Flowline LC30 Thermo-Flo - Manual (Page 9)

Rev A LC900008 9 of 14
INSTALLATION Step Six
Mounting on a Sensor: The following procedure should be used when mounting the controller directly on a
flow sensor. All power to the system must be off before installing the junction box.
1. Prepare the sensor: The following instructions assume the sensor is already mounted in a position on
its fitting (as described in the sensor manual). Note that because the insulation jacket of the sensor is
less flexible than most (to ensure chemical compatibility), it is important that you follow the
instructions exactly.
a. Cut the wire 4‐1/4” from the top of the sensor.
b. Using a 10 gauge wire stripper, strip the white outer layer of insulation from the last 1‐1/4” of
the sensor wire. Trim off and discard the exposed foil shield flush with the insulation jacket. In
long cable runs, do not cut off the drain wire.
c. Using a 20 gauge wire stripper, strip the last ¼” of insulation from the signal wires.
Important: Do not strip more than 0.2” (5mm) of insulation from any wire that will be connected to the
terminal strip. Longer insulated wire may contact the terminal strip panel, causing a short circuit
leading to a system failure.
2. Position the controller on the sensor: To make the mounting and wiring easier,
you must first remove the printer circuit board (PCB) from the controller.
a. Unscrew the lid of the controller.
b. Remove the two screws holding the PCB to the controller.
c. Gently tip the controller to slide out the PCB and place it aside.
d. Thread the pre‐trimmed sensor wires through the ¾” NPT entrance to the
junction box, and place the controller in position over the sensor.
e. Being careful not to cross the threads, screw the controller on the sensor.
Stop when the cap of the sensor becomes flush with the bottom wall of the
controller, or when the ½” power conduit entrance is in the desired
location.
3. Connect the sensor input wires:
a. Route the sensor‐wire so it stays as close to the housing as possible, but do
not bend the wire sharply at the cap of the sensor. (if the installation
allows, you may rotate the controller and/or the sensor until the wire
outlet of the sensor is in the best position.)
b. Position the PCB in the housing aligned with the two channels designed to
hold it. Do not insert the panel all the way into the housing, but let it rest
on the top of the housing to facilitate the wiring.
c. Using a small screwdriver, loosen the terminal screws. Insert the sensor
wires into the hole on the sensor input terminal, and tighten the terminal
screws.
d. Once completed seat the PCB back into the channels and restore only one
screw to hold the PCB in place.