A.O. Smith 317443-000, 100 Power Vent DV Series 120 Display Settings, Heater Information

Display Settings

Description/Action Display

Select Display Settings from the Main Menu and press the	Display Settings
Operational Button under "SELECT" to enter this menu. This menu
contains adjustable display options for viewing information on the	Temperature Units		°F
LCD screen. Use the Up & Down Buttons to navigate the menu.	Backlight Delay		30s
• Temperature Units - Adjustable user setting that changes
	Contrast		60%
temperature units display to Celsius °C or Fahrenheit °F.
• Backlight Delay - Adjustable user setting that determines how
long the LCD backlight remains illuminated after a key has
been pressed. Available settings are; Always Off, 10, 30 or 60
seconds and Always On.
• Contrast - Adjustable user setting to adjust the LCD screen	CHANGE	BACK	HELP
contrast between text and background.
Note: These settings are adjusted in the same way described
for the Operating Set Point and Differential Adjustment.
Heater Information
Description/Action		Display
Select Heater Information from the Main Menu and press the	Heater Information
Operational Button under "SELECT" to enter this menu. This menu
contains non adjustable operational information.	Elapsed Time	10 day 0 hrs 0 mins
• Elapsed Time - Total accumulated time the control system
(water heater) has been energized.	Burner On Time
• Burner On Time - Total accumulated time the control system		5 hrs 22 mins
has been in the heating operating state; burner run time.	Cycle Count		00000035
• Cycle Count - Total accumulated count of heating cycles.	CCB Version		X.XX
• CCB Version - Software version for central control board.	UIM Version		X.XX
• UIM Version - Software version for user interface module.	CHANGE	BACK	HELP
Note: Historical data is stored in the CCB's memory. If this CCB
is replaced during servicing the historical data on the CCB being
replaced will be lost. The data stored in the new circuit board will
no longer reflect the entire history of the water heater.

The Elapsed Time, Burner On Time and Cycle Count indicate age, usage and wear.

If the Cycle Count per day is high (divide cycle count by days to determine cycles per day) or the cycle duration is short (determine burner on time total minutes, divide burner on time total minutes by cycle count) consider rasing the Differential setting to avoid short cycling and excessive component wear, see Operating Set Point and Differential Adjustment.

This historical data can also be used to assist facilities managers in forecasting planned replacement of equipment to help avoid lengthy and costly hot water supply interruptions.

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