Manuals / Bryant / Household Appliance / Furnace

Bryant 120 instruction manual Catalog No. II312A---45---8, Edition Date 02/07, Replaces: II312A

Models: 120

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E2007 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231	Printed in U.S.A.	Edition Date: 02/07	Catalog No. II312A---45---8

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.			Replaces: II312A--- 45--- 7

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Bryant 120 instruction manual Catalog No. II312A---45---8, Edition Date 02/07, Replaces: II312A

Contents

312A Installation, Start-up,Operating andService and Maintenance Instructions Series 120/C 2---StageDeluxe Induced---Combustion312A SAFETY CONSIDERATIONSFig. 1 - Dimensional Drawing FURNACE RELIABILITY HAZARDINTRODUCTION Table 1 - Dimensions In312A 312A Fig. 2 - Clearances to CombustiblesINSTALLATION DÉGAGEMENT MINIMUM EN POUCES AVEC ÉLÉMENTSStep 2 - General Installation ELECTROSTATIC DISCHARGE ESD PRECAUTIONS PROCEDUREStep 1 - Safety Step 6 - Gas Piping and Gas Pipe Pressure TestingGENERAL LOCATIONFig. 4 - Multipoise Orientations CARBON MONOXIDE POISONING AND UNIT DAMAGE HAZARDFIRE, INJURY OR DEATH HAZARD Fig. 5 - Installation in a GarageFig. 6 - Prohibit Installation on Back FIRE HAZARDCARBON MONOXIDE POISONING HAZARD AIR FOR COMBUSTION AND VENTILATIONFURNACE CORROSION HAZARD Outdoor Combustion Air Method312A OutdoorsIndoors CARBON MONOXIDE POISONING HAZARDVolume INSTALLATIONVolume 21ft3Fig. 9 - Removing Bottom Closure Panel Fig. 10 - Leveling Legs DOWNFLOW INSTALLATIONHORIZONTAL INSTALLATION Leveling Legs If DesiredRoll-OutProtection Fig. 11 - Floor and Plenum Opening DimensionsInstalled on a Combustible Floor Combustible FloorUPFLOW DOWNFLOW HORIZONTAL Table 4 - Opening dimensions InFig. 14 - Duct Flanges 312AFig. 16 - Horizontal Suspension with Straps Fig. 15 - Horizontal Unit Suspension312A AIR DUCTS General Requirements Fig. 17 - Typical Attic InstallationFILTER ARRANGEMENT Ductwork Acoustical TreatmentTable 5 - Air Delivery - CFM With Filter 312A312A HighReturn Air Connections Table 5 - Air Delivery - CFM With Filter* ContDownflow Furnaces GAS PIPING312A A02075 A02163 A02162Fig. 21 - Right Side Gas Entry Example Table 6 - Maximum Capacity of PipeFURNACE DAMAGE HAZARD Fig. 22 - Right Side Gas Entry ExampleELECTRICAL CONNECTIONS Fig. 24 - Field Wiring Diagram115-VWIRING ELECTRICAL SHOCK AND FIRE HAZARDJ-BOXRELOCATION ELECTRICAL CONNECTION TO J-BOXTable 7 - Electrical Data Fig. 25 - Relocating J-Box24-VWIRING POWER CORD INSTALLATION IN FURNACE J-BOXBX. CABLE INSTALLATION IN FURNACE J-BOX Electrical Box on Furnace Casing Side. See FigDual Fuel Fig. 27 - Two-StageFurnace with Two-SpeedAirConditioner and Single-SpeedHeat Pumpand Two-SpeedAir Conditioner and Two-SpeedHeat Pump312A Fig. 34 - Furnace Control-PSCBlower Motor ACCESSORIESVENTING HI HEAT312A GENERAL VENTING REQUIREMENTSMASONRY CHIMNEY REQUIREMENTS CARBON MONOXIDE POISONING HAZARDCHIMNEY INSPECTION CHART Fig. 35 - Chimney Inspection Chart312A Exterior Masonry Chimney FAN + NAT Installations with Type-B Double-WallVentConnectors ENFPA & AGA Thousands of BTUH per HourFig. 37 - Upflow Application-VentElbow Right Fig. 36 - Upflow Application-VentElbow Up312A then Up Fig. 39 - Downflow Application-VentElbow Up312A 312A then Up312A Fig. 49 - Using Tin Snips to Cut Tie PointsCUT HAZARD Fig. 53 - Remove Knockout with Hammer Fig. 50 - Rounded End of KnockoutFig. 51 - Knockout Pulled Loose BURN HAZARDStep 1 - General START-UP,ADJUSTMENT, AND SAFETY CHECKStep 2 - Start-UpProcedures FIRE AND EXPLOSION HAZARDTable 11 - Altitude Derate Multiplier for U.S.A Step 3 - AdjustmentsIn the U.S 312AFig. 55 - Orifice Hole Fig. 54 - Redundant Automatic Gas Control ValveELECTRICAL SHOCK HAZARD FURNACE OVERHEATING HAZARD Table 12 - Gas Rate cu ft/hr312A ELECTRICAL SHOCK HAZARD Table 13 - Speed Selection312A FIRE HAZARDFig. 56 - Amp. Draw Check with Ammeter Step 4 - Check Safety Controls312A Step 5 - Checklist 312ALevel 312A312A Levellevel 312ASea level SERVICE AND MAINTENANCEPROCEDURES ELECTRICAL SHOCK, FIRE OR EXPLOSIONStep 1 - Introduction Step 2 - Care and MaintenanceELECTRICAL CONTROLS AND WIRING UNIT OPERATION HAZARD312A Fig. 57 - Service LabelSERVICE CUT HAZARD312A Fig. 58 - Wiring DiagramA07125 BLOWER MOTOR AND WHEEL CLEANING AND/OR REPLACING AIR FILTERTable 17 - Filter size information in 312AUNIT DAMAGE HAZARD CLEANING HEAT EXCHANGER9/32˝ 5/16˝ Fig. 59 - Igniter Position-SideViewStep 3 - Sequence of Operation Fig. 61 - Cleaning Heat Exchanger Cell1-7/8” Fig. 60 - Igniter Position - Top View312A See Fig. 24 or 33 for thermostat connections4.Thermidistat Mode a.Single-SpeedCooling312A 5.Continuous Blower Mode Step 4 - Wiring DiagramsStep 5 - Troubleshooting 312A312A Fig. 62 - Troubleshooting Guide 2-SpeedTROUBLESHOOTING GUIDE A02107A312A Fig. 63 - Troubleshooting Guide 2-SpeedA05001 Page Edition Date 02/07 Catalog No. II312A---45---8Replaces: II312A---

Printed in U.S.A.

Edition Date: 02/07

Catalog No. II312A---45---8

Replaces: II312A--- 45--- 7