Running out of hot water in your home? You may want to turn the temperature on your electric water heater up to keep the heating element on longer. Most water heaters have old style controls that require a screw driver adjustment and torque spec to turn up the temperature specification when the heating element will turn off. By replacing these old style controls with new electronic temperature switches you are able to change this temperature using adjustment knobs and displays making things easier on the end user.
Electronic temperature switches come with different styles of sensor that control a relay. As the temperature increases in a water heater, the sensor sends a 0-5V signal to the controller which opens and closes the relay contacts at the chosen temperature. For hot water heaters, if you want the heating element to stay on longer, you would increase your temperature using the adjustment knobs and display to what is desired (most people don’t go above 10°). Once the chosen temperature point is achieved, the signal opens the relay contacts shutting down (limit) the heating element and over time you will notice your hot water begin to disappear.
Old style controls such as capillary switches will also do this adjustment that we have outlined here. The electronic temperature switch is a more user friendly and cost effective solution given the adjustment knobs with display feature, but functions just the same.
Electronic Temperature Switch
The electronic temperature switch is available in three different models: operator adjustable, internal adjustment, or fixed. The operator adjustable style allows the end user to change the temperature set point when the contacts will open and close. The internal adjustment can be set upon install of the device inside the equipment, or the fixed is flashed with the requested temperatures – common with original equipment manufacturers. The operator and internal adjustment have a simple OLED display which gives the end user a visual of the temperature specifications.
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