Honeywell PRO TH4110B Owner's Manual page 9

PRO TH41 lOB Programmable Thermostat
! ri
The SYSTEM s witch can be set to con-
trol your heating or cooling system,
depending on the season.
• Heat:Thermostat controls only
the heating system.
• Cool: Thermostat controls only
the cooling system.
• Off: Heating and cooling
systems are off.
/
Set SYSTEM switch to control the heating or
cooling system.
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).