MACROMATIC LCP1E100

The device contains potentially hazardous voltages; electric shock may cause death or serious injury. Installation must be performed by qualified personnel in accordance with national, state, and local regulations. Disconnect all power sources supplying this device before connecting or disconnecting wiring. Read these instructions before installing or operating this device and retain them for future reference.

Single-Probe Operation:

• Pump Start (Fill): When liquid level falls below the probe, a fixed time delay begins and the LED flashes red. This time delay prevents rapid cycling of the output relay and its load. At the end of the time delay, the output relay energizes and the LED is solid red. The pump turns on to fill the tank. The relay remains energized until the liquid level rises and contacts the probe. The output relay de-energizes, the pump shuts off, and remains de-energized with the LED solid green until the liquid level falls below the probe again.
• Pump Stop (Drain): When the liquid level rises and contacts the probe, a fixed time delay begins and the LED flashes red. This time delay prevents rapid cycling of the output relay and its load. At the end of the time delay, the output relay energizes and the LED is solid red. The pump turns on to empty the tank. The relay remains energized until the liquid level falls below the probe. The output relay de-energizes, the pump shuts off, and remains de-energized with the LED solid green until the liquid level rises and contacts the probe again.

Dual-Probe Operation:

• Pump Start (Fill): When the liquid level falls below the low-level probe, a 1-second time delay begins and the LED flashes red. At the end of the time delay, the output relay energizes and the LED is solid red. The pump turns on to fill the tank. The relay remains energized until the liquid level rises and contacts the high-level probe. The output relay de-energizes, the pump shuts off, and remains de-energized with the LED solid green until the liquid level falls below the low-level probe again.
• Pump Stop (Drain): When the liquid level rises and contacts the high-level probe, a 1-second time delay begins and the LED flashes red. At the end of the delay, the output relay energizes and the LED is solid red. The pump turns on to empty the tank. The relay remains energized until the liquid level falls below the low-level probe. The output relay de-energizes, the pump shuts off, and remains de-energized with the LED solid green until the liquid level rises and contacts the high-level probe again.

If the container is non-conductive or insulated, an additional probe must be installed as a COM connection, kept permanently submerged in the liquid.

Installation & Setup: Mount a suitable 8-pin octal socket (Macromatic 70169-D or custom connector OT08-PC) in an appropriate enclosure. Wire the socket according to the wiring diagram on the side of the liquid level control relay or as shown in the "Operation" section of this page. Ensure the terminal numbers on the socket match those on the wiring diagram (the wiring diagram on the relay is viewed from the bottom of the relay, not from the top of the socket). Use one or two #12-22 solid or stranded copper or copper-clad aluminum conductors with the terminals of the socket listed above; terminal tightening torque should be 12 inch-pounds. Insert the liquid level control relay into the socket, ensuring the key on the center pin is correctly oriented before insertion. If the relay must be removed from the socket, do not excessively rock the relay back and forth, as this may damage the center pin.

Sensitivity Setting: All LCP series products feature an adjustable sensitivity range as indicated on the nameplate and catalog number. Adjust the sensitivity within the product range by rotating the knob on top of the device. This sets the level at which the relay determines whether liquid is present at the probe. Note: Scale markings are for reference only.

Using a Dual-Probe Relay in Single-Probe Applications: A dual-probe liquid level control relay can be used in single-probe applications. Connect a jumper between the COM and high-probe terminals. Connect the single probe to the low-probe terminal and COM to the COM terminal. This applies to all three dual-probe liquid level control relay output configurations.

Troubleshooting: If the device is not functioning properly, verify all connections are correct against the corresponding wiring diagram on the product. If the problem persists, contact Macromatic at 800-238-7474 or email tech-support@macromatic.com for assistance.