Hubbell Electric Heater Company MSE manual On/Off Switch, Individually Fused Elements

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On/Off Switch

A built-in non-fused On/Off disconnect switch may be supplied with the control panel to disconnect power to the control panel control and power circuit wiring.

Individually Fused Elements

To prevent the possibility of damage to circuits and elements in case of electrical overloads, fuses may be supplied for each circuit. Two types of fuses may be used; a type NON for voltages less than 250- volt or type JJS for voltages less than 600-volt.

Type JJS

Type NON

Built-in Circuit Breaker

A built-in circuit breaker may be provided with or without shunt trip protection for protection from circuit overload.

Electro-Mechanical Timer

An electro-mechanical 7-day time clock with battery back-up may be supplied for specific timing operations. A set of instructions will be supplied with the timer.

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Contents Electric Heater Company Hubbell Electric Heater Company BOXSTRATFORD, CT Table of Contents Section Title Page Tank Section I General Description and ConstructionTank Connections Heating ElementControl Thermostat Temperature High Limit SwitchOuter Shell and Insulation Magnetic ContactorOptions Low Water Cut-OffDial Temperature and Pressure Gauge Fused Low Voltage TransformerVacuum Relief Valve Electro-Mechanical Timer On/Off SwitchIndividually Fused Elements Built-in Circuit BreakerSecuring of Heater Water Heater PlacementMounting Dimensions Filling the Heater Piping InstallationFinal Checks Electrical InstallationMaintenance and Operation Section III Scheduled Maintenance and OperationFreezing Quarterly InspectionAnnual Inspection Symptom Probable Cause Corrective Action / Remedy Section IV TroubleshootingPage Surface Temperature High Limit CUT-OFF Section V Servicing & Replacement of PartsImmersion Temperature High Limit CUT-OFF Heating Element Page Surface Mounted Thermostat Immersion Thermostat Magnetic Contactor Relief Valve Formulas Section VI Miscellaneous Charts and Formulas Element ChartTorque Values Section VII ABS Type Approval Program Page Page