System Switch - Honeywell PRO TH3000 Series Owner's Manual

PRO TH3110D / TH3210D
The SYSTEM switch can be set to control
your heating or cooling system, depending
on the season.
Coop Cooling system control.
• Off: All systems are off.
• Heat: Heating system control.
• IEm Heat" Emergency & Auxiliary Heat
control. Compressor is locked out.
(Select models only.)
Set SYSTEMswitch to control the
heating or cooling system.
CAUTION: EQUIPMENT DAMAGE HAZARD,
Do not operate cooling system when outdoor
temperature is below 50°F (10°C).