A.O. Smith DSE-5 THRU DSE-120 warranty Operation, Filling, Start UP, Temperature Regulation

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OPERATION

GENERAL

Never operate the heating elements without being certain the water heater is filled with water, and a temperature and pressure relief valve is installed in the relief valve opening.

FILLING

1.Turn off the electrical disconnect switch.

2.Close the water heater drain valve by turning knob to right (clockwise).

3.Open a nearby hot water faucet to permit the air in the system to escape.

4.Fully open the cold water inlet valve allowing the heater and piping to be filled.

5.Close the hot water faucet as water starts to flow. The heater is now ready for START UP and TEMPERATURE REGULATION.

START UP

The following checks should be made by the installer when the heater is placed into operation for the first time.

1.Open the hinged access door, check all water and electrical connections for tightness. Also check connections on top and side of heater.

•Repair water leaks and tighten electrical connections as necessary.

2.Depress red button on manual reset high limit switch.

3.Turn on the electrical disconnect switch.

4.Observe the operation of the electrical components during the first heating cycle. Use care as the electrical circuits are energized.

•Thermostat and contactor operation should be checked by (a) manually operating thermostat and

(b)allowing the heater to come up to temperature and shutoff automatically.

•The thermostat operates all contactor coils simultaneously.

5.Close the access door.

TEMPERATURE REGULATION

DANGER

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/ OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON’S AGE AND TIME OF EXPOSURE. THE SLOWER RESPONSE TIME OF DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.

THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET TEMPERATURES.

SETTING THE WATER HEATER TEMPERATURE AT 120°F WILL REDUCE THE RISK OF SCALDS. Some states require settings at specific lower temperatures.

Figure 1 shows the approximate time-to-burn relationship for normal adult skin.

Temperature

Time to Produce 2nd & 3rd

Setting

Degree Burns on Adult Skin

180°F (82°C)

Nearly instantaneous

170°F (77°C)

Nearly instantaneous

160°F (71°C)

About 1/2 second

150°F (65°C)

About 1-1/2 seconds

140°F (60°C)

Less than 5 seconds

130°F (54°C)

About 30 seconds

120°F (49°C)

More than 5 minutes

 

FIGURE 1

Valves for reducing point-of-use temperature by mixing cold and hot water are available. Also available are inexpensive devices that attach to faucets to limit hot water temperatures Contact a licensed plumber or the local plumbing authority.

The thermostat factory setting is 130°F. The dial is adjustable through a range of 95° to 194°.

The thermostat is behind the front access door. TURN OFF THE ELECTRICAL DISCONNECT SWITCH BEFORE OPENING DOOR.

•It is suggested the thermostat be turned to the lowest setting which satisfies the hot water requirements of the system. This helps minimize water scale formations on the heating elements.

•The thermostat contacts close on about 6°F (not adjustable) drop in water temperature.

•Where multiple thermostats are used, they may be all set at the same temperature or 2° to 4°F apart to achieve “step control”. The bottom thermostat is set the hottest and top thermostat the coolest.

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Contents Dura-Power Electric Models Dimensions Recovery CapacityContents ForewordApprovals Getting to Know Your Water Heater General Safety Information InstallationTemperature Limiting Control Relief DevicesHydrogen GAS Flammable Piping Diagram ONE or TWO Temperature ONE HeaterONE or TWO Temperature TWO 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 CircuitAmperage TABLE/OVERCURRENT Protection Power CircuitHeater Circuits Wiring Diagrams Control CircuitSmall Commercial Wire Diagram Phase Conversions Phase Contactor Jumper Configuration Phase ConnectionSmall Commercial Wire Diagram Single Phase Filling Temperature RegulationOperation Start UPFlushing MaintenanceDraining 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.
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