Appendix A: Sat Sensor; Supply Air Temperature Sensor Installation; Figure 6: Supply Air Temperature Sensor Installation - AAON MHGRV-X Field Technical Manual

APPENDIX A: SAT SENSOR

Supply Air Temperature Sensor Installation

Mounting the Supply Air Temperature
Sensor
The Supply Air Temperature Sensor should be located in the
ductwork downstream of the unit supply air connection. Locate
the sensor in the center of the widest part of the duct. 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 duct using the supplied sheet metal screws. Be sure the
gasket is compressed to provide an air tight seal. To help prevent
thermal gradients from affecting the sensor, apply insulation on
the outside of the duct, over the sensor.
WARNING: Make sure your Supply Air Temperature
Sensor is 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 6: Supply Air Temperature Sensor Installation

20
Stand-Alone Mode
In Stand-Alone Mode, the SAT Sensor is connected to the
MHGRV-X. If, in Stand-Alone Mode, the MHGRV-X is used in
conjunction with a Stand-Alone MODGAS-X, the SAT sensor
is shared between the two controllers and always attaches to the
MODGAS-X.
See Table 9, page 21 for SAT Options Jumper Settings and see
Figure 3, page 8 for wiring.
Communication Mode
When communicating with AAON unit controllers, the SAT
Sensor will be connected to the AAON unit controller. The
exception would be in retrofit applications with older controllers.
See Table 10, page 21 for SAT Options Jumper Settings and see
Figure 2, page 7 for wiring. See Table 8, page 21 and Appendix
B, page 22 for details about retrofit applications.
Leads are non-polarized. Butt splice leads to 24-gauge wire minimum.
In Stand-Alone and in retrofit applications, connect leads to "SAT" and "GND" on
MHGRV-X controller.
If using a VCCX2 controller, connect leads to "AI3" and "GND" on main controller.
If using a VCM-X, SA, RNE, or VCB-X controller, connect leads to "AI2" and "GND"
on main controller.
MHGRV-X Field Technical Guide