Belimo Holding Ag

Darryl Deangelis

Ronald Aeberhard

Daniel Albrecht

Guido Hofstetter

A control unit () for an HVAC system () comprises an economizer (EC), which economizer (EC) is configured to introduce outdoor air (OA) into the HVAC system () for cooling and/or ventilation purposes in a manner controlled by said control unit (), said control unit () comprising a base module () with: a control circuit (), a man machine interface () connected to said control circuit (), and first I/O means for connecting at least one sensor () of said HVAC system to said control circuit () and for delivering at least one control signal from said control circuit () to control the operation of said economizer (EC). Said base module () is configured to optionally receive at least one extension module (), which can be snapped on and electrically connected to said base module () for expanding the functionality of said control unit ().

Control unit for an HVAC system comprising an economizer and method for operating such control unit

In an air conditioning economizer system outdoor air intake is reduced automatically by a control device based on a shut-off control setting for a measured outdoor air quality. A geographical location associated with the air conditioning economizer system is received (S) in the control device. The control device defines automatically (S) the shut-off control setting based on the geographical location. Thus, the air conditioning economizer system is adapted specifically for a geographic location and its climate zone, without the requirement for installing or operating personnel to determine a shut-off control setting for a specific climate zone and/or select a corresponding operating range.

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Longmeadow, MA, United States of America

Darryl Deangelis