AP Expert VT-110, Руководство пользователя

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Chapter 9: Ventilation and Cooling
Status Select On for the variable output to be used in minimum ventilation.
Cycle Time If the variable output is used in minimum ventilation, correctly set its minimum
ventilation Cycle Time.
Fan Stages: How it Works
The controller has 8 fan stages which operate in a sequence to increase the level of ventilation as the
room temperature increases. Each stage can activate two variable outputs, on/off outputs, and a combi-
nation of timer relays for cooling purposes. A fan stage is activated when the room temperature reaches
its start temperature and is disabled when the room temperature decreases to its stop temperature.
Operation of fan stages
Start temperatures of fan stages are defined with respect to the set point and with respect to each other.
This means that when one of these values is adjusted, all the consecutive values are adjusted by the
same amount. For example, if the set point is increased by 1°F, the start temperature of all fan stages will
be increased by the same amount.
Timer-based relays in fan stages
Fan stages can activate relays that operate following a timer (On and Off Times). This is useful to activate
misting units in timer mode while a specific fan stage is active.
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