Uninterruptible power supplies for gas boilers

Do I need to buy a UPS for the boiler

1. Insures in case of a power outage.
2. Improves the quality of the supplied current.

The first function is vital.In severe cold weather, a power outage can cause the system to freeze, resulting in costly pipe repairs.

This is not to mention the harm to the health of the residents themselves. In this case, a set is installed (usually near the boiler): UPS + battery. UPS, aka uninterruptible power supply, or stabilizer, as well as special batteries.

From what capacity the batteries will be, how many there will be and what load they will receive from the boiler, it will depend on how long your heating system can work autonomously.

Another function of the UPS is not so noticeable to people, but is tangible to sensitive electronics. The fact is that electricity supplied in our networks is not always of ideal quality.

There are sharp jumps, rises and falls in voltage. The built-in stabilizer will equalize the current to optimal performance.

Why do you need an uninterruptible switch in the boiler room?

Uninterruptible power devices are necessary not only to provide the heating system with electricity, but also to improve the quality of electricity supplied to the gas boiler. Electricity for a modern gas boiler is necessary both for the circulation pump and for other elements of the system, for example, for a control unit equipped with a microprocessor. This technique is usually sensitive to voltage fluctuations in the network, with sudden surges, the processor can simply break down.

The UPS connection diagram shows which elements of the heating and energy systems of the house can be connected to the backup power supply

Modern uninterruptible devices for a gas boiler allow you to provide the output voltage of the mains in the form of a sinusoid.It is this current that is necessary for the normal operation of solenoid valves, motors, pumps, processors, transformers and other heating system controls.

For the correct operation of the circulation pump of the gas boiler, the current must flow along a sinusoid. A UPS designed for a PC does not produce such a current, which can lead to equipment failure.

This figure schematically shows the operation of an uninterruptible power supply that provides electricity to the circulation pump of a gas boiler and other elements of the heating system.

Do not use an uninterruptible power supply designed for the operation of computer equipment with a gas boiler. Such a UPS is usually designed for 10-15 minutes of battery life. This is enough to safely shut down a desktop computer, but the period is too short for a gas boiler. In addition, such an indicator as “phasing” is important for the operation of electronic devices. It must match the profile of the electrical network, which is only possible with the use of a special UPS.

The backup power source is quite simple: a power supply and a battery (or several batteries). Typically a 12 volt battery is used. When the device is connected to the mains, the batteries are charged through the built-in charger, which converts the AC mains current into the 12V required for the batteries. In parallel, 220V electricity is supplied directly to the gas boiler and other equipment. When the batteries are fully charged, the charger turns off and only the regular power supply of the system is carried out.

In the event of a power outage, the UPS automatically converts the 12-volt battery current to 220V and supplies it to the heating equipment until the power supply is restored or until the battery runs out. When electricity reappears in the network, the UPS operation mode automatically changes: the gas boiler again receives power from the 220V network, and the charger restores the full charge of the battery. Switching modes of operation occurs in a fraction of a second, so the operation of electrical equipment practically does not stop.

UPS for gas boilers - how to make the right choice?

Electric current has a graph in the form of a sinusoid. The more geometric the sinusoid, the better the current characteristics.

It is impossible to get a “clean” sine wave from a generator, but it is possible from an uninterruptible power supply. It is an inverter - a device that converts an incorrect sinusoid into a correct one.

A "dirty" sinusoid can provoke overloads in the operation of the circulation pump, hum and cavitation in the system. Uneven power supply is not good for the boiler, so the UPS must have a special electrical circuit and high battery capacity.

a) dirty sinusoid; b) stepwise approximation of a sinusoid; c) pure sine wave

Difference between offline and online

There are 2 types of backup power sources for gas boilers.

• linear-interactive (offline);
• online active (online).

For gas boilers, it is best to choose more expensive, but also more reliable online active power supplies. They give a "cleaner" sine, double conversion and high-quality stabilization.

