Existing varieties
All this allows to achieve a significant reduction in natural gas consumption. Despite the fact that the cost of a wall-mounted heating boiler is higher than that of a conventional floor heating boiler, the difference is covered in just one to two years. Of course, depending on the intensity of its use.
Important feature
Since such solutions use not only gas, but also electricity, in its absence, the operation of a wall-mounted boiler is impossible. Not only the circulation pump is turned off, but also all internal boards. The result is simple - the boiler does not work. Even if there is gas in the system. Here is such an unpleasant feature. And if the owner of such a modern water heater does not take care in advance to purchase a suitable uninterruptible power supply for the boiler, then if there are problems with the power supply, you will have to freeze in your own house. We strongly recommend not to rely on the stability of the power grid, as very often the causes of failures are weather conditions that can damage any, even the most reliable electricity distribution system. Here it is - a wall-mounted gas boiler. An uninterruptible power supply makes it possible to provide it with energy forthe time needed to restore the centralized power supply.
Give me two buckets of current…
Others, who only remotely imagine what a sine wave, electrical voltage and direct current are, cannot choose the right uninterruptible power supply (UPS). As a result, using the advice of "experts", many purchase incompatible UPS for gas boilers, which at best leads to errors in the operation of the control electronics. Indirectly, this means a decrease in efficiency. In the worst case scenario, the use of incorrectly selected UPS for gas boilers causes the failure of some expensive logic blocks and the need to replace them. Our recommendation is the following: before buying a backup power source for a wall-mounted heating boiler, you need to carefully read the information on this issue and understand the basic principles of operation of such a system. An extra hour of time spent later can save an impressive amount. Moreover, there is nothing complicated in this. When choosing an uninterruptible power supply for a boiler, there are only a few key points to consider.
What feeds the heater
So, if it is indicated that the boiler requires 230 V for its operation, then the voltage should be exactly that (+ -10%, which is provided by the standard). In addition, although many people know that the current in household electrical outlets is alternating, not everyone understands what this means in practice. In fact, the term " alternating" indicates a feature of this type of current - the presence of a sinusoid. That is, the direction of motion of charged particles flowing through the conductor is periodically reversed. Household electrical appliances are designed to work in this mode. Obviously, if this is not observed, then malfunctions in the functioning of the sensitive elements - the same electronics - are possible. In addition, a mismatch in the network parameters causes increased heating of the constantly running pump motor.
The conclusion is simple: when buying an uninterruptible power supply for a boiler, you should definitely study the specification for it and make sure that the selected backup unit outputs exactly a pure sine wave to the device. Otherwise, it is better to refrain from buying this particular UPS and look for alternative models.
Sine wave
"Motorists know that all existing batteries provide direct current. In order to turn it into a variable, you must use a special electronic circuit."
All uninterruptible power supplies cope with this task, but if you connect an oscilloscope and look at the sinusoid created by inexpensive models, then instead of a parabola, a stepped pyramid will be displayed on the screen. For consumers who are undemanding to this characteristic of the power grid, this fact is completely unprincipled. For example, lights, computers with their own transducers, and many other pieces of equipment work just fine. However, if instead of a sinusoid at the output there is a “pyramid”, then no one guarantees the stable functioning of the electronic boards of heating boilers.
Types of batteries
The disadvantage is high cost, short life (official data taken from ideal systems) and, most importantly, low capacity, which requires the collection of entire blocks of such batteries, unless, of course, the owner wants to be limited to just a few tens of minutes of work boiler.
From the dotin terms of expediency, car batteries are more preferable. The appearance of maintenance-free models makes it possible not to prepare acid solutions and control the residual capacity of the electrolyte liquid. In terms of cost per capacity, these batteries are just perfect. Their disadvantage is that during the charging process a small amount of hydrogen is released into the air, so it is recommended to place them outside the living quarters.
Restoring charge
It can be a standalone device, or it can also be part of a backup source. Obviously the latter is preferable. It is important that the charge current is sufficient to replenish the capacity of the batteries.
Working principle
All such sources are divided into two classes: with normal and double conversion. Devices of the first type, in the event of a power outage in the network, switch to battery power, take 12 (24) V DC voltage from them, which rises to 220 V and becomes variable (we mentioned the sinusoid earlier). Much more expensive solutions of the second type. In them, the converter works not only when running on batteries, but also in normal mode. The alternating current of the network is rectified and fed to the sine wave generator. That is, all the time the UPS operates on the principle of " alternating - direct - alternating" current. itallows you to guarantee an ideal sine wave at the output, regardless of the spread of the parameters of the external network. Name - double conversion uninterruptible power supply or inverter UPS (online).
Ratings and lineup
According to official figures, UPSs with conventional conversion, but with an ideal AC sine wave, are most in demand. The sources of the Ukrainian company, sold under the Leoton brand, have gained the greatest popularity. The internal electrical circuit in them is simply perfect - everything is thought out to the smallest detail. However, the assembly itself is often so bad that the question arises: "How does it even work?" Perhaps this sad fact will be eliminated in new models.
From foreign analogues, new solutions from APC are distinguished, characterized by a sinusoidal signal. This, for example, is the Smart-UPS SUA1000I model with a power of 1000 VoltAmps (about 700 W). When connected to a computer, control via USB or serial interface is possible. Its weight is about 20 kg. The pre-installed battery charge time is 3 hours. It is not possible to specify the duration of operation, as it depends on the electrical power consumed.
Double conversion solutions, as we pointed out, are quite expensive, so it is advisable to use them either for large disturbances in the power grid, or if there are "extra" funds. APC Smart-UPS On-Line SURT1000RMXLI is the leader in the rating of these devices. Its weight is almost 30 kg. Gives out 700 watts of power. In this mode, it can work for 10 minutes. Charge lasts 3hours. When working from the network, it can regulate the voltage in the range from 100 to 280 Volts.
Here is a list of requirements that a good UPS for a boiler must meet:
- Pure sine wave output.
- The output electric power corresponds to the consumption of the boiler. Usually the excess should be at least 30%. That is, if the water heater of the heating system consumes 100 W, as indicated in the instructions, then the uninterruptible power supply for the boiler must be able to produce at least 150 W, and preferably more.
- The design provides for automatic switching of operating modes depending on the state of the main network.
- Batteries for UPS for boilers must be recharged by the charger of the backup source itself to the desired value without human intervention. And regardless of their type.
- Good UPS for heating boilers should contain a protection system against frequent switching. When the power supply is restored to the main line, the “transition” to it must be carried out with a delay.
- The current value of the built-in charger must be sufficient to restore the electrical capacity of the connected battery.
- Build quality should not be artisanal, which is what some models of one well-known company do.
Thus, if you take into account all the above nuances when buying, then deciding how to choose a UPS for a boiler will not present any difficulties. Within the framework of this article, it is not possible to cover all the nuances, therefore, about the connection rules and subsequentoperation, you need to look for more information.
