The outdoor temperature sensor is an optional device used to provide current outdoor temperature information to the heater for automatic core charge control. The heater responds by automatically storing heat in its brick core according to outdoor temperature. The outdoor temperature sensor can be tested for accuracy by reading resistance across the wires and comparing the reading to the Temperature Sensor Resistance Graph.
NOTE: The outdoor temperature sensor can be installed in one of two ways: direct wired to the system or wired to a Steffes power line carrier transmitting device. If direct wired to the heater, one sensor per heater is required.