Wiring Diagrams | State Industries SW 37-670 specs

13

DIAGRAM 2.

THREE PHASE WYE WITH THERMOSTAT

DIAGRAM 1.

THREE PHASE DELTA WITH THERMOSTAT

WIRING DIAGRAMS

NOTE(S):

1.IF A MANUAL RESET HLMT IS USED, THE SECOND AUTO RESET HLMT SWITCH IS NOT USED.

STD. WIRING

OPTIONAL OR FIELD WIRING AS REQ’D

NOTE(S):

1.IF A MANUAL RESET HLMT IS USED, THE SECOND AUTO RESET HLMT SWITCH IS NOT USED.

STD. WIRING

OPTIONAL OR FIELD WIRING AS REQ’D

CONTACTOR COIL

INDICATION LIGHT

Image 13

State Industries SW 37-670 instruction manual Wiring Diagrams

Contents

Commercial Electric Boilers Installation Operation Service Maintenance Limited Warranty Safe INSTALLATION, USE and Service Precautions Hydrogen GAS Flammable General Safety InformationGrounding Instructions Introduction Table of Contents Sizes and Data NW37 Thru NW150 Dimension Data Sizes and Data NW220 Thru Boiler Specifications Standard Dimension Data cont’d Actual Configuration MAY Vary Features and Components Model and Rating Locating the Boiler ApprovalsFacts to Consider About the Location Required Ability InstallationGeneral Pressure Relief Valve Thermal Expansion Closed Water Systems Branch Circuit Electrical DataCalculating Amperage Overcurrent Protection Boiler Circuits Wiring Diagrams Diagram Three Phase WYE with Step Control Diagram Three Phase Delta with Step Control Temperature Regulation High Temperature LimitsOperation Filling the Boiler Draining Temperature Controls Flushing MaintenanceSediment Removal Water and Lime Scale Removal System Water Test Troubleshooting Checklist SW-37 Thru SW-670 Electric HOT Water Boiler Limited Warranty Division of A. O. Smith Corporation RENTON, Washington