User Manual

9 User Manual
Thermostat Lock Code
User Option 5
The Thermostat Lock Code sets a 3-digit code that you may use at any time to lock or unlock the thermostat.
Setting the code in the user options mode does not activate the lock feature (See Locking/Unlocking Thermostat,
page 15). You may choose a 3-digit code with each digit being 0-9.
3
Operating Your Thermostat
Setting the SYSTEM Control Mode
The System Control has 5 modes of operation – AUTO, COOL, OFF, HEAT and EMER. The mode can be selected
by pressing the SYSTEM button to scroll through the different modes.
NOTE: Depending on how your thermostat was
configured, some system modes may not be available.
AUTO The system will cycle between heating and cooling
automatically based on your program set points.
AUTO will be displayed with either HEAT or COOL.
COOL Only your cooling system will operate.
OFF Heating and cooling systems are off.
HEAT Only your heating system will operate
EMER Operates a backup heat source (Emergency Heat)
for heat pump systems only (Model 3220 only).