A.O. Smith Dura-Power DRE - 120 Instruction Manual

A 211.0C

Revised June 2001

Meets or exceeds the requirements of ASHRAE 90.1b-

1992 Standard for energy efficiencies.

Designed for use as a recovery heater having its own

storage tank.  Note: Not recommended for sanitizing

water application.

FEATURES

GLASS-LINED TANK - Three sizes;  52, 80 and 119 gallon

(189, 300, 450 Liter) capacity. Tank interior is coated with

glass specially developed by A.O. Smith Ceramic Research

for water heater use. Tanks rated at 150 psi (1034 kPa)

working pressure (ASME 160 psi [1100 kPa]).  Foam

insulation reduces costly heat loss, and is vermin proof.

ELEMENTS - Incoloy sheathing for longer life.  Low watt

density; means lower surface temperature to minimize scale

buildup and more surface to heat water. Element sizes from

3 to 6 Kw. Use 3, 6 or 9 elements standard; total of 6 to 54

Kw input (see chart on back).

STANDARD VOLTAGES - 208, 240 and 480V single-phase

and three-phase delta; 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 (49° to 82°C) and manual reset high

temperature cutoff 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

•  Simplified circuitry, color coded for ease of service  •  Two

anode rods for maximum corrosion protection  •  Cabinet has

bonderized undercoat with baked enamel finish •  Bottom

inlet and top outlet openings  •  Brass drain valve  •  C.G.A./

ASME temperature and pressure relief valve  •  Single panel

control box.

OPTIONAL

FUSING - Protects all elements, thermostats, and internal

wiring circuits against excess current flow.  Meets Canadian

Electric Code requirements.

Manifold kits with gate valves - available for multiple

installation.

ASME 160 psi tank construction.

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.

COMMERCIAL ELECTRIC

WATER HEATERS

DRE-52, 80, 120

GOLDENROD ELEMENTS - All DRE 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 scale.

ASME

(OPTIONAL)