Mini rating

Among the large number of proposals, a prominent place is occupied by the following brands:

• Energy - models PN-500, 750, 1000, 5000 - are sold with and without batteries;
• Bastion - TEPLOCOM or SKAT models - the ability to work even with car batteries, but for a short time (5 years warranty for the electronic unit);
• Leoton, Phantom or Voltaire;
• General Electric - reliable, but very expensive;
• APC or Eaton - cheap, long life.

It is better to choose reliable Russian-made models, for which the manufacturer is responsible for the correct calculation of batteries and the fulfillment of warranty obligations. Models from Energia, Bastion or Leoton will allow, after proper installation, not to worry about the safe operation of the gas boiler and additional equipment.

Buyer's note and some tips

Energy PN500: price from 6500 to 7500 rubles

Let's summarize the above:

• you need to choose a model not only for financial reasons, but also taking into account the technical capabilities of the device;
• optimal switching time to the electronic unit - 0 ms;
• the battery charge current should be about 4-10 A, otherwise the batteries will charge too slowly;
• it is desirable that a through neutral is present in the circuit of the electronic unit;
• the power of the online system must be at least 1000 VA;
• operational and high-quality stabilization of mains voltage.

Minus temperatures significantly reduce battery life, so you need to provide at least + 4C in the room. The optimum temperature for the operation of the device is +15 or 20 C.

If the gas boiler is installed in an unheated room, it is better to bring the UPS out through the wiring and install it somewhere in a warm room, then the batteries will last much longer and the electronics will not suffer from low temperatures.

Product range of UPS for heating boilers of the TEPLOCOM series

UPS for heating boiler TEPLOCOM-300, rated payload power UPS 270 W, UPS input voltage range within 185-245 V, built-in high-precision voltage stabilization, convenient external battery connection, various types of load protection, network protection, pure sine value graph UPS output voltage, long-term backup due to the use of an external battery, analogue indication. UPS for gas boilers TEPLOCOM-300

used for continuous power supply of boilers for individual heating, equipped with electric circulation pumps.

UPS for heating boiler TEPLOCOM-1000, rated payload power UPS 700 W / 1000 VA, UPS input voltage range within 160-300 V, built-in high-precision stabilization, convenient external battery connection, various types of external load protection, reliable and effective protection networks, fast protection against voltage surges, protection against high-frequency electronic interference, pure sine of the graph of the output signal voltage value, the possibility of a long reserve due to the use of external batteries, real indication of signal levels and operating modes, convenient automatic BYPASS, ONLINE mode. UPS TEPLOCOM-1000

used to ensure the correct efficient supply of gas heating boilers. This UPS makes it possible to work correctly with complex electronics of complex gas boilers, implements the correct mode of operation of the ignition process, and provides proper power for the circulation pumps of the heating system.

UPS of Russian manufacturers

When choosing an emergency power supply for a private house or cottage, you should give preference to devices from well-known companies whose brand has a large number of positive reviews. Among these manufacturers, Russian products can be distinguished, which have been trusted among buyers for more than 1 year.

For example, let's take a simple model of the Energiya PN-1000 UPS with a 75A/h battery. This device is protected from overloads, short circuits, overheating and complete discharge of batteries. Due to the presence of a built-in relay stabilizer, the uninterruptible power supply produces a pure sine wave at the output, which favorably affects the service life of heating equipment, especially with unstable voltage. The input voltage range of this UPS is within 155-275V, the switching time to battery mode is 8ms. You can find detailed characteristics on the website of the official representative.

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UPS requirements for gas boilers and their characteristics

When choosing a UPS for a boiler, you should familiarize yourself with their varieties. They are represented by two main types - these are offline and online UPS. Offline systems are the simplest uninterruptible power devices. They do not know how to stabilize the voltage, switching to batteries only when the voltage drops below a certain value - only in this case a stable 220 V appears at the output (the rest of the time, the UPS works as if in bypass mode).

Choose a UPS with a smooth sine wave, this will contribute to a more stable operation of your heating equipment.

