White Rodgers 1F85-277 Instrukcja Naprawy Pobierz pdf (Strona 123)

CZ-4

OPERATION AND WIRING

PURGE TIME

The CZ-4 has a built-in Purge Time after each call is satisﬁed and

provides a minimum off time before another call is initiated. The

Purge Time is set at 2.5 minutes after all calls for a particular mode

are satisﬁed or when the Changeover Timer requires a changeover

due to opposing calls.

After all calls are satisﬁed or the changeover timer activates, the

Purge Timer begins and the heating or cooling, whichever was on,

is deactivated. Typically the fan may be running during this time and

the damper(s) to the last zone(s) calling will remain open to purge

the conditioned air only into those zones that were calling for the

conditioning.

DIP Switch 5 can be set ON to keep the Fan running during the Purge

mode in order to prevent the fan cycling off and back on between

modes. In the instance where the Fan staying ON may create a draft,

and the frequency of opposite calls is minimal this switch can be kept

to OFF.

The CLR PRGE button on the top left of the panel can be pushed to

override the Purge mode and speed installation and checkout. This

button is only active when the System LED is AMBER.

Leading Air Sensor

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White Rodgers 1F85-277 Instrukcja Naprawy Strona 123