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Hubbell
STH manual
Models:
STH
ST
1
5
31
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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
OPERATING AND MAINTENANCE MANUAL FOR
BASE MODEL “ ST and STH ”
STEAM FIRED WATER HEATER
ELECTRIC HEATER COMPANY
STRATFORD, CT PHONE 203 FAX
WARNING / CAUTION
HUBBELL ELECTRIC HEATER COMPANY P.O. BOX
SECTION
TABLE OF CONTENTS
TITLE
PAGE #
Page
Page
NOMENCLATURE FOR PARTS
NOMENCLATURE FOR ACCESSORY PARTS
Page
CONSTRUCTION
GENERAL DESCRIPTION
SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION
TANK Standard Tank Construction
STEAM HEATING COIL
TANK CONNECTIONS
OUTER SHELL, INSULATION, AND SUPPORTS
Steam Control Valves
STEAM OPERATING CONTROLS
Traps
Double Solenoid Safety System
Single Solenoid Safety System
Dial Temperature and Pressure Gauge
OPTIONS
SECTION II - INSTALLATION AND OPERATION
WARNING / CAUTION
WATER HEATER PLACEMENT
PIPING INSTALLATION
HOOK-UPOF AIR AND WATER OPERATED CONTROLS
ELECTRICAL INSTALLATION
Typical Piping Diagram
STARTUP
FILLING THE HEATER
SHUTDOWN
WARNING / CAUTION
SECTION III - SCHEDULED MAINTENANCE AND SERVICING
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
Symptom
SECTION V - TROUBLESHOOTING
See separate component O&M for additional details
Probable Cause
Water hammer
Excessive vibration
High rate of flow beyond
TORQUE VALUES
SECTION VI - MISCELLANEOUS CHARTS AND FORMULAS
METRIC CONVERSIONS
