A.O. Smith Gold DRE Technical Documents
Commercial Electric Water Heaters
®
GOLD SERIES COMMERCIAL ELECTRIC WATER HEATERS
Designed for use as a recovery heater having its own storage tank. Note: Not recommended
for sanitizing water applications.
FEATURES
Meets the standby loss requirements of the U. S. Department of Energy and current edition
of AHRAE/IESNA 90.1.
GOLD ELEMENTS - DRE models ship with the Goldenrod 24K gold plated elements (see
element availability chart on back). Patented Goldenrod elements provide long life and superior
scaling resistance. Low watt density means lower surface temperature to minimize scale buildup
and more surface to heat water. Goldenrod elements carry a one-year warranty against failure
due to lime scale build-up.
GLASSLINED TANK - Three sizes: 50, 80 and 119 gallon capacity. Tank interior is coated
with glass specially developed by A. O. Smith for water heater use. Tanks rated at 150 psi
(1034 kPa) working pressure (ASME 150 psi). Foam insulation reduces costly heat loss.
MODELS
DRE-52, 80, 120
FUSING - Protects all elements, thermostats, and internal wiring circuits against excess current
fl ow. Meets National Electrical Code requirements that non-ASME tanks must have internal
fusing when current draw exceeds 48 amps. Available as an option on Canadian built heaters.
STANDARD VOLTAGES - 208, 240 and 480V single-phase and three-phase delta. Convertible
from three-phase to single-phase (in fi eld) and vice versa. 277V single-phase also available.
TERMINAL BLOCK - Factory installed. Just bring the service to the heater and connect to block.
CONTROLS - One temperature control (adjustable through a range of 120° to 180°F) and
manual reset high temperature cut-off per element. Thermostat step control may be achieved
by varying settings on individual temperature controls. Located behind hinged control
compartment door for quick, easy access.
OTHER STANDARD FEATURES -
£
Surface mounted thermostats
anode rods for maximum corrosion protection £ Cabinet has bonderized undercoat with baked
enamel fi nish £ Bottom inlet and top outlet openings £ Brass drain valve £ CSA Certified
and ASME rated T&P relief valve £ Single panel control box. £ THREE YEAR LIMITED TANK
WARRANTY - For complete warranty information, consult written warranty.
OPTIONS -
£
UL and cUL listed conversion kits to adjust voltage and kW requirements in the fi eld before
and after installation £ ASME 150 psi tank construction £ International voltages - 220, 380,
400, 415, 575, and 600 volts, three phase available with Y connected elements £ MANIFOLD
KITS - for multiple tank installations. Two heaters -part # 9003429205, three heaters- part #
9003430205 and four heaters- part # 9003431205
£
Simplifi ed circuitry, color coded for ease of service £ Two
ANSI /NSF-5
Revised October 2012
Low Lead Content
Page 1 of 2
AOSCE15300
®
Commercial Electric Water Heaters
RECOVERY RATE IN GALLONS PER HOUR AT TEMPERATURE RISE OF
Standard
kW Input
6 20,478 82
9 30,717 123
12 40,956 164
13.5 46,075 184
15 51,195 205
18 61,434 246
24 81,912 328
27 92,151 369
30 102,390 410
36 122,868 492
40.5 138,226 554
45 153,585 615
54 184,302 738
Figured at 1 kW (3413 BTU) = 4.1 Gallons at 100°F temperature rise.
BTU/
Hour
3O°F
40°F
5O°F
60°F
70°F
8O°F
9O°F
100°F
110°F
120°F
17°C
22°C
28°C
33°C
39°C
45°C
50°C
56°C
62
310
2334916641155351333111627103
4659234974279622335319946174411553714034127311162810726100
123
620
46598372823107026661233
138
523
154
582
184
698
246
930
276
1047
307
1163
369
1396
418
1570
461
1745
554
2094
1117
1256
1398
1675
111
4199234979299
123
465
148
558
197
744
221
938
246
930
295
332
369
443
698
775
930
1241
1396
1551
1861
2094
2326
2791
102
3888833277291
123
105
465
399
164
140
620
532
185
158
609
509
205
176
775
665
246
211
930
798
277
237
1047
897
307
263
1163
997
359
316
1396
1196
55
2074918645169411553814335133
69
62
262
2335520950190461744316140150
68
2586123356211511944714944166
92
82
349
3107427967254622335721553199
123
109
465
4149837290338823107628670266
138
123
523
465
154
137
582
517
184
164
698
620
208
185
785
698
230
205
872
755
277
246
1047
930
61°C
25 9322852178197218
111
101
410
391923408532279299
123
112
465
423
148
134
556
508
166
151
628
634
184
168
698
634
221
201
837
761
130°F
67°C
72°C
102
3889535888332
123
113
465
429
138
128
582
537
154
142
582
537
185
170
696
644
140°F
78°C
66
105
399
119
498
132
498
158
598
142
153
158.1
Element
Wattage
Dimensions
21 3/4
55.2
25 1/2
64.8
29 1/2
75.0
Inlet/
Outlet (NPT)
27
68.6
78.7
88.9
1 1/4
1 1/4
1 1/4
31
35
Full Load Current In Amperes
Single Phase Three Phase
Approx. Ship.
