A.O. Smith 0 User Manual
INCOLOY IMMERSION HEATERS —
AVAILABLE WITH OPTIONAL GOLDENROD ELEMENTS —
All models are available with the Goldenrod 24K gold plated elements (patent pending). Goldenrod Elements provide longlife and five times the scaling resistance of standard incoloy elements. Goldenrod Elements carry a
FUSING — Control and power circuit fusing to meet N.E.C.
PILOT SWITCH AND LIGHT — Provided on front of heater; permits manual starting and stopping of heater by interrupting power to control circuit.
MEETS OR EXCEEDS THE REQUIREMENTS OF ASHRAE
MAGNETIC CONTACTOR(S) — Heavy duty UL rated for 100,000 cycles.
LOW WATER CUTOFF — Probe type electric low water cutoff prevents energizing of elements in the event of low water condition.
120 VOLT CONTROL CIRCUIT — 120 volt control circuit is powered by fused transformer.
IMMERSION THERMOSTAT — Immersion temperature control (one per 60KW) is adjustable to 180°F; high temperature cutoff is manual reset, adjustable type.
OTHER STANDARD FEATURES
• Color coded circuitry for easier servicing• Anode rods for maximum corrosion protection• Standard voltages include 208, 240, 480, 600 volt single or
OPTIONAL DUAL ENERGY SOURCE CAPABILITY —
Provides emergency back up energy source or winter/summer boiler operation. Can be specified with optional water to water or steam to water heat exchangers. Both single and double wall heat exchangers are available. Complete control packages can be factory installed for
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 repair or replace the 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.
Warranty does not apply to product installed outside of the United States of America or its territorial possessions and Canada.
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The heater(s) shall be A.O. Smith
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CEMENT – A special formulation of cement providing excellent corrosion protection. Available on 200 gallon and larger tanks.
EPOXY – A solventless two component epoxy lining applied to a minimum
GOLDENROD ELEMENTS – Available with Optional Goldenrod Elements - All DVE/DHE models are available with the Goldenrod 24K gold plated elements (patent pending). Goldenrod Elements provide
SILICON BRONZE VESSELS – Are available for special applications or very corrosive water conditions. Consult factory for specific sizes.
STAINLESS STEEL VESSELS – Are available for deionized water. Built with stainless steel under rules of Section IV of the ASME Boiler and Pressure Vessel Code for operation on deionized water having a minimum specific resistivity of 10 megohm/cm.
150 OR 160 PSI WORKING PRESSURE – Must be specified at time of order.
OTHER OPTIONAL FEATURES
TEMPERATURE AND PRESSURE RELIEF VALVES – For working pressures other than standard; consult factory.
HORIZONTAL OR VERTICAL – See specifications, most gallon capacities may be obtained in vertical or horizontal construction.
CIRCULATING PUMP PACKAGE – Circulating pump and piping sized to turn over entire storage capacity of tank once each hour. Recommended to optimize available water at temperature in horizontal tanks particularly where low draw conditions are anticipated.
OPTIONAL INTERNATIONAL VOLTAGES – 380 and 415 volts three phase.
11" x 15" MANHOLE – Available as option on tanks 700 gallons or smaller.
COPPER TUBE TANK HEATER – Double wall copper tube tank heaters are designed for heating potable water with both potable or
THERMOSTATIC STEP CONTROL – The simplest form of modulation. Allows elements to be stepped on in groups by specifying additional thermostats (up to one per contactor). It is recommended that number of thermostats not exceed five.
SOLID STATE MODULATING STEP CONTROL – Solid state electronic control device that modulates input to match load through progressive sequencing of steps (up to 20 steps with maximum of one per contactor).
SEQUENCER – Up to 5 stage time delay sequencer provides for stepping of elements in groups or individually (maximum of one step per contactor). Units supplied with this option will have a 120/24 volt control circuit.
TERMINAL BLOCKS – Allows for remote connection to building demand limiter or other functions.
AUTOMATIC RESET HIGH LIMIT – A control that in the event of high temperature, interrupts power,
INDICATING LIGHTS – Denotes heating stage(s) in operation. Up to one light per contactor is available.
OVERRIDE SWITCHES – A simple means of load control allows all or part of unit input to be controlled manually. Up to one switch per contactor is available.
SAFETY DOOR INTERLOCK – Prevents opening of control panel door when heater power supply is on. NOTE: Once door is opened heater may be energized if necessary for service diagnosis.
SHUNT TRIP CIRCUIT BREAKER – A safety device (circuit breaker) which disconnects power to heater in the event of overcurrent, high temperature or low water level, breaker must be manually reset.
CIRCUIT BREAKER – A safety device which disconnects power to the heater in the event of overcurrent.
A. O. Smith Water Products Company, Inc On Line
For Technical information and
Automated fax Service,
A. O. Smith
Water Products Company
A Division of A. O. Smith Corporation
A. O. Smith Corporation reserves the right to make product changes or improvements at any time without notice.
© A. O. Smith Corp., 1999
Printed in U.S.A.
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