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1. (WO2010120519) CONTROL SYSTEM FOR OPERATING CONDENSER FANS

Pub. No.:    WO/2010/120519    International Application No.:    PCT/US2010/029400
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Thu Apr 01 01:59:59 CEST 2010
IPC: F25B 49/02
Applicants: JOHNSON CONTROLS TECHNOLOGY COMPANY
KOPKO, William L.
DE LA CRUZ, Jose Ruel Yalung
FEDERMAN, Israel
Inventors: KOPKO, William L.
DE LA CRUZ, Jose Ruel Yalung
FEDERMAN, Israel
Title: CONTROL SYSTEM FOR OPERATING CONDENSER FANS
Abstract:
Methods and systems for controlling the operation of condenser fans are provided. At most discharge pressures, the operation of the condenser fans may be controlled based on a capacity of the compressor system. To adjust operation of the condenser fans, the speed of the fans and/or the number or operational fans may be adjusted. The control of the condenser fans based on compressor system capacity may be overridden at compressor discharge pressures that rise above a high pressure level and fall below a low pressure level. At the high and low discharge pressures, the fan speed and/or number of operating fans may be adjusted based solely on the discharge pressure rather than on the compressor system capacity.