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© 2010
D 540 - 08/10
The fan relay includes a post purge feature. After the heating is shut off, the fan
continues to operate for 30 seconds. After the cooling is shut off, the fan continues
to operate for 10 seconds.
The user can also select to operate the fan manually by pressing the Fan button.
This allows the user to choose between Auto and On. “Auto” allows the fan to
operate together with heating or cooling but normally the fan is off. “On” forces the
fan to operate continuously.
The fan button is inactive when the Fan Mode is 0 and Ventilation is set to Off.
Ventilation Fan
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In order to provide ventilation to the building, the fan can also operate for additional
time beyond what is required for the heating and cooling systems. Ventilation allows
the user to select the fan to operate for a minimum percentage out of each hour.
Options are 10 to 90%, in 10% (6 minutes per hour) increments, as well as Auto and
On. This is available when the Ventilation setting in the Adjust menu is set to On.
Once Ventilation is set to On, the Fan minimum run time percentage during the
and events can be set so that the fan can operate on a schedule and /or together
with scenes.
Fan Operation
Section C
Fan Mode
The fan operates with...
0
Not With Heating Nor Cooling (Only with fan button)
1
Cooling Only
2
Heating and Cooling
3
Heating Only
The thermostat normally operates the fan together with the heating and cooling
systems. This is determined by the Fan Mode setting in the Adjust menu.
