8 • Control Link ACC I&O Manual
026-4704 Rev 6
6.1.2. Note About Using RTV
Sealants
Placing the dewpoint sensor in either of these
locations may require a hole to be drilled in the case
to run the wire from the sensor to the Control Link
ACC. Use caution when sealing this hole with RTV
sealants — the sensor element is sensitive to high
concentrations of RTV. Do not let any RTV sealants
touch the sensor element, and keep the sensor element
as far as possible from where the hole is sealed.
6.1.3. Dewpoint Sensor Mounting
Dimensions
The dewpoint sensor’s mounting holes have 2.35”
(5.97 cm) spacing. Choose a location as close to the
case doors as possible, preferably directly over the
doors or (if necessary) on top of the case. Secure the
sensor to the mounting location with the two screws
provided. Note that the enclosure allows clearance for
a nut driver on the screw head.
Figure 6-2
shows the
mounting dimensions.
It may be necessary to cut a 0.25” x 0.25”(6.35 mm x 6.35 mm) notch in the edge of the metal frame behind
the sensor for the wires to pass through.
6.1.4. Dewpoint Sensor Wiring
The dewpoint sensor cable can be 20-24 AWG range. Emerson recommends Belden# 8771 (
P/N 135-8771
)
22AWG cable or equivalent (not supplied). To install or remove wires from the dewpoint sensor connector,
insert a small screwdriver, such as a Phoenix Contact (
P/N 011-6993
) PTSM Screwdriver (not supplied), into
the top rectangular slots on the connector (above the wire terminals) until it stops; insert or remove wires as
shown in
Figure 6-4
. Insert the three wires on the other end of the cable to the matching 3-pin connector of the
low voltage end of Control Link ACC by pressing in the orange tabs above the terminals using the small
screwdriver. Ensure the wire colors match for the Power, Data and Ground terminals on Dewpoint Sensor and
the Control Link ACC.
Figure 6-2
-
Dewpoint Sensor Dimensions
