Bryant 315AAV Downflow Installation, Suspended Furnace Support, Platform Furnace Support

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5/16″

(8mm)

(8mm)

5/16″

1 3/4″ (44mm)

1 3/4″ (44mm)

(8mm) 5/16″

(8mm)

5/16″

(44mm) 1 3/4″ (44mm)1 3/4″

A89014

Fig. 10 - Leveling Legs

NOTE: Bottom closure must be used when leveling legs are used. It may be necessary to remove and reinstall bottom closure panel to install leveling legs. To remove bottom closure panel, see Item 1 in Bottom Return Air Inlet section in Step 1 above.

To install leveling legs:

1.Position furnace on its back. Locate and drill a hole in each bottom corner of furnace. (See Fig. 10.)

2.For each leg, install nut on bolt and then install bolt with nut in hole. (Install flat washer if desired.)

3.Install another nut on other side of furnace base. (Install flat washer if desired.)

4.Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement.

5.Reinstall bottom closure panel if removed.

DOWNFLOW INSTALLATION

NOTE: For downflow applications, this furnace is approved for use on combustible flooring when any one of the following 3 accessories are used:

SSpecial Base, KGASB

SCased Coil Assembly Part No. CNPV, CNRV, CAP, or

CAR

SCoil Box Part No. KCAKC

1.Determine application being installed from Table 4.

2.Construct hole in floor per Table 4 and Fig. 11.

3.Construct plenum to dimensions specified in Table 4 and Fig. 11.

4.If downflow subbase, KGASB is used, install as shown in Fig. 12. If Coil Assembly Part No. CPVP, CAPMP or CNPVP Coil Box Part No. KCAKC is used, install as shown in Fig. 13.

NOTE: It is recommended that the perforated supply-air duct flanges be completely folded over or removed from furnace when installing the furnace on a factory-supplied cased coil or coil box. To remove the supply-air duct flange, use wide duct pliers or hand seamers to bend flange back and forth until it breaks off. Be careful of sharp edges. (See Fig. 14.)

Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed in bottom return-air opening. Remove and discard this panel when bottom return air is used. To remove bottom closure panel, perform the following:

1.Tilt or raise furnace and remove 2 screws holding bottom filler panel. (See Fig. 9.)

2.Rotate bottom filler panel downward to release holding tabs.

3.Remove bottom closure panel.

4.Reinstall bottom filler panel and screws.

HORIZONTAL INSTALLATION

!WARNING

FIRE, EXPLOSION, AND CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury, death, 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.

The furnace can be installed horizontally in an attic or crawlspace on either the left-hand (LH) or right-hand (RH) side. The furnace can be hung from floor joists, rafters or trusses or installed on a non-combustible platform, blocks, bricks or pad.

Suspended Furnace Support

The furnace may be supported under each end with threaded rod, angle iron or metal plumber’s strap as shown. (See Fig. 15 and 16.) Secure angle iron to bottom of furnace as shown. Heavy-gauge sheet metal straps (plumber’s straps) may be used to suspend the furnace from each bottom corner. To prevent screws from pulling out, use 2 #8 x in. screws into the side and 2 #8 x in. screws in the bottom of the furnace casing for each strap. (See Fig. 15 and 16.)

If the screws are attached to ONLY the furnace sides and not the bottom, the straps must be vertical against the furnace sides and not pull away from the furnace sides, so that the strap attachment screws are not in tension (are loaded in shear) for reliable support.

Platform Furnace Support

Construct working platform at location where all required furnace clearances are met. (See Fig. 2 and 17.) For furnaces with 1-in. (25 mm) clearance requirement on side, set furnace on non-combustible blocks, bricks or angle iron. For crawlspace installations, if the furnace is not suspended from the floor joists, the ground underneath furnace must be level and the furnace set on blocks or bricks.

315AAV

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Contents Electrostatic Discharge ESD Precautions CUT Hazard Safety ConsiderationsFurnace Reliability Hazard Clearances to Combustibles Codes and Standards Electrostatic Discharge ESD Precautions ProcedureIntroduction Location Dimensional Drawing Dimensions In. mmFIRE, Injury or Death Hazard Carbon Monoxide Poisoning / Component Damage HazardPersonal Injury AND/OR Property Damage Hazard Fire HazardLocation Relative to Cooling Equipment Carbon Monoxide Poisoning Hazard AIR for Combustion VentilationFurnace Corrosion Hazard Standard Method Air for Combustion, Ventilation, and Dilution for OutdoorsBottom Return Air Inlet InstallationUpflow Installation Combination of Indoor and Outdoor AirPlatform Furnace Support Downflow InstallationSuspended Furnace Support Floor and Plenum Opening Dimensions Roll-Out Protection General Requirements Opening Dimensions In. mmFilter Arrangement AIR DuctsDownflow Furnaces Supply Air ConnectionsUpflow and Horizontal Furnaces Horizontal Unit Suspension Typical Attic Installation Downflow Return Air Configurations and Restrictions CFM Air Delivery CFM With FilterFurnace Damage Hazard Return Air ConnectionsGAS Piping Fire or Explosion Hazard Maximum Capacity of PipeFurnace MAY not Operate Hazard WiringElectrical Connections Electrical Shock Hazard Electrical Shock and Fire HazardFire or Electrical Shock Hazard Electrical DataBox Relocation Venting BX Cable Installation in Furnace J-BoxAccessories Field Wiring Diagram Two-Stage Furnace with Single-Speed Air Conditioner General Venting RequirementsTwo-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 Vent Height Additional Venting RequirementsUpflow Application Vent Elbow Up Horizontal Left Application Vent Elbow Left Horizontal Left Application Vent Elbow Up Venting Notes forFurnace Vent Orientation Furnace Input MIN. Vent START-UP, ADJUSTMENT, and Safety CheckSidewall Venting GeneralFire and Explosion Hazard Orifice HoleSetup Switch Switch Name Normal Description of USE Position Furnace Setup Switch DescriptionDerate Factor Altitude Derate Multiplier for U.S.AAltitude Percent Derate Multiplier Furnace Overheating Hazard Unit Damage Hazard315AAV Wiring Diagram Seconds G Size of Test Dial Gas Rate CU ft./hrSpecific Gravity of Natural GAS Altitude Range BTUH/CU FT AltitudeRange BTUH/CU Altitude RangeAT Altitude Electrical Operation Hazard Service and Maintenance ProceduresEnvironmental Hazard Electrical SHOCK, Fire or Explosion HazardComponent Self-Test Electrical Controls and WiringCarbon Monoxide Poisoning and Fire Hazard Care and Maintenance Fire or Explosion HazardCleaning and/or Replacing Air Filter Media cabinet filter proceduresFollowing steps should be performed by a qualified Cleaning Heat ExchangerService agency Filter Size Information In. mmIgniter Position Side View Sequence of Operation Inducer Prepurge Period Cooling A/C or Continuous-Fan CF Airflow Selection ChartSingle-Speed Cooling Single-Stage Thermostat and Two-Speed Cooling Adaptive ModeContinuous Blower Mode Thermidistat ModeSuper-Dehumidify Mode Component test TroubleshootingHeat pump Troubleshooting Guide Adapter Kit Werblo Modelinvalid Orselection Description Part Number Accessory ListParts Replacement Information Guide
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