Emerson E2, Installation And Operation Manual

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Sensors and Transducers Mounting
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3.5.7 Product Temperature
Probes
The product temperature probe is designed to be used
alongside food products in a refrigeration case or freezer.
The product probe uses a thermistor type temperature sen-
sor in a sealed, cylindrical container (approximately 16
oz.). A magnet is contained at the bottom the probe’s
enclosure to allow easy attachment to a side or bottom of a
refrigeration case.
3.5.8 Humidity Sensors and
Humidistats
3.5.8.1 Indoor RH Sensor
The indoor relative humidity sensor should be
mounted in a central location within the zone to be mea-
sured, away from doors, windows, vents, heaters, and out-
side walls that could affect temperature readings. The
sensor should be between four and six feet from the floor.
Note that this sensor generates a small amount of heat;
therefore, do not mount temperature sensors directly
above RH sensors.
Mount RH sensor (P/N 203-5751) as follows:
1. With a flat-head screwdriver, push down the
middle tab on the top of the sensor case and
pop the lid off to expose the circuit board.
2. Insert the flat-head screwdriver into the two
slots on either side of the top of the sensor
case and twist to separate the back plate from
the case.
3. Remove the knock-outs from the back plate
before mounting so wires may be threaded
through.
4. Mount the back plate to the wall using the
two open mounting holes on the top and bot-
tom of the plate.
5. Replace the cover on top of the back plate by
lining up the tabs, and snap the lid back into
place.
Figure 3-23
- Indoor RH Mounting Dimensions
3.5.8.2 Outdoor RH Sensors
The outdoor RH sensor (P/N 203-5761)
The outdoor RH sensor (P/N 203-5761) should always
be mounted on the north side of the building if in the
Northern Hemisphere, or on the south side if in the South-
ern Hemisphere. The sensor should be mounted under an
overhang or otherwise out of direct sunlight (if possible).
Mount the RH sensor (P/N 203-5761) as follows:
1. Secure the rear side of the enclosure to the out-
side wall using the two mounting brackets, as
shown in
Figure 3-24 . The tube holding the sen-
sor element should point straight down.
2. If you will be running the sensor cable through
the wall behind the sensor, cut or drill a hole in
the wall through the hole in the enclosure.