Boiler and Steam Generator Water Level Control Relay

Product Description

The water level control relay is designed for use in boilers, steam generators, and water heating systems, where it ensures automatic shutdown of the electric heating system when there is insufficient water in the tank.
It prevents the heater from running dry, protects the equipment, and extends its service life.

The device operates with two independent tank systems - TANK (well / tank) and BOILER (boiler / heater).

Equipment Functions

Tank Level Control (TANK)

• While the water level is above the TANK electrode, the pump operates (the "motor operation" indicator lights up).

• When the water level drops below the TANK electrode, the pump switches off.

Boiler / Heater Level Control (BOILER)

• When the BOILER sensor level is reached, the pump switches off - the tank is full.

• If the level in the boiler drops below the BOILER electrode, a 10-second delay activates, after which the pump automatically turns on and fills with water.

Electric Water Heating Control (RES Elect)

• When the water in the boiler reaches the RES Elect level, the heater is activated (the indicator light turns off).

• If the water level drops below the RES Elect level, the heater will switch off and the indicator light will turn on.

This function protects the heater from overheating or damage when the tank is empty.

Electrical Installation (Overview)

• Com Elect - common electrode (must be connected to the metal casing of the tank / boiler; if it's non-conductive, use a separate electrode)

• Tank Elect - well / tank level electrode

• Boiler Elect - boiler level electrode

• Res Elect - heater control electrode

• Res Out - heater connection output

• Water Not - signal light (no water) output

Important Notice

• Electrodes are not included in the kit - they must be ordered separately.

• We also recommend purchasing 3 pcs. 2 A circuit breakers to protect the input and output circuits.

• Connect the relay exactly according to the manufacturer's diagram.

• If the socket is not conductive, a special common electrode must be used.

Technical Parameters

• Rated voltage: 220 V AC

• Operating voltage range: 90-110 %

• Frequency: 50/60 Hz

• Power consumption: < 3 VA

• Operating temperature: -40...+50 °C

• Connection: screw terminals

• Mounting: DIN rail or mounting plate

• Water level control relay

• Documentation / wiring diagram
  (electrodes not included in the kit)