Honeywell CT3650 - Manual (Page 18)

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❑ Press during the spring to set time forward one hour. DST is displayed when operating on daylight savings
time.
NOTE: Pressing the Daylight Time key more than once in a five minute period scrolls you through various time
option. For example, one hour earlier or later, with or without DST. Pressing Daylight Time six times in a five
minute period returns you to your original setting.
STEP 11. SET THE FAN AND SYSTEM KEY
Set the Fan Key
❑ Fan On: The fan runs continuously. Use for improved air circulation or more efficient central air cleaning. (In a heat
only system, the fan runs continuously only if the fan relay is connected to the G thermostat terminal).
❑ Press until display shows On.
❑ Fan Auto: Normal setting for most homes. The equipment controls the fan operation.
❑ Press until display shows Auto.
NOTE: If you set the fan to On during normal operation, the fan reverts to the programmed fan setting when the
next program period begins.
Set the System Key
❑ Heat: The thermostat controls your heating system.
❑ Press until display shows Heat.
❑ Off: Both the heating and air conditioning systems are off.
❑ Press until the display shows Off.
❑ Cool: The thermostat controls your air conditioning system.
❑ Press until the display shows Cool.
Daylight
Time
Fan
Fan
System
System
System