Hubbell Electric Heater Company MSE Section III Scheduled Maintenance and Operation, Freezing

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SECTION III - SCHEDULED MAINTENANCE AND OPERATION

WARNING / CAUTION

Before performing any maintenance procedure, make certain power supply is OFF and cannot accidentally be turned on.

MAINTENANCE AND OPERATION

The water heater is automatic in its operation. It will maintain a full tank of water at the temperature setting of the thermostat. The water heater should not be turned on without first making sure that the tank is full of water and that all air has been released.

FREEZING

The tank should be fully drained in the event the electricity has been turned off and if there is danger of freezing.

QUARTERLY INSPECTION

1.Monitor thermostat

a.Let water heater completely heat to a designated thermostat setting.

b.After thermostat satisfies (that is, when the thermostat actually clicks off), draw water from heater.

c.Compare water temperature of drawn water to the temperature setting of the thermostat when it satisfies. Normal variation between the two points is approximately + 5°F.

d.If these two readings do not coincide within acceptable tolerances and verification has been made of the accuracy of the temperature-reading gauge, replace the thermostat.

2.Lift test lever on relief valve and let water run through valve for a period of approximately 10 seconds. This will help flush away any sediment that might build up in water passageways.

3.Inspect element flange for leakage as follows:

a.Shut off Power Supply.

b.Remove element housing cover.

c. Visually inspect heating element gasket for evidence of leaks.

d.Rub finger around gasket that is between the heating element and tank flange for any evidence of moisture. If moisture is present or a water drip is observed, follow procedure outlined in Section V.

4.Check for loose electrical connections. Tighten as necessary.

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Contents Electric Heater Company STRATFORD, CT Hubbell Electric Heater CompanyBOX Table of Contents Section Title Page Tank Connections Section I General Description and ConstructionTank Heating ElementTemperature High Limit Switch Control ThermostatOptions Magnetic ContactorOuter Shell and Insulation Low Water Cut-OffVacuum Relief Valve Dial Temperature and Pressure GaugeFused Low Voltage Transformer Individually Fused Elements On/Off SwitchElectro-Mechanical Timer Built-in Circuit BreakerWater Heater Placement Securing of HeaterMounting Dimensions Piping Installation Filling the HeaterElectrical Installation Final ChecksFreezing Section III Scheduled Maintenance and OperationMaintenance and Operation Quarterly InspectionAnnual Inspection Section IV Troubleshooting Symptom Probable Cause Corrective Action / RemedyPage Section V Servicing & Replacement of Parts Surface Temperature High Limit CUT-OFFImmersion Temperature High Limit CUT-OFF Heating Element Page Surface Mounted Thermostat Immersion Thermostat Magnetic Contactor Relief Valve Section VI Miscellaneous Charts and Formulas Element Chart FormulasTorque Values Section VII ABS Type Approval Program Page Page