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STH manual Nomenclature For Parts
Models:
STH
ST
1
6
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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
Page 6
Image 6
NOMENCLATURE FOR PARTS
6
Page 5
Page 7
Page 6
Image 6
Page 5
Page 7
Contents
STEAM FIRED WATER HEATER
BASE MODEL “ ST and STH ”
OPERATING AND MAINTENANCE MANUAL FOR
ELECTRIC HEATER COMPANY
WARNING / CAUTION
HUBBELL ELECTRIC HEATER COMPANY P.O. BOX
STRATFORD, CT PHONE 203 FAX
TITLE
TABLE OF CONTENTS
SECTION
PAGE #
Page
Page
NOMENCLATURE FOR PARTS
NOMENCLATURE FOR ACCESSORY PARTS
Page
SECTION I - GENERAL DESCRIPTION AND CONSTRUCTION
GENERAL DESCRIPTION
CONSTRUCTION
TANK Standard Tank Construction
TANK CONNECTIONS
OUTER SHELL, INSULATION, AND SUPPORTS
STEAM HEATING COIL
STEAM OPERATING CONTROLS
Traps
Steam Control Valves
Dial Temperature and Pressure Gauge
Single Solenoid Safety System
Double Solenoid Safety System
OPTIONS
WATER HEATER PLACEMENT
WARNING / CAUTION
SECTION II - INSTALLATION AND OPERATION
PIPING INSTALLATION
HOOK-UPOF AIR AND WATER OPERATED CONTROLS
Typical Piping Diagram
ELECTRICAL INSTALLATION
FILLING THE HEATER
STARTUP
SHUTDOWN
QUARTERLY INSPECTION
SECTION III - SCHEDULED MAINTENANCE AND SERVICING
WARNING / CAUTION
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
See separate component O&M for additional details
SECTION V - TROUBLESHOOTING
Symptom
Probable Cause
Excessive vibration
High rate of flow beyond
Water hammer
SECTION VI - MISCELLANEOUS CHARTS AND FORMULAS
TORQUE VALUES
METRIC CONVERSIONS
