| 摘要 |
The control system is suitable for a heating system and comprises a primary 140, secondary 150 and tertiary 160 thermostat, and further comprises a first switch responsive to the primary thermostat, a second switch 180 responsive to the secondary thermostat, and a third switch 190 responsive to the tertiary thermostat, wherein the first, second and third switches are arranged in series with one another. The thermostats may each have respective ranges of operation wherein the ranges of operation of the secondary and tertiary thermostats both fall within the range of operation of the primary thermostat and wherein the range of operation of the secondary thermostat is lower than that of the tertiary thermostat. The system may be used to control operation of a boiler 130 of a central heating or hot water system such that the boiler is actuated continuously when the primary and secondary thermostat call for heat and intermittently when the primary and tertiary thermostat call for heat, the intermittence being provided by a timer 110. The control system improves the efficiency of a heating system that it controls.
|
