Page 1
®
Commercial Electric Water Heaters
CUSTOM Xi™ SERIES
HEAVY DUTY COMMERCIAL ELECTRIC WATER HEATERS
FEATURES
ADVANCED ELECTRONIC CONTROL
A. O. Smith’s new proprietary electronic water heater control, provides precise + or – 1°F
temperature control, that is ideal for industrial and food service applications where exact
temperatures of hot water are needed.
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 it’s exact location is shown, eliminates any
need for field testing of elements.
Low Water Cut Off – Factory standard on board low water cutoff uses a remote electronic
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.
Economy Mode Operation – Control system automatically lowers the operating set point
by a programmed value during user defined time periods. Seven-day clock may be
programmed for night set back and or weekend shutdown to reduce operating cost
and save energy.
MODELS
DSE 5 – 120
iCOMM™ Compatible – Call 1.888.WATER02 for more information.
POWERED ANODE
The DSE models use a unique combination of a conventional magnesium anode and a
European style power anode. The powered anode is self-adjusting to water conditions,
does not require maintenance unless damaged, 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 convention commercial electric water heaters.
INCOLOY IMMERSION HEATER S – Heavy-duty medium watt density
elements have incoloy sheathing and prewired leads: provides excellent
protection against oxidation and scaling. Input ranges from 3kW to 90kW
available (see accompanying chart).
All models meet or exceed the thermal efficiency and/or standby
HEAVY FOAM INSULATED –
loss requirements of the U. S. Department of Energy and current edition ASHRAE/IESNA 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 – 125 psi working pressure (65 thru 120 gallons), 150 psi
working pressure (5 thru 50 gallons).
THREE YEAR LIMITED WARRANTY – For complete warranty information consult written
warranty.
PG 1 OF 4
Revised June 2013
Revised October 2008
AOSCE15100
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®
Commercial Electric Water Heaters
FEATURES (Continued)
STANDARD VOLTAGES – 208, 240 and 480 volt single and three phase. Single phase 208 and 240 are convertible to 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 – 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
BRASS DRAIN VALVE
HINGED CONTROL COMPARTMENT DOOR
CSA CERTIFIED AND ASME RATED T&P RELIEF VALVE
Revised June 2013
Revised October 2008 PG 2 OF 4
www.hotwater.com
AOSCE15100
Page 3
®
Commercial Electric Water Heaters
Tank Capacity
10 38 6 26 1/4 667 mm 18 3/4 476.25 mm 25 635 mm 5 1/4 133.35 mm 106 48.1
40 151 36 45 3/4 1,162 mm 20 1/2 520.7 mm 26 1/2 673.1 mm 5 3/4 146.05 mm 190 86.2
50 189 90 54 3/4 1,391 mm 20 1/2 520.7 mm 26 1/2 673.1 mm 5 3/4 146.05 mm 221 100.2
Maximum
kW Input
50 1/2
1,283 mm
1,251 mm
1,480 mm
1,607 mm
DSE
267
RECOVERY RATE IN GALLONS PER HOUR *
TEMPERATURE RISE °F
STANDARD
kW INPUT
BTU/HOUR 30° 40° 50° 60° 70° 80° 90° 100° 110° 120° 130° 140°
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 77 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
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STANDARD kW INPUTS
Standard
kW Ratings
3
6
9
12
15
18
24
30
36
45
54
60** 4 15,000 4 4
75** 5 15,000 5 5 3
90** 5 18,000
* 208V models use one additional immersion heater.
