A.O. Smith DEL-6, DEL-10, DEL-15, DEL-20 User Manual
Commercial Electric
Water Heaters
DURA-POWER
™
Designed for use as a recovery heater having its own storage tank. Available in
upright standard models (DEN) and lowboy models (DEL).
GLASSLINED TANK
• Thirteen sizes; 6 thru 119 gallon
capacity. Tank interior is coated with
glass specially designed by A. O. Smith
for water heater use.
CSA CERTIFIED AND ASME RATED
T&P RELIEF VALVE
SIMPLIFIED CIRCUITRY, COLOR
CODED FOR EASE OF SERVICE
ANODE ROD FOR MAXIMUM
ELEMENTS
• Zinc plated copper sheaths for longer
life. Medium watt density means lower
surface temperature to minimize scale
build-up and more surface to heat
water. Element sizes from 1.5 to 6 KW.
Maximum input 12 KW (see chart).
STANDARD VOLTAGES
• 120, 277 single phase and 208, 240
and 480V unbalanced three-phase
delta; easily converted to single-phase at
terminal block (except 208V with 5500
watt elements). Single element heaters,
single-phase only.
TERMINAL BLOCK
• Factory-installed. Just bring the service
to heater and connect to block. Terminal
block not supplied on 120V & 277 volt
models. (No junction box on DEL6-20)
CONTROLS
• Temperature control (adjustable
through a range of 130° to 170°F on
single element and 120° to 181°F on
dual element) and manual reset high
temperature cutoff per element
CORROSION PROTECTION
CABINET HAS BONDERIZED
UNDERCOAT WITH BAKED
ENAMEL FINISH
TOP INLET AND OUTLET OPENINGS
DRAIN VALVE
(EXCLUDES DEL 6-20)
UL APPROVED FIELD CONVERSION
PROGRAM
COMPLIANCE
• Meets the standby loss Requirements
of the U.S. Department of Energy and
current edition of ASHRAE/IES 90.1.
LIMITED WARRANTY OUTLINE
• If the tank should leak any time during
the first three years, under the terms of
the warranty, A. O. Smith will furnish a
replacement heater; installation, labor,
handling and local delivery extra. THIS
OUTLINE IS NOT A WARRANTY. For
complete information consult the written
warranty or A. O. Smith Water Products
Company.
DEN-40
DEL-30
© March 2019 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
Page 1 of 4
AOSCE15400
Commercial Electric
INLET
3/4” (FEMALE)
OUTLET
3/4” (FEMALE)
DEL 30/40/50
DEN 30-120
INLET
3/4” (FEMALE)
OUTLET
3/4” (FEMALE)
HO
*(NO SIDE OUTLET AVAILABLE FOR DEL-6 MODELS)
ALTERNATE OUTLET
Water Heaters
3/4” (FEMALE) NPT
“B”
FRONT VIEW
DEL 6/10/15/20
“C”
“A”
T WATER OUTLET DEL-6
TOP VIEW
DEL 6/10/15/20
OUTLET
3/4” (FEMALE)
NPT
3/4” NPT
RELIEF VALV E
OPENING
ELECTRICAL
CONNECTION
INLET
3/4” (FEMALE)
NPT
ROUGH-IN DIMENSIONS
Model Number
No. of
Elements
DEL-6 1 6 23 15-1/2 394 14-1/4 362 11 279 N/A N/A 35 15.9
DEL-10 1 10 38 18-1/4 464 18 457 12-1/2 318 N/A N/A 54 24.5
DEL-15 1 15 57 26 660 18 457 20-1/2 521 N/A N/A 58 26.3
DEL-20 1 20 76 22-1/4 565 21-3/4 552 15-3/8 391 N/A N/A 73 33.1
* No side outlet available on DEL-6 Model
Tank Capacity A B C D Shipping Weight
US Gals Litres Inches mm Inches mm Inches mm Inches mm lbs. Kg.
NPT
“D”
NPT
NPT
“D”
NPT
2 1/2”
(63.5 mm)
JUNCTION
BOX
3 3/4” (95.25 mm)
TOP VIEW
DEL 30/40/50
“B”
3/4” NPT
RELIEF VALV E
OPENING
BRASS
DRAIN
VALV E
FRONT VIEW
“C”
JUNCTION
BOX
“A”
DRAIN
VALV E
3 3/4” (95.25 mm)
TOP VIEW
DEN 30 - 120
“B”
FRONT VIEW
3/4” NPT
RELIEF VALV E
OPENING
2 1/2”
(63.5 mm)
“A”
ROUGH-IN DIMENSIONS
Tank Capacity A B C D Shipping Weight
Model
Number
No. of
Elements
DEL-30 2 30 114 30-7/8 784 21-3/4 552 24-1/8 613 8 203 100 45.4
DEL-40 2 40 151 32-1/4 819 24 610 25-9/16 649 8 203 125 56.7
DEL-50 2 50 189 32-1/4 819 26-1/2 673 25-1/8 638 8 203 166 75.3
DEN-30 2 30 114 34-1/2 876 20-1/2 521 21 533 8 203 98 44.5
DEN-40 2 40 151 45-1/8 1146 20-1/2 521 N/A N/A 8 203 113 51.3
DEN-52 2 50 189 54-7/8 1394 20-1/2 521 N/A N/A 8 203 131 59.4
DEN-66 2 66 250 60-3/4 1543 21-3/4 552 N/A N/A 8 203 176 79.8
DEN-80 2 80 303 59-3/8 1508 24 610 N/A N/A 8 203 211 95.7
DEN-120 2 119 450 62-7/16 1586 29-3/8 746 N/A N/A 8 203 326 147.9
US Gals Litres Inches mm Inches mm Inches mm Inches mm lbs. Kg.
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AOSCE15400
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