Accoutrements HIGH ECONOMY GAS FURNACE 1200-103B User Manual
Page 3
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
COMBUSTION AND VENTILATION AIR
The
furnace
and
furnace
room
must
have
an
adequate
supply
of
air
for
safe
combustion
and
ventilation.
The
provisions
necessary
to
assure
an
adequate
air
supply
will
vary
depending
upon
differences
in
the
tightness
of
house
construction
and
in
the
location
of
the
furnace.
Methods
of
providing
air
from
some
typical
situations
are
described
below.
Consult
local
codes
and
ordinances
for
requirements
applicable
to
your
specific
furnace
installation
conditions
and
comply
with
them.
In
the
absence
of
local
codes
and
ordinances,
comply
with the National Fuat Gas Code, ANSI Z223.1-19B0.
EXAMPLE I - FURNACE LOCATED IN AN UNCONFINED SPACE
A.
If
the
furnace
is
located
in
a
basement
or
other
large,
open
area
of
a
conventionally
built
house
(loose
construction),
the
air
that
leaks
into
the
building
normally
will provide an adequate air supply.
B.
If
the
furnace
is
located
in
a
tightly
constructed
building
(storm
windows,
weather
stripping,
cracks
caulked,
etc.)
an
outdoor
air
intake
must
be
provided.
Example
2,
Section B, shows a typical method.
EXAMPLE 2 - FURNACE LOCATED IN A CONFINED SPACE
A. When the furnace is in a closet or utility room, install two
open grilles In a wall or door opening to the rest of the
house. One square inch for each 1000 Btu/h of total input
rating of all gas appliances in the confined space. Refer to
Figure
~T,
The
grilles
must
communicate
with
other
open
areas having adequate air infiltration from outdoors.
If
the
building
is
tightly
constructed,
not
enough
outside
air
may
enter
for
safe
combustion.
Install
a
fresh
air
duct
from
a
point
near
the
burners
to
the
outside
or
to
a
ventilated
attic
or
crawl
space.
Refer
to
Figure
3.
This
duct must have a free area of at least one square inch for
each 4,000 Btu/h of total Input of aii gas appliances in the
space.
The
minimum
dimension
of
a
rectangular
duct
must
not be lass than three inches.
CAUTION:
WHEN
A
FURNACE
IS
INSTALLED
IN
A
CLOSET
OR UTILITY ROOM, NEVER USE THIS ROOM AS A
RETURN AIR PLENUM.
FIGURE 2 — FURNACE LOCATED IN CONFINED SPACE
FIGURE 3 — FRESH AIR DUCT FOR TIGHTLY SEALED
BUILDING
This
furnace
must
be
vented
directly
to
the
outside
through
a
suitable
chimney.
This
furnace
as
shipped
from
the
factory
is
suitable
for
a
^dicated
flue
only.
It
should
not be
vented
and
terminated
horizontally
through
a
side
wall
and
Is
not
suitable
for
use
with
plastic
pip*-
tffth"^'the
"
addition
of
optional
field-in
stalled
Common
voting
Kit
8620-005
or
-006,
it
is
suitable
to
common
vent
thia
furnace
along
with
another
gas
burning
appliance
to
a
single
chimney
for
eese
of
installation.
Refer
to
section
on
Comann
Venting
beginning
on
page
11
of
this
instruction
manual
for
complete
details.
The
vent
must
be
installed
in
compliance
with
the
National
Fuel
Gas
Coda
(ANSI
Standard Z223. 1-1980, ] and these instructions.
GENERAL INSTRUCTIONS
1.
The
vent
connector
must
be
aluminum
pipe
and
shall
be
the same siia as the flue outlet on the furnace. Keep the
vent
as
short
and
direct
as
possible.
Type
B-1
pipe
is
recommended.
2.
Maintain
a
minimum
clearance
of
6"
(1" for
B-1)
to
any
portion
of
the
vent
connector
from
any
adjacent
combustible
materials.
Single
wall
vent
connector
is
permitted only within the same space (room or area] at the
furnace.
B-1
vent
is
required
whenever
the
vent
is
enclosed
or
passes
through
floors,
walls,
ceilings,
roofs
or
furred-out
spaces.
Joists,
studs,
floors,
dry
wall,
paneling,
sheeting,
rafters,
roofing
and
other
matcriais
classified
as
combustibia
must
not
be
closer
than
1“
clearance to the B-1 vent.
3.
If connected into masonry chimney, the vent pipe must be
inserted
into,
but
not
beyond
the
inside
wall
of
the
chimney.
4.
The gas vent must extend at least 2 feet above the highest
point
where
it
passes
through
the
roof
of
a
building
(3
feet
for
a
chimnay]
and
at
least
1
foot
hlghar
than
any
portion
of
a
building
within
a
horizontal
distance
of
10
feet. See Figure 4.
5.
The
vent
pipe
system
shall
be
installed
so
as
to
avoid
excessive
turns
which
create
unnecessary
resistance
to
flow of vent gases.