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Document No. 129-413
Installation Instructions
October 13, 2004
Instructions
1. Drill a 7/8-inch diameter hole into the duct at the
desired location of the sensor.
2. Decide if the sensor will be mounted directly to
the duct or if the mounting flange will be used.
•
Sensor Mounting Bracket Installation
a. Use the bracket as a template, and drill
two holes with a No. 26 (0.147-inch) drill
bit. See Figure 1(B).
b. Attach the sensor mounting bracket and
gasket to the duct using two No. 8 × 1-
inch sheet metal screws. See
Figure 1(C1).
c. Insert the sensor in the duct through the
bracket and tighten the mounting screw
to set the insertion depth. See
Figure 1(C2).
A
1
2
B
Four holes required
if sensor base is
mounted directly onto
the duct
2.4
(80)
0.83
(21)
Two holes required
if flange is used to
2.4
mount the sensor
(60)
onto the duct
Figure 1. RH/T Duct Sensor Installation.
NOTE:
Figure 2 shows how to connect the conduit or plenum cable to the sensor head.
.
2
3
C
See Figure 2
for conduit or
plenum cable
wiring instructions
3
4
5
•
Direct installation:
a. Remove the sensor cover.
b. Use the base as a template, and drill four
holes with a No. 26 (0.147-inch) drill bit.
See Figure 1(B).
c. Insert the probe through the gasket and
into the hole. Secure the head to the duct
with four No. 8 × 1-inch sheet metal
screws.
3. Attach conduit or plenum wire to the sensor
base. See Figures 1 and 2.
4. If you are using conduit, pull the field wiring
through the conduit and into the sensor base.
5. Connect the field wiring to the sensor terminal
block on the base. See Figures 3 through 7 for
wiring diagrams.
6. Reinstall the sensor cover. See Figure 1(C6).
The installation is now complete.
1
6
2
1
Figure 2. Conduit or Plenum
Cable Wiring Installation.
Page 2 of 3
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