Hubbell Electric Heater Company E manual Section V Servicing & Replacement of Parts

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SECTION V - SERVICING & REPLACEMENT OF PARTS

WARNING / CAUTION

Before servicing or replacing any part make sure to turn the power supply switch to the OFF position.

SURFACE TEMPERATURE HIGH LIMIT CUT-OFF

1.Disconnect power from unit.

2.Remove access cover.

3.Disconnect the four (4) 14 gauge wires or three (3) 14 gauge wires and a jumper, as required.

Control Wires

High-Limit Cut-Off Switch

Manual Reset

Control Wires

Temperature Controller

4.Disconnect the high-limit cut-off switch from the temperature controller by pulling the cut- off switch up and away from temperature controller.

5.Replace control and install new high limit switch by performing above steps in reverse order.

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Contents Electric Heater Company STRATFORD, CT Hubbell Electric Heater CompanyTable of Contents Section Title Page Tank Section I General Description and ConstructionTank Connections Heating ElementControl Thermostat Temperature High Limit SwitchOptions Outer Shell and InsulationPiping Installation Water Heater PlacementFilling the Heater Electrical InstallationFinal Checks Maintenance and Operation Section III Scheduled Maintenance and OperationFreezing Quarterly InspectionAnnual Inspection Symptom Probable Cause Corrective Action / Remedy Section IV TroubleshootingSurface Temperature High Limit CUT-OFF Section V Servicing & Replacement of PartsImmersion Temperature High Limit CUT-OFF Heating Element Page Page Surface Mounted Thermostat Immersion Thermostat Relief Valve Section VI Miscellaneous Charts and Formulas Element Chart Formulas Torque Values