Bryant 120 Opening dimensions, Furnace Plenum Opening Floor Opening Casing, Width

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Table 4 – Opening dimensions (In.)

FURNACE		PLENUM OPENING		FLOOR OPENING
CASING	APPLICATION
WIDTH		A	B	C	D

	Upflow Applications on Combustible or Noncombustible	12--- 11/16	21--- 5/8	13--- 5/16	22--- 1/4
	Flooring (KGASB subbase not required)	12--- 11/16	21--- 5/8	13--- 5/16	22--- 1/4
	Flooring (KGASB subbase not required)

	Downflow Applications on Noncombustible Flooring (KGASB	12--- 9/16	19	13--- 3/16	19--- 5/8
	subbase not required)	12--- 9/16	19	13--- 3/16	19--- 5/8
	subbase not required)
14–3/16
14–3/16	Downflow applications on combustible flooring	11--- 13/16	19	13--- 7/16	20--- 5/8
	(KGASB subbase required)	11--- 13/16	19	13--- 7/16	20--- 5/8
	(KGASB subbase required)

	Downflow Applications on Combustible Flooring with CD5 or
	CK5 Coil Assembly or KCAKC coil box	12--- 5/16	19	13--- 5/16	20
	(KGASB subbase not required)
	Upflow Applications on Combustible or Noncombustible	16	21--- 5/8	16--- 5/8	22--- 1/4
	Flooring (KGASB subbase not required)	16	21--- 5/8	16--- 5/8	22--- 1/4
	Flooring (KGASB subbase not required)
	Downflow Applications on Noncombustible Flooring	15--- 7/8	19	16--- 1/2	19--- 5/8
	(KGASB subbase not required)	15--- 7/8	19	16--- 1/2	19--- 5/8
	(KGASB subbase not required)
17–1/2	Downflow applications on combustible flooring	15--- 1/8	19	16--- 3/4	20--- 5/8
	(KGASB subbase required)	15--- 1/8	19	16--- 3/4	20--- 5/8
	(KGASB subbase required)
	Downflow Applications on Combustible Flooring with CD5 or
	CK5 Coil Assembly or KCAKC coil box	15--- 1/2	19	16--- 1/2	20
	(KGASB subbase not required)

	Upflow Applications on Combustible or Noncombustible	19--- 1/2	21--- 5/8	20--- 1/8	22--- 1/4
	Flooring (KGASB subbase not required)	19--- 1/2	21--- 5/8	20--- 1/8	22--- 1/4
	Flooring (KGASB subbase not required)

	Downflow Applications on Noncombustible Flooring	19--- 3/8	19	20	19--- 5/8
	(KGASB subbase not required)	19--- 3/8	19	20	19--- 5/8
	(KGASB subbase not required)
21
21	Downflow applications on combustible flooring	18--- 5/8	19	20--- 1/4	20--- 5/8
	(KGASB subbase required)	18--- 5/8	19	20--- 1/4	20--- 5/8
	(KGASB subbase required)
	Downflow Applications on Combustible Flooring with CD5 or
	CK5 Coil Assembly or KCAKC coil box	19	19	20	20
	(KGASB subbase not required)

	Upflow Applications on Combustible or Noncombustible	23	21--- 1/8	23--- 5/8	22--- 1/4
	Flooring (KGASB subbase not required)	23	21--- 1/8	23--- 5/8	22--- 1/4
	Flooring (KGASB subbase not required)

	Downflow Applications on Noncombustible Flooring	22--- 7/8	19	23--- 1/2	19--- 5/8
	(KGASB subbase not required)	22--- 7/8	19	23--- 1/2	19--- 5/8
	(KGASB subbase not required)
24--- 1/2
24--- 1/2	Downflow applications on Combustible flooring	22--- 1/8	19	23--- 3/4	20--- 5/8
	(KGASB subbase required)	22--- 1/8	19	23--- 3/4	20--- 5/8
	(KGASB subbase required)
	Downflow Applications on Combustible Flooring with CD5 or
	CK5 Coil Assembly or KCAKC coil box	22--- 1/2	19	23--- 1/2	20
	(KGASB subbase not required)

