VAC Power Input Wiring:
Observe the labeling on the LC30.
Note: Polarity does not matter with the AC input terminal.
Step Six
Step Seven
INSTALLATION
APPLICATION EXAMPLES
Relay Input Wiring:
The relay is a single pole, double throw
type rated at 250 Volts AC, 10 Amps, 1/4 Hp. The two terminal NO
and NC (normally open and normally closed) will be used in different
applications. Remember that the "normal" state is when the relay coil
is de-energized and the Red relay LED is Off / de-energized.
Strobe Alert Output
With the Strobe Alert wired NC, it can be used as a high or low level
alarm, depending on the setting for the invert switch. Strobe can also
be wired NO.
Changing from 120 to 240 VAC
1. Remove the two screws from the top of the printed circuit board
(PCB) and gently slide the PCB from the housing. Use caution when
removing the PCB.
2. Located jumpers JWA, JWB and JWC on the PCB.
3. To change to 240 VAC, remove jumpers from JWB and JWC and
place a single jumper across JWA. To change to 120 VAC, remove
jumper JWA and place jumpers across JWB and JWC.
4. Gently return PCB into housing and replace the two screws.
120 VAC
240 VAC
Configuration
Configuration
Low Flow Alarm:
The goal is to indicate when the flow rate falls
below a certain point. If it does, an alarm is supposed to sound, alert-
ing the operator of a low flow condition.
If power is accidentally cut to the controller, the sensor's ability to
notify the operator of a low flow condition could be lost. The system
must alert the operator not only to low flow, but to controller power
loss.
To do this, connect the hot lead of the
alarm to the NC side of the relay ter-
minal of the controller. If power is
lost, the relay will be de-energized,
and the alarm will sound (if there is
still power to the alarm circuit itself).
The alarm circuit should have a non-
interruptible power supply or some
other indicator or backup alarm to
warn of a power failure in the alarm circuit.
In this application, the normal status is when the sensor is in the flow
condition, and the relay will be energized holding the alarm circuit
open. Please note that the flow switch can be wired either normally
closed or normally open (Step 5). When the switch is wired NC, the
input LED will be off and the relay LED will be on. So for this appli-
cation, Invert should be set to the On position. When the switch is
wired NO, the input LED and the relay LED will be on simultaneous-
ly. So for this application, Invert should be set to the Off position.
LED Indication:
Use LED's located above the input terminals to indicate whether the
switch is in a flow or no-flow state. When the switch is wired NC,
Amber indicates no-flow and Off indicates flow. Reversing the polar-
ity (Normally Open), Amber indicates flow and Off indicates no-flow.
NC
NC
NO
NO
Amber
Off
Amber
Off
JWB
JWC
JW
A
JWB
JWC
JW
A
AC
AC
GND
NC
C
NO
R
P
AC
AC
GND
NC
C
NO
R
P
Strobe
HOT
NRTL
GND
AC
AC
GN
NC
C
N
O
AC
AC
GND
NC
C
NO
HOT
NRTL
GND
AC
AC
G
N
N
C
C
N
O
Relay
T
erminals
1
Red
Black
White
Green
(S)
(-)
(+)
1
Red
Black
White
Green
(S)
(-)
(+)
1
Black
Red
White
Green
(S)
(-)
(+)
1
Black
Red
White
Green
(S)
(-)
(+)
