Hubbell Electric Heater Company MSE manual Magnetic Contactor, Outer Shell and Insulation, Options

Page 7

MAGNETIC CONTACTOR

The magnetic contactor(s) is a heavy-duty resistive load type rated for 100,000 cycles. The contactor supplies power to the heating element(s) and is sized based on the resistive load(non-inductive) rating of the circuit. The contactor supplies power only when the thermostatic switch is engaged, thereby pulling in the contacts until the desired temperature is reached. At this point, the contacts will drop out, which in turn disconnects power from the elements.

OUTER SHELL AND INSULATION

The tank is encapsulated in 2-inch thick polyurethane foam insulation. The insulation is protected by a high impact non-corroding colorized composite protective jacket.

OPTIONS

The following optional features may be included in your water heater. Reference included drawing specific to your heater for further details.

Low Water Cut-Off

Used as a safety device, the electronic low water cut-off is used to detect a low water situation and disengage the operating coils in the magnetic contactor(s). Once the condition is remedied, the low water cut-off switch is automatically reset.

Low Water Cut-Off Probe

Low Water Cut-Off Relay

7

Image 7
Contents Electric Heater Company BOX Hubbell Electric Heater CompanySTRATFORD, CT Table of Contents Section Title Page Heating Element Section I General Description and ConstructionTank Tank ConnectionsControl Thermostat Temperature High Limit SwitchLow Water Cut-Off Magnetic ContactorOuter Shell and Insulation OptionsFused Low Voltage Transformer Dial Temperature and Pressure GaugeVacuum Relief Valve Built-in Circuit Breaker On/Off SwitchElectro-Mechanical Timer Individually Fused ElementsSecuring of Heater Water Heater PlacementMounting Dimensions Filling the Heater Piping InstallationFinal Checks Electrical InstallationQuarterly Inspection Section III Scheduled Maintenance and OperationMaintenance and Operation FreezingAnnual 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