Dura-Power Electric Models DSE-5 THRU DSE-120 COMMERCIAL WATER HEATERS • Installation • Operation • Maintenance • Checklist • Limited Warranty CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE. A DIVISION OF A.O.SMITH CORPORATION RENTON, WASHINGTON www.hotwater.com KEEP THIS MANUAL WITH THE HEATER FOR FUTURE REFERENCE. WHENEVER MAINTENANCE ADJUSTMENTS OR SERVICE IS REQUIRED. PART NO. 60047-004 REV.
DIMENSIONS Tank Capacity in Gallons 5 10 20 30 40 50 65 80 100 119 Maximum KW Input 3 6 18 24 36 90 90 90 90 90 A 20 /12 26 1/4 27 1/4 35 3/4 45 3/4 54 3/4 50 1/2 49 1/4 58 1/4 63 1/4 All Dimensions in Inches B C 16 1/4 21 1/2 18 3/4 24 20 1/2 27 20 1/2 27 20 1/2 27 20 1/2 27 24 1/2 30 1/4 26 1/2 32 1/4 26 1/2 32 1/4 28 33 3/4 D 5 1/4 5 1/4 5 3/4 5 3/4 5 3/4 5 3/4 7 7 7 7 1/2 Approx. Ship Wt.Lbs.
FOREWORD NEAR THE ELECTRICAL SYSTEM OF THE HEATER. NEVER TOUCH ELECTRICAL COMPONENTS WITH WET HANDS OR WHEN STANDING IN WATER. WHEN REPLACING FUSES ALWAYS USE THE CORRECT SIZE FOR THE CIRCUIT. SEE PAGE 14. Detailed installation diagrams are in this manual. These diagrams will serve to provide the installer with a reference for the materials and method of piping suggested. IT IS NECESSARY THAT ALL WATER PIPING AND THE ELECTRICAL WIRING BE INSTALLED AND CONNECTED AS SHOWN IN THE DIAGRAMS.
GETTING TO KNOW YOUR WATER HEATER Below is an illustration of the water heater with its features called out. The text of this manual will refer to the items shown.
GENERAL GENERAL SAFETY INFORMATION The installation must conform to these instructions and the local code authority having jurisdiction. Grounding and electrical wiring connected to the water heater must also conform to the latest version of the NATIONAL ELECTRICAL CODE and NFPA70. Copies of these codes may be obtained from American National Standards Institute, 1430 Broadway, New York, NY 10018.
The pressure setting of the relief valve should not exceed the pressure capacity of any component in the system. The temperature setting of the relief valve should not exceed 210°F. RELIEF DEVICES An unplugged 3/4” relief valve opening is provided for installing temperature and pressure relief valve.
PIPING DIAGRAM ONE OR TWO TEMPERATURE - ONE HEATER CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE, PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED. *PIPE TO OPEN DRAIN. INSTALL IN ACCORDANCE WITH ALL LOCAL CODES. ONE OR TWO TEMPERATURE - TWO HEATER DANGER: TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 & 18.
ONE OR TWO TEMPERATURE - THREE HEATERS CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE, PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED. *PIPE TO OPEN DRAIN. INSTALL IN ACCORDANCE WITH ALL LOCAL CODES. ONE OR TWO TEMPERATURE - FOUR HEATERS 8 DANGER: TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 & 18.
MEDIUM TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK DANGER: TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 & 18. IF HIGHER PREHEAT TEMPERATURES ARE NECCESARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.. *PIPE RELIEF VALVE TO OPEN DRAIN. †TANK TEMPERATURE CONTROL SET AT DESIRED TEMPERATURE (MAX. 170°). HEATER THERMOSTAT SET AT LEAST 5° HIGHER.
MEDIUM TEMPERATURE - TWO HEATERS VERTICAL STORAGE TANK DANGER: TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 & 18. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.. MEDIUM TEMPERATURE - TWO HEATERS HORIZONTAL STORAGE TANK RETURN LINE FROM FIXTURE CIRCULATING LOOP (IF USED) SHOULD CONNECT TO ANY OPENING NEAR BOTTOM OF TANK.
