On all control cables the White lead is digital ground. Connecting the Black lead to the White lead will place the unit into Manual On . You can connect these leads using a dry contact closure, an optoisolator, or a simple switch. The monitor contacts will close when the main load contactor closes. Check the profile sheet included with your sensor for the actual function of your Black, Green, Red, and Orange control leads.
Functions are profile-dependent.
The temperature is below 15 F, it is snowing, and my sensor hasn't triggered. The assumption is that snow at very low temperatures tends to be very dry and should not be a problem. However, this is not always the case. Select the appropriate companion. Again, remember to power down, then power back up if a configuration switch is changed.