A.O. Smith POWER VENT GAS Installation And Operating Manual page 28

Numeric Display
Numeric information such as temperature set-point,
maintenance codes and error codes are displayed using
a large yellow LED display.
Up and Down Buttons
Two buttons (with "Up" and "Down" arrows) are used
for adjusting the data on the display. Other secondary
functions such as turning the Key Lock "Off", are described
in other sections.
Temperature Set-point change
Two buttons (with "Up" and "Down" arrows) are used to
adjust the desired temperature set-point.
When the Temperature Set-point is displayed and the
Key Lock Is "Off", pressing the Up Button will increase
the set-point and pressing the Down button will decrease
the set-point.
NOTE: The Temperature Set-point cannot be adjusted
beyond the limits of the current Mode selected.
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Burner in Operation
When the burners are in operation and fl ame is detected
by the fl ame sensor, the fl ame symbol is illuminated.
Switching Between Units of Measure
Switching between temperature units of measure (°F/°C).
Two yellow LEDs will be used to light up the current unit
mode, °F or °C. To switch units of measure, simultaneously
press the "Mode" button and the "Up" button.
Fault Indication
A red fault LED (lighting a large red exclamation point)
should be present on the display panel.
Maintenance mode
By simultaneously pressing the "Mode" and "down arrow"
buttons for 3 seconds the unit will allow access to the
maintenance mode.
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