A.O. Smith DSE-5 THRU DSE-120 warranty Maintenance, Draining, Flushing, Sediment Removal

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Always close the front access door after making a temperature adjustment. Turn on electricity.

DRAINING

The water heater must be drained if it is to be shut down and exposed to freezing temperatures. Maintenance and service procedures may also require draining the heater.

1.Turn off the electrical disconnect switch.

2.Close the supply water inlet valve to heater.

3.Attach hose to outlet opening of drain valve and direct end to drain.

4.Open a nearby hot water faucet and the heater drain valve.

5.If the heater is being drained for extended shutdown, it is suggested the drain valve be left open during this period. The hose may be removed.

•Follow FILLING instructions when restoring hot water service.

MAINTENANCE

GENERAL

Periodically the drain valve should be opened and the water allowed to run until it flows clean. This will help to prevent sediment build-up in the tank bottom.

Periodically check the temperature and pressure relief valve to ensure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.

CAUTION

THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT.

Water heater maintenance includes periodic tank flushing and cleaning, and removal of lime scale from the heating elements.

Component

Operation

Interval

Required

 

 

 

 

 

Flushing

Monthly

-------------

Tank

 

 

 

Sediment

 

 

 

Removal

As needed

-------------

Elements

Lime Scale

As needed

UN•Lime® delimer

 

Removal

 

and element gaskets,

 

 

 

Part No.5109.

Tank flushing should be performed in accordance with the above schedule. Tank sediment removal and element lime scale removal must be performed when needed as determined by periodic inspections. Following are the instructions for performing recommended maintenance.

FLUSHING

The water heater drain valve should be opened once a month to help prevent sediment buildup on the tank bottom.

1.Turn off the electrical disconnect switch.

2.Attach hose to outlet opening of drain valve and direct end to drain.

•Open the drain valve by turning the knob to the

left (counterclockwise). Allow water to flow until it runs clean.

•If water does not flow from opened drain valve, follow instructions for sediment removal.

3.When finished flushing:

•Close heater drain valve and remove hose.

•Turn on electricity.

SEDIMENT REMOVAL

Water borne impurities consist of fine particles of soil and sand which settle out and form a layer of sediment on the bottom of the tank. In time, if not removed, the level of sediment might reach the heating elements and cause their failure.

For convenience, sediment removal and element lime scale removal should be performed at the same time as follows.

LIME SCALE REMOVAL

Lime scale accumulations on the heating elements is a normal condition, common to all immersion type elements. Factors which affect the amount of this formation are:

1.Amount of hot water used. As the volume of water heated increases, more scale results.

2.Water temperature. As the temperature of water is in- creased, more scale is deposited on the elements.

3.Characteristics of water supply. Regardless of water treatment, the elements should be examined regularly.

Lime scale accumulations may cause noises to occur during operation.

It is recommended that a heating element be removed periodically for examination. If it is scaled, all of the elements should be removed and cleaned. If the tank bottom has an accumulation of sediment it should be cleaned.

Lime scale should be removed by dissolving the accumulation in UN•LIME® delimer. UN•LIME is a non-muriatic delimer, available from A.O. Smith Water Products Company, Product Service Division, 5621 W. 115th ST., Alsip, IL. 60803. Do not use muriatic or hydrochloric acid base deliming solutions to remove lime scale from the elements.

1.Turn off electrical disconnect switch.

2.Drain the heater following DRAINING instructions.

3.Open front access door.

4.Disconnect the element wiring. Try not to disturb the wiring unnecessarily and reconnection will be easier.

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Contents Dura-Power Electric Models Recovery Capacity DimensionsForeword ContentsApprovals Getting to Know Your Water Heater Installation General Safety InformationRelief Devices Temperature Limiting ControlHydrogen GAS Flammable ONE or TWO Temperature ONE Heater Piping DiagramONE or TWO Temperature TWO Heater ONE or TWO Temperature Four Heaters ONE or TWO Temperature Three HeatersMedium Temperature ONE Heater Horizontal Storage Tank Medium Temperature ONE Heater Vertical Storage TankMedium Temperature TWO Heaters Horizontal Storage Tank Medium Temperature TWO Heaters Vertical Storage TankMedium Temperature Three Heaters Horizontal Storage Tank Medium Temperature Three Heaters Vertical Storage TankPipe Relief Valve to Open Drain Branch Circuit ElectricalControl Circuit Power CircuitHeater Circuits Wiring Diagrams Amperage TABLE/OVERCURRENT ProtectionSmall Commercial Wire Diagram Phase Contactor Jumper Configuration Phase Connection Phase ConversionsSmall Commercial Wire Diagram Single Phase Start UP Temperature RegulationOperation FillingSediment Removal MaintenanceDraining FlushingNot enough or no hot water ChecklistIf YOU Cannot Identify or Correct the Source of Malfunction Replacement PartsLeakage Checkpoints Model DSE Limited Warranty Replacement Parts

DSE-5 THRU DSE-120 specifications

A.O. Smith is a well-known name in the water heating and treatment industry, recognized for its commitment to innovation and quality. Among its impressive range of products, the DSE-5 through DSE-120 series stands out as a reliable choice for both commercial and industrial water heating applications.

The DSE series is engineered to deliver superior performance and efficiency. These water heaters are designed with advanced technologies that ensure optimal heat transfer and energy conservation. One of the main features of the DSE series is its high efficiency ratings, often reaching up to 90% or higher. This means users can expect significant savings on energy costs while enjoying reliable hot water supply.

A notable characteristic of the DSE series is its robust design. Constructed from high-quality materials, these water heaters are built to withstand challenging operating environments. The series is available in varying capacities, from DSE-5, which accommodates smaller applications, to DSE-120, catering to larger needs. This versatility allows businesses to select the model that best suits their operational requirements.

A.O. Smith has also integrated state-of-the-art control technologies into the DSE series. These heaters feature advanced digital displays that provide real-time monitoring of temperature and pressure, ensuring optimal performance and safety. The intelligent controls enable users to set precise temperature settings, which can be easily adjusted, enhancing user convenience.

Moreover, the DSE series is equipped with multiple safety features, including over-temperature protection, flame failure detection, and build quality that meets or exceeds industry standards. This ensures not only effective operation but also peace of mind for users.

The DSE water heaters are also recognized for their eco-friendly designs. Many models incorporate options for low-emission combustion systems, making them suitable for environmentally-conscious businesses looking to reduce their carbon footprint.

In summary, the A.O. Smith DSE-5 through DSE-120 series embodies reliable, efficient, and innovative water heating solutions. With varying capacities, advanced control technologies, and a commitment to safety and sustainability, these water heaters are ideally suited for diverse commercial and industrial applications. Whether for a small business or a large industrial entity, the DSE series provides a dependable hot water supply while optimizing energy use.
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