KE2
Controlled
Environment
Quick Start Guide
Q.1.23 November 2014
Page 12
© Copyright 2014 KE2 Therm Solutions, Inc., Washington, Missouri 63090
Coil Sensor
The coil sensor location is of the utmost importance for the
proper operation of the controller. It is essential that the sen-
sor is in the coldest location on the coil at the end of the defrost
cycle, to ensure a complete defrost. See preliminary steps A-D on
page 3 to determine the coldest location on the coil.
Once you have determined the proper sensor location as described
in preliminary steps A-D on page 3, the sensor can be installed.
Insert the probe into the fins approximately 1/16” deeper than the
stainless shielding of the probe. Pinch the two fins gently together to
secure the sensor in place. This provides the thermal ballast to ensure
a complete defrost every time.
1.5”
Thermistor
Epoxy
.5”
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Installing the Sensor Properly
It is important to note, the most active portion of the sensor is the
first 1/2” of the 1-1/2” long stainless steel probe.
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As a result, it is important to touch two circuit tubes. When inserting
the sensor into the coil, the tip should touch one of the circuit tubes.
This location provides an appropriate location for the sensor.
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Pressure Transducer
The pressure transducer should be installed at the outlet of the
evaporator. It requires a ¼ inch Schrader port for installation. Many
evaporator models have a preexisting service port on their suction
headers. If a service port is not available, one should be added to
the system when the system is pumped down to add the Electric
Expansion Valve.
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