Bryant 120 Electrical Box on Furnace Casing Side. See Fig, Fire or Electrical Shock Hazard

Page 23

6.Reinstall cover to J-Box. Do not pinch wires between cover and bracket.

Electrical Box on Furnace Casing Side. See Fig. 26.

!WARNING

FIRE OR ELECTRICAL SHOCK HAZARD

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

If field-supplied manual disconnect switch is to be mounted on furnace casing side, select a location where a drill or fastener cannot damage electrical or gas components.

A03221

Fig. 26 - Field-Supplied Electrical Box on Furnace Casing

1.Select and remove a hole knockout in the casing where the electrical box is to be installed.

NOTE: Check that duct on side of furnace will not interfere with installed electrical box.

2.Remove the desired electrical box hole knockout and position the hole in the electrical box over the hole in the furnace casing.

3.Fasten the electrical box to casing by driving two fieldsupplied screws from inside electrical box into casing steel.

4.Remove and save two screws holding J-Box. (See Fig. 25.)

5.Pull furnace power wires out of 1/2-inch diameter hole in J-Box. Do not loosen wires from strain-relief wire-tie on outside of J-Box.

6.Route furnace power wires through holes in casing and electrical box and into electrical box.

7.Pull field power wires into electrical box.

8.Remove cover from furnace J-Box.

9.Route field ground wire through holes in electrical box and casing, and into furnace J-Box.

10.Reattach furnace J-Box to furnace casing with screws removed in Step 4.

11.Secure field ground wire to J-Box green ground screw.

12.Complete electrical box wiring and installation. Connect line voltage leads as shown in Fig. 24. Use best practices (NEC in U.S. and CSA C22.1 in Canada) for wire bushings, strain relief, etc.

13.Reinstall cover to J-Box. Do not pinch wires between cover and bracket.

POWER CORD INSTALLATION IN FURNACE J-BOX

NOTE: Power cords must be able to handle the electrical requirements listed in Table 7. Refer to power cord manufacturer’s listings.

1.Remove cover from J-Box.

2.Route listed power cord through 7/8-inch diameter hole in J-Box.

3.Secure power cord to J-Box bracket with a strain relief bushing or a connector approved for the type of cord used.

4.Secure field ground wire to green ground screw on J-Box bracket.

5.Connect line voltage leads as shown in Fig. 24.

6.Reinstall cover to J-Box. Do not pinch wires between cover and bracket.

BX. CABLE INSTALLATION IN FURNACE J-BOX

1.Remove cover from J-Box.

2.Route BX cable into 7/8-inch diameter hole in J-Box.

3.Secure BX cable to J-Box bracket with connectors approved for the type of cable used.

4.Secure field ground wire to green ground screw on J-Box bracket.

5.Connect line voltage leads as shown in Fig. 24.

6.Reinstall cover to J-Box. Do not pinch wires between cover and bracket.

24-V WIRING

Make field 24-v connections at the 24-v terminal strip. (See Fig. 34.) Connect terminal Y/Y2 as shown in Fig. 27-33 for proper cooling operation. Use only AWG No. 18, color-coded, copper thermostat wire.

The 24-v circuit contains an automotive-type, 3-amp. fuse located on the control. Any direct shorts during installation, service, or maintenance could cause this fuse to blow. If fuse replacement is required, use ONLY a 3-amp. fuse of identical size.

312A

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Contents Ama CUT Hazard Safety ConsiderationsFurnace Reliability Hazard Size DimensionsIntroduction Width Bottom Flue CabinetInstallation Codes and Standards Electrostatic Discharge ESD Precautions ProcedureCarbon Monoxide Poisoning and Unit Damage Hazard LocationGeneral Location Relative to Cooling Equipment FIRE, Injury or Death HazardFire Hazard Property Damage HazardOutdoor Combustion Air Method AIR for Combustion VentilationFurnace Corrosion Hazard Carbon Monoxide Poisoning HazardAir for Combustion, Ventilation and Dilution for Outdoors Upflow Installation InstallationSuspended Furnace Support Downflow InstallationHorizontal Installation FIRE, EXPLOSION, and Carbon Monoxide Poisoning HazardRoll-Out Protection Floor and Plenum Opening DimensionsWidth Opening dimensionsFurnace Plenum Opening Floor Opening Casing Horizontal Unit Suspension Ductwork Acoustical Treatment Supply Air Connections Filter Arrangement Carbon Monoxide Poisoning HazardAIR Ducts General RequirementsSpeed External Static Pressure IN. WC Size Inlet Air Delivery CFM With Filter2380 2285 2200 2085 1970 1835 GAS Piping Fire or Explosion Hazard Air Delivery CFM With Filter*Downflow Furnaces Return Air ConnectionsUpflow Return Air Configurations and Restrictions Furnace Damage Hazard Maximum Capacity of PipeFurnace MAY not Operate Hazard WiringElectrical Connections Electrical Shock and Fire Hazard Electrical Shock HazardElectrical Connection to J-BOX Electrical DataBOX Relocation Fire or Electrical Shock Hazard Power Cord Installation in Furnace J-BOXBX. Cable Installation in Furnace J-BOX Electrical Box on Furnace Casing Side. See FigTwo-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 KnockoutFire and Explosion Hazard START-UP, ADJUSTMENT, and Safety CheckStart-Up Procedures GeneralAltitude Derate Multiplier for U.S.A AdjustmentsStage Furnace Setup Switch Description U.SRedundant Automatic Gas Control Valve Seconds Size of Test Dial For Revolution Gas Rate cu ft/hrFurnace Overheating Hazard Color Speed AS Shipped Speed SelectionDesired Heating Mode Setup Switch Blower OFF Delay SEC Check Safety ControlsStage Furnace Blower OFF delay Setup Switch Checklist Gravity Altitude RangeSpecific Gravity of Natural GAS BTUH/CU6001 to Specific Gravity of Natural GAS Altitude Range Heat Value Specific Gravity of Natural GAS Altitude RangeBTUH/CU FT Specific Gravity of Natural GAS Heat Value AT Altitude Service and Maintenance ProceduresElectrical SHOCK, Fire or Explosion Hazard FIRE, Personal Injury and Unit DamageUnit Operation Hazard Care and MaintenanceElectrical Controls and Wiring Electrical Shock Hazard IntroductionService Wiring Diagram Furnace Filter Size Casing Cleaning AND/OR Replacing AIR FilterFilter size information Blower Motor and Wheel Electrical Shock HazardUnit Damage Hazard Cleaning Heat ExchangerIgniter Position Top View Sequence of OperationTwo-Stage Heating Adaptive mode with Single-Stage Thermostat Single-Speed Cooling Single-Stage Thermostat and Two-Speed Cooling Adaptive ModeThermidistat Mode Continuous Blower Mode Wiring DiagramsTroubleshooting Troubleshooting Guide 2-Speed Blocked vent shutoff switch used in Chimney Adapter Kit Page Catalog No. II312A---45---8
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