State Industries
SW 37-670 Division of A. O. Smith Corporation RENTON, Washington
Troubleshooting
Specifications
Install
Wiring Diagrams
Dimension
Maintenance
Actual Configuration MAY Vary
High Temperature Limits
Safety
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A DIVISION OF A. O. SMITH CORPORATION
RENTON, WASHINGTON
Technical Support: 800
527-1953
Parts Department: 800
433-2515
www.statewaterheaters.com
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Contents
Installation Operation Service Maintenance Limited Warranty
Commercial Electric Boilers
Safe INSTALLATION, USE and Service
Grounding Instructions
General Safety Information
Precautions Hydrogen GAS Flammable
Table of Contents
Introduction
Dimension Data
Sizes and Data NW37 Thru NW150
Sizes and Data NW220 Thru
Dimension Data cont’d
Boiler Specifications Standard
Features and Components
Actual Configuration MAY Vary
Facts to Consider About the Location
Approvals
Model and Rating Locating the Boiler
Installation
Required Ability
General
Pressure Relief Valve
Closed Water Systems
Thermal Expansion
Electrical Data
Branch Circuit
Calculating Amperage Overcurrent Protection
Boiler Circuits
Wiring Diagrams
Diagram Three Phase Delta with Step Control
Diagram Three Phase WYE with Step Control
High Temperature Limits
Temperature Regulation
Operation
Filling the Boiler
Temperature Controls
Draining
Maintenance
Flushing
Sediment Removal
Water and Lime Scale Removal
Troubleshooting Checklist
System Water Test
SW-37 Thru SW-670 Electric HOT Water Boiler Limited Warranty
Division of A. O. Smith Corporation RENTON, Washington
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