A. O. Smith DEN-6 Installation Manual
FOR INSTALLATION BY QUALIFIED SERVICE PERSONNEL ONLY
CONVERSION KIT INSTRUCTIONS
for Models DEN & DEL 6 THRU 120 GALLONS
Commercial Electric Water heaters
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMA TION RELATIVE TO YOUR SAFETY. PLEASE
READ THOROUGHLY BEFORE ATTEMPTING ANY
CONVERSION.
www.aosmithwaterheaters.com
PRINTED IN THE U.S.A. 0905 FORM NO. 195199-001
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FOREWORD
The purpose of this manual is to explain how to change the voltage and wattage of an A. O. Smith commercial electric
water heater by changing the elements. This manual is not intended to explain the rebuilding of electric water heaters in
the field.
Addition of heating elements or subtraction of heating elements in the field is not approved by Underwriters Laboratories,
Inc., and therefore, should not be attempted.
The limitation that “both the heater required and the heater to be converted must be found on the same page” (in this
manual) must be followed. Before attempting any conversion, please read the detailed instructions contained on pages
8, 9, 10 and 1 1.
SAFETY
Be sure to disconnect appliance from electrical supply before working on or near the electrical system of the heater.
Never touch electrical components with wet hands or when standing in water .
REQUIRED ABILITY
CONVERSION OF ANY WATER HEATER LISTED IN THIS MANUAL REQUIRES ABILITY EQUIVALENT
TO THAT OF A LICENSED ELECTRICAL TRADESMAN
CONTENTS
CONVERSION ALLOWED ON P AGE
DEL-6, 1 Element, 120/277 V , 1 Phase,
Two Wire Circuit .................................................... 3
DEL-6, 1 Element, 208/240 V , 1 Phase,
Two Wire Circuit .................................................... 3
DEL Models, 1 Element, 120/277V,
1 Phase, Two W ire Circuit, (Except DEL-6) ........... 4
DEL Models, 1 Element, 208/240/280 V,
1 Phase, Two W ire Circuit, (Except DEL-6) ........... 5
DEN/DEL Models, 2 Elements, 120/277 V,
1 Phase, Non-Simultaneous or Simultaneous
Four Wire Circuit ................................................... 6
DEN/DEL Models, 2 Elements, 208/240/480 V,
1 Phase or 3 Phase, Simultaneous or
Non-Simultaneous, Four Wire Circuit .................... 7
CONVERSION INSTRUCTIONS P AGE
INTRODUCTION.................................................... 8
HEA TER PREP ARA TION ...................................... 8
KW CONVERSION (Element Replacement).......... 8
VOL T AGE CONVERSION ..................................... 8
PHASE CONVERSION ......................................... 8-9
SIMUL T ANEOUS CONVERSION........................... 9
CAUTION .............................................................. 9
FINAL ASSEMBLY ............................................... 10-12
MISCELLANEOUS INFORMA TION ....................... 12
CONVERSION MATERIALS
1. Screw Plug Element Remover: Product Service Kit no. 9004642 or 1-1/2" deep well socket and ratchet.
2. Screwdrivers: Two required, one #2 phillip s and one slotted screwdriver.
3. Conversion kit: Includes conversion instructions, replacement electrical element(s), conversion kit label, caution label.
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DEL-6 WITH 1 ELEMENT, 120/277 VOLT,
1 PHASE, TWO WIRE C-2 CIRCUIT
INSTRUCTIONS
1. Find the voltage and KW of the required heater .
2. On the same line, move to the right until you are in the column of the kit number required.
3. Order the corresponding kit.
See pages 8 thru 1 1 or detailed instructions.
Total Element Kit
Voltage KW Input Wattage Number
1.5 1500 9003826
120 2.0 2000 9003827
2.5 2500 9003828
3.0 3000 9003829
1.5 1500 9003830
277 2.0 2000 9003831
2.5 2500 9003832
3.0 3000 9003833
CHECK ALL W A TER AND ELECTRICAL CONNECTIONS FOR TIGHTNESS
DEL-6 WITH 1 ELEMENT, 208/240/480 VOLT,
1 PHASE, TWO WIRE C-2 CIRCUIT
INSTRUCTIONS:
1. Find the voltage and KW of the required heater.
2. On the same line, move to the right until you are in the column of kit number required.
3. Order to corresponding kit.
See pages 8 thru 11 for detailed conversion instructions.
Total Element Kit
V oltage KW Input Wattage Number
1.5 1500 9003837
208 2.0 2000 9003838
2.5 2500 9003839
3.0 3000 9003840
1.5 1500 9003846
240 2.0 2000 9003847
2.5 2500 9003848
3.0 3000 9003849
480
2.5 2500 9003856
3.0 3000 9003857
CHECK ALL W A TER AND ELECTRICAL CONNECTIONS FOR TIGHTNESS
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DEL MODELS WITH 1 ELEMENT, 120/208/240/277/480 VOLT,
1 PHASE, TWO WIRE C-2 CIRCUIT (EXCEPT DEL-6)
INSTRUCTIONS
1. Find the voltage and KW of the required heater .
2. On the same line, move to the right until you are in the column of kit number required.
3. Order to corresponding kit.
See pages 8 thru 11 for detailed conversion instructions.
Total Element Kit
V oltage KW Input Wattage Number
1.5 1500 9003826
2.0 2000 9003827
120 2.5 2500 9003828
3.0 3000 9003829
1.5 1500 9003830
2.0 2000 9003831
2.5 2500 9003832
277 3.0 3000 9003833
4.0 4000 9003834
4.5 4500 9003835
6.0 6000 9003836
1.5 1500 9003837
2.0 2000 9003838
2.5 2500 9003839
3.0 3000 9003840
208 3.5 3500 9003841
4.0 4000 9003842
4.5 4500 9003843
5.0 5000 9003844
6.0 6000 9003845
1.5 1500 9003846
2.0 2000 9003847
2.5 2500 9003848
3.0 3000 9003849
240 3.5 3500 9003850
4.0 4000 9003851
4.5 4500 9003852
5.0 5000 9003853
5.5 5500 9003854
6.0 6000 9003855
2.5 2500 9003856
3.0 3000 9003857
480 4.0 4000 9003858
4.5 4500 9003859
5.0 5000 9003860
6.0 6000 9003861
CHECK ALL W A TER AND ELECTRICAL CONNECTIONS FOR TIGHTNESS
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