State Industries SW 37-670 instruction manual Diagram Three Phase Delta with Step Control

Page 14

NOTE(S):

1.SUBSTITUTE A MANUAL RESET HLMT SWITCH FOR ONE(1) OF

THE AUTO RESET HLMT SWITCHES. STD. WIRING

OPTIONAL OR FIELD WIRING AS REQ’D

CONTACTOR COIL

INDICATION LIGHT

DIAGRAM 3.

THREE PHASE DELTA WITH STEP CONTROL

1 OFF

 

 

ON 2200

 

 

 

 

 

ON 135

 

 

2 OFF

 

 

 

 

4 OFF

 

 

ON 0-10VDCINPUTS

3 OFF

 

 

ON 4-20MA

 

 

 

 

 

 

 

 

 

 

 

 

 

5 DS

 

 

 

PROP

 

 

 

 

 

 

6 PROG

 

 

UN

 

 

 

 

 

 

7 OFF

 

 

VER

 

 

 

 

 

 

8 SEC

 

 

MN

 

 

1

 

 

DELAY 1

DELAY

3

 

 

DELAY 3

2

 

 

DELAY 2

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

-1-

STAGES

 

 

7

 

 

-5-

5

 

 

-2-

 

 

 

 

 

 

6

 

 

-4-

 

 

 

 

 

 

8

 

 

 

 

 

 

-16-

 

 

THE ABOVE DIP SWITCH SETTINGS

ARE AN EXAMPLE FOR THE FOLLOWING: 2200 OHM PROPORTIONAL PROGRESSIVE

VERNER “OFF”

SECONDS

10SECOND

3STAGE

NOTE(S):

1.SUBSTITUTE A MANUAL RESET HLMT SWITCH FOR ONE(1) OF

THE AUTO RESET HLMT SWITCHES. STD. WIRING

OPTIONAL OR FIELD WIRING AS REQ’D

CONTACTOR COIL

INDICATION LIGHT

DIAGRAM 4.

THREE PHASE WYE WITH STEP CONTROL

1 OFF

 

 

ON 2200

 

 

 

 

 

ON 135

 

 

2 OFF

 

 

 

 

4 OFF

 

 

ON 0-10VDCINPUTS

3 OFF

 

 

ON 4-20MA

 

 

 

 

 

 

 

 

 

 

 

 

 

5 DS

 

 

 

PROP

 

 

 

 

 

 

6 PROG

 

 

UN

 

 

 

 

 

 

7 OFF

 

 

VER

 

 

 

 

 

 

8 SEC

 

 

MN

 

 

1

 

 

DELAY 1

DELAY

3

 

 

DELAY 3

2

 

 

DELAY 2

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

-1-

STAGES

 

 

7

 

 

-5-

5

 

 

-2-

 

 

 

 

 

 

6

 

 

-4-

 

 

 

 

 

 

8

 

 

 

 

 

 

-16-

 

 

THE ABOVE DIP SWITCH SETTINGS

ARE AN EXAMPLE FOR THE FOLLOWING: 2200 OHM PROPORTIONAL PROGRESSIVE

VERNER “OFF”

SECONDS

10SECOND

3STAGE

14

Image 14
Contents Installation Operation Service Maintenance Limited Warranty Commercial Electric BoilersSafe INSTALLATION, USE and Service Grounding Instructions General Safety InformationPrecautions Hydrogen GAS Flammable Table of Contents IntroductionDimension Data Sizes and Data NW37 Thru NW150Sizes and Data NW220 Thru Dimension Data cont’d Boiler Specifications StandardFeatures and Components Actual Configuration MAY VaryFacts to Consider About the Location ApprovalsModel and Rating Locating the Boiler General InstallationRequired Ability Pressure Relief ValveClosed Water Systems Thermal ExpansionCalculating Amperage Overcurrent Protection Electrical DataBranch Circuit Boiler CircuitsWiring Diagrams Diagram Three Phase Delta with Step Control Diagram Three Phase WYE with Step ControlOperation High Temperature LimitsTemperature Regulation Filling the BoilerTemperature Controls DrainingSediment Removal MaintenanceFlushing Water and Lime Scale RemovalTroubleshooting Checklist System Water TestSW-37 Thru SW-670 Electric HOT Water Boiler Limited Warranty Division of A. O. Smith Corporation RENTON, Washington