Frost Protection (Air and Pipe Thermostats
A pipe thermostat is a device set to detect low air temperature and switch on protection to avoid frost damage. It is usually arranged to over-ride all other controls.
Where both air and pipe thermostats are used, the electrical contacts should be wired in series from a permanent live supply that is not switched by timeswitch/programmer or thermostats. i.e. protection needs to be available 24 hours a day. Note that some boilers already include their own frost protection but it should be checked to confirm that the dwelling and system is still adequately protected.
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