MEDIUM TEMPERATURE - THREE HEATERS VERTICAL STORAGE TANK DANGER: TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 & 18. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.. MEDIUM TEMPERATURE - THREE HEATERS HORIZONTAL STORAGE TANK * PIPE RELIEF VALVE TO OPEN DRAIN † TANK TEMPERATURE CONTROL SET AT DESIRED TEMPERATURE (MAX. 170°).
MEDIUM TEMPERATURE - FOUR HEATERS VERTICAL STORAGE TANK MEDIUM TEMPERATURE - FOUR HEATERS HORIZONTAL STORAGE TANK DANGER: TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGES 17 & 18. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES..
ELECTRICAL Voltage applied to the heater should not vary more than +5% to -10% of the model and rating plate marking for satisfactory operation. GENERAL The installation must conform to these instructions, the local code authority having jurisdiction, and the requirements of the power company. In the absence of code requirements follow the latest version of NFPA-70, The National Electrical Code which may be ordered from: American National Standards Institute, 1430 Broadway, New York, NY 10018.
AMPERAGE TABLE/OVERCURRENT PROTECTION CONTROL CIRCUIT The heater is equipped with 120 volt control circuit where all of the heating elements are switched on and off together. This is the standard circuit and may be used with up to five elements. This table provides the total connected heating element load in amperes for branch circuit conductor and over current protection sizing. Single-phase heaters are two wire circuits. Three-phase heaters are three wire circuits.
SMALL COMMERCIAL WIRE DIAGRAM 208-240V / 3PH SMALL COMMERCIAL WIRE DIAGRAM 208-240V / 3-1PH 15
3-1 PHASE CONVERSIONS In the case where the unit is phase convertible and it has only one contactor, jumper wires (provided) must be added according to the phase of the supply voltage. See the diagram below. For single-phase connection, jumpers A-C and B-D must be added. For three-phase connection, jumper B-C must be added.
SMALL COMMERCIAL WIRE DIAGRAM SINGLE PHASE SMALL COMMERCIAL WIRE DIAGRAM 300-600V / 3PH 17
OPERATION GENERAL DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/ OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON’S AGE AND TIME OF EXPOSURE. THE SLOWER RESPONSE TIME OF DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER.
Always close the front access door after making a temperature adjustment. Turn on electricity. 3. Attach hose to outlet opening of drain valve and direct end to drain. DRAINING 4. Open a nearby hot water faucet and the heater drain valve. The water heater must be drained if it is to be shut down and exposed to freezing temperatures. Maintenance and service procedures may also require draining the heater. 5.
5. Remove the bolts from each element. 6. Remove the elements from the openings. • • 7. 2. Check the fuses. • Use a twisting, pulling action to remove elements scaled beyond size of the tank openings. 3. If the water was excessively hot, and is now cold, the high limit switch may have operated. Brush loose scale from elements. • To reset, remove the plug from the top cover of the heater and push the reset button.
When such a condition is encountered, local codes or inspection agency should be consulted to determine which system is acceptable in your area. These may consist of: 4. • Installation of a second relief valve set to lower than the primary safety relief valve. • An expansion tank of suitable pressure and provision to avoid water logging. • Removal of the check valve. Tighten the bolts or, if necessary, follow the WATER AND LIME SCALE REMOVAL procedure to replace the gaskets.
LEAKAGE CHECKPOINTS INSTRUCTIONS: USE THIS ILLUSTRATION AS A GUIDE WHEN CHECKING FOR SOURCES OF WATER LEAKAGE. YOU OR YOUR DEALER MAY BE ABLE TO CORRECT WHAT APPEARS TO BE A PROBLEM. ANODE Where possible, remove or lift top cover to examine threads of fittings installed into tank for evidence of leakage. Correct fitting leaks as necessary. Relief valve operation and leakage may be due to water expansion during heating cycle or foreign material on seat of valve.
MODEL DSE LIMITED WARRANTY A.O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater: 1. THE TANK If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein, during the first THREE years after initial installation, the warrantor will supply a complete new A.O. Smith water heater of equivalent size and current model.
REPLACEMENT PARTS 5621 W. 115TH STREET, ALSIP, IL 60803 Phone: 800-433-2545 Fax: 800-433-2515 www.hotwater.com E-Mail: parts@hotwater.
