Auto-Zone Control Systems Auto-Zone Basic Systems Installation & Operation (Version 02C) - Manual (Page 54)

Section 2 Auto-Zone Basic
2-24 Installation and Wiring
Return Air Temperature Sensor
The return air temperature sensor should be located upstream of where the Bypass con-
nects to the return air duct so that the supply air does not affect the reading of the return
air sensor. Avoid locations which will be exposed to extreme outside temperatures. Lo-
cate the sensor in the center of the widest part of the duct. Use the supplied template and
a 5/16" drill to make a hole for the sensor. Install the gasket over the probe and mount
securely to the duct using the supplied sheet metal screws. Be sure the gasket is com-
pressed to provide an airtight seal. For best accuracy, apply insulation on the outside of
the duct over the sensor. This will help prevent thermal gradients from affecting the sen-
sor.
Caution: Do not mount the return air sensor in the mixed air section. This will
cause an error in the reading.