Carrier 58CTA/CTX Electrical Box on Furnace Casing Side. See Fig, Fire or Electrical Shock Hazard

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

Electrical Box on Furnace Casing Side. See Fig. 25.

!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.

58CT

A03221

Fig. 25 - 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 posi- tion the hole in the electrical box over the hole in the fur- nace casing.

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

4.Remove and save two screws holding J-Box. (See Fig. 24.)

5.Pull furnace power wires out of 1/2-inch (12 mm) diamet- er 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 re- moved 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. 23. Use best practices (NEC in U.S. and CSA C22.1 in Canada) for wire bush- ings, 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 (22 mm) dia- meter 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. 23.

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 (22 mm) diameter hole in J-Box.

3.Secure BX cable to J-Box bracket with connectors ap- proved 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. 23.

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. 33.) Connect terminal Y/Y2 as shown in Fig. 26-32 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.

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Contents Ama Furnace Reliability Hazard Safety ConsiderationsCUT Hazard Dimensions IntroductionClearances to Combustibles Electrostatic Discharge ESD Precautions Procedure Codes and StandardsGeneral LocationCarbon Monoxide Poisoning and Unit Damage Hazard Property Damage Hazard FIRE, Injury or Death HazardFire Hazard Location Relative to Cooling EquipmentCarbon Monoxide Poisoning Hazard AIR for Combustion VentilationFurnace Corrosion Hazard Outdoor Combustion Air MethodAir for Combustion, Ventilation, and Dilution for Outdoors Installation Upflow InstallationFIRE, EXPLOSION, and Carbon Monoxide Poisoning Hazard Downflow InstallationHorizontal Installation Suspended Furnace SupportPlatform Furnace Support Roll-Out ProtectionOpening dimensions In. mm Duct FlangesHorizontal Unit Suspension General Requirements Filter Arrangement Carbon Monoxide Poisoning HazardAIR Ducts Ductwork Acoustical Treatment Supply Air ConnectionsFurnace Air Delivery CFM With FilterSpeed External Static Pressure IN. WC Size Inlet Return Air Connections Air Delivery CFM With Filter*Downflow Furnaces GAS Piping Fire or Explosion HazardUpflow Return Air Configurations and Restrictions Maximum Capacity of Pipe Furnace Damage HazardElectrical Shock and Fire Hazard WiringElectrical Connections Electrical Shock Hazard Furnace MAY not Operate HazardBOX Relocation Electrical DataElectrical Connection to J-BOX Electrical Box on Furnace Casing Side. See Fig Power Cord Installation in Furnace J-BOXBX. Cable Installation in Furnace J-BOX Fire or Electrical Shock HazardTwo-Stage Furnace with Two-Speed Air Conditioner See notes 2, 11, and 12 on the page following these figures Accessories VentingGeneral Venting Requirements Masonry Chimney RequirementsChimney Inspection Chart Internal Area of Chimney Appliance Application RequirementsVent Height Upflow Application-Vent Elbow Up Downflow Application-Vent Elbow Up then Left Horizontal Left Application Vent Elbow Left Furnace Vent Diameter Vent Height Orientation INPUTBTUH/HRUsing Tin Snips to Cut Tie Points General START-UP, ADJUSTMENT, and Safety CheckBurn Hazard Stage Furnace Setup Switch Description Start-Up ProceduresAdjustments Fire and Explosion HazardAltitude Derate Multiplier for U.S.A Redundant Automatic Gas Control ValveOrifice Hole Furnace Overheating Hazard Gas Rate cu ft. /hrSeconds Size of Test Dial For Revolution Speed Selection Color Speed AS ShippedStage Furnace Blower OFF delay Setup Switch Check Safety ControlsChecklist Desired Heating Mode Setup Switch Blower OFF Delay SECA08485 Orifice Size and Manifold Pressures In wc for Gas Input Rate A08219 A08219A Service and Maintenance Procedures IntroductionCare and Maintenance Carbon Monoxide Poisoning and Fire HazardWiring Diagram Filter Size Information IN. / MM Cleaning AND/OR Replacing AIR FilterBlower Motor and Wheel Cleaning Heat Exchanger Unit Damage HazardSequence of Operation Igniter Position-Top View58CT Thermidistat Mode Single-Stage Thermostat and Two-Speed Cooling Adaptive ModeSingle-Speed Cooling Troubleshooting Wiring DiagramsContinuous Blower Mode Troubleshooting Guide 2-Speed KitAdapter Chimneyin Usedswitch Shutoffvent Blocked Catalog No58CT---10SI