Honeywell TH3110B Owner's Manual - Page 7

System switch - controls

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PRO TH3110B Digital Thermostat System switch The SYSTEM switch can be set to control your heating or cooling system, depending on the season. When set to the Off position, the thermostat will not activate the heating or cooling system. Set SYSTEM switch to control the heating or cooling system. 5 CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate cooling system when outdoor temperature is below 50°F (10°C).

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PRO TH3110B Digital Thermostat
5
System switch
The
SYSTEM
switch can be set to
control your heating or cooling
system, depending on the season.
When set to the Off position, the
thermostat will not activate the
heating or cooling system.
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).