Q.1.23 November 2014
Page 3
© Copyright 2014 KE2 Therm Solutions, Inc., Washington, Missouri 63090
KE2
Controlled
Environment
Quick Start Guide
A
IMPORTANT Preliminary Steps
Determine the coil sensor location
To determine the most appropriate sensor location, when arriving on
site, put the system into defrost.
The location where frost is last to disappear is where the coil sensor
should be placed. Monitor both the air entering side, as well as the air
exiting side, of the evaporator coil. Don’t be surprised if the last place
for frost to disappear is on the air exiting side. It is usually near the
right or left end of the coil.
It is important to verify all heating elements are working properly.
B
C
Steps to Ensure Proper Coil Sensor Location
More often than not on coils, the location of the sensor is a short
distance from the end, approximately 1 to 1-1/2” away from the right
and left edges of the active coil surface. The ice tends to grow from
these edges towards the center. Therefore, the sensor location is best
situated approximately 1 to 1-1/2” from the outer edges and typically
near the bottom 1/3rd portion of the evaporator. The sensor needs to
be as far away from the defrost heat sources as possible.
This is most easily located by viewing the current frost pattern. The
last place frost disappears during the defrost cycle is the correct sen-
sor location.
Note: Insert plug (Item B from parts list) into coil housing when
mounting sensor wire to prevent damage to the sensor from
sharp edges. Two plugs are provided. One plug should be inserted
into the inner housing to access the coil, and the other into the outer
housing to exit the coil. Installer must puncture plug to insert sensor.
As with any wiring installation, it is appropriate to leave a service
loop. Enough wire should be left to move the sensor to the opposite
end of the evaporator.
D
Make note of the locations you have determined for placement
of the coil sensors.
Typically last spots to defrost
B
Locate sensor approx.
1-1/2” from end, in the
bottom third of coil
Item B from Parts List on page 1
C
