Flowline LC30 Thermo-Flo - Manual (Page 6)

6 of 14 LC900008 Rev A
GETTING STARTED Step Four
The LC30 Series may be used with any Flowline flow switch with an N‐channel (ends in “‐_ _ _ 2”) or relay
(ends in “‐_ _ _ 5”) output. The relay is a single pole, double throw type; the controlled device can be
connected to either the normally open or normally closed side of the relay. A time delay from 0 to 60 seconds
can be set before the relay responds to the sensor input. Typical applications for the LC30 Series are pump
protection, no‐flow indication or chemical injection.
Guide to Controls: Below is a listing and the location of the different components for the controller:
Standard Version (Non‐CE) CE Version (LC30‐10_1‐CE / LC30‐10_1‐E‐CE)
1. Power indicator: This green LED lights when AC power is ON.
2. Relay indicator: This red LED will light whenever the controller energizes the relay, in response to the
proper condition at the sensor input and after the time delay.
3. AC Power terminals: Connection of 120 VAC power to the controller. The setting may be changed to 240
VAC if desired. This requires changing internal jumpers; this is covered in the Installation section of the
manual. Polarity (neutral and hot) does not matter.
4. Relay terminals (NC, C, NO): Connect the device you wish to control (pump, alarm etc.) to these
terminals: supply to the COM terminal, and the device to the NO or NC terminal as required. The switched
device should be a non inductive load of not more than 16 amps; for reactive loads the current must be
derated or protection circuits used. When the red LED is ON and the relay is in the energized state, the NO
terminal will be closed and the NC terminal will be open.
5. Invert switch: This DIP switch reverses the logic of the relay control in response to the sensor(s):
conditions that used to energize the relay will make it turn off and vice versa.
6. Time Delay: After the input(s) change(s) state, this control sets a delay from 0.15 to 60 seconds before the
relay will respond.
7. Input 1A indicator: These amber LED will light immediately whenever the appropriate sensor attached to
the terminals detects no‐flow, and will turn off when it detects flow. This polarity can be reversed by
change of the switches polarity.
8. Input terminals: Connect the wiring from the sensors to these terminals: Note the polarity: (+) is a 24
VDC, 100 mA power supply (to be connected to the red wire of a Flowline sensor), and (‐) is the return
path from the sensor (to be connected to the black wire of a Flowline sensor). (S) is the relay signal input
to be connected to the white wire. The remaining green wire will return to the (‐) terminal. If polarity is
reversed, the sensors will not work.