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69-0887—1
Set Fan and System Switches
First set the fan switch.
AUTO: Normal setting for most
homes. A single-speed fan turns
on automatically with the air
conditioner or furnace. A two-speed fan
usually runs on high with the air conditioner
and on low with the furnace.
Exception: If Fan Operation Switch on the back
of the thermostat is set to the E position (see
page 21), the fan operates with furnace only.
ON: The fan runs continuously. Use
for improved air circulation
during special occasions or for
more efficient electronic air cleaning. (In a
heat-only system, the fan runs continuously
only when the fan relay is connected to the
thermostat.)
Then set the system switch.
COOL: The thermostat
controls your air condition-
ing system.
OFF: Both the heating and air
conditioning systems are
off.
HEAT: The thermostat controls
your heating system.
Auto
On
Auto
On
Heat
Cool
Off
Heat
Cool
Off
Heat
Cool
Off
Summary of Contents for T8131A
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