The UPS for the online type boiler performs double conversion of electricity. First, 220 V AC is converted to 12 or 24 V DC. Then the direct current is again converted into alternating current - with a voltage of 220 V and a frequency of 50 Hz. In order to reduce losses, high-efficiency inverter converters are used in their design.

Thus, a UPS for a boiler is not always a stabilizer, while heating equipment likes a stable voltage. It also likes when the output is a pure sine wave, and not its rectangular counterpart (a square wave or a stepped approximation of a sine wave). By the way, cheap computer UPSs with a small capacity battery give a stepped sinusoid shape. Therefore, they are not suitable for powering gas boilers.

An uninterruptible power supply for the boiler, represented by a computer UPS, is also not suitable because the battery capacity is extremely small here - the reserve is enough for 10-30 minutes of operation.

Now we will look at battery requirements. When you come to the store to choose a good UPS for a gas boiler, do not forget to purchase a model with a plug-in type battery - it must be external, not built-in. The thing is that external batteries have a higher capacity, up to several hundred Ah. They have impressive dimensions, so they are not built into the equipment, but stand next to it.

Let's see how to choose a UPS for a gas boiler, focusing on the maximum battery life.Considering that accidents on the lines today are eliminated very quickly, and the maximum time for preventive maintenance is no more than one working day, then 6-8 hours of battery life is enough for us. In order to calculate how long an uninterruptible power supply for a gas boiler will work on a full charge, we need the following data:

• Battery capacity in ampere/hours;
• Battery voltage (can be 12 or 24 V);
• Load (indicated in the passport for the gas boiler).

Let's try to calculate how long the uninterruptible power supply for the boiler will work with a power consumption of 170 W from a battery with a capacity of 75 A / h and a voltage of 12 V. To do this, we multiply the voltage by the current and divide by the power - (75x12) / 170. It turns out that the gas boiler will be able to work from the selected UPS for more than 5 hours. And if we take into account the fact that the equipment operates in a cyclic mode (not constantly), then we can count on 6-7 hours of continuous power.

Table for selecting the battery capacity of an uninterrupted battery, depending on the power of the boiler.

When using low-power gas boilers and two batteries with a capacity of 100 A / h each and a voltage of 12 V, the battery life will be about 13-14 hours.

When planning to buy an uninterruptible power supply for a boiler, you need to pay attention to such a characteristic as charging current. The thing is that it should be 10-12% of the battery capacity

For example, if the battery has a capacity of 100 A / h, then the charge current should be 10%. If this indicator is less or more, then the battery will last less than it should.

Maintenance-free batteries can be charged at lower currents, but the time for a full charge will be quite long.

How to choose a UPS for a gas boiler?

Power calculation

The power consumed by the gas boiler is the sum of the power consumption of the electronics unit, the power of the pump and the cooling fan (if any). In this case, only the thermal power in watts can be indicated in the passport of the unit.

UPS power for boilers is calculated by the formula: A=B/C*D, where:

• A is the power of the backup power supply;
• B is the nameplate power of the equipment in watts;
• C - coefficient 0.7 for reactive load;
• D - three times the margin for starting current.

UPS battery selection

For backup power devices, batteries of various capacities are provided. On some devices, as mentioned above, you can connect an external battery, which allows you to work longer in emergency mode. The larger the battery capacity, the longer the gas boiler will be able to work without electricity. Accordingly, with an increase in capacity, the price of the device also increases.

If an external battery can be connected to the UPS, it is important to know the maximum charge current indicated in the documentation. We multiply this figure by 10 - and we get the capacity of the battery, which can be charged from this device. The UPS runtime can be calculated using a simple formula

We multiply the capacity of the battery by its voltage, and divide the result by the full power of the load. For example, if the device uses a 12V battery with a capacity of 75 Ah, and the total power of all equipment is 200 W, then the battery life will be 4.5 hours: 75*12/200 = 4.5

UPS runtime can be calculated using a simple formula. We multiply the capacity of the battery by its voltage, and divide the result by the full power of the load.For example, if the device uses a 12V battery with a capacity of 75 Ah, and the total power of all equipment is 200 W, then the battery life will be 4.5 hours: 75*12/200 = 4.5.

