Improvements in or relating to heating/cooling systems

摘要

The method involves monitoring power level of a battery or batteries powering a thermostat. A warning signal is generated when the power is below a predetermine value. The thermostat is arranged to deenergise the controller and maintain it deenergised for a prolonged period after the generation of the warning signal. The warning signal starts a timing sequence that causes the thermostat to deenergise the controller at the completion of the timing sequence unless higher power levels are detected.