Water level control relay for boiler and steam generator

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 heater when water is lacking in the tank.
It prevents the heater from running "dry," protects the device, and extends its lifespan.

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

Device functions

Tank level control (TANK)

• As long as the water level is above the TANK electrode, the pump runs (the "motor running" indicator lights up).

• If the level falls below the TANK electrode, the pump turns off.

Boiler/heater level control (BOILER)

• When the level reaches the BOILER sensor, the pump turns off – the boiler is full.

• If the level in the boiler falls below the BOILER electrode, a 10-second delay starts, after which the pump automatically turns on to refill the water.

Electric water heating control (RES Elect)

• If the water in the boiler reaches the RES Elect level, the heater turns on (the indicator turns off).

• If the level falls below the RES Elect electrode, the heater turns off and the indicator lights up.

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

Connection (overview)

• Com Elect – common electrode (must be connected to the metal housing of the tank/boiler; if not conductive, use a separate electrode)

• Tank Elect – level electrode in the well/tank

• Boiler Elect – level electrode in the boiler

• Res Elect – electrode for heater control

• Res Out – output for heater connection

• Water Not – output for signal lamp (water shortage)

Important warning

• Electrodes are not included in the package – they must be ordered separately.

• We also recommend purchasing 3 pieces of 2 A fuses to protect the input and output circuits.

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

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

Technical specifications

• Rated voltage: 220 V AC

• Operating voltage range: 90–110 %

• Frequency: 50/60 Hz

• Power: < 3 VA

• Operating temperature: -40…+50 °C

• Connection: screw terminals

• Mounting: DIN rail or mounting plate

• Water level control relay

• Documentation / wiring diagram
  (Electrodes are not included in the delivery)