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Hubbell
STH manual
Models:
STH
ST
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4
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Troubleshooting
Install
Typical Piping Diagram
Maintenance
Section Iv - Adjustment Of Temperature Regulators
Dial Temperature and Pressure Gauge
Nomenclature For Accessory Parts
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Contents
BASE MODEL “ ST and STH ”
OPERATING AND MAINTENANCE MANUAL FOR
STEAM FIRED WATER HEATER
ELECTRIC HEATER COMPANY
HUBBELL ELECTRIC HEATER COMPANY P.O. BOX
WARNING / CAUTION
STRATFORD, CT PHONE 203 FAX
TABLE OF CONTENTS
SECTION
TITLE
PAGE #
Page
Page
NOMENCLATURE FOR PARTS
NOMENCLATURE FOR ACCESSORY PARTS
Page
GENERAL DESCRIPTION
CONSTRUCTION
SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION
TANK Standard Tank Construction
OUTER SHELL, INSULATION, AND SUPPORTS
TANK CONNECTIONS
STEAM HEATING COIL
Traps
STEAM OPERATING CONTROLS
Steam Control Valves
Single Solenoid Safety System
Double Solenoid Safety System
Dial Temperature and Pressure Gauge
OPTIONS
WARNING / CAUTION
SECTION II - INSTALLATION AND OPERATION
WATER HEATER PLACEMENT
PIPING INSTALLATION
HOOK-UPOF AIR AND WATER OPERATED CONTROLS
Typical Piping Diagram
ELECTRICAL INSTALLATION
FILLING THE HEATER
STARTUP
SHUTDOWN
SECTION III - SCHEDULED MAINTENANCE AND SERVICING
WARNING / CAUTION
QUARTERLY INSPECTION
ANNUAL INSPECTION
Page
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
SECTION V - TROUBLESHOOTING
Symptom
See separate component O&M for additional details
Probable Cause
High rate of flow beyond
Excessive vibration
Water hammer
SECTION VI - MISCELLANEOUS CHARTS AND FORMULAS
TORQUE VALUES
METRIC CONVERSIONS
