Electric Heat Strips Wiring Diagram – In the Electric Water Heater and Thermostat Wiring and Installation series, we’ll show you how to wire and install a 120V AC single-phase (US) and 230V AC single-phase (EU) two-element water heater and thermostat. / Great Britain).
Continuous or non-simultaneous heating elements are interdependent, meaning that both elements are not “ON” at the same time. In other words, the top heater turns on and heats the top of the water tank first. When cold water enters the tank, the excess or lower element turns on. It is an automatic process thanks to the thermostat connection, the lower thermostat and the body are controlled by the upper thermostat, which automatically turns on the lower body if necessary.
Electric Heat Strips Wiring Diagram
This way, both elements will not work at the same time. Simply put, either the top or bottom heater is “ON” or both are “OFF”. Keep in mind that one thermostat can be wired for simultaneous or continuous operation, with two elements working simultaneously in case of high hot water consumption. Don’t worry, we’ll cover this type of action in future posts.
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In the non-synchronous connection of the water heater thermostat, the phase or hot “L” is connected to the left terminal L1 of the upper thermostat, and the neutral “N” is connected to the right terminal L3. Two wires come out of L4 as neutral to the upper and lower heating elements. The upper heating element is connected through T2 and L4.
The lower thermostat is connected through T4 of the upper thermostat, which is connected to terminal “1” of the lower thermostat. The other terminal “2” is connected to the lower heating element.
With two heating elements of approximately 1900 watts each, the total power consumption of this heater is 3800 watts. Since only one element is operating at a time, we will size the breaker and switch at half the total input power rating, or 1900 watts.
Now how about a 120V AC, 20A circuit breaker, and a one-way switch that works for both 12 meter wires? Let’s look at the following.
Unit Running In Heating At Startup (ecoer Unit)
Another way is the safety limit of the circuit breaker is 80% (0.8), in this way 20A x 0.8 = 16 Amp, which is safe for the load current.
Thus, a 20A circuit breaker is suitable for overcurrent protection for a 120V AC two-cell dead water heater circuit.
The following wiring diagram shows the same wiring as above regardless of breaker and switch size according to NEC and IEC standards. Wiring and operation are the same as above for 120V configuration.
In this case, the current flows through L1 and L3 (upper thermostat), which control the upper body. Once the temperature at the top of the water tank reaches the desired temperature (150° to 180°F nominal), loosen the bimetallic strap on the upper thermostat, disconnect T2 from T1, and connect T1 to terminal T4. . In this way, the upper cell is turned off and the feed continues to the lower cell through L4 and T4.
Choosing, Installing And Wiring A Home Thermostat
This process is shown in the following figure. Figure (a) shows the operation of the upper element, while figure (b) shows the operation with the lower thermostat and element active.
Note: In the diagram above, the red color represents the line or phase conductor and the black color represents the neutral conductor in the figure above. You can follow the local cable color code ie IEC or NEC.
120V AC 230V AC Dual Element Water Heater Electric Water Heater Wiring Installation IEC NEC Continuous Water Heater Water Heater Thermostat Simultaneous Water Heater No Water Heater
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Please refer to the manufacturer’s user manual and/or manufacturer’s warranty documents for a full explanation of all warranties applicable to this product, as well as individual manufacturer requirements. Online warranty registration must be completed within 60 days of installation. Online registration is not required in California or Quebec due to state laws. Please call to find out if there are scratches, dents or a longer warranty.
Installation of any product must comply with all applicable codes and regulations. Installation may require the services of a qualified and experienced electrician.
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