sorry to bother ye guys, just wondering i want to set my sensor for 25 c , every time its reach 25c i want my fan to turn on, how will i connect the wire??
power supply + to COM and NC to fan? 
Hi,
Have you checked the engineering note from the Velleman site.
There’s a lot great information in there.
You can download it from the link below.
http://www.vellemanprojects.eu/downloads/0/information/engineering%20note_uk.pdf