RTHL3550
7 69-2583ES—01
About your new thermostatSelect the system setting
Press the SYSTEM button to select Heat, Cool or Off.
• Heat: Thermostat controls only the heating system.
• Cool: Thermostat controls only the cooling system.
• Off: Heating and cooling systems are off.
• Auto: Thermostat automatically selects heating or
cooling depending on the indoor temperature.
• Em Heat (only for heat pumps with auxiliary heat):
Thermostat controls Emergency and Auxiliary Heat.
Compressor is locked out.
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50 °F (10 °C).
Note: The Auto and Em Heat set-
tings may not appear, depending on
how your themostat was installed.
MCR32592
SystemFan
On Cool
SystemFan
Auto Heat
/
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