Introduction - Bryant 987MB Installation, Start-Up, Operating And Service And Maintenance Instructions

987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
POSITION
Rear
Front (Combustion air openings in
furnace and in structure)
Required for service
All Sides of Supply Plenum
Sides
Vent
Top of Furnace
* Consult local building codes.
12. Maintain a 1-in. (25 mm) clearance from combustible materials to
supply air ductwork for a distance of 36 in. (914 mm) horizontally
from the furnace. See NFPA 90B or local code for further
requirements.
13. These furnaces SHALL NOT be installed directly on carpeting,
combustible tile, or any other combustible material other than wood
flooring. In downflow installations, factory accessory floor base
MUST be used when installed on combustible materials and wood
flooring. Special base is not required when this furnace is installed
on manufacturer's Coil Assembly is used. See
to combustible construction information.
!
Important Installation and Start-up Procedures
Failure to follow this procedure may result in a nuisance smoke or odor
complaint.
The manifold pressure, gas rate by meter clocking, temperature rise and
operation must be checked after installation. Minor smoke and odor
may be present temporarily after start-up from the manufacturing
process. Some occupants are more sensitive to this minor smoke and
odor. It is recommended that doors and windows be open during the
first heat cycle.

INTRODUCTION

THE BLOWER IS LOCATED
TO THE RIGHT OF THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED TO THE LEFT.
THE BLOWER IS
LOCATED ABOVE THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED DOWNWARD
Fig. 2 – Multipoise Orientations
The 4-way multipoise Category IV condensing furnace is CSA
design-certified for both direct-vent (2-pipe) and ventilated combustion
air venting installations, see Fig.
use with natural gas. The furnace can be converted in the field for use
with propane gas when a factory-supplied conversion kit is used. Refer
to the furnace rating plate for conversion kit information.
This furnace is not approved for installation in mobile homes,
recreational vehicles, or outdoors.
This furnace is designed for minimum continuous return-air temperature
of 60°F (15°C) db or intermittent operation down to 55°F (13°C) db such
as when used with a night setback thermostat. Return-air temperature
must not exceed 80°F (27°C) db. Failure to follow these return-air
temperature limits may affect reliability of heat exchangers, motors, and
controls, see Fig. 3.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Units
CLEARANCE
0 (0 mm)
1 in. (25 mm)
*24 in. (610 mm)
*1 in. (25 mm)
0 (0 mm)
0 (0 mm)
1 in. (25 mm)
Table 1 for clearance
NOTICE
THE BLOWER IS
LOCATED BELOW THE
BURNER SECTION, AND
CONDITIONED AIR IS
DISCHARGED UPWARD.
THE BLOWER IS
LOCATED TO THE LEFT
OF THE BURNER SECTION,
AND CONDITIONED AIR IS
DISCHARGED TO THE RIGHT .
2. The furnace is factory-shipped for
Fig. 3 – Freeze Protection and Return Air Temperature
The furnace should be sized to provide 100 percent of the design heating
load requirement plus any margin that occurs because of furnace model
size capacity increments. None of the furnace model sizes can be used if
the heating load is 20,000 BTU or lower. Use Air Conditioning
Contractors of America (Manual J and S); American Society of Heating,
Refrigerating, and Air-Conditioning Engineers; or other approved
engineering method to calculate heating load estimates and select the
furnace. Excessive oversizing of the furnace may cause the furnace
and/or vent to fail prematurely, customer discomfort and/or vent
freezing.
Failure to follow these guidelines is considered faulty installation and/or
misapplication of the furnace; and resulting failure, damage, or repairs
may impact warranty coverage.
For accessory installation details, refer to the applicable instruction
literature.
NOTE: Remove all shipping materials, loose parts bag, and literature
before operating the furnace, see
FIRE HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
Do not install the furnace on its back or hang furnace with control
compartment facing downward. Safety control operation will be
adversely affected. Never connect return-air ducts to the back of the
furnace, see Fig. 4.
Air Intake Pipe Flange
Coupling Flange Gaskets
Sharp Tip Screws (Vent and Inlet Flanges)
Vent Pipe Coupling
Vent Pipe Coupling Clamps
Rubber Drain Elbow
Drain Tube Clamps
A12181
1/2-in. CPVC to 3/4-in. PVC Pipe Adapter
Gas Line Grommet
Junction Box Cover
Junction Box Base
Green Ground Screw
Blunt Tip Screws (Junction Box)
Thermostat Wire Grommet
Drain Extension Tube (Z-pipe) (Provided separately in
5
Table 2.
WARNING
!
Table 2 – Loose Parts Bag
DESCRIPTION
Vent Pipe Flange
furnace)
A150573
QUANTITY
1
1
2
10
1
2
1
4
1
1
1
1
1
3
1
1