Bryant 315AAV instruction manual Combination of Indoor and Outdoor Air, Upflow Installation

Page 10

315AAV

Infiltration rates greater than 0.60 ACH shall not be used. The minimum required volume of the space varies with the number of ACH and shall be determined per Table 3 or Equations 1 and 2. Determine the minimum required volume for each appliance in the space and add the volumes together to get the total minimum required volume for the space.

Table 3 - Minimum Space Volumes were determined by using the following equations from the National Fuel Gas Code ANSI

Z223.1-2009/NFPA 54-2009, 9.3.2.2:

1.For other than fan-assisted appliances, such as a draft hood-equipped water heater:

Volume

=

21ft3

I other

ACH

1000 Btu/hr

Other

 

A04002

2. For fan-assisted appliances such as this furnace:

Volume

=

15ft3

I fan

ACH

1000 Btu/hr

Fan

 

A04003

If: Iother = combined input of all other than fan-assisted appliances in Btuh/hr

Ifan = combined input of all fan-assisted appliances in Btuh/hr ACH = air changes per hour (ACH shall not exceed 0.60.)

The following requirements apply to the Standard Method and to the Known Air Infiltration Rate Method.

1.Adjoining rooms can be considered part of a space if:

a.There are no closeable doors between rooms.

b.Combining spaces on same floor level. Each opening shall have free area of at least 1 in.2/1,000 Btuh (2,000 mm2/kW) of the total input rating of all gas appliances in the space, but not less than 100 in.2 (0.06 m2). One opening shall commence within 12 in. (300 mm) of the ceiling and the second opening shall commence within 12 in. (300 mm) of the floor. The minimum dimension of air openings shall be at least 3 in. (80 mm). (See Fig. 8.)

c.Combining space on different floor levels. The volumes of spaces on different floor levels shall be considered as communicating spaces if connected by

one or more permanent openings in doors or floors having free area of at least 2 in.2/1,000 Btuh (4,400 mm2/kW) of total input rating of all gas appliances.

2.An attic or crawlspace may be considered a space that freely communicates with the outdoors provided there are

adequate permanent ventilation openings directly to out- doors having free area of at least 1-in.2/4,000 Btuh of total input rating for all gas appliances in the space.

3.In spaces that use the Indoor Combustion Air Method, infiltration should be adequate to provide air for combus- tion, permanent ventilation and dilution of flue gases. However, in buildings with unusually tight construction, additional air MUST be provided using the methods de- scribed in the Outdoor Combustion Air Method section.

4.Unusually tight construction is defined as Construction with:

a.Walls and ceilings exposed to the outdoors have a con- tinuous, sealed vapor barrier. Openings are gasketed or sealed and

b.Doors and openable windows are weatherstripped and

c.Other openings are caulked or sealed. These include joints around window and door frames, between sole

plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines, etc.

Combination of Indoor and Outdoor Air

1.Indoor openings shall comply with the Indoor Combus- tion Air Method below and,

2.Outdoor openings shall be located as required in the Out- door Combustion Air Method mentioned previously and,

3.Outdoor openings shall be sized as follows:

a.Calculate the Ratio of all Indoor Space volume divided by required volume for Indoor Combustion Air Method below.

b.Outdoor opening size reduction Factor is 1 minus the Ratio in a. above.

c.Minimum size of Outdoor openings shall be the size required in Outdoor Combustion Air Method above multiplied by reduction Factor in b. above. The min- imum dimension of air openings shall be not less than 3 in. (80 mm).

INSTALLATION

UPFLOW INSTALLATION

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.

Side Return Air Inlet

These furnaces are shipped with bottom closure panel installed in bottom return-air opening. This panel MUST be in place when only side return air is used.

Bottom

Closure Panel

Bottom Filler Panel

A10273

Fig. 9 - Removing Bottom Closure Panel

NOTE: Side return-air openings can be used in UPFLOW and most HORIZONTAL configurations. Do not use side return-air openings in DOWNFLOW configuration.

