Packaged Terminal Air Conditioners (PTAC) and Packaged Terminal Heat Pumps (PTHP) installed in California and across the country outnumber all other HVAC systems combined. They are self-contained HVAC systems commonly found in hotels, motels, apartments, condos, schools, medical facilities and offices nationwide. Installation of PTAC SAVER represents a cost effective measure to reduce energy consumption by these HVAC industry workhorses.
CWS PTAC-0011 is a moisture proof PCBA with a combination of software, firmware and circuitry designed to optimize efficiency of operation of PTAC/PTHP units through intervening control of PTAC / PTHP system component activity. Subtle influences on system activity result in substantial savings in PTAC operating cost; usually about 10-12%.
PTAC/PTHP Control Panels usually have buttons or dials to set the machine to condition the air in a room to a desired temperature. When the room reaches the temperature set point, the PTAC heat exchanger unit / cooling compressor cycles off. The fan, however, continues to run for about sixty seconds. Studies show that PTAC / PTHP heat exchanger coils also retain energy after the compressor and fan rest. The heater remains hot or the coils remain cold and wet. It is the CWS PTAC SAVER that initiates recovery of this otherwise wasted energy. The device works by extending the fan operation for a variable time period based on its assessment of current session activity. It takes advantage of system component heating/cooling energy that is, otherwise, lost.
In most situations the amount of time the fan continues to operate after the compressor shuts off varies with the amount of time the compressor has spent on and off during a service session as determined by the CWS-PTAC-0011 microprocessor and firmware. The additional fan run time indicates how much cold water is condensed on the evaporative coil and how much left over energy is stored in the heat exchanger when the compressor cycles down.
All things considered, CWS PTAC-0011 recovers and delivers more heating and cooling energy to the conditioned room than is possible with original PTAC/PTHP. This device will improve the efficiency by delivering additional heating or cooling capacity for a reduced amount of additional electric energy (kWh). CWS PTAC-0011 also extends the service life of the equipment through greater efficiency and fewer cycles.