A.O. Smith DVE-150, DHE-200 Operation, Temperature Regulation, General, Start UP

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OPERATION

GENERAL

Refer to the Features and Components section of this manual (pages 6 & 7) for the location of components mentioned in the instructions that follow.

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 on top of the heater.

An electric type low water cutoff is provided on all heaters as standard equipment. The water probe is installed near the top of the tank to monitor the presence of water. The control circuit is opened if the water level is below this point.

The pilot switch (power on/off toggle switch) on the cabinet front permits the heater to be turned on and off without having to operate the electrical disconnect switch.

Optional manual override switches on the cabinet front allow elements to be manually de-energized if full capacity is not needed.

Filling the Water Heater

To fill the water heater with water:

1.Turn off the electrical disconnect switch.

2.Turn off pilot toggle switch.

3.Close the heater drain valve.

4.Open a nearby hot water faucet to allow the air in the system to escape.

5.Fully open the cold water inlet valve, filling the heater and piping.

6.Close the hot water faucet when water starts to flow from the faucet. Leave the cold water inlet valve fully open. The heater is now ready for start up and temperature regulation.

7.Close the cabinet door and perform start up checks listed below before turning on the electricity.

START UP

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

1.Check all factory and field made water and electrical connections for tightness. Also check connections on top of the heater. Repair water leaks and tighten electrical connections as necessary.

2.Turn on the electrical disconnect switch and pilot toggle switch. The pilot toggle switch is located on cabinet.

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

Temperature control and contactor operation should be checked by allowing heater to come up to temperature and shut off automatically.

USE CARE AS THE ELECTRICAL CIRCUITS ARE ENERGIZED.

DRAINING THE WATER HEATER

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

1.Turn off the electrical disconnect switch.

2.Turn off pilot toggle switch.

3.Close the cold water inlet valve to heater.

4.Open a nearby hot water faucet to vent the system.

5.Open drain valve.

6.If the heater is being drained for an extended shutdown, it is suggested the drain valve be left open during this period.

Follow FILLING instructions when restoring hot water service, see

the list above.

TEMPERATURE REGULATION

HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water. Water heated to a temperature which will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can instantly scald and permanently injure you upon contact. Some people are more likely to be permanently injured by hot water than others. These include the elderly, children, the infirm, or physically/developmentally disabled. If anyone using hot water in your home fits into one of these groups or if there is a local code or state law requiring a certain temperature water at the hot water tap, then you must take special precautions. In addition to using the lowest possible temperature setting that satisfies your hot water needs, a means such as a mixing valve, should be used at the hot water taps used by these people or at the water heater. Mixing valves are available from your local plumbing contractor. Follow manufacturer’s

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Contents Installation Operation Service Maintenance Limited Warranty AsmeSafe INSTALLATION, USE, and Service Important DefinitionsGeneral Safety Table of Contents IntroductionDimensions and capacities data Features and Components DHE Required Ability InstallationLocating the NEW Water Heater Insulation Blankets TEMPERATURE-PRESSURE Relief ValveCirculating Pump Branch Circuit Power CircuitElectrical Heater CircuitsElectrical and recoveries data Wiring Diagrams Wiring Diagrams General Temperature RegulationOperation Start UPHigh Temperature Devices MaintenanceTemperature Adjustment Anode Inspection and ReplacementSediment Removal Temperature-Pressure Relief Valve OperationFlushing Water and Lime Scale RemovalTroubleshooting Checklist If YOU Cannot Identify or Correct the Source of MalfunctionWarranty Tank

DVE-150, DHE-200 specifications

A.O. Smith has established itself as a leading brand in the water heating industry, and its DVE-150 and DHE-200 models showcase the company's commitment to efficiency and innovation. Both units are designed to cater to residential and commercial water heating needs, offering a range of features that enhance performance and reliability.

The DVE-150 is a high-efficiency electric water heater that boasts a 150-gallon capacity. It is ideal for larger households or small commercial applications where hot water demand is significant. One of the standout features of the DVE-150 is its advanced heating element technology. This model uses high-density insulation that reduces heat loss, ensuring more effective energy use. The unit operates at a high recovery rate, allowing it to provide consistent hot water quickly, even during peak usage times.

On the other hand, the DHE-200 is a gas water heater, equipped with a 200-gallon capacity. This model is ideal for high-demand environments where large volumes of hot water are required. The DHE-200 incorporates an innovative direct vent system that enhances efficiency and safety by removing combustion gases from the living space. The modulating gas burner further ensures that the unit operates at optimal efficiency, adjusting the heat output based on the demand for hot water.

Both models feature an intuitive digital display that allows users to monitor and adjust their settings easily. Additionally, they come with advanced diagnostic tools that provide real-time feedback on the system's performance, making maintenance easier and more efficient.

Safety is a top concern for A.O. Smith, and both the DVE-150 and DHE-200 are designed with multiple safety features. These include high-temperature limit switches, pressure relief valves, and flame rollout switches, all of which work to protect the unit from potential hazards.

In terms of installation, both models offer flexible options. They are designed to fit in various spaces, accommodating different installation environments. This versatility is essential for both new constructions and retrofitting older systems.

The DVE-150 and DHE-200 are also backed by A.O. Smith's industry-leading warranty, providing customers with peace of mind regarding their investment. Overall, these models embody A.O. Smith's dedication to quality, efficiency, and safety, making them excellent choices for those in need of reliable water heating solutions.
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