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Hubbell Electric Heater Company manual Terminal Block 2 - Magnetic Contactor, Heating Element

Models: B

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1 – Terminal Block

2 – Magnetic Contactor

3 – Heating Element

4 – Low Water Cut-Off, if supplied

5 – Transformer, 480-Volt/240-Volt, installed on 480-Volt models with low water cut-off only 6 – High-Temperature Limit Switch

7 – Control Thermostat

Page 12

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Hubbell Electric Heater Company Terminal Block 2 - Magnetic Contactor, Heating Element, Low Water Cut-Off,if supplied

Contents

BASE MODEL “ B ” OPERATING AND MAINTENANCE MANUAL FORELECTRIC BOOSTER HEATER ELECTRIC HEATER COMPANYHUBBELL ELECTRIC HEATER COMPANY P.O. BOX STRATFORD, CT PHONE 203 FAXWARNING / CAUTION TABLE OF CONTENTS SECTIONTITLE PAGE #Page GENERAL DESCRIPTION CONSTRUCTIONSECTION I - GENERAL DESCRIPTION AND CONSTRUCTION TANKTEMPERATURE HIGH LIMIT SWITCH CONTROL THERMOSTATMAGNETIC CONTACTOR OUTER SHELL , INSULATION, AND SUPPORTSDial Temperature and Pressure Gauge OPTIONSLow Water Cut-Off Fused Low Voltage TransformerPressure Reducing Valve Stainless Steel Outer JacketSuspension Straps WATER HEATER PLACEMENT PIPING INSTALLATIONWARNING / CAUTION SECTION II - INSTALLATIONELECTRICAL INSTALLATION FILLING THE HEATERFINAL CHECKS 1 - Terminal Block 2 - Magnetic Contactor 3 - Heating Element4 - Low Water Cut-Off,if supplied 7 - Control Thermostat6 – High-TemperatureLimit Switch 1 - Terminal Block 2 - Magnetic Contactor3 - Heating Element 4 - Low Water Cut-Off,if suppliedPage SECTION III - SCHEDULED MAINTENANCE AND OPERATION MAINTENANCE AND OPERATIONFREEZING QUARTERLY INSPECTIONANNUAL INSPECTION 1.Flush tank as follows a.Shut off power supplyg.Turn power supply ON b.Close valve on hot water outlet pipingSECTION IV - TROUBLESHOOTING SymptomProbable Cause Corrective Action / RemedyWater temperature below Faulty thermostatCheck thermostat adjustment settings at all timesSECTION V - SERVICING & REPLACEMENT OF PARTS SURFACE TEMPERATURE HIGH LIMIT CUT-OFFWARNING / CAUTION 1.Disconnect power from unit HEATING ELEMENTIMMERSION THERMOSTAT 1.Disconnect power from unit 2.Disconnect line and load wires to contactor3.Disconnect two 2 14 gauge control circuit wires Control Wires Line Wires Load WiresRELIEF VALVE SECTION VI - MISCELLANEOUS CHARTS AND FORMULAS ELEMENT CHARTFORMULAS TORQUE VALUES