A.O. Smith DSE-5 THRU DSE-120 warranty Checklist, Not enough or no hot water

Page 20

5.Remove the bolts from each element.

6.Remove the elements from the openings.

•Use a twisting, pulling action to remove elements scaled beyond size of the tank openings.

•Brush loose scale from elements.

7.Lime scale removal.

•Place limed ends of heating elements into UN•LIME delimer and allow scale to dissolve. Do not permit delimer or water to contact heating element electrical terminals.

Other scale removal:

•Silicates, sulfates and aluminates must be removed by scraping or other mechanical means. Lime scale solvents will not remove these types of scale which are occasionally encountered.

8.Flush cleaned ends of elements with water when deliming or cleaning is completed.

9.Remove sediment and scale from the tank bottom through the access provided by the element opening(s).

•The cold water inlet valve and drain valve may be opened to aid the cleanout process.

10.Clean remaining gasket material from tank and element flanges. DO not reuse original element gaskets.

•The element gaskets should be replaced whenever an element is removed.

11.Put new gaskets on each element and install into tank openings.

•Uniformly tighten element bolts.

12.Attach element wires to connection points from which they were removed.

13.Follow FILLING instruction to restore hot water service.

•Check for water leaks around elements and proper operation when heater is filled.

•Close front access door.

CHECKLIST

Before calling for service, check the following points to see if the cause of trouble can be identified and corrected. Reviewing this checklist may eliminate the need of a service call and quickly restore hot water service. Figure 1 identifies the location of all of the heater components.

BE SURE TO TURN OFF THE ELECTRICITY WHEN CHECKING EQUIPMENT.

Not enough or no hot water.

1.Be certain the electrical disconnect switch serving the water heater is in the ON position.

2.Check the fuses.

•The electrical disconnect switch usually contains fuses.

3.If the water was excessively hot, and is now cold, the high limit switch may have operated.

•To reset, remove the plug from the top cover of the heater and push the reset button.

•Repeated operation of the high temperature cutoff should be investigated by your dealer.

4.The capacity of the heater may have been exceeded by a large demand for hot water.

•Large demands require a recovery period to restore water temperature.

5.Cooler incoming water temperature will lengthen the time required to heat water to the desired temperature.

6.Look for hot water wastage and leakage.

7.Sediment or lime scale may be affecting water heater operation. Refer to page 18 for details.

Water is too hot

1.Refer to TEMPERATURE REGULATION.

Water heater makes sounds

1.Sediment or lime scale accumulations on the elements causes sizzling and hissing noises when the heater is operating.

•The sounds are normal. However, the tank bottom ` and elements should be cleaned. Refer to page 18 for details.

2.Some of the electrical components of the water heater make sounds which are normal.

•Contactors will “click” or snap as the heater starts and stops.

•Contactors often hum.

Water leakage is suspected.

1.Check to see if the heater drain valve is tightly closed

2.If the outlet of the relief valve is leaking it may represent:

•Excessive water temperature.

•Faulty relief valve.

•Excessive water pressure.

•Excessive water pressure is the most common cause of relief valve leakage. It is often caused by a “closed system”. A check valve in the inlet system will not permit the expanded hot water volume to equalize pressure with the main. A relief valve must release this water or the water heater or plumbing system will be damaged.

20

Page 19 Page 21
Image 20
Page 19 Page 21
Contents Dura-Power Electric Models Dimensions Recovery CapacityApprovals ContentsForeword Getting to Know Your Water Heater General Safety Information InstallationHydrogen GAS Flammable Temperature Limiting ControlRelief Devices ONE or TWO Temperature TWO Heater Piping DiagramONE or TWO Temperature ONE Heater ONE or TWO Temperature Three Heaters ONE or TWO Temperature Four HeatersMedium Temperature ONE Heater Vertical Storage Tank Medium Temperature ONE Heater Horizontal Storage TankMedium Temperature TWO Heaters Vertical Storage Tank Medium Temperature TWO Heaters Horizontal Storage TankMedium Temperature Three Heaters Vertical Storage Tank Medium Temperature Three Heaters Horizontal Storage TankPipe Relief Valve to Open Drain Electrical Branch CircuitPower Circuit Heater Circuits Wiring DiagramsAmperage TABLE/OVERCURRENT Protection Control CircuitSmall Commercial Wire Diagram Phase Conversions Phase Contactor Jumper Configuration Phase ConnectionSmall Commercial Wire Diagram Single Phase Temperature Regulation OperationFilling Start UPMaintenance DrainingFlushing Sediment RemovalChecklist Not enough or no hot waterReplacement Parts If YOU Cannot Identify or Correct the Source of MalfunctionLeakage 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.
Top Page Image Contents