Bryant Model 378 - Manual (Page 4)

VENTING
INDOOR INSTALLATION
Consult local codes. Unless the local codes direct
otherwise, the unit may be vented to a permanent
chimney, or to a listed Type B or Type C gas vent.
The Model 378 furnace is approved for indoor instal­
lation only when used with draft hood, Bryant Part
No. 36154C8.
To install indoor draft hood:
a. Remove upper front access panel to gain en­
trance to flue collector.
b. Insert draft hood inside furnace casing collar
and push it down over the flue collector collar to
form snug connection.
c. Fasten draft hood to flue collector collar with
sheet metal screws.
The following recommendations are made:
1. Select flue connection material that is satis­
factory for the installation and that meets the
requirements of the local codes.
2. The flue connection pipe must be the same size
as the outlet collar on the furnace. No reduction in
this size is permissible in the pipe run.
3. Run pipe as directly as possible with a minimum
number of turns.
4. Maintain a minimum of 1/4 inch per linear foot
upward slope on all horizontal runs.
5. Rigidly support the flue pipe with hangers and
straps to insure that there will be no movement after
installation.
6. Extend the flue connection pipe through the
chimney wall, flush with the inner face of the chim­
ney liner. Never connect into a chimney serving an
open fireplace unless the fireplace opening is
sealed off.
7. The chimney or gas vent should extend high
enough above the roof or neighboring obstruction
so that wind from any direction will not create a
positive pressure in the vicinity of the outlet of the
chimney or gas vent. The installer is referred to
Part V of American Standard “Installation of Gas
Appliances and Gas Piping”, ASA Z21.30, 1959 for
detailed information on chimney and gas vent use.
In general, the chimney or gas vent should extend
3 feet higher than the point of emergence through
the roof, and at least 2 feet higher than any object
within a radius of 15 feet.
8. If more than oiie appliance is vented into the
same chimney, the cross-sectional area of the chim­
ney must be as large as the largest flue pipe being
connected, plus 50 per cent of the cross-sectional
areas of the additional flue pipes being connected.
9. If more than one appliance is manifolded into the
same flue connecting pipe, the cross-sectional area
of this manifold pipe must be as large as the sum of
the cross-sectional areas of the pipes connecting
into it.
10. Flue pipe must be at least 6 inches from any
combustible materials.
Do not use dampers or other adjustable restrictions
in flue.
Any part of the vent which is outdoors must be ade­
quately insulated to assure proper chimney action
and prevent condensation.
OUTDOOR INSTALLATION
The Model 378 all-weather unit is shipped with out­
door vent as standard equipment and must be instal­
led in accordance with the following instructions
and
without alterations.
Installing Outdoor Vent
1. Remove upper front access panel to gain en­
trance to flue collector.
2. Insert cap and pipe assembly through furnace
casing.
Important: Be sure the outer wall of the double
walled pipe extends over the furnace casing con­
nector collar to assure weather tight connection and
that the inner wall connects to the flue collector
collar.
3. Fasten the flue pipe assembly to the flue col­
lector collar with sheet metal screws. Note: Addi­
tional venting is not required on outdoor units.
ELECTRIC CONNECTIONS
1. All electrical connections are to be made in
accordance with National Electrical Codes and
local codes governing such wiring.
Field connections are to be made in accordance
with wiring label attached to unit. See Figures 1 and
2 .
2. Weather tight connections must be made at elec­
trical entrance to the unit on all outdoor installa­
tions.
EH 378 4 -