Honeywell Programmable Thermostat Owner's Manual page 8

During Programmed Recovery the thermostat increases the control
temperature gradually and turns the equipment on and off several
times to save energy by avoiding "overshooting" the comfort
temperature. You can see the current control temperature anytime
during recovery by pressing the PRESENT SETTING key. On some
models, both the SYSTEM and ENRG SAV lights may be lit at the
same time during recovery.
This "smart" control learns from experience . Each day it checks how
closely it "hit the target" and adjusts the recovery start time accord-
ingly.
It typically takes four to eight days after installation for this
thermostat to adjust to the weather, your life style, home
construction and heating/cooling system. The thermostat calculates
the LEAVE/RETURN recovery separately from the SLEEP/WAKE
recovery.
With this thermostat you can choose whether you want to use
Programmed Recovery or conventional recovery. Use Programmed
Recovery if you want to choose the exact time that the room
reaches your comfort temperature. Use conventional recovery if you
prefer to choose the exact time your furnace or air conditioner
comes on to start recovery.
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