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Microprocessor discharge temperature air controller for multi-stage heating and/or cooling apparatus and outdoor air usage controller

  • US 4,347,712 A
  • Filed: 11/03/1980
  • Issued: 09/07/1982
  • Est. Priority Date: 11/03/1980
  • Status: Expired due to Term
First Claim
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1. An improvement in a temperature control apparatus for controlling temperature conditioning apparatus having an outdoor air supply apparatus and a mechanical cooling apparatus for supplying temperature conditioning air to a plurality of zones by a blower, each of the zones having its own zone thermostat and air supply control means, the temperature control apparatus having a discharge air duct temperature sensor connected to control the temperature conditioning apparatus and adapted to respond to the temperature of the air delivered to the zones, and a second sensor adapted to respond to an environmental condition of a representative zone, the improvement comprisingfirst means responsive to the output of said second sensor for controlling the temperature of air delivered to the zones by adjusting the control temperature of said discharge temperature sensor as an environmental condition of said representative zone changes to maintain a maximum use of the mechanical cooling apparatus when said condition of the representative zone is in the highest range and a maximum use of outdoor air when said condition of the representative zone is in the lowest range.

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