Enhanced economizer controller

Details Enhanced economizer controller Enhanced economizer controller

1999-01-22

2000-12-19

McDermott, Corrine

Automatic temperature and humidity regulation

Ventilator type

Electrically actuated

165249, 165251, 454229, 454256, F24F 700

Patent

active

061617644

ABSTRACT:
An enhanced controller for an air conditioning system incorporating mechanical cooling equipment and an economizer, the enhanced controller including circuits for producing signals indicative of commanded changes in temperature of air admitted into the air conditioned space and of a non-temperature parameter, such as carbon dioxide concentration, of air within the space. The signals are supplied to a logic circuit which produces a ventilation damper control signal based on which of the temperature and non-temperature parameters requires greater change. Freeze protection, and maximum and minimum damper position circuits override the basic damper control signal to avoid excessively low space temperatures and to provide air exchange limits.

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