** Available on 50 gallon models or larger.
*** Each immersion heater contains three electric elements.
No. of Wattage 208V 240V 480V
1
1
1
1
1
*1
2
2
*2
3
3
3,000
6,000
9,000
12,000
15,000
18,000
12,000
15,000
18,000
15,000
18,000
1
2
3
1
2
3
1
2
208V 240V 277V 480V 208V 240V 480V
14.4
28.8
43.3
57.7
72.1
86.5
115.4
144.2
173.1
216.3
N/A
N/A
N/A
N/A
12.5
25.0
37.5
50.0
62.5
75.0
100.0
125.0
150.0
187.5
225.0
250.0
N/A
N/A
10.8
21.2
32.5
43.3
54.2
65.0
86.6
108.3
130.0
162.5
194.9
216.6
N/A
N/A
6.3
12.5
18.8
25.0
31.3
37.5
50.0
62.5
75.0
93.8
112.5
125
156
188
Designed for use as a recovery heater having its own storage tank or booster for supplying sanitizing rinse water for dishwashing.
Revised June 2013
Revised October 2008 PG 3 OF 4
www.hotwater.com
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8.3
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25.0
33.3
41.6
50.0
66.6
83.3
99.9
124.9
149.9
166.7
208.4
250
esahP eerhTesahP elgniS
7.2
14.4
21.7
28.9
36.1
43.3
57.7
72.2
86.6
108.3
129.9
145
181
217
AOSCE15100
3.6
7.2
10.8
14.4
18.0
21.7
28.9
36.1
43.3
54.1
65.0
72
90
108
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®
Commercial Electric Water Heaters
OPTIONAL EQUIPMENT & CONSTRUCTION
GOLDENROD® ELEMENTS
the patented Goldenrod 24K gold plated elements. Goldenrod
Elements provide long-life and five times the scaling resistance of
standard incoloy elements. Goldenrod Elements carry a three-year
warranty against failure due to scale.
– All DSE models are available with
STAINLESS STEEL TANK – Available for deionized water. Add a
D to the end of the model prefix for use with deionized water. For
example a DSE5 would become a DSED5.
(Please note: Stainless Steel units are deionized water heating
applications only! DSED models are not approved or certified
for domestic potable water heating applications. To maintain
warranty for domestic potable hot water heating applications.
To maintain warranty for domestic potable hot water heating
applications use on the DSE glass-lined models.)
150 OR 160 PSI WORKING PRESSURE – Available when
required. Must be specified at time of order.
HANDHOLE CLEANOUT – 4”x 6” size.
COMBINATION TEMPERATURE/PRESSURE GAUGE – Dial
type combination gauge (shipped loose).
CONTROL OPTIONS
OVERRIDE SWITCHES
or part of unit input to be controlled manually. Up to one override
switch per contactor is available.
– A simple form of load control allows all
MODULATING CONTROL – The first element on is the first
element off. Not available on single element, single contactor
units.
PRESSURE LIMIT SWITCHES – Both high and low pressure limit
switches available.
POWER CIRCUIT FUSING – 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.
MANIFOLD KITS
Two Heaters – 9003429205
Three Heaters – 9003430205
Four Heaters – 9003431205
OPTIONAL INTERNATIONAL VOLTAGES – 380, 415,
575 and 600 volts three-phase available with Y connected
elements.
INDICATING/PILOT LIGHTS – For indicating element operation
and/or switch closure. Up to one indicating light available for each
switch and/or contactor is available.
SUGGESTED SPECIFICATION
The heater shall be a glass-lined Custom Xi™ commercial electric model No. __________________ as manufactured by A. O. Smith
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 approved 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 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 house 120 volt control circuit transformer, transformer fusing, magnetic contactor(s),
element fusing per N.E.C., and commercial grade incoloy sheathed flange mounted elements with prewired terminal leads. Temperature controls include
limiting switch which will require resetting manually in the event the temperature reaches 190°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/IESNA 90.1. Heater shall include a CSA Certified
and ASME Rated T&P relief valve and drain valve.
Water heater should incorporate the iCOMM™ system for remote monitoring, leak detection and fault alert.
For Technical Information and Automated Fax Service, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
. Heater should
be rated
Revised June 2013
Revised October 2008 PG 4 OF 4
www.hotwater.com
AOSCE15100
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