Clearances To Combustibles; Upflow; Downflow - Bryant 355MAV Installation, Start-Up, And Operating Instructions Manual

This forced air furnace is equipped for use with natural gas at altitudes 0 - 10,000 ft (0 - 3,050m), except 140 size furnaces are only approved for altitudes 0 - 7,000 ft.
(0 - 2,135m).
An accessory kit, supplied by the manufacturer, shall be used to convert to propane gas use or may be required for some natural gas applications.
This furnace is for indoor installation in a building constructed on site. This furnace may be installed in a manufactured (mobile) home when stated on rating plate and
using factory authorized kit.
This furnace may be installed on combustible flooring in alcove or closet at Minimum Inches Clearance To Combustible Construction as described below.
This furnace requires a special venting system. Refer to the installation instructions for parts list and method of installation. This furnace is for use with schedule-40 PVC,
PVC-DWV , CPVC, or ABS-DWV pipe, and must not be vented in common with other gas-fired appliances. Construction through which vent/air intake pipes may be
installed is maximum 24 inches (600 mm), minimum 3/4 inches (19 mm) thickness (including roofing materials).
For upflow and downflow applications, furnace must be installed level, or pitched within 1/2" of level. For a
horizontal application, the furnace must be pitched minimum 1/4" to maximum of 1/2" forward for proper
drainage. See Installation Manual for IMPORT ANT unit support details on horizontal applications.
MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION
ALL POSITIONS:
Mimimum front clearance for service 30 inches (762mm).
*
DOWNFLOW POSITIONS:
†
For installation on combustible floors only when installed on special base No.
KGASB0201ALL, Coil Assembly, Part No. CD5 or CK5, or Coil Casing, Part No. KCAKC.
HORIZONTAL POSITIONS:
Line contact is permissible only between lines formed by intersections of top and two sides
of furnace jacket, and building joists, studs, or framing.
§
Clearance shown is for air inlet and air outlet ends.
Ø 120 size furnace requires 1 inch bottom clearance to combustible materials.
Fig. 4—Return-Air Temperature
These furnaces are shipped with the following materials to assist in
proper furnace installation. These materials are shipped in the main
blower compartment.
Installer Packet includes:
Installation, Start-Up, and Operating Instructions
Service and Maintenance Procedures
INSTALLATION
328068-201 REV. A
LIT - TOP
Fig. 3—Clearances to Combustibles
A93042
Loose Parts Bag includes:
—4—
LEVEL (0") TO
1/2" MAX
FRONT
UPFLOW OR

DOWNFLOW

This furnace is approved for UPFLOW, DOWNFLOW and
HORIZONTAL installations.
1"
Clearance arrows
do not change with
furnace orientation.
0"
B
A
C
K
0"
§
0"
Ø
†
Clearance in inches.
18-IN. MINIMUM
Fig. 5—Installation in a Garage
User's Information Manual
Warranty Certificate
Pressure tube extension
Collector box or condensate trap extension tube
Inducer housing drain tube
1/2-in. CPVC street elbow
Drain tube coupling
Drain tube coupling grommet
Vent and combustion-air pipe support
MIN 1/4" TO 1/2" MAX
FRONT
HORIZONTAL
§
0"
S
E
R V
I
C
*
E
F R
30
O
N
T
MIN
3"
Vent clearance to
combustibles 0".
A02250
TO BURNERS
A93044
Quantity
1
1
1
2
1
1
2