Use and Care Manual

38 of 52

A Watts Water Technologies Company

Fan Operation

Section E

The fan operates together with the air heating or cooling systems. 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.

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 Vent Mode setting in the Setup 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 Post Purge

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The fan relay includes a post purge feature that operates the fan after the heating or

cooling system has shut off. When a duct temperature sensor is installed the length

of post purge is based on the air duct temperature and the Heatpurge or Coolpurge

temperature settings. When there is no duct temperature sensor installed, the length

of post purge is based upon the Heatpurge and Coolpurge time settings.