electric water heater is a must-have appliance for every household today, but in terms of choice, some people choose water storage electric water heater , while others choose instant electric water heater .
Today, Noks Wallaby will introduce to you the advantages and disadvantages of instant electric water heater, as well as precautions for installation and use!
1. Advantages of instant electric water heater
From the appearance, instant water heater is relatively small and exquisite . It is usually the size of a 17-inch LCD display box. It is not like the traditional bucket water heater has a large water storage tank, which is large in size and weight. It must be installed on the load-bearing wall when used.
Therefore, it is more convenient to install an instant electric water heater. You don’t have to consider whether it is a load wall at home, and after setting the temperature, you don’t have to consider whether it will affect the decoration effect of the bathroom.
From the perspective of usage experience, the instant hot water heater is very fast, and can achieve the effect of hot water in 3 seconds , avoiding waiting time.
In addition, is more energy-saving and power-saving and water-saving than water-storage electric water heaters.
The water storage water heater is automatically heated the water in the water storage tank to a certain temperature in the insulation state, and then powered off and insulated.
Therefore, when the temperature of the water drops to a certain level, it will automatically heat and cycle. The amount of hot water required for instant water heaters and the amount of electricity used, the power outage will be lost when the water is cut off, which is truly energy-saving and power-saving.
Instant-heating water heater is small in size and energy-saving. So what issues should be paid attention to when installing and using it at home?
2. Installation requirements for instant-heating electric water heater
has high power, and the circuit requirements are high during installation, which is one of the disadvantages of instant-heating water heater.
In order to ensure the instant opening and instant heating feature, its power level will generally not be less than 6kw.
is basically 220V AC current for a family, so the current value can be calculated based on the power formula.
6KW instant water heater current carrying capacity: Power formula: P=UI, I=P/U=1kW / 220V ≈4.545A =4.55A, and then calculate the safe current carrying capacity of , 6 kW * 4.55 A/ kW = 27.3 A. Through such calculations, you can clearly see that the safe current carrying capacity of 6KW instant electric water heater is 27.3A.
According to the national standard "GB/T 4706·1-2005", the maximum current does not exceed 80% of the wire current carrying capacity, so it can be calculated that when the maximum current in the line is 27A, the current carrying capacity of the wire is at least 27/80%≈34A, which is safe only after reaching this value.
Therefore, 6kw instant electric water heater Its circuit requirement is that the power cord needs to be above 4 square millimeter , and the power instant electric water heater must even reach 6 square millimeters or 10 square millimeters.
In addition, if your home really plans to use a high-power instant water heater, in addition to laying more than 4 square meters of wires, you should also pay attention to three points - the 4-square wire must be met at the same time as these three requirements, so it is not a waste:
1. The external wire is the wire between the meter and the distribution box , which cannot be less than 16 square meters.
We can remove the panel of our home distribution box, find the main switch, and see the thickness of the wires of the two terminals on the switch. These two wires are the external wires.
2. The rated current of the meter cannot be less than 15 (60)A. Otherwise, if the current is too high, the meter will start the automatic power-off protection function, and the thicker wires will be useless.
3. circuit breaker mainly depends on the circuit switch of the main switch and the 6 square wires are located. The rated current of the circuit switch cannot be less than 40A, and the rated current of the main switch must be greater than the circuit switch. If the first two points are inappropriate, you can only give up. If this is inappropriate, you can replace the switch by yourself.
