Electric Heater Wiring Diagram

Electric Heater Wiring Diagram – In our Electric Water Heater and Thermostat Wiring and Installation category, we will show you how to wire and install a water heater with two elements continuously (non-connected) and a heater for 240V AC single phase (US) and 230V AC single phase. (UK/EU).

Continuous (equal) and continuous (constant) as described earlier. In a contact wire, all the heating elements work at the same time, in a non-contact wire, one heating element is on at the same time and the other is “ON” when it finishes heating and removes the power. Just give the thermostat wires.

Electric Heater Wiring Diagram

Electric Heater Wiring Diagram

In this post we will show two products of 10kW (5kW Heating element each), 240V AC AC from the 120/240V main panel and 7kW dual element (3.5k heating element each) 230V AC and 240V AC thermostat wire. continuous operation, i.e., one heating element will operate at the same time.

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As in the previous version, the top heater is connected to a single phase 240V AC via a 30 amp circuit breaker. Line (L1) connected to thermostat terminal L3 as hot wire. Two wires (blue and red) are connected from the L4 thermostat to the first terminal of the high and low heating elements, and the terminal T4 of the upper heater is connected to the low thermostat and the second terminal of the upper terminal T2. burn something. . Finally, terminal “2” of the lower thermostat is connected to the second terminal of the lower heating element.

Electric Heater Wiring Diagram

The asynchronous thermostat automatically turns off the upper heater and turns on the lower one after a successful operation. The picture below shows it very well.

Since there are two heating elements, each about 5,000 watts, the total power of this heater is 10,000 watts. We will use an inverter that works one at a time at half the amount of water, for example 10kW.

Electric Heater Wiring Diagram

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Now in the case of 240V AC, the 30A breaker is equal to the size 10 of all the wires, so the following calculations.

Alternatively, the safe limit of the circuit breaker is 80% (0.8), so 30A x 0.8 = 24 Amp, which is safe for the current load.

Electric Heater Wiring Diagram

Therefore, a 30A safety current, 5W circuit for two-phase continuous water heater is suitable for 240V AC.

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The following 7kW (each heating element is 3.5kW) has the same wiring as the above for the 5kW heater, except that a 20A single-way switch has been used for ON/OFF at 230V AC. Note that these switches are not suitable for 240V double line.

Electric Heater Wiring Diagram

In the following wiring diagram for a water heater for continuous operation of 3500 watts, the two wires from the main distribution board are shown as “L” and “N” for the 230V AC power, and L1 and L2 for the two AC lines of the 2401.

Note: Red color represents Line or Phase Wire, Black color represents Neutral Wire in above picture. You can follow standard wiring codes such as IEC or NEC.

Electric Heater Wiring Diagram

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Electric Heater Wiring Diagram

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As part of this project, I recently installed an electric heater in the workshop. I chose a ceiling fan with a 6000W model. This special heater is built into a circuit breaker and a thermostat.

Electric Heater Wiring Diagram

The workshop was wired for 50Amp 240V with 8 conductors, so I chose a 240V heater. The heater manufacturer recommends using a heater kit rather than a heater installed in a thermostat.

The thermostat is set to the desired temperature. When the temperature is below this point, the contact inside the heater closes and 24VAC current flows to the contact coil. This powers the coil by connecting the 240V circuit, driving the heater. When the temperature rises above the set point, a relay inside the thermostat opens, interrupting the 24VAC signal to the contact coil and closing the heater.

Electric Heater Wiring Diagram

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There are two types of thermostat. One is a thermostat rated at 240V, which is installed and connected to the line voltage. Another option is to use a furnace heater and wires for low voltage and relays.

I chose a 240V, 40A contactor, 24VAC transistor and a heater. The contactor is very responsive. A low voltage is used to energize an electric coil, which turns on the contact.

Electric Heater Wiring Diagram

Installing the connection wires is easy. I chose a 2 pole contactor to break both legs of the 240V circuit. Line side and wires to the conductors at the bottom of the contactor. The load side is connected to the wires above the wires.

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I used a 240V/24VAC transformer for the output. The transformer is connected to the side of the contact line. A transformer steps down the power from 240VAC to 24VAC. The output part of the transformer is wired to the coil in the contactor. The thermostat breaks the positive side of the 24VAC circuit, allowing it to adjust or control the contact. This wire looks like (Note that the heater is mounted outside the box and is not shown in the pictures below. It is connected to the red and white bell wires):

Electric Heater Wiring Diagram

This is a link. The conductors and wires of the transformer are connected to the ground. The load conductors are connected to the surface. The positive 24VAC output from the transformer is connected to the right and the negative output is connected to the left.

This is a transformer. It is designed to support three voltages, 120V (white wire), 208V (red wire) and 240V (orange). 240V input voltage is orange. The other electrical inputs, the red and white wires, are insulated because they are not used. The 240V power cable is connected under the transformer. 24 VAC output to the head of the converter in the figure.

Electric Heater Wiring Diagram

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