Leveling Legs (If Desired)

In upflow position with side return inlet(s), leveling legs may be used. (See Fig. 10.) Install field-supplied, 5/16 X 1-1/2 in. (8 X

38mm) (max) corrosion-resistant machine bolts, washers and nuts.

10

Page 9 Page 11
Image 10
Page 9 Page 11
Contents Electrostatic Discharge ESD Precautions Furnace Reliability Hazard Safety ConsiderationsCUT Hazard Clearances to Combustibles Introduction Electrostatic Discharge ESD Precautions ProcedureCodes and Standards Dimensional Drawing Dimensions In. mm LocationCarbon Monoxide Poisoning / Component Damage Hazard FIRE, Injury or Death HazardLocation Relative to Cooling Equipment Fire HazardPersonal Injury AND/OR Property Damage Hazard Furnace Corrosion Hazard AIR for Combustion VentilationCarbon Monoxide Poisoning Hazard Air for Combustion, Ventilation, and Dilution for Outdoors Standard MethodCombination of Indoor and Outdoor Air InstallationUpflow Installation Bottom Return Air InletSuspended Furnace Support Downflow InstallationPlatform Furnace Support Floor and Plenum Opening Dimensions Roll-Out Protection AIR Ducts Opening Dimensions In. mmFilter Arrangement General RequirementsUpflow and Horizontal Furnaces Supply Air ConnectionsDownflow Furnaces Horizontal Unit Suspension Typical Attic Installation Downflow Return Air Configurations and Restrictions Air Delivery CFM With Filter CFMMaximum Capacity of Pipe Return Air ConnectionsGAS Piping Fire or Explosion Hazard Furnace Damage HazardElectrical Shock and Fire Hazard WiringElectrical Connections Electrical Shock Hazard Furnace MAY not Operate HazardBox Relocation Electrical DataFire or Electrical Shock Hazard Accessories BX Cable Installation in Furnace J-BoxVenting Field Wiring Diagram General Venting Requirements Two-Stage Furnace with Single-Speed Air ConditionerTwo-Stage Furnace with Two-Speed Air Condi Tioner See notes 1 and 2 on the page following these figures 315AAV Chimney Inspection Chart Appliance Application Requirements Masonry Chimney RequirementBurn Hazard Additional Venting Requirements Vent HeightUpflow Application Vent Elbow Up Horizontal Left Application Vent Elbow Left Venting Notes for Horizontal Left Application Vent Elbow UpGeneral START-UP, ADJUSTMENT, and Safety CheckSidewall Venting Furnace Vent Orientation Furnace Input MIN. VentOrifice Hole Fire and Explosion HazardFurnace Setup Switch Description Setup Switch Switch Name Normal Description of USE PositionAltitude Percent Derate Multiplier Altitude Derate Multiplier for U.S.ADerate Factor Unit Damage Hazard Furnace Overheating Hazard315AAV Wiring Diagram Gas Rate CU ft./hr Seconds G Size of Test DialSpecific Gravity of Natural GAS Altitude Range Range AltitudeBTUH/CU FT Altitude Range BTUH/CUAT Altitude Electrical SHOCK, Fire or Explosion Hazard Service and Maintenance ProceduresEnvironmental Hazard Electrical Operation HazardElectrical Controls and Wiring Component Self-TestMedia cabinet filter procedures Care and Maintenance Fire or Explosion HazardCleaning and/or Replacing Air Filter Carbon Monoxide Poisoning and Fire HazardFilter Size Information In. mm Cleaning Heat ExchangerService agency Following steps should be performed by a qualifiedIgniter Position Side View Sequence of Operation Cooling A/C or Continuous-Fan CF Airflow Selection Chart Inducer Prepurge PeriodSingle-Stage Thermostat and Two-Speed Cooling Adaptive Mode Single-Speed CoolingSuper-Dehumidify Mode Thermidistat ModeContinuous Blower Mode Heat pump TroubleshootingComponent test Troubleshooting Guide Adapter Kit Werblo Modelinvalid Orselection Accessory List Description Part NumberParts Replacement Information Guide
Top Page Image Contents