1

ConesCones

Time & TemperatureTime & Temperature Permanent record of each Permanent record of each

firingfiring• Inexpensive 10¢ per coneInexpensive 10¢ per cone

Troubleshooting aidTroubleshooting aid• Use a Cone Template for Use a Cone Template for

accuracyaccuracy Best way to detect a Best way to detect a

decalibrating Thermocoupledecalibrating Thermocouple

2

Loading the kilnLoading the kiln

ShelvesShelves• Size - 2” less than kiln Size - 2” less than kiln

diameterdiameter

• ClearanceClearance» Shelves 1” from wallsShelves 1” from walls

» Shelves 2” from Shelves 2” from ThermocoupleThermocouple

» Ware 2” from wallsWare 2” from walls

• LocationLocation» First shelf 1” up from floorFirst shelf 1” up from floor

3

Loading, continuedLoading, continued

Density of loadDensity of load• Hot & Cold spotsHot & Cold spots

• UniformityUniformity

Tall items toward the Tall items toward the centercenter

Allow space for air flowAllow space for air flow Stagger ½ shelves if Stagger ½ shelves if

possiblepossible

4

Cooling and UnloadingCooling and Unloading

Run the downdraft vent systemRun the downdraft vent system Force cooling with a fanForce cooling with a fan

• Lid closed, peep plugs are inLid closed, peep plugs are in• Small fan blowing at controllerSmall fan blowing at controller

» Wind velocity Wind velocity air exchange around kilnair exchange around kiln cooling timecooling time

Unload safely at (or below) 125°FUnload safely at (or below) 125°F

5

Preventive MaintenancePreventive Maintenance

Electrical itemsElectrical items• ThermocouplesThermocouples• RelaysRelays• ElementsElements

Mechanical itemsMechanical items• Lid brace & hingeLid brace & hinge• Section HandlesSection Handles• BrickworkBrickwork

6

Maintenance, electricalMaintenance, electrical

Opening Electrical Opening Electrical BoxBox• Unplug Kiln orUnplug Kiln or

» Disconnect powerDisconnect power

• Phillips screwdriverPhillips screwdriver• Remove all screws Remove all screws

on Left side of boxon Left side of box

7

Maintenance, electricalMaintenance, electrical

Thermocouple ReplacementThermocouple Replacement• Unplug KilnUnplug Kiln

• Open BoxOpen Box

• Unscrew Porcelain BlockUnscrew Porcelain Block

• Loosen Screws and Remove Loosen Screws and Remove ThermocoupleThermocouple

• Install in Reverse OrderInstall in Reverse Order

8

Maintenance, mechanicalMaintenance, mechanical

Lid Brace & HingeLid Brace & Hinge• Anchor padsAnchor pads

» LidLid

» BodyBody

9

Maintenance, mechanicalMaintenance, mechanical

Lid HingeLid Hinge• Screws Screws

• Cotter pinCotter pin

• Struts Struts

Other hardwareOther hardware• HandlesHandles

• LatchesLatches

10

Maintenance, mechanicalMaintenance, mechanical

Temporary Brick RepairTemporary Brick Repair• Unplug KilnUnplug Kiln• Insert pins at 30 degree Insert pins at 30 degree

angle to form a ledgeangle to form a ledge• Space pins every ¾ inchSpace pins every ¾ inch

11

RepairsRepairs

RelaysRelays• Unplug KilnUnplug Kiln• Remove BoxRemove Box• Remove BaffleRemove Baffle• Label and Remove Label and Remove

Relay Control Wiring Relay Control Wiring • Unscrew and Remove Unscrew and Remove

RelayRelay• Install in Reverse OrderInstall in Reverse Order

12

RepairsRepairs

Element ReplacementElement Replacement• Unplug KilnUnplug Kiln• Open Control BoxOpen Control Box• Cut Element Close To ConnectorCut Element Close To Connector• Remove PinsRemove Pins• Carefully Remove ElementCarefully Remove Element• Insert New ElementInsert New Element• Crimp On Feeder Wire With Barrel Crimp On Feeder Wire With Barrel

ConnectorConnector• Close and Fasten BoxClose and Fasten Box

Use Factory Original PartsUse Factory Original Parts

13

Checking VoltageChecking Voltage

Locate receptacleLocate receptacle Use insulated Use insulated

probesprobes Insert at slight Insert at slight

angleangle