Single, Double Element Water Heater Wiring Connection with Thermostat

Hey, in this article we are going to see the Single and double-element water heater wiring and connection diagram. An electric heater is an instrument that converts electrical energy into heat energy. The connection diagram, we are going to see is used in geysers or any household heating system. Electric heaters are very useful during the winter seasons for water heating, room heating, and many other applications. Heaters are wired with the objective of proper heating, safety, automatic, On, Off, etc. As an electrician, you must know the connection or wiring diagram of water heater. It will help you to find out the internal fault in a water heater system and is easy to repair.

There are two types of water heater systems mostly used - 1. Single Element Water Heater and 2. Double Element Water Heater. Single-element water heaters are those which use a single heating element for heating on the other hand double-element water heaters are those which use two heating elements for heating. Most of the water heaters come with a thermostat connection. A thermostat is a device that allows it to turn On or turn Off the heating element automatically. Also, we can set the temperature according to our requirements. So, here we will see the thermostat connection also.

There are two types of thermostats used in a double-element water heater system - Upper Thermostat and Lower Thermostat. The upper thermostat has a total of five terminals for its connection and the lower thermostat has a total of two terminals for its connection. Here, you can see the terminal diagram of the upper and lower thermostat.

Single Element Water Heater Wiring Diagram and Connection

Here, you can see the connection diagram of the single-element water heater.

Procedure to wire a Water Heater

1. Connect the upper right-side terminal to the phase terminal of the power supply.

2. Connect the upper left side terminal to the neutral terminal of the power supply.

3. Connect the lower right side terminal to the phase terminal of the heating element.

4. Connect the lower left side terminal of the thermostat to the neutral terminal of the heating element.

Remember that a single-element water heater can be operated at 120V or 230V AC Supply. Also, note that the thermostat used in a single-element water heater system is different from the thermostat used in a double-element water heater system. The thermostat used in a single-element water heater system has two terminals on the right side whereas the thermostat used in a double-element water heating system has three terminals on the right side.

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Double Element Water Heater Connection Diagram with Thermostat

Here, you can see the wiring and connection diagram of double element water heater system with the thermostat.

Connection Procedure

1. Connect the upper right side terminal of the upper thermostat to the phase terminal of the power supply.

2. Connect the upper left side terminal of the upper thermostat to the neutral terminal of the power supply.

3. Connect the upper right middle terminal of the upper thermostat to the phase terminal of the upper heating element.

4. Connect the lower left side terminal of the upper thermostat to the neutral terminal of the upper heating element.

5. Connect the phase terminal of the lower heating element to the upper right middle terminal of the upper thermostat.

6. Connect the neutral of the lower heating element to the lower right side terminal of the upper thermostat through the lower thermostat as shown in the above figure.

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