Carrier 58CTA/CTX instruction manual Sequence of Operation, Igniter Position-Top View

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58CT

9.Using field-provided 25-caliber rifle cleaning brush, 36-in. (914 mm) long 1/4-in. (6 mm) diameter steel spring cable, a variable speed, reversible electric drill, and vacuum cleaner, clean cells as follows:

a.Remove metal screw fitting from wire brush to allow in- sertion into cable.

b.Insert the twisted wire end of brush into end of spring cable, and crimp tight with crimping tool or crimp by striking with ball-peen hammer. TIGHTNESS IS VERY IMPORTANT.

NOTE: The materials needed in item 9 can usually be purchased at local hardware stores.

(1.) Attach variable-speed, reversible drill to the end of spring cable (end opposite brush).

(2.) Insert brush end of cable into the outlet opening of cell and slowly rotate with drill. DO NOT force cable. Gradually insert cable into upper pass of cell. (See Fig. 60.)

(3.) Work cable in and out of cell 3 or 4 times to obtain sufficient cleaning. DO NOT pull cable with great force. Reverse drill and gradually work cable out.

(4.) Insert brush end of cable in burner inlet opening of cell, and proceed to clean 2 lower passes of cell in same manner as upper pass.

(5.) Repeat foregoing procedures until each cell in fur- nace has been cleaned.

(6.) Using vacuum cleaner, remove residue from each cell.

(7.) Using vacuum cleaner with soft brush attachment, clean burner assembly.

(8.) Clean flame sensor with fine steel wool.

(9.) Install NOx baffles (if removed.)

(10.) Reinstall burner assembly. Center burners in cell openings.

10.Remove old sealant from cell panel and collector box flange.

11.Spray releasing agent on the heat exchanger cell panel where collector box assembly contacts cell panel.

NOTE: A releasing agent such as cooking spray or equivalent (must not contain corn or canola oil, aromatic or halogenated hydrocarbons or inadequate seal may occur) and RTV sealant (G.E. 162, 6702, or Dow-Corning 738) are needed before starting installation. DO NOT substitute any other type of RTV sealant. G.E. 162 (P771-9003) is available through RCD in 3-oz. tubes.

12.Apply new sealant to flange of collector box and attach to cell panel using existing screws, making sure all screws are secure.

13.Reconnect wires to the following components (Use con- nection diagram on wiring label, if wires were not marked for reconnection locations.):

a.Draft safeguard switch.

b.Inducer motor.

c.Pressure switches.

d.Limit overtemperature switch.

e.Gas valve.

f.Hot surface igniter.

g.Flame-sensing electrode.

h.Flame rollout switches.

14.Reinstall internal vent pipe, if applicable.

15.Reinstall vent connector on furnace vent elbow. Securely fasten vent connector to vent elbow with 2 field-supplied, corrosion-resistant, sheet metal screws located 180_ apart.

1-7/8

(47.6 mm)

A05026

Fig. 59 - Igniter Position-Top View

A91252

Fig. 60 - Cleaning Heat Exchanger Cell

16.Replace blower access door only, if it was removed.

17.Set thermostat above room temperature and check furnace for proper operation.

18.Verify blower airflow and speed changes between heating and cooling.

!WARNING

FIRE OR EXPLOSION HAZARD

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

Never use a match or other open flame to check for gas leaks. Use a soap-and-water solution.

19.Check for gas leaks.

20.Replace outer access door.

Step 3 — Sequence of Operation

NOTE: Furnace control must be grounded for proper operation or control will lockout. Control is grounded through green wire connected to gas valve and burner bracket screw. Using the schematic diagram in Fig. 57, follow the sequence of operation through the different modes. Read and follow the wiring diagram very carefully.

NOTE: If a power interruption occurs during a call for heat (W/W1 or W/W1-and-W2), the control run the blower for the selected blower off-delay period two seconds after power is restored and if the thermostat is still calling for gas heating. The LED light will flash code 12 during this period, after which the LED will be ON continuous, as long as no faults are detected. After this period, the furnace will respond to the thermostat normally.

The blower door must be installed for power to be conducted through the blower door interlock switch ILK to the furnace control CPU, transformer TRAN, inducer motor IDM, blower motor BLWM, hot-surface igniter HSI, and gas valve GV.

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Contents Ama CUT Hazard Safety ConsiderationsFurnace Reliability Hazard Dimensions IntroductionClearances to Combustibles Electrostatic Discharge ESD Precautions Procedure Codes and StandardsCarbon Monoxide Poisoning and Unit Damage Hazard LocationGeneral 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 ConnectionsSpeed External Static Pressure IN. WC Size Inlet Air Delivery CFM With FilterFurnace 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 HazardElectrical Connection to J-BOX Electrical DataBOX Relocation 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 Vent Height Appliance Application RequirementsInternal Area of Chimney 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 Burn Hazard START-UP, ADJUSTMENT, and Safety CheckGeneral Stage Furnace Setup Switch Description Start-Up ProceduresAdjustments Fire and Explosion HazardAltitude Derate Multiplier for U.S.A Redundant Automatic Gas Control ValveOrifice Hole Seconds Size of Test Dial For Revolution Gas Rate cu ft. /hrFurnace Overheating Hazard 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 Blower Motor and Wheel Cleaning AND/OR Replacing AIR FilterFilter Size Information IN. / MM Cleaning Heat Exchanger Unit Damage HazardSequence of Operation Igniter Position-Top View58CT Single-Speed Cooling Single-Stage Thermostat and Two-Speed Cooling Adaptive ModeThermidistat Mode Continuous Blower Mode Wiring DiagramsTroubleshooting Troubleshooting Guide 2-Speed KitAdapter Chimneyin Usedswitch Shutoffvent Blocked Catalog No58CT---10SI