What is an instant water heater? Classification of instant water heaters Are instant water heaters good?

Instantaneous water heaters are also called fast or instant water heaters. The basic characteristics of instantaneous water heaters are: cold water and hot water come out. As long as you open the faucet, the energy will be continuously supplied within a few seconds. Hot water, when the hot water is not used, the water heater will stop working when the faucet is turned off.

Electric instant water heater

Instant electric water heater is a water heater that can quickly heat running water through electronic heating components, and can control water temperature, flow rate, power, etc. through circuits to make the water temperature reach a temperature suitable for human bathing. It heats immediately, no need to wait, heating can usually start within seconds. The energy-saving instant electric water heater saves up to 30%-60% of electricity. The product is equipped with a heat recovery device and can be used with 2.5 square millimeter wires. The product is divided into two types: surface-mounted and concealed. It is suitable for use in large shower ceilings and is suitable for a large number of applications. In hotels, hotels, homes and other environments, a family only needs 1 kilowatt hour of electricity to take a shower a day.

Gas instant water heater

Flue type: large smoke outlet, thick pipe, poor backdraft resistance. The outdoor air flow can easily blow into the water heater through the thick smoke pipe, causing accidental flameout or reverse combustion and damaging the water heater. Therefore, it cannot be installed on high floors (it can only be installed below the 7th floor). Because the open combustion chamber has low combustion efficiency and energy efficiency The level is Level 3 and is currently in the phase-out period.

Forced exhaust type: It adds a strong exhaust fan on the basis of the flue machine. The function of the fan is to suck the air outside the water heater into the combustion chamber to help combustion (high combustion efficiency. Energy efficiency level is 2) and at the same time, the combustion The exhaust gas is forced to be discharged outdoors due to the high wind pressure inside the water heater and the thin exhaust port. The outdoor end is connected with a special windproof smoke pipe, so it can be installed in high-rise elevator apartments.

Constant temperature type: On the basis of the forced exhaust machine, two main components are added. Microcomputer display controller and gas proportional valve. When the water pressure, air pressure, and external temperature change, the microcomputer controls the gas proportional valve to automatically adjust the size of the gas to keep the water temperature constant (the constant temperature speed depends on the accuracy of the gas proportional valve. The response time is 5-25 seconds). For example, when using a 10-liter constant temperature water heater When the water is reduced by half, the capacity of 10 liters becomes about 5 liters. The faster and constant temperature indicates that the water heater has a better thermostatic effect. Normally, washing hands and dishes does not require the maximum amount of water for rinsing. The thermostat with small water volume and low water pressure can start working normally. The outlet temperature of large and small water is the same, which saves water and gas to a certain extent. This is something that flue machines and forced exhaust machines cannot do. It is based on the fact that the temperature can be set by itself, the temperature is constant, and the low water pressure starts. The thermostatic machine is an upgraded and enhanced version of the forced exhaust machine and is now a mainstream machine. type.

Condensing type: The function of the condensing machine is high efficiency and energy saving (national level 1 energy efficiency). The condensing machine adds a condensing heat exchanger on the basis of the thermostatic machine. Its function is to recycle the high-temperature exhaust gas that should be discharged out of the machine into the condensation exchanger to absorb heat again, and at the same time separate the condensed water in the high-temperature exhaust gas to protect the water heater from corrosion and extend the service life of the water heater. Formation of condensation water: There is moisture in the air. When the high-temperature exhaust gas of 100-200 degrees encounters the condensation water tank with only 10-20 degrees, the moisture in the high-temperature flue gas will instantly condense into water droplets and be discharged from the water heater. Yingxue's spiral V condensation tube is in the shape of an "inverted pyramid", which can absorb heat over the largest area and discharge condensation water more smoothly. The thermal efficiency reaches 103%. The original flue machine used 10 cubic meters of gas now using 6 cubic meters.

Are tankless water heaters good?

