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A.O. Smith
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Boiler
A.O. Smith
NW 37-670 warranty
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Contents
Main
DURA-POWER MODELS NW 37- 670
COMMERCIAL ELECTRIC WATER BOILERS
STANDARD
Installation Operation Service Maintenance Limited Warranty
FLOOD WARNING
DIMENSIONAL DAT A
SIZES AND DATA 45KW THRU 720KW
SIZES AND DATA 780KW THRU 3300KW
4
ELECTRICAL/RECOVERY DATA
Not Recommended
MODEL AND RATING PLATE
WATER BOILER SPECIFICATIONS
APPROVALS
FEATURES
FOREWORD
IMPORTANT
RELIEF VALVE
HIGH TEMPERATURE DEVICES
INSTALLATION
REQUIRED ABILITY
GENERAL
LOCATING THE BOILER
ELECTRICAL
Calculating Amperage/Overcurrent Protection
Boiler Circuits
Control Circuit
Portion of Table 310-16
Power Circuit
TYPICAL WIRING DIAGRAMS
WIRING DIAGRAM 480V THREE-PHASE (WYE)
SYSTEM CLEANING
WARNING
OPERATION
GENERAL
WARNING
FILLING
START UP
MAINTENANCE
FLUSHING
SEDIMENT REMOVAL
WATER AND LIME SCALE REMOVAL
CHECKLIST
Not enough or no heat
Water is too hot
Boiler makes sounds
Water leakage is suspected
NW-37 THRU NW-670 ELECTRIC HOT WATER BOILER LIMITED WARRANTY