TCF Series-F

May not be exact product – for reference only.


Lead Time: 

7 Days

function configuration

Combination Single Channel Seal Leak and Over Temperature, Automatic and Manual Reset (For Xylem/Flygt pumps using CLS or FLS sensor (MINI-CAS))

control voltage

120V AC


(2)7A SPDT

sensitivity range


relay type

Seal Leakage and Over Temperature


Flange for Door Mounting


Description of Function

Two wires from the relay are connected to the FLS or CLS leakage sensor which is in series with the pump over temperature switch. A low-voltage DC signal is applied to measure the current flow through the sensor and over temperature switch. The sensor controls the current in this circuit. These products have isolated output contact relays, one for over temperature and one for seal leakage. With input voltage applied, normal temperature condition (thermal switch closed) and no seal leakage, the sensor current will be in the normal range. The over temperature relay is energized and the seal leak relay is de-energized. Both LEDs are Green, indicating normal conditions and input voltage applied. When the motor temperature rises and the N.C. thermal switch opens, the sensor current drops to zero. The over temperature relay is de-energized, opening a contact that had been closed and turning off the pump contactor. The TEMP LED turns Red. If the over temperature condition is cleared, the unit will reset based on the setting of the Over Temp switch. In the AUTO mode, the unit will reset automatically. In the MANUAL mode, the Over Temp Reset button must be pushed to clear the alarm and reset the relay. In a seal leakage condition, contaminating fluid enters the pump motor cavity. The sensor lowers its resistance, increasing the sensor circuit current above the trip point. The seal leakage output relay energizes and closes a contact, which can be used to give an alarm indication of a leaking seal. The LEAK LED turns Red. If either an Over Temp fault condition when the Over Temp switch is set to AUTO or a Seal Leakage fault has been automatically cleared, a cleared fault indication is displayed by flashing the corresponding Red TEMP LED or Red SEAL LED. The flashing indication may be manually reset by pressing the Over Temp Reset button. Note: if either fault still exists when the Over Temp Reset button is depressed, it is ignored. If the sensor wires are shorted, the unit will display a Shorted Sensor condition by alternately flashing the Red SEAL LED and the Red TEMP LED. If the short is removed, the fault will automatically reset within 30 seconds.

Description of Function

Product Overview


Monitors Submersible Pumps for Over Temperature & Seal Leakage Works with Pumps using CLS or FLS Leakage Sensors Auto & Manual Reset for Over Temperature Low-Profile Adjustment Switch & Reset Button Full status indication on top of unit for easy troubleshooting 11 Pin Back-Mounted Socket Provided with Relay

Enclosure Style:

Flange-enclosure designed for deadfront door-mounting
Configuration / Contact Rating:
(2) SPDT / 7A @ 240V AC/7A @ 28V DC
Application Information:
Voltage Tolerance: AC Operation: +10/-15% of nominal at 50/60 Hz. Load (Burden): 3 VA Indicator LEDs: Seal Leak: Green ON with input voltage applied; no seal leak and relay energized; Red ON when seal leak detected and relay de-energized Temperature: Green ON with input voltage applied, normal temperature condition and relay energized; Red ON when over temperature detected and relay de-energized Probe Voltage: 5V DC Response Time: Pick-up & Drop-out: 1 Second Output Contacts: 7A @ 240V AC/7A @ 28V DC, 1/4HP @ 120V AC (N.O.) Life: Mechanical: 10,000,000 operations; Full Load: 100,000 operations Temperature: -28° to 65° C (-18° to 149° F)
UL #: E109466


(2) SPDT / 7A @ 240V AC/7A @ 28V DC

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