In order to fully ensure the application of consumers, instant electric water heaters generally focus on the design in this regard, such as using non-metal heating bodies, water and electricity isolation technology, leakage protection devices, grounding protection and other measures. Therefore, for users, as long as they pay attention to problems during use, instant electric water heaters are good. Here are some common water heater troubleshooting and repair methods.

Instant water heater problem solving

1. Instantaneous water heater does not produce enough hot water

If your water heater suddenly seems to be providing less hot water and you've made sure it's not leaking, flush the water heater tank to make sure mineral deposits aren't reducing the water heater's efficiency. need to be able to do this:

1) Turn off the gas valve or electricity to the water heater, depending on whether it is a gas or electric heater.

2) Let the water cool.

3) Close the water inlet valve and run the hose from the drain valve to a large bucket of water, a drain, or outdoors.

4) Open the drain valve at the base of the tank and open a hot water faucet somewhere in the house to let in the air. When all the water is drained, open and close the cold water valve from the water heater until water runs clear from the drain.

5) Close the drain valve, open the water back to fill the tank, and open the gas valve or electric back (relight the pilot, if applicable). This is also a good time to test the temperature of the pressure relief valve so the boiler builds up too much The pressure is in normal working order. Lift or lower its handle. Water should drain from the overflow pipe.

If these measures don't do the job, the dip tube supplying the cold water tank may be broken or ruptured. It is supposed that the plastic pipe directs cold water to the bottom of the water heater tank, but if it breaks or splits, the cold water pours over the top of the tank by mixing the hot water pipe with hot water.

Have the dip tube replaced or, if the water heater is out of warranty and showing other signs of age, consider replacing it.

2. Instant water heater leaks

Dripping water or water in the foundation of your pool heater can cause any of several problems. How to Fix a Leaking Water Heater Complete coverage of this topic.

3. The instant water heater is too hot

If steam or superheated water shoots out of the faucet, or you hear boiling sounds inside the water heater, the appliance may not shut off to its set temperature.

The job of a thermostatic (TP) valve is to relieve excessive pressure build-up in steam, but this valve may have been installed improperly or may be faulty. Either way, this situation can be dangerous, both because the hot water and steam can burn people, and because the water heater can rupture.

1) Turn on the water heater temperature.

2) Allow water to cool.

3) Replace the pressure relief valve of the water heater. For information on how to do this, see How to Replace a Water Heater Pressure Relief Valve (TP).

4) Return the water heater temperature to normal and wait for about an hour. If the problem recurs, call a water heater repairman.

4. The instant water heater makes noise

Noise coming from the water heater can be caused by expansion and contraction of metal parts; water dripping; or, more likely, a build-up of minerals and hard water inside the tank or scale, on the electric water heater's heating element. When heated, dissolved hard water minerals recrystallize and form scale cakes onto the interior surfaces of water heaters, making them more efficient and less likely to fail.

To minimize the passage of corrosive minerals through ionization, water heaters have magnesium or aluminum anode rods inserted through the top of the tank.

Here are some common water heater sounds you might hear:

Slam, gurgling, or popping. These sounds cause heating and the accumulation of explosive hard water deposits inside the tank. You can flush out the tank yourself, although by the time you hear this sound, the sediment chunks passing through the drain valve may be too large. If you have an electric water heater, these sounds may indicate a scale on the heating element and it may be time to replace these.

If the water boils the sound. It sounds like boiling in the tank, which may indicate overheating and dangerous pressure build-up. Call professional service immediately.

5. The water changes color or tastes bad

If your water smells bad, first determine whether the problem is with the source water or the water heater. If you smell gas near a water heater, turn off the pilot light, close the gas shut-off valve, and call the natural gas utility company for assistance.

In most cases, the odor is caused by a reaction between the water heater's anode rod and the water, which has a high concentration of sulfuric acid. Let the hot water run for two or three minutes. If it smells a bit like rotten eggs, the anode rod may need to be replaced. Call a plumber.