Brochure

29
Heavy-Duty CMC/SU Booster
Electric Dura-Power
™
Models
ELECTRIC WATER HEATERS
The Dura-Power™ commercial electric water heaters are designed to boost
the water temperatures for applications such as commercial dishwashers,
which require very high temperature sanitizing rinse...typically 180°F.
Both 5-gallon countermount CMC models and 20-gallon SU models are
available with inputs up to 54 kW. All models are also available with an
optional stainless steel tank, for use with deionized water.
Incoloy-Sheath Heating
Elements Standard

Industrial-grade Incoloy
sheathed heating elements are
designed for rugged long-
lasting commercial service and
can withstand sheath
temperatures up to 1500°F

Each heating element has
three separate heating loops,
which provides more heating
surface, lower watt density and
maximum recovery efficiency

Pre-wired leads provide
excellent protection against
oxidation and scaling

Input options from 6 kW to
54 kW recoveries from 62 GPH
to 554 GPH at 40°F rise

Deionized models equipped
with stainless steel standard
elements
A. O. Smith Goldenrod
®
Elements Optional

Patent-pending 24K gold-
plated sheath plus medium-
watt density ensures even
longer element life

600% higher resistance to scale
build-up, compared to Incoloy
elements

Three-year warranty against
failure due to lime scale build-up

Not available on deionized
models
Standard Voltages For
Easy Installation

Single-phase and 3-phase

Single-phase 208V and 240V
are field-convertible to 3-phase

CMC models only, 208V and
240V at 24kW and below are
supplied as phase-convertible
units (single- to 3-phase and
vice versa)

277V single-phase also
available (Contact A. O. Smith
for 120V circuit availability)
Immersion Thermostat For
Efficient Control

Close differential, immersion-
type thermostat for superbly
accurate temperature control

Adjustable from 140°F to 185°F

Manual reset, high-
temperature cut-off
Power Circuit Fusing For
System Protection

Safeguards elements and
contactors from short circuits,
overloading and line surges

Required by National Electric
Code and UL when current
draw exceeds 120A
Heavy-Duty Magnetic
Contactors

UL-rated 100,000 cycles
Factory-Wired 120V
Circuit Controls

120V control circuit powered
by fused transformer

Eliminates need for 120V
service connection
Compliance

Meets the standby loss
requirements of the U.S.
Department of Energy and
current edition of
ASHRAE/IESNA90.1
Optional Goldenrod
®
24-carat gold-plated
elements resist lime
scale adhesion and
sheath temperatures
up to 1500ºF.
MODEL GAL. NO. OF INLET/ APPROX.
NO. CAP. IMMERSION OUTLET HT. WIDTH DEPTH SHIP
HEATERS WEIGHT
CMC-6 thru 18 51 3/4 13-3/4 13 21-3/4 80
CMC-20 thru 54 5 2* 3/4 12 18 22-1/2 96
SU-6 thru 18 20 1 3/4 25 22-1/4 23 200
SU-20 thru 54 20 2* 3/4 25 22-1/4 23 200
All dimensions in inches
*CMC-54 and SU-54 have three immersion heaters.
AOSCA80000 R Oct 2011 Com Catalog:108078_ResidentialFul#7A635.qxd 10/28/11 5:51 PM Page 29