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COMMERCIAL
ELECTRIC WATER HEATERS
CUSTOM Xi™ SERIES
HEAVY DUTY COMMERCIAL ELECTRIC WATER HEATERS
ADVANCED ELECTRONIC CONTROL
• A. O. Smith’s new proprietary electronic water
heater control provides precise + or – 1°
temperature control that is ideal for industrial
and food service applications where exact
temperatures are needed.
• The Operating Set Point is adjustable from
90°F/42°C to 190°F/88°C. The factory setting
is 120°F/49°C.
• Approved for 180°F/82°C sanitizing
applications.
PLAIN ENGLISH TEXT
• Animated icons display detailed operational
and diagnostic information. Fault or Alert
messages appear if an operational issue
occurs.
ELEMENT SENSING
• Each element is constantly monitored and
current on/off state is displayed, any element
failure is reported and its exact location is
shown, eliminates a need for field testing of
elements.
LOW WATER CUT OFF
• Factory standard on board low water cutoff
uses a remote electric immersion type probe
to prevent energizing of the elements in the
event of low water condition and eliminates
accidental dry firing.
SEQUENCING
• Units with multiple element contactors
are sequenced on with one-second delay
between stages. Prevents high amp electrical
loads from hitting the electric system all at
once and provides a smoother operating unit.
Adjustable modulating mode is optional see
options.
NIGHT SETBACK OPERATION
• Control system automatically lowers the
operating set point by a user defined value
during setback periods. Seven-day clock may
be programmed for night set back and or
weekend shutdown to reduce operating cost
and save energy.
BUILDING MANAGEMENT SYSTEM
• BACnet or Modbus compatible with optional
ICC Gateway.
• Call 1.888.WATER02 for more information.
POWERED ANODE
• The DSE models use a unique combination
of a conventional sacrificial anode and an
adaptive powered anode. The powered
anode is self-adjusting to water conditions,
does not require maintenance and provides
longer-lasting tank protection in hard to
reach areas. This multi-anode system provides
superior anodic protection to hidden surfaces
of the tank not protected in conventional
commercial electric water heaters.
INCOLOY IMMERSION HEATERS
• Heavy-duty elements provide excellent
protection against oxidation and scaling.
Input ranges from 3kW to 90kW available
(see accompanying chart). Rugged, industrial
grade, elements.
FOAM INSULATED
• All models meet or exceed the thermal
efficiency and/or standby loss requirements
of the U. S. Department of Energy and
current edition ASHRAE/IES 90.1.
GLASSLINED TANK
• A. O. Smith’s PermaGlas® coating provides
truly superior protection against corrosion
and is permanently bonded to all inner tank
surfaces at 1600°F.
ASME TANK CONSTRUCTION
• 160 psi working pressure
THREE YEAR LIMITED WARRANTY
• For complete warranty information consult
written warranty.
Features and benefits continued on the following page.
Attention: Changes have been made to some models.
Please note that this spec sheet refers specifically to models
manufactured in McBee, SC
DSE-5A thru DSE-120A
(DSE-100A Shown)
© August 2018 | A. O. Smith Corporation. All rights reserved.
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
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AOSCE15100
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FEATURES AND BENEFITS (CONTINUED)
COMMERCIAL
ELECTRIC WATER HEATERS
STANDARD VOLTAGES
• 208, 240 and 480 volt single and three phase. All 208 and 240 volt at 24kW
and below are supplied phase convertible (single to three and vice versa).
277 volt single phase also available. Consult factory for 120 volt power
circuit availability.
TERMINAL BLOCK
• To accept copper or aluminum leads (on units with more than one
contactor).
120 VOLT CONTROL CIRCUIT
• Powered by fused transformer.
MAGNETIC CONTACTORS
• Heavy-duty UL rated for 100,000 cycles.
POWER CIRCUIT FUSING (120 AMP CURRENT DRAW AND
ABOVE)
• Meets National Electric Code and UL requirements that water heaters must
have internal fusing when current draw exceeds 120 amps.
SIMPLIFIED CIRCUITRY, COLOR-CODED FOR EASE OF SERVICE
HINGED CONTROL COMPARTMENT DOOR
CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE
ROUGH-IN DIMENSIONS
Model Number
DSE-5A 5 19 3 22 in 16 in 24 in 4.25 in 82 37.2
DSE-10A 10 38 6 28.13 in 18 in 26 in 5.25 in 116 48.1
DSE-20A 20 76 18 31.75 in 22 in 28 in 5.75 in 145 65.7
DSE-30A 30 114 24 43.25 in 22 in 28 in 5.75 in 218 98.9
DSE-40A 40 151 36 54.75 in 22 in 28 in 5.75 in 245 111.1
DSE-50A 50 189 90 66.19 in 22 in 28 in 5.75 in 291 132.0
DSE-65A 65 246 90 57.25 in 26.5 in 32.5 in 11.38 in 344 156.0
DSE-80A 80 303 90 58.13 in 28 in 35 in 12.5 in 406 184.2
DSE-100A 100 379 90 70.25 in 28 in 35 in 12.5 in 419 190.1
DSE-120A 120 450 90 70.25 in 30.13 in 37 in 12.5 in 453 205.5
* Not available in 208 volt
Tank Capacity
Gallons Litres A B C D lbs. Kg.
