23
PREHEAT-X Technical Guide
Mounting the Leaving Air Temperature
Sensor
The Leaving Air Temperature (LAT) sensor should be located in
the PREHEAT-X box’s output location.
Locate the sensor in the center of the widest part of the
PREHEAT-X box wall. Use the supplied template and a 5/16
inch drill to make a hole for the sensor.
Install the gasket over the probe and mount securely to the box
wall using the supplied sheet metal screws. Be sure the gasket
is compressed to provide an air tight seal.
For best accuracy, apply insulation on the outside of the box
wall, over the sensor. This will help prevent thermal gradients
from affecting the sensor.
WARNING:
Make sure your Leaving Air Temperature
Sensor(s) are mounted and wired according
to these instructions prior to testing the
unit or else the modulating valve will not
control properly and may damage your
equipment.
Figure 7: Leaving Air Temperature Sensor Installation
Note:
Leads are non-polarized.
Butt splice leads to 24-gauge
wire minimum.
Inside wall of PREHEAT-X box
Drill 5/16” hole for probe
Adhesive backed drill guide mounting template
Gasket
Mounting Plate
1/4” hex head sheet metal screws
Thread
Together
5-1/2” or 11-1/2”
depending on model
number
3/4”
4.0”
Note:
Connect leads to “AIN1 and/or “AIN2”
and “GND” on the PREHEAT-X.
APPENDIX A: LAT SENSOR
Installation
