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Hubbell STH manual SINGLE SAFETY SOLENOID SYSTEM if installed

Models: STH ST

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SINGLE SAFETY SOLENOID SYSTEM (if installed)

SINGLE SAFETY SOLENOID SYSTEM (if installed)

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Hubbell STH manual SINGLE SAFETY SOLENOID SYSTEM if installed

Contents

ELECTRIC HEATER COMPANY BASE MODEL “ ST and STH ”OPERATING AND MAINTENANCE MANUAL FOR STEAM FIRED WATER HEATERSTRATFORD, CT PHONE 203 FAX WARNING / CAUTIONHUBBELL ELECTRIC HEATER COMPANY P.O. BOX PAGE # TABLE OF CONTENTSSECTION TITLEPage Page NOMENCLATURE FOR PARTS NOMENCLATURE FOR ACCESSORY PARTS Page TANK Standard Tank Construction GENERAL DESCRIPTIONCONSTRUCTION SECTION I - GENERAL DESCRIPTION AND CONSTRUCTIONSTEAM HEATING COIL TANK CONNECTIONSOUTER SHELL, INSULATION, AND SUPPORTS Steam Control Valves STEAM OPERATING CONTROLSTraps OPTIONS Single Solenoid Safety SystemDouble Solenoid Safety System Dial Temperature and Pressure GaugePIPING INSTALLATION WARNING / CAUTIONSECTION II - INSTALLATION AND OPERATION WATER HEATER PLACEMENTHOOK-UPOF AIR AND WATER OPERATED CONTROLS ELECTRICAL INSTALLATION Typical Piping DiagramSTARTUP FILLING THE HEATERSHUTDOWN ANNUAL INSPECTION SECTION III - SCHEDULED MAINTENANCE AND SERVICINGWARNING / CAUTION QUARTERLY INSPECTIONPage a.Shut down unit as described in Section Page Page SINGLE SAFETY SOLENOID SYSTEM if installed DOUBLE SAFETY SOLENOID SYSTEM if installed SECTION IV - ADJUSTMENT OF TEMPERATURE REGULATORS 5.ADJUSTMENT OF PILOT OPERATED VALVES 5Allow unit to heat until the valve closes off Probable Cause SECTION V - TROUBLESHOOTINGSymptom See separate component O&M for additional detailsWater hammer Excessive vibrationHigh rate of flow beyond TORQUE VALUES SECTION VI - MISCELLANEOUS CHARTS AND FORMULASMETRIC CONVERSIONS