Relative Humidity sensors
Carrier Sensors 43
To wire and mount the Duct RH sensor
1 Drill a .75 inch (1.9 cm) diameter hole in the duct where the sensor is to be mounted.
2 Insert the stainless steel probe into the hole until the foam contacts the duct, then attach the RH sensor
using the 2 self-tapping screws provided.
3 Remove the cover.
4 On the probe unit, remove the knockout's inner ring.
5 If you are not using a .5 inch (1.3 cm) NPT conduit fitting, remove the knockout's outer ring. Tap the ring
in 1 or 2 locations with a screwdriver, then remove the ring.
6 Install your conduit connectors or watertight fittings.
7 Wire the unit for power. See Typical power wiring diagrams for Duct RH and Outdoor RH sensors (page
46).
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