Probe assembled in duct installation kit plastic pipe
Use a 24-mm drill bit to drill a hole to the duct wall for the humidity probe.
Drill holes for the duct installation kit mounting screws around the hole in a square arrangement, 42 mm apart from each other. Use a 3.2-mm drill bit to drill the holes for the mounting
screws (four ST4.2×16-C-Z DIN 7981 screws).