Early Start; Compressor Protection - Honeywell Home RTH2410B1019/E1 Operating Manual

Early start

Early start allows the thermostat to "learn" how long your furnace or air conditioner
takes to reach the set temperature. Simply program the desired times and desired
temperatures into the schedule. The thermostat will determine when to activate
heating or cooling so that the desired temperature is attained at the desired time.
Example: If you set the Wake time to 6 a.m. and the temperature to 70 °F (21 °C), the heat
will come on before the set time, so the temperature is 70 °F (21 °C) by the time you wake at
6 a.m.
Built-in compressor protection
Your thermostat has a feature that helps prevent damage to the compressor of your
air conditioning or heat pump system. Because damage can occur if the compressor
is restarted too soon after shutdown, this feature forces the compressor to wait 5
minutes before restarting. During the wait time, the message Cool On or Heat On
flashes on the screen. When the safe wait time has elapsed, the message stops
flashing and the compressor turns on.
RTH2510/RTH2410 Programmable Thermostat
15 69-2420ES—03