A.O. Smith Dura-Power Den & Del Instruction Manual
A 213.0C
Revised August 2002
COMMERCIAL ELECTRIC WATER HEATERS
DEN & DEL MODELS
Designed for use as a recovery heater having its
own storage tank. Available in upright standard
models (DEN) and lowboy models (DEL).
FEATURES
GLASS-LINED TANK - Thirteen sizes; 6 thru 119 gallon
(22 thru 450 liter) capacity. Tank interior is coated with
glass specially developed by A. O. Smith Ceramic
Research for water heater use. Tanks rated 150 psi
(1034 kPa) working pressure; tested at 300 psi (2068
kPa). Foam insulation provides maximum energy
savings by minimizing radiant standby heat loss.
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 on back).
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 6000 watt elements). Single element
heater, 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.
CONTROLS - Temperature control (adjustable through
a range of 110° to 170°F [43-77°C]) and manual reset
high temperature cutoff per element (dual element
models). Factory wired for non-simultaneous operation;
easily converted to simultaneous element operation
(three phase models only).
OPTIONAL
GOLDENROD ELEMENTS - All DEN & DEL models are
available with the Goldenrod
®
24K gold plated elements
(patent pending). Goldenrod
®
elements provide long life
and 6 times the scaling resistance of standard incoloy
elements. Goldenrod
®
elements carry a three-year
warranty against failure due to lime scale build-up.
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.
Meets or exceeds the requirements of ASHRAE 90.1b-1992
Standard for energy efficiencies.
See page C 029.0 for service wiring and fuse selection.
OTHER STANDARD FEATURES
• Simplified circuitry, color coded for ease of service •
Anode rod for maximum corrosion protection • Cabinet
has bonderized undercoat with baked enamel finish •
Top inlet and outlet openings • Drain valve.
DEL MODELS DEN MODEL
ELEMENT AVAILABILITY CHART
Input
120V
208V
240V
277V
480V
1,500
YES
YES
YES
YES
—-
2,000
YES
YES
YES
YES
YES
2,500
YES
YES
YES
YES
YES
3,000
YES
YES
YES
YES
YES
3,500
—-
—-
YES
—-
—-
4,000
—-
YES
YES
YES
YES
4,500
—-
YES
YES
YES
YES
5,000
—-
YES*
YES*
YES*
YES*
5,500
—-
—-
YES*
—-
—-
6,000
—-
YES**
YES
YES
YES
NOTE: DEL-6 not available in above 2.5 KW.
DEL-6 not available in 480V.
* Not available in DEL-10, DEL-15 and DEN-30.
** A6 non-simultaneous circuit only.
®