3-8 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013
3.5.4 Insertion Temperature Probe
3.5.4.1 Location
The 12-inch insertion temperature probe may be used
to monitor temperature in either the supply or return air
ducts of the AHU or RTU.
3.5.4.2 Mounting
The insertion probe may be mounted in any orientation
within the duct as long as the probe is in the air flow of the
duct. The probe housing should be secured using self-tap-
ping screws. A 0.250” diameter hole is required for the
probe. Figure 3-21 shows the installation of the insertion
probe (self-tapping screws are not provided).
Figure 3-21
- 12-Inch Insertion Probe Mounting
3.5.5 Supply and Return Air
Sensors
In addition to the 12-inch insertion temperature probe,
Emerson Retail Solutions uses the same temperature sen-
sor used for outside and inside temperature to monitor
sup-
ply and return air temperature.
When used in this
application, the sensors are supplied without enclosure
covers. The sensors should be mounted directly in the air
stream of the supply or return air duct. The sensors are not
supplied with any mounting hardware for this application.
3.5.6 Refrigeration System
Temperature Probes and Sensors
3.5.6.1 Location
Emerson Retail Solutions supplies several temperature
monitoring devices including bullet sensors, pipe mount
sensors, immersion probes, insertion probes, and sensors
for high temperature applications. Each of these sensors is
generally installed on the system by the equipment manu-
facturer. If a device must be adde
d to the system, refer to
the information supplied with the device and consult the
refrigeration equipment manufacturer. Table 3-1 lists some
typical sensor applications and the sensor or probe most
suited for
that purpose.
Table 3-1
- Sensor Application and Type
Application Sensor Type
Condenser Outlet (Drop Leg) High Temperature
Bullet
Liquid (Manifold) Pipe Mount
Suction Temperature Pipe Mount
Discharge Air Bullet
Ambient Temperature (Out-
side)
Bullet
Condenser Sump Insertion Probe
Defrost Termination Bullet
3.5.6.2 Mounting Bullet and Pipe Mount
Sensors
Bullet or pipe mount sensors mounted on refrigerant
lines should be secured with a Panduit low temperature
cable tie, number PLT2S-M120, or equivalent. For pipe
mount sensors, the curved surface should be placed
against the pipe and the tie should be positioned in the
groove on the top surface of the sensor. A second tie
should be used to secure the lead to the pipe for additional
support.
Sensors located on refrigerant lines should be insulated
to
eliminate the influence of the surrounding air. A self-
adhering insulation that will not absorb moisture is recom-
mended to prevent ice logging at the sensor location.
The sensor should be positioned on the side of the line
as sho
wn in Figure 3-22.
Figure 3-22
- Sensor Orientation
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