Controlling the Fan Operation
Fan Modes
If backlight is not on continuous, press the screen anywhere to turn on the backlight. Press the OPTIONS tab to access the FAN mode control.
Press FAN button; repeated presses scroll through all the modes, AUTO, ON, and CIRC (circulate).
SAUTO
S | ON | fan is NOT following the schedule and runs continuously |
| until it is changed from the OPTIONS screen. | |
S | CIRC | fan is following schedule and cycles during periods of |
| equipment inactivity. Cycle time is dependent on user settings | |
| FAN CIRCULATE (Page 10). | |
If FAN mode displays AUTO and ON or CIRC was selected during scheduling for the current period, the thermostat will indicate the current fan mode in the information display (FAN ON or FAN CIRC).
In the CIRC mode, the user can cycle the fan for a programmed percentage of active time per hour, during periods of equipment inactivity (i.e., heating or cooling equipment not running). The fan is ON
for 5 minutes at a time. The user may change the percentage of ON time that the fan is on (see FAN CIRCULATE [Page 10]):
Fan Program
The user can program the fan to be ON, AUTO, or CIRC during a program event period. While scheduling the event, if the fan is set to ON, it will remain on during the entire event. If it is set to CIRC, it will circulate during equipment inactivity per user programmable cycles (see FAN CIRCULATE, Page 10). If set to AUTO, the fan will come on with the equipment to serve the heating/cooling demand and go off accordingly.
NOTE − When the OPTIONS screen FAN mode is changed to ON or CIRC, whatever was scheduled is ignored − the fan will either be ON or it will CIRCULATE per the user−programmed intervals (USER SETTINGS − FAN CIRCULATE (Page 10). When FAN − AUTO is selected in the OPTIONS screen, the schedule IS followed.
In the CIRC mode, the user can cycle the fan for a programmed percentage of active time per hour, during periods of equipment inactivity (i.e., heating or cooling equipment not running). The fan is ON for 5 minutes at a time. The user may change the percentage of ON time that the fan is on (see FAN CIRCULATE [Page 10]):
Controlling the Schedule
If backlight is not on continuous, press the screen anywhere to turn on the backlight.
From the HOME screen press SCHED; repeated presses toggle the schedule ON and OFF. If ON, the system follows the program developed by the user (Page 7).
If OFF, the system operates as a non−programmable thermostat user must make changes when desired. The autochangeover feature continues to operate based on the manual user inputs.
The fan mode is displayed on the SCHEDULE screen when program- ming the thermostat and can be changed only during schedule editing (after EDIT is pressed). Fan settings in OPTIONS screen will OVER- RIDE the scheduled fan operation.
506229−01 05/09 | Page 6 |