Wt. (Lbs.)
3.2 265 120
3.2 280 127
3.2 390 177
99.9 86.6 43.3
Model
Number
DRE-52
DRE-80
DRE-120
kW
Input
6 DRE-52-6 DRE-80-6 DRE-120-6 3 2,000 28.8 25.0 21.7 12.5 16.7 14.4 7.2
9 DRE-52-9 DRE-80-9 DRE-120-9 3 3,000 43.3 37.5 **32.5 18.8 25.0 21.7 10.8
12 DRE-52-12 DRE-80-12 DRE-120-12 3 4,000 57.7 50.0 43.3 25.0 33.3 28.9 14.4
13.5 DRE-52-13.5 DRE-80-13.5 DRE-120-13.5 3 4,500 64.9 56.3 **48.7 28.1 37.5 32.5 16.2
15 DRE-52-15 DRE-80-15 DRE-120-15 3 5,000 72.1 62.5 **54.2 31.3 41.6 36.1 18.0
18 DRE-52-18 DRE-80-18 DRE-120-18 3* 6,000 86.5 75.0 65.0 37.5 50.0 43.3 21.7
24 DRE-52-24
27 DRE-52-27 DRE-80-27 DRE-120-27 6 4,500 129.8 112.5 **97.5 56.3 74.9 65.0 32.5
30 DRE-52-30 DRE-80-30 DRE-120-30 6 5,000 144.2 125.0 **108.3 62.5 83.3 72.2 36.1
36 DRE-52-36 DRE-80-36 DRE-120-36 6 6,000 173.1 150.0 130.0 75.0
40.5 N/A DRE-80-40.5 DRE-120-40.5 9 4,500 194.7 168.8 **146.2 84.4 112.4 97.4 48.7
45 N/A DRE-80-45 DRE-120-45 9 5,000 216.3 187.5 **162.5 93.8 124.9 108.3 54.1
54 N/A DRE-80-54 DRE-120-54 9 6,000 N/A 225.0 194.9 112.5 149.9 129.9 65.0
*208 volt models may contain three (3) additional elements. ** Elements available in incoloy only.
Model Numbers
Tank Capacity in Gallons
DRE-80-24 DRE-120-24 6 4,000 115.4 100.0 86.6 50.0 66.6 57.7 28.9
Tank
Capacity
gal.
litre
50 189
80 300
119 450
ABC
in. cm in. cm in. cm in. cm Ib kg
55 3/4
60 1/4
62 1/4
Number
Of
Elements
SUGGESTED SPECIFICATION
The heater(s) shall be Gold Series Commercial Electric Model Number ______________ as manufactured by A. O. Smith. Heater(s) shall be rated at ____________
kW,_______volts, ____________ phase, 60 cycle AC, and listed by Underwriters’ Laboratories and approved to the NSF Standard 5 by UL. Tank(s) shall be ________
gallon capacity. Tanks shall be 50, 80 and 119 gallon capacity and shall have 150 psi working pressure and be equipped with extruded high density anode. All internal
surfaces of the heater(s) exposed to water shall be glasslined with an alkaline borosilicate composition that has been fused-t o-steel by firing at a temperature range
of 1400°F to 1600°F. Electric heating elements shall be low watt density Goldenrod 1” screw-in type. Each element shall be controlled by an
individually mounted thermostat and high temperature cut-off switch. All internal circuits shall be fused. The outer jacket shall be of baked enamel finish
and shall be provided with full size control compartment for performance of service and maintenance through hinged front panel and shall enclose the tank
with foam insulation. Electrical junction box with heavy duty terminal block shall be provided. The drain valve shall be located in the front for ease of
servicing. Heater tank shall have a three year limited warranty as outlined in the written warranty. Manufacturer shall supply ASME rated temperature and
pressure relief valve. Fully illustrated instruction manual to be included. Meets standby loss requirements of the U. S. Department of Energy and current edition of ASHRAE/IENSA 90.1..
V084V042V802V084V772V042V8029110805
For Technical Information and Automated Fax Service, call 800-527-1953. A. O. Smith Corporation reserves the right to make prod uct changes or improvements without prior notice.
Revised October 2012
www.hotwater.com
AOSCE15300
Page 2 of 2
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