
inspected
into operation.
Adjust
the thermostat
so appliance
is operating
continuously.
7. Test for spillage
from draft hood equipped
appliances
at the draft
hood
relief
opening
after 5 minutes
of
main burner
operation.
Use the flame of a match
or
candle.
8. If improper
venting
is observed
during
any of the
above tests, the venting
system
must
be corrected
in
accordance
with
the National
Fuel
Gas Code,
ANSI
Z223.1/NFPA
54.
9. After
it has
been
determined
that
each
appliance
connected
to the venting
system
properly
vents when
tested
as outlined
above,
return
doors,
windows,
exhaust
fans,
fireplace
dampers
and
any
other
gas-fired
burning
appliance
to
their
previous
conditions
of use.
Venting
Systems
CARBON
MONOXIDE
POISONING
HAZARD
Failure
to follow
the instructions
outlined
below
for each
appliance
being
placed
into operation
could
result
in carbon
monoxide
poisoning
or death.
For all venting
configurations
for this appliance
and other gas
appliances
placed
into operation
for this structure,
provisions
for adequate
combustion,
ventilation,
and dilution
air must be
provided
in accordance
with:
U.S.A.
Installations:
Section
9.3 NFPA
54/ANSI
Z223.1
-2012,
Air
for Combustion
and Ventilation
and applicable
provisions
of the local building
codes.
36
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