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Hubbell STH manual

Models: STH ST

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Hubbell STH manual

Contents

OPERATING AND MAINTENANCE MANUAL FOR BASE MODEL “ ST and STH ”STEAM FIRED WATER HEATER ELECTRIC HEATER COMPANYWARNING / CAUTION HUBBELL ELECTRIC HEATER COMPANY P.O. BOXSTRATFORD, CT PHONE 203 FAX SECTION TABLE OF CONTENTSTITLE PAGE #Page Page NOMENCLATURE FOR PARTS NOMENCLATURE FOR ACCESSORY PARTS Page CONSTRUCTION GENERAL DESCRIPTIONSECTION I - GENERAL DESCRIPTION AND CONSTRUCTION TANK Standard Tank ConstructionTANK CONNECTIONS OUTER SHELL, INSULATION, AND SUPPORTSSTEAM HEATING COIL STEAM OPERATING CONTROLS TrapsSteam Control Valves Double Solenoid Safety System Single Solenoid Safety SystemDial Temperature and Pressure Gauge OPTIONSSECTION II - INSTALLATION AND OPERATION WARNING / CAUTIONWATER HEATER PLACEMENT PIPING INSTALLATIONHOOK-UPOF AIR AND WATER OPERATED CONTROLS ELECTRICAL INSTALLATION Typical Piping DiagramSTARTUP FILLING THE HEATERSHUTDOWN WARNING / CAUTION SECTION III - SCHEDULED MAINTENANCE AND SERVICINGQUARTERLY INSPECTION ANNUAL 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 Symptom SECTION V - TROUBLESHOOTINGSee separate component O&M for additional details Probable CauseExcessive vibration High rate of flow beyondWater hammer TORQUE VALUES SECTION VI - MISCELLANEOUS CHARTS AND FORMULASMETRIC CONVERSIONS