Maximum kW
Input
*
Dimensions in Inches (mm) Approx. Shipping Weight
AOSCE15100
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Page 3
COMMERCIAL
ELECTRIC WATER HEATERS
RECOVERY CAPACITIES
GPH recoveries at list temperature rise
Standard
kW Input
3 10,239 41 31 24 20 17 15 13 12 11 10 10 9
6 20,478 82 62 49 41 35 31 27 25 22 21 19 18
9 30,717 123 92 74 62 53 46 41 37 34 31 28 26
12 40,956 164 123 98 82 70 61 55 49 45 41 38 35
15 51,195 205 154 123 102 88 88 68 61 56 51 47 44
18 61,434 246 184 148 123 105 92 82 74 67 62 57 53
24 81,912 328 246 197 164 140 123 109 98 90 82 76 70
30 102,390 410 308 246 205 176 154 137 123 112 103 95 88
36 122,868 492 369 295 246 211 184 164 148 134 123 113 105
45 153,585 615 461 369 307 263 230 205 184 168 154 142 132
54 184,302 738 554 443 359 316 277 246 221 201 185 170 158
60 204,780 819 615 492 410 351 307 273 246 223 205 189 176
75 255,975 1025 768 615 512 439 384 341 307 279 256 236 219
90 307,170 1229 922 738 615 527 461 410 369 335 307 284 263
STANDARD kW INPUTS AND AMPERAGE
Standard kW
Ratings
BTU/
30°F Rise 40°F Rise 50°F Rise 60°F Rise 70°F Rise 80°F Rise 90°F Rise 100°F Rise 110°F Rise 120°F Rise 130°F Rise 140°F Rise
Hour
Immersion
Heaters***
Wattage
No. of 208V 240V 480V
Number of 50A
Contactors
Full Load Current in Amperes
Single Phase Three Phase
208V 240V 277V 480V 208V 240V 480V
3 1 3,000
6 1 6,000 28.8 25 21.2 12.5 16.7 14.4 7.2
9 1 9,000 43.3 37.5 32.5 18.8 25 21.7 10.8
12 1 12,000 57.7 50 43.3 25 33.3 28.9 14.4
15 1 15,000 72.1 62.5 54.2 31.3 41.6 36.1 18
18 *1 18,000
24 2 12,000
30 2 15,000 144.2 125 108.3 62.5 83.3 72.2 36.1
36 *2 18,000
45 3 15,000
54 3 18,000 N/A 225 194.9 112.5 149.9 129.9 65
60 4 15,000 4 4 4 N/A 250 216.6 125 166.7 145 72
75 5 15,000
90 5 18,000 N/A N/A N/A 188 250 217 108
* 208V models use one additional immersion heater.
*** Each immersion heater contains three electric elements.
1
1 1
2
2 2
3
3 3
5 5 5
14.4 12.5 10.8 6.3 8.3 7.2 3.6
86.5 75 65 37.5 50 43.3 21.7
115.4 100 86.6 50 66.6 57.7 28.9
173.1 150 130 75 99.9 86.6 43.3
216.3 187.5 162.5 93.8 124.9 108.3 54.1
N/A N/A N/A 156 208.4 181 90
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AOSCE15100
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OPTIONAL EQUIPMENT & CONSTRUCTION
COMMERCIAL
ELECTRIC WATER HEATERS
HANDHOLE CLEANOUT (NOT AVAILABLE ON 5 & 10 GALLON
MODELS.)
DIAL TYPE COMBINATION TEMPERATURE & PRESSURE GAUGE
(SHIPPED LOOSE)
POWER CIRCUIT FUSING (LESS THAN 120 AMPS)
• Sub-divides internal circuitry with maximum of 60 amp fuses. Supplied as
standard when required by NEC and UL.
ALARM HORN
• Horns may be furnished to warn of any condition in the heater for which
sensors have been specified.
NORTH CAROLINA CODE - FACTORY INSTALLED T&P VALVE
CONTROL OPTIONS
MODULATING CONTROL
• The first element on is the first element off.
• Not available on single element, single contactor units.
OPTIONAL INTERNATIONAL VOLTAGES
• 380, 415, 575 and 600 volts three-phase available with Y connected
elements.
SPECIFICATION
The heater shall be a glass-lined Custom Xi™ commercial electric model No.______ with _____gallons storage, as manufactured by A. O. Smith. Heater should
be rated at ____kW, ____volts, ____phase, 50/60 cycle AC and constructed in accordance with ASME Code, shall bear appropriate symbol and be listed with
the National Board as required. Heater shall be listed with Underwriters’ Laboratories and classified to The National Sanitation Foundation Standard No. 5. All
internal surfaces of the tank shall be glass-lined with an alkaline borosilicate composition that has been fused-to-steel by firing at a temperature of 1600°F. Tank
shall be cathodically protected with a combination of sacrificial and powered anodes. The entire vessel is to be enclosed in a round steel enclosure with baked
enamel finish. Water heater shall have an electronic control with large LCD displaying current water heater status; provide real time element status and sensing,
low water cutoff and economy mode operation. Shall have 120 volt control circuit transformer, transformer fusing, magnetic contactor(s), element fusing per
N.E.C., and commercial grade Incoloy elements. Temperature controls include limiting switch which will require resetting manually in the event the temperature
reaches 202°F. Foam insulation shall meet the thermal efficiency and/or standby loss requirements of the U. S. Department of Energy and current edition of
ASHRAE/IES 90.1. Heater shall include a CSA Certified and ASME Rated T&P relief valve and a drain valve. Water heater units(s) shall be compatible with building
management systems using Modbus or BACnet with optional ICC interface.
For technical information, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
© August 2018 | A. O. Smith Corporation. All rights reserved.
www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015
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AOSCE15100
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