901-0000-296
December, 2020 - Rev. D
installation instructions
LCP Series
Liquid Level Control Relays
Operation—Single Probe
Pump Up (Fill)
: When the liquid level falls below the probe, a fixed time delay begins & the LED flashes
Red. This time delay prevents rapid cycling of the output relay & its load. At the end of the time delay, the
output relay energizes & the LED is Red ON. The pump is ON to fill the tank. The relay remains ener
-
gized until the liquid level rises & touches the probe. The output relay de-energizes, turning off the pump,
and remains de-energized & the LED is Green ON until the liquid level falls below the probe.
Pump Down (Drain)
: When the liquid level rises & touches the probe, a fixed time delay begins & the
LED flashes Red. This time delay prevents rapid cycling of the output relay & its load. At the end of the
time delay, the output relay energizes & the LED is Red ON. The pump is ON to drain the tank. The relay
remains energized until the liquid level falls below the probe level. The output relay de-energizes, turning
off the pump, and remains de-energized & the LED is Green ON until the liquid level rises & touches the
probe.
Operation—Dual Probe
Pump Up (Fill):
When the liquid level falls below the low level probe, a 1 second time delay begins & the
LED flashes Red. At the end of the time delay, the output relay energizes & the LED is Red ON. The
pump is ON to fill the tank. The relay remains energized until the liquid level rises & touches the high
level probe. The output relay de-energizes, turning off the pump, and remains de-energized & the LED is
Green ON until the liquid level again falls below the low level probe.
Pump Down (Drain):
When the liquid level rises & touches the high level probe, a 1 second time delay
begins & the LED flashes Red. At the end of the delay, the output relay energizes & the LED is Red ON.
The pump is ON to drain the tank. The relay remains energized until the liquid level falls below the low
level probe. The output relay de-energizes, turning off the pump, and remains de-energized & the LED is
Green ON until the liquid level rises & touches the high level probe.
If the container is non-conductive or insulated, an additional probe must be
installed as the COM connection where it will always be submerged.
If the container is non-conductive or insulated, an additional probe must be
installed as the COM connection where it will always be submerged.
Potentially hazardous voltages are present. Electrical shock can cause death or serious injury.
Installation should be done by qualified personnel following all National, State & Local Codes.
BE SURE TO REMOVE ALL POWER SUPPLYING THIS EQUIPMENT BEFORE CONNECTING OR DISCONNECTING WIRING.
READ INSTRUCTIONS BEFORE INSTALLING OR OPERATING THIS DEVICE. KEEP FOR FUTURE REFERENCE.
