Robertshaw RS5110 - Manual (Page 11)

If the wrong password is entered the display will flash NO for 5
seconds then return to normal.
3. Press and when the correct password is displayed.
The buttons will be unlocked.
Once the security has been disabled, a password needs to be recreated
to protect the settings.
Two Stage Systems
A 2nd stage is a second or additional system that will provide extra
heating or cooling. When a 2nd stage is operating the display will show
the number 2 by the heating and cooling icons.
A programmable temperature differential (default value is 2.0 F degrees or
1.0 C degree) and time delay (default value 20 minutes) control the 2nd
stage cycle.
The 2nd stage turns on when:
• The room temperature changes from the setpoint by the sum of the
1st and 2nd stage differential settings.
• The first stage has been on for the specified delay time, but the
heating/cooling demand has not yet been met.
Energy Efficient Recovery™
With Energy Efficient Recovery, the thermostat looks ahead to the next
event and attempts to reach the next setpoint at the exact time of the
event. If you have two stages, the thermostat will use only the first stage
during this period. This is more efficient than waiting until the next event
and then turning on both the first and second stages.
Backlit Display
This thermostat is equipped with a backlight to make viewing the display
easy. Press the button to activate the backlight. The backlight will
turn off after 10 seconds of inactivity. If the thermostat is wired to have
the backlight stay on all the time the night light can be turned on/off in
the settings menu.
Overriding the Schedule
When the thermostat has been programmed, the settings and the
schedule are saved. The thermostat will follow the schedule unless an
override is entered.
Three methods of override are available.
Permanent Override
Press START/STOP SCHEDULE until the word SCHEDULE is not shown
on the display. The setpoint temperature is displayed. The thermostat
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