Thermistor, Immersion
Installation and Operation
#NSA-A/CP-I-2.5-4X, NSA-A/CP-I-4-4X, NSA-A/CP-I-6-4X, NSA-HH/CP-I-2.5-PB-C, NSA-HH/CP-I-4-PB-C
NSA-HH/CP-I-6-PB-C
– 11/15/2019
Specifications subject to change without notice.
Catalog No. 11-808-785-01
Page
2
of
5
Dimensional Drawing
PLASTIC BOX (-PB)
NEMA -4X (-4X)
Figure 1
Installation
Carrier’s standard Immersion sensors are made to install into a ½” NPT female thread. Typically a Threadolet or Tee is
installed into the pipe, but a hole can also be drilled and tapped.
Figure 2
The pipe/system will need to be drained, unless a Hot Tap is being used. The recommend drill size is 23/32 in. (18 mm).
Drill the hole, and tap the hole with ½”-14NPT. Always use proper thread sealants on tapered pipe threads of the
thermowell. Screw the thermowell into the Threadolet, Tee, or tapped hole, using a wrench to tighten it firmly. Refill the
system and check for leaks. Best practice is to apply thermal grease to the end of the probe, but not required. Insert and
push the sensor probe into the thermowell. Turn the sensor probe assembly clockwise to tighten down completely. Refer
to the
Wiring Instructions
to make necessary connections.