312A

UPFLOW DOWNFLOW HORIZONTAL

90û		90û
YES	YES	YES
YES		YES

120û	YES	120û	YES	120û	YES
MIN		MIN		MIN

NOT	NOT	NOT
RECOMMENDED	RECOMMENDED	RECOMMENDED

A02329

Fig. 14 - Duct Flanges

13

Image 13

Contents Ama Furnace Reliability Hazard Safety ConsiderationsCUT Hazard Introduction DimensionsWidth Bottom Flue Cabinet SizeInstallation Codes and Standards Electrostatic Discharge ESD Precautions ProcedureGeneral LocationCarbon Monoxide Poisoning and Unit Damage Hazard Fire Hazard FIRE, Injury or Death HazardProperty Damage Hazard Location Relative to Cooling EquipmentFurnace Corrosion Hazard AIR for Combustion VentilationCarbon Monoxide Poisoning Hazard Outdoor Combustion Air MethodAir for Combustion, Ventilation and Dilution for Outdoors Upflow Installation InstallationHorizontal Installation Downflow InstallationFIRE, EXPLOSION, and Carbon Monoxide Poisoning Hazard Suspended Furnace SupportRoll-Out Protection Floor and Plenum Opening DimensionsFurnace Plenum Opening Floor Opening Casing Opening dimensionsWidth Horizontal Unit Suspension AIR Ducts Filter Arrangement Carbon Monoxide Poisoning HazardGeneral Requirements Ductwork Acoustical Treatment Supply Air ConnectionsSpeed External Static Pressure IN. WC Size Inlet Air Delivery CFM With Filter2380 2285 2200 2085 1970 1835 Downflow Furnaces Air Delivery CFM With Filter*Return Air Connections GAS Piping Fire or Explosion HazardUpflow Return Air Configurations and Restrictions Furnace Damage Hazard Maximum Capacity of PipeElectrical Connections Electrical Shock and Fire Hazard WiringElectrical Shock Hazard Furnace MAY not Operate HazardBOX Relocation Electrical DataElectrical Connection to J-BOX BX. Cable Installation in Furnace J-BOX Power Cord Installation in Furnace J-BOXElectrical Box on Furnace Casing Side. See Fig Fire or Electrical Shock HazardTwo-Stage Furnace with Two-Speed Air Conditioner See notes 2, 11, and 12 on the page following these figures Venting AccessoriesMasonry Chimney Requirements General Venting RequirementsChimney Inspection Chart Vent Height Internal Area of Chimney Appliance Application RequirementsUpflow Application-Vent Elbow Up Downflow Application-Vent Elbow Up Horizontal Right Application Vent Elbow Right Orientation Tion PUTBTUH/HR Diameter Height FT Furnace Vent OrientaBurn Hazard Rounded End of KnockoutStart-Up Procedures START-UP, ADJUSTMENT, and Safety CheckGeneral Fire and Explosion HazardStage Furnace Setup Switch Description AdjustmentsU.S Altitude Derate Multiplier for U.S.ARedundant Automatic Gas Control Valve Furnace Overheating Hazard Gas Rate cu ft/hrSeconds Size of Test Dial For Revolution Color Speed AS Shipped Speed SelectionStage Furnace Blower OFF delay Setup Switch Check Safety ControlsDesired Heating Mode Setup Switch Blower OFF Delay SEC Checklist Specific Gravity of Natural GAS Altitude RangeBTUH/CU Gravity6001 to BTUH/CU FT Specific Gravity of Natural GAS Altitude RangeSpecific Gravity of Natural GAS Altitude Range Heat Value Electrical SHOCK, Fire or Explosion Hazard Service and Maintenance ProceduresFIRE, Personal Injury and Unit Damage Specific Gravity of Natural GAS Heat Value AT AltitudeElectrical Controls and Wiring Electrical Shock Hazard Care and MaintenanceIntroduction Unit Operation HazardService Wiring Diagram Filter size information Cleaning AND/OR Replacing AIR FilterBlower Motor and Wheel Electrical Shock Hazard Furnace Filter Size CasingUnit Damage Hazard Cleaning Heat ExchangerIgniter Position Top View Sequence of OperationTwo-Stage Heating Adaptive mode with Single-Stage Thermostat Thermidistat Mode Single-Stage Thermostat and Two-Speed Cooling Adaptive ModeSingle-Speed Cooling Troubleshooting Wiring DiagramsContinuous Blower Mode Troubleshooting Guide 2-Speed Blocked vent shutoff switch used in Chimney Adapter Kit Page Catalog No. II312A---45---8