Step 12. Set The Fan And System Switches - Honeywell CT3600 Owner's Manual

Usage Key
Press once to display the hours and minutes that the heating or cooling system has been operating for the
Usage
current day.
Press a second time to display the system operating time for the previous day (midnight to midnight).
Usage
Press a third time to display the system operating time since the last time the usage function was cleared.
Usage
NOTE: Press
Usage

STEP 12. SET THE FAN AND SYSTEM SWITCHES

First set the fan switch.
Then set the system
switch.
for three seconds to clear the usage function.
Fan On: The fan runs continuously. Use for improved air
circulation or for more efficient central air cleaning. (In a
heat-only system, fan runs continuously only if fan relay is
connected to the G thermostat terminal).
Fan Auto: Normal setting for most homes. The equipment
controls the fan operation.
Heat: The thermostat controls your heating system.
Off: Both the heating and air conditioning systems are off.
Cool: The thermostat controls your air conditioning system.
19
On Auto
Fan
On Auto
Fan
Heat Off
System
Heat Off
System
Heat Off
System
69-1642
Cool
Cool
Cool