Series 26M Low-Water Cutoff Plug-In Module, 50 K Ohms Direct Sensitivity, 120 VAC Supply Voltage
Series 26M Low-Water Cutoff Plug-In Module is designed for low-water cutoff protection and meets CSD1 requirements for boiler low-water cutoff. Series 26M features powered contacts. If non-powered contacts are required, please contact the factory and request information on Series 26NM.
AUTOMATIC RESET (Reset Switch terminals not wired) When the liquid rises to the electrode on terminal LLCO, the control energizes, changing the state of the load contacts. (LED will be lit) The control remains energized until the liquid level recedes below the electrode on terminal LLCO. The control then de-energizes (LED will not be lit), returning load contacts to the original state. Unless otherwise specified, there is a three-second time delay on decreasing level. The liquid must be below the probe on terminal LLCO for a full three seconds before the control de-energizes.
MANUAL RESET (Normally closed push button installed across reset terminals) When the liquid rises to the electrode on terminal LLCO, the control will remain de-energized until the push button is depressed. Upon Reset Switch activation, the control will energize (LED will be lit), changing the state of the contacts. The control remains energized until the liquid level recedes below the electrode on terminal LLCO. The control then de-energizes (LED will not be lit), returning load contacts to their original state. Unless otherwise specified, there is a three-second time delay on decreasing level. The liquid must be below the probe on terminal LLCO for the full three seconds before the control de-energizes. Operator to wait 5 full seconds after power is applied before pressing reset switch (if manual reset is used).
MANUAL RESET OPTIONAL POWER OUTAGE FEATURE (Normally closed push button across reset terminals) Control will auto-recover from a power loss. With liquid present on LLCO electrode at a power outage event, the control will de-energize and will automatically re-energize upon the return of power with liquid present on the probe at power-up. However, if loss of liquid is sensed on power-up, the control will remain de-energized until liquid again rises to the electrode and the pushbutton is depressed. The control would not attempt to auto-recover from a power outage if no liquid was present on the probe at power loss.
TEST FEATURE Allows LLCO circuit to be tested without the need to drop the water level in the boiler to create a dry probe condition. Holding down the reset button for 3 seconds will allow the LLCO circuit to trip, simulating a dry probe. The controller will return to normal operation once the reset button is pressed a second time.
LED STATUS INDICATOR In normal operation, the LED on the control will either be on or off, depending on the controller state. On-board microprocessors continuously monitor for fault conditions. In the event a fault is detected, the LED will blink a pattern indicating the fault type. If you experience an inoperable control and the LED is blinking, attempt to leave the control in the blinking state and contact the factory for assistance.