10 • Control Link ACC I&O Manual 026-4704 Rev 6
6.1.5. Dewpoint Sensor Storage
Prior to installation, dewpoint sensors should be
stored separately from the cables. Do not store cables
and sensors together for a long period of time in a
closed box or bag. The sensor should be separated
from the cables when a shipment is received and
stored apart, preferably exposed to room air. The
sensors can become contaminated by outgassing from
the cable insulation if kept in a closed up box or bag
with the cable. Contamination can be reversed with
exposure to room air over a period of weeks or in a
temperature/humidity chamber over a period of three
days.
6.2. The Door Frame
Temperature Sensor
6.2.1. Placement
The door frame temperature sensor should be
placed in an area where it can measure the
temperature of the door frame in the location on the
door frame that stays the coldest. The coldest spot on
a door frame is usually the bottom horizontal section
of the stationary frame, under the center door (for
cases with even-numbered doors), or near the center
mullion (for cases with odd-numbered doors). Cooler
doors may also be coldest at the top center of the
frame. Figure 6-1 on page 7 shows an example of
placement in a case with even-numbered doors — the
sensor is placed under the door just to the left of the
center mullion where the Control Link ACC is
installed. Do not mount the sensor outside the case
mullion - mount the sensor inside the case mullion.
Mount the case door frame temperature sensor
along the door frame inside the frame. Secure the
sensor in place by screwing it to the door frame using
the mounting hole.
The sensor is supplied with a 16-foot (4.88-meter)
cable. Connect the sensor into the 2-pin connector
(labeled THERM) at the bottom (closest to the
LEDs), low-voltage end of the Control Link ACC.
NOTE: If replacing the dewpoint sensor,
replace the entire assembly (keep the existing
cable).
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