CZ6205U1 - Circuit arrangement for control, check and measuring electric boiler water heating - Google Patents

Description

Technical field

The technical solution relates to the circuit for controlling, controlling and measuring the water heating of the electric boiler.

BACKGROUND OF THE INVENTION [0002] Wiring methods are known, where a contactor placed in the electric boom is switched on by the inverter to the electric boiler. The contactor is controlled by the domestic hot water signal or by the timer, when night current is taken, according to the schedule of the power distribution plants. For this reason, the control, measurement and control of the water cannot be carried out by the digital thermostat because the supply voltage is lost when the contactor is switched off and the user is not able to monitor the temperature of the heated water because the display on the thermostat is off. To measure the water temperature in the boiler, a four-wire connection with a fixed phase is required.

The essence of the technical solution

The above drawbacks are eliminated by the circuitry for controlling, controlling and measuring the water heating of the electric boiler according to the technical solution consisting of a controlled power contact, which is connected by one outlet to the supply phase and the other by a thermal fuse to the digital thermostat which controls the preset water temperature. The essence of the solution lies in the fact that a resistor is connected in parallel to the contactor.

Advantages of the proposed solution consist in more precise regulation of water heating by the thermostat, the fourth conductor for the thermostat supply is not needed and the water temperature on the thermostat display can be performed even when the power supply is switched off.

BRIEF DESCRIPTION OF THE DRAWINGS FIG

The technical solution is described in more detail in the figure.

^J Execution example

The wiring for controlling the water heating of the electric boiler according to the figure comprises a power contactor 1 which is connected at one end to the supply stage L1 and the other end is connected via a thermal fuse 4 to the thermostat 6. The power contactor 1 is controlled by a remote control signal or a timer 2 · Sensor 5 is also connected to the thermostat and heater 8 is connected to relay 7. ·

If a 2 pulse is provided for the contactor 1 to be triggered from the remote control or the timer, the phase voltage L1 passes through the contactor contact 1 and the thermal fuse 4 into the thermostat 6, which receives full line voltage. The relay 7 feeds the heater 8 and by means of the sensor 5 the thermostat 6 controls the preset temperature in the boiler. If the signal from timer 2 is switched off, contactor 2 j® is disconnected and via resistor 2 it reaches the thermostat terminals 6 reduced

-1CZ 6205 Ul Voltage. This condition is evaluated by thermostat 6, relay 7 is disconnected and power supply to heater 8 is interrupted.

Claims (1)

PROTECTION REQUIREMENTS A wiring for controlling, controlling and measuring the water heater of an electric boiler comprising a controlled power contactor connected by one outlet to the supply phase and the other through a thermal fuse to a thermostat, characterized in that a resistor (2) is connected in parallel to the contactor (1).