Bryant 394U - Unit Location and Clearance Requirements

LOCATING THE UNIT Ὃ
1. This gas furnace is approved for use on combus-
tible
floors
except
when
installed.as
a
counter-flow
furnace. When installed as a counter-flow furnace.
on a combustible floor it must be installed on an
approved base.
2. The furnace is A.G.A. er for the following
clearances from combustible construction in a clos-
et or alcove installation.
Sides.
.
...
...Q"
(1")*
Back.
.
.
.
.
.
.
0"
(1")*
t
Top
of
plenum.
.
.3"(0")*
Vent
connector
.
.6"(6")*
Front
......6"(6")*.
+ Figures shown in parentheses are approved clear-
ances when the furnace is installed as a counter-
flow furnace.
t Refer to ASA Z21.30-1964 for clearances in open
area installations.
3. Locate the furnace as close to the chimney as
possible. The furnace should also: be located as
centrally as possible to the distribution system.
4. Provide ample space for servicing and cleaning.
Consult your local approval agency or gas company
for any special clearance requirements. |
5. The furnace should. be level. Use shims as
required, 1f the floor or foundation i is not completely
level.
6. Advise owner to » leave all air passageways to
the furnace free of obstruction in order that there
will be no interference with combustion and venti-
lating air.
7. The furnace is designed for use. with summer air
conditioning. Therefore consideration should be
given to leaving ample space for a later installation .
of air conditioning equipment, if the air conditioning
equipment is not being installed as part of the orig-
inal furnace installation.
Bryant manufactures a coil box for upflow furnaces.
If air conditioning will be added at a later date, the
coil box, if installed on the original installation,
will save time and money later. A coil box is not
needed for counter-flow furnaces.
This
gas
furnace
is
not
approved
for
use
with
air
conditioning
units
mounted
upstream
from
the
fur-
.
nace
heat
exchanger.
The
cooling
coil
should
either
be
downstream
of
the
furnace
heat
exchanger
or
the
flow
of
cooling
air
should
be
by-passed
around
the
heat
exchanger.
If
this
parallel
arrangement
is
used,
dampers or other means used to control the flow
of
air
must
be
adequate
to
prevent
chilled
air
from.
entering the furnace. If these dampers are manually
operated, they must be equipped with means to pre-
vent operation of either unit unless the damper is
. in the full heat or full cool position.
8. In general, when the furnace is η, in a
large open space, there will be enough air for com-
" bustion and ventilation.. However, when the unit is -
installed in buildings of unusually air-tight con-
struction, or when the furnace is located in very
restricted spaces such as closets or utility rooms,
special provisions must be made for combustion,
ventilating, and draft hood dilution air. l
When the unit is installed in a confined. space, pro-
vide the confined space with two permanent open- |
ings, one near the top.of the enclosure and one near
the bottom. These openings must freely communicate
with interior areas that have adequate infiltration
air from the outside. Each opening must have a free
"area of not less than one square inch for each
1000 Btu/hr of rated input of all appliances located
within the enclosure. Each PCIE must have at
least 100 square inches free area. |
[3t isonet practicable to. connect the two openings.
to interior space, or if the interior space has in- |
sufficient infiltration air, then it is necessary to
connect the openings to the outside. If air openings |
are directly to outdoors, the minimum free area
should be.one square inch per 3000 Btu/hr of input
rating or.in accordance with Z21.30-1964 or latest
edition, *American Standards for Installation of Gas
Appliances and Gas Piping." Each opening must
have at least 100 square inches free area.
It 1s strongly recommended that the installer consult
the “‘American Standards Installation of Gas Ap-
_pliances and Gas Piping,’’ ASA Z21.30-1964.
9. In restricted Spaces it is very important that the
return air ducts be sealed firmly into the furnace so
that the return air will be kept separate from the.
combustion and ventilating air.
- 3940.