Supply Air Connections, Downflow Furnaces | Bryant 315AAV guide

Supply Air Connections

For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for possible openings using light assistance or a probe can be inserted for sampling the air stream. The cover attachment shall prevent leaks.

Upflow and Horizontal Furnaces

Connect supply-air duct to flanges on furnace supply-air outlet. Bend flange upward to 90_ with wide duct pliers. (See Fig. 14.) The supply-air duct must be connected to ONLY the furnace supply-outlet-air duct flanges or air conditioning coil casing (when used). DO NOT cut main furnace casing side to attach supply air duct, humidifier, or other accessories. All accessories MUST be connected to duct external to furnace main casing.

NOTE: For horizontal applications, the top most flange may be bent past 90_ to allow the evaporator coil to hang on the flange temporarily while the remaining attachment and sealing of the coil are performed.

Downflow Furnaces

Connect supply-air duct to supply-air outlet on furnace. Bend flange inward past 90_ with wide duct pliers (See Fig. 14.) The supply-air duct must be connected to ONLY the furnace supply outlet or air conditioning coil casing (when used). When installed on combustible material, supply-air duct must be connected to ONLY the factory-approved accessory subbase, or a factory-approved air conditioning coil casing. DO NOT cut main furnace casing to attach supply side air duct, humidifier, or other accessories. All accessories MUST be connected to duct external to furnace casing.

315AAV

UPFLOWDOWNFLOW HORIZONTAL

90°		90°
YES	YES	YES
YES		YES

120°	YES	120°	YES	120°	YES
MIN		MIN		MIN

NO

NO

NO

A02020

Fig. 14 - Duct Flanges

14

Image 14

Bryant 315AAV instruction manual Supply Air Connections, Upflow and Horizontal Furnaces, Downflow Furnaces

Contents

Electrostatic Discharge ESD Precautions CUT Hazard Safety ConsiderationsFurnace Reliability Hazard Clearances to Combustibles Codes and Standards Electrostatic Discharge ESD Precautions ProcedureIntroduction Dimensional Drawing Dimensions In. mm Location Carbon Monoxide Poisoning / Component Damage Hazard FIRE, Injury or Death Hazard Personal Injury AND/OR Property Damage Hazard Fire HazardLocation Relative to Cooling Equipment Carbon Monoxide Poisoning Hazard AIR for Combustion VentilationFurnace Corrosion Hazard Air for Combustion, Ventilation, and Dilution for Outdoors Standard Method Combination of Indoor and Outdoor Air InstallationUpflow Installation Bottom Return Air Inlet Platform Furnace Support Downflow InstallationSuspended Furnace Support Floor and Plenum Opening Dimensions Roll-Out Protection AIR Ducts Opening Dimensions In. mmFilter Arrangement General Requirements Downflow Furnaces Supply Air ConnectionsUpflow and Horizontal Furnaces Horizontal Unit Suspension Typical Attic Installation Downflow Return Air Configurations and Restrictions Air Delivery CFM With Filter CFM Maximum Capacity of Pipe Return Air ConnectionsGAS Piping Fire or Explosion Hazard Furnace Damage Hazard Electrical Shock and Fire Hazard WiringElectrical Connections Electrical Shock Hazard Furnace MAY not Operate Hazard Fire or Electrical Shock Hazard Electrical DataBox Relocation Venting BX Cable Installation in Furnace J-BoxAccessories Field Wiring Diagram General Venting Requirements Two-Stage Furnace with Single-Speed Air Conditioner Two-Stage Furnace with Two-Speed Air Condi Tioner See notes 1 and 2 on the page following these figures 315AAV Chimney Inspection Chart Burn Hazard Masonry Chimney RequirementAppliance Application Requirements Additional Venting Requirements Vent Height Upflow Application Vent Elbow Up Horizontal Left Application Vent Elbow Left Venting Notes for Horizontal Left Application Vent Elbow Up General START-UP, ADJUSTMENT, and Safety CheckSidewall Venting Furnace Vent Orientation Furnace Input MIN. Vent Orifice Hole Fire and Explosion Hazard Furnace Setup Switch Description Setup Switch Switch Name Normal Description of USE Position Derate Factor Altitude Derate Multiplier for U.S.AAltitude Percent Derate Multiplier Unit Damage Hazard Furnace Overheating Hazard 315AAV Wiring Diagram Gas Rate CU ft./hr Seconds G Size of Test Dial Specific Gravity of Natural GAS Altitude Range BTUH/CU FT AltitudeRange Altitude Range BTUH/CU AT Altitude Electrical SHOCK, Fire or Explosion Hazard Service and Maintenance ProceduresEnvironmental Hazard Electrical Operation Hazard Electrical Controls and Wiring Component Self-Test Media cabinet filter procedures Care and Maintenance Fire or Explosion HazardCleaning and/or Replacing Air Filter Carbon Monoxide Poisoning and Fire Hazard Filter Size Information In. mm Cleaning Heat ExchangerService agency Following steps should be performed by a qualified Igniter Position Side View Sequence of Operation Cooling A/C or Continuous-Fan CF Airflow Selection Chart Inducer Prepurge Period Single-Stage Thermostat and Two-Speed Cooling Adaptive Mode Single-Speed Cooling Continuous Blower Mode Thermidistat ModeSuper-Dehumidify Mode Component test TroubleshootingHeat pump Troubleshooting Guide Adapter Kit Werblo Modelinvalid Orselection Accessory List Description Part Number Parts Replacement Information Guide