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Instruction Manual
coMMercIal electrIc BoIlers
Models sw 37-670
InstallatIon - operatIon - serVIce -
MaIntenance - lIMIted warranty
A DIVISION OF A. O. SMITH CORPORATION
RENTON, WASHINGTON
www.statewaterheaters.com
asMe
Thank you for buying this energy efficient boiler
from us. We appreciate your confidence in our
products.
place these InstructIons adjacent to BoIler and notIfy owner to keep for future reference.
PRINTED 0110
316393-000
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Table of Contents
Summary of Contents for State Water Heaters ASME SW 37-670
- Page 1 Instruction Manual coMMercIal electrIc BoIlers Models sw 37-670 InstallatIon - operatIon - serVIce - MaIntenance - lIMIted warranty A DIVISION OF A. O. SMITH CORPORATION RENTON, WASHINGTON www.statewaterheaters.com asMe Thank you for buying this energy efficient boiler from us. We appreciate your confidence in our products.
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Page 2: Safe Installation, Use And Service
safe InstallatIon, use and serVIce Your safety and the safety of others is extremely important in the installation, use, and servicing of this boiler. Many safety-related messages and instructions have been provided in this manual and on your own boiler to warn you and others of a potential injury hazard. -
Page 3: Grounding Instructions
precautIons DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDER WATER. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system which has been under water. If the unit is exposed to the following, do not operate boiler until all corrective steps have been made by a qualified service agency. -
Page 4: Table Of Contents
SAFE INSTALLATION, USE AND SERVICE...2 GENERAL SAFETY INFORMATION ...3 Precautions ...3 Hydrogen Gas (Flammable) ...3 TABLE OF CONTENTS ...4 INTRODUCTION ...4 Preparing for the Installation ...4 DIMENSIONS AND CAPACITIES DATA ...5 FEATURES AND COMPONENTS ...8 APPROVALS ...9 MODEL AND RATING ...9 LOCATING THE NEW BOILER ...9 Facts to Consider About the Location ...9 INSTALLATION ...10... -
Page 5: Dimensions And Capacities Data
sIZes and data nw37 thru nw150 Model Number Prefix Gal. Cap. Std. KW Input 105K 120K 150K 180K 210K 240K 270K 300K 330K 390K 420K 450K 480K 540K 600K 660K 720K * All fittings under 4” will be threaded type. All fittings 4” and larger will be flanged. 3” fittings extend 4” beyond jacket. ** Where overall height is a problem a larger diameter vessel with a reduced height may be furnished. - Page 6 Model Number Std. KW Prefix Gal. Cap. Input 780K 840K 900K 960K 1020K 1080K 1140K 1200K 1260K 1380K 1500K 1620K 1740K 1800K 1860K 1980K 2100K 2200K 2340K 2460K 2580K 2700K 2820K 2940K 3060K 3180K 3300K NOTE: For boilers 3400KW to 6000KW, consult factory. * All fittings under 4”...
- Page 7 Model Number Std. KW Output Prefix Gal. Cap. Input 153,585 204,720 255,975 307,170 105K 358,365 120K 409,560 150K 511,950 180K 614,340 210K 716,730 240K 819,120 270K 921,510 300K 1,023,900 330K 1,126,290 360K 1,228,680 390K 1,331,070 420K 1,433,460 450K 1,535,850 480K 1,638,240 540K 1,843,020...
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Page 8: Features And Components
features and coMponents actual confIGuratIon May Vary. -
Page 9: Approvals
facts to consIder aBout the locatIon Carefully choose a location for the boiler. The placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance. Whether replacing an old boiler or putting the boiler in a new location, the following critical points must be observed. -
Page 10: Installation
requIred aBIlIty Installation and service of this boiler requires ability equivalent to that of a qualified agency (page 2) in the field involved. Plumbing and electrical work is required. General The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power company. -
Page 11: Closed Water Systems
closed water systeMs Water supply systems may, because of code requirements or such conditions as high line pressure, among others, have installed devices such as pressure reducing valves, check valves, and back flow preventers. Devices such as these cause the water system to be a closed system. -
Page 12: Electrical Data
General Check the boiler model and rating plate information against the characteristics of the branch circuit electrical supply. Do not connect the boiler to an improper source of electricity. Voltage applied to the boiler should not vary more than + 5% to -10% of the model and rating plate marking for satisfactory operation. -
Page 13: Wiring Diagrams
NOTE(S): 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): IF A MANUAL RESET HLMT IS USED, THE SECOND AUTO RESET HLMT SWITCH IS NOT USED. STD. - Page 14 NOTE(S): 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 NOTE(S): SUBSTITUTE A MANUAL RESET HLMT SWITCH FOR ONE(1) OF THE AUTO RESET HLMT SWITCHES. STD.
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Page 15: Operation
IMportant IT IS RECOMMENDED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE BOILER. AT THIS TIME THE USER SHOULD NOT HESITATE TO ASK THE TECHNICIAN ANY QUESTIONS WHICH THEY MAY HAVE IN REGARD TO THE OPERATION AND MAINTENANCE OF THE BOILER. BEFORE FILLING THE SYSTEM FOR OPERATION the hot water system should be internally cleaned and flushed to remove any contaminants which may have accumulated during installation. -
Page 16: Temperature Controls
teMperature controls The boilers covered in this instruction manual are equipped with (adjustable) thermostat or step control to regulate water temperature and other controls to provide safety features. See the wiring diagrams on page 13 & 14 and/or literature included with this manual for additional information. -
Page 17: Schedule
Boiler maintenance includes periodic tank flushing and cleaning, and removal of lime scale from the heating elements. Circulating pumps should be oiled. MaIntenance schedule Component Operation Interval Flushing Monthly Tank Sediment As Needed Removal Lime Scale Elements As Needed Removal Circulating Pump(s) Oiling Per pump makers instructions... -
Page 18: Troubleshooting Checklist
Lime scale should be removed from the elements by dissolving the accumulation in UN•LIME® delimer. UN•LIME is a non-muriatic delimer, available through your dealer or distributor. Do not use muratic or hydrochloric acid base deliming solutions to remove lime scale from the elements. Do not pour delimer into tank. All models: 1. -
Page 19: Warranty
sw-37 thru sw-670 electrIc hot water BoIler lIMIted warranty State Water Heaters, the warrantor, extends the following LIMITED WARRANTY to the owner of this boiler. 1. THE TANK If the tank in this boiler shall prove upon examination by the warrantor to have leaked due to natural corrosion from water therein, during the FIRST year after initial installation, the warrantor will at its option, repair it or provide a replacement tank less elements and controls of equivalent size and then current model. - Page 20 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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