TABLE 2 OPERATING STATES.

 

 

STATE

DESCRIPTION

 

 

Standby

The water heater is not in an active heating cycle. This usually indicates the temperature in the tank has reached

the Operating Set Point and the control system has terminated the heating cycle.

 

 

 

Heating

The control system is in the Heating Mode. At least one bank of heating elements has been energized.

 

 

Alert

The control system has detected/declared an Alert Condition. The controls system will continue heating operation.

However, a Qualified Service Agent should be contacted to check/service the water heater.

 

 

 

 

The control system has detected/declared a Fault Condition. The control system will discontinue heating operation

Fault

and “lock out.” Power to the water heater must be cycled off and on to reset the control system. Note; cycling power

 

will not reset the control system until the condition that caused the fault has been corrected.

 

 

 

TABLE 3 CONTROL SYSTEM MENUS.

 

 

MENUS

DESCRIPTION

Temperatures

Most commonly accessed menu. Operating Set Point, Differential settings, Tank Temperature and Tank Probe

Offset are located in this menu.

 

 

 

Heater Status

Current Operating State/Mode (heating/standby etc) and status (open/closed - on/off - yes/no) of monitored water

heater functions and components are displayed in this menu.

 

 

 

Economy Mode

Seven day 24 hour time clock with temperature set back capability to reduce operating costs during unoccupied

Setup

or reduced demand periods.

 

 

Alarm Output

The control system’s CCB (Central Control Board) features on board SPDT (single pole double throw) relay contacts

for building EMS (Energy Management System) notification of operational conditions such as Fault Conditions and

Setup

heating mode status. This menu features a list of user definable conditions for relay activation.

 

 

 

Display Settings

Temperature units (°F or °C), appearance (brightness contrast) and backlight delay user adjustable settings are

located in this menu.

 

 

 

Heater Information

Elapsed time of operation, total heating cycle time, heating cycle count, heating element bank(s) cycle count and

heating bank on time along with UIM and CCB software revisions can be viewed in this menu.

 

 

 

Current Fault/Alert

Displays any current Alert or Fault messages.

 

 

Fault History

Retains 9 event history of Fault/Alert messages with time stamp. The Fault History is useful when dealing with intermittent

operational problems or when the customer has reset the control system prior to a service agent’s arrival.

 

 

 

Fault Occurrence

Running total of all Fault and Alert Conditions that have occurred are displayed in this menu. Can help determine

potential root cause(s) of related operational problems.

 

 

 

Restore Factory

This control system feature allows the user to restore control system user settings to their factory default settings.

Defaults

Alarm Output Setup and Display Settings menu items ARE NOT changed when factory defaults are restored.

 

 

 

Accessible by pressing the corresponding Operational Button from most menus and screen displays. This menu

Help Menu

provides access to instructions and explanations for user settings, Operating States, Status Icons, manufacturer’s

 

web address, technical support phone number and service agent contact information.

 

 

TEMPERATURES MENU

Operating Set Point

User adjustable setting 90°F to 190°F range; factory default is 120°F. When the water temperature sensed by the control system from the immersion Temperature Probe reaches the Operating Set Point the control system will end the heating cycle. A call for heat will be activated again when the water temperature drops below the Operating Set Point minus the 1st Differential Setting.

Example: Operating Set Point is 120°F, the 1st Differential Setting is 2°F (factory default). A call for heat will be activated when the sensed water temperature drops to 118°F.

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A.O. Smith Dve-52/80/120 Temperatures Menu, Operating States, State Description, Control System Menus, Menus Description

Dve-52/80/120 specifications

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