Batteries can be connected in series or in parallel. In the first case, the capacitance of the device does not change, but the voltage adds up. In the second case, the opposite is true.

If you decide to use car batteries with the UPS to save money, immediately abandon this idea. In the event of an incorrect connection, the uninterruptible power supply will fail, and under warranty (even if it is still valid), no one will change it for you.

It's no secret that batteries get hot during operation. Therefore, it is not necessary to heat them additionally against each other. When connecting several such devices, make sure that there is an air gap between them. Also, do not keep batteries near heat sources (like heaters) or at very low temperatures - this will lead to their rapid discharge.

Installation location

Uninterruptibles for gas boilers should be installed indoors next to the heating system. Like batteries, the UPS itself does not like extreme heat or cold, so you need to create optimal conditions (room temperature) in the room for it to work.

The device is best placed near outlets. If the device is small, you can not hang it on the wall, but simply put it on a shelf. At the same time, the ventilation openings must remain open.

The minimum distance from gas pipes to sockets, including the UPS, must be at least 0.5 meters.

Do I need a stabilizer if there is a UPS

An uninterruptible power supply is a useful and functional device, but it will not be a salvation from all troubles if the quality of the input voltage is poor in the house. Not all UPS models are able to "pull out" low voltage (less than 170-180 V).

If your home really has serious and persistent problems with the input voltage (it is less than 200 V), you still have to install a normal inverter regulator at the input. Otherwise, the gas boiler will be powered only by batteries, which will take away a significant part of their operating life.

How to make a UPS yourself

It seems to many that a backup power source can be made from a computer or car UPS. This is possible, but it will require a lot of technical knowledge in electrical engineering and soldering and assembly skills.

The problem is that they will only last a couple of months, and it will be very difficult to achieve a “clean” sine wave.

We will tell you about one way to make an uninterruptible power supply yourself, but it does not exclude the above disadvantages.

You will need a UPS for your computer without automatic shutdown (after 10-15 minutes). If this is not available, you can take the usual one, but you will have to independently block the auto-shutdown by soldering jumpers on the main circuit.
Uninterruptible for wall-mounted gas boiler

Stages of work:

• the standard battery is removed, and a car battery is put in its place through a transformer for charging at 2A;
• it is necessary to provide additional holes in the case and install a cooler for cooling;
• at the output, it is necessary to achieve the “purity” of the sinusoid due to 2 chokes (taken from a 40W fluorescent lamp) and a capacitor (630V, 0.22uF).They are installed parallel to the load;
• power supply is made through specially removed wires with crocodiles.

Connecting the generator directly to the boiler can cause sawtooth voltage to damage the electronics system and disrupt the operation of all heating equipment. Therefore, the generator must be connected exclusively through an uninterruptible power supply or an inverter.

A separate installation of the inverter is completely unnecessary, as it overloads the electrical circuit.

In this article, we will consider in detail everything related to thermostats for a gas boiler. You will learn about the advantages and disadvantages of various types of thermostats, popular models of devices will be considered and their comparative analysis will be carried out.

Like GSM boiler module allows you to control the heating system from a distance.

Learn how to choose the right gas boiler.

Calculation of power and battery life

What power should I choose a UPS for a boiler room? The calculation here is not complicated.

Just add up the power of all electrical appliances that will be connected through it, and multiply by two. If there is a deep pump, then three - taking into account its starting currents.

The data can be taken from the passport or the instruction manual, or you can look directly at the cases of the products.

For example, for a boiler room where 3 pumps of 90W are installed and the boiler itself is 135W, an inverter from 0.8 to 1.0 kW is suitable. At lower power, the field switches (transistors) will overheat.

If the sum of all electrical appliances exceeds the power of the model you have chosen, suddenly you want to power any household appliances, light bulbs, then initially take them into account, and not just boiler equipment.

Here, the power can already vary from 1 to 5 kW.

And how long will the selected UPS work in offline mode? It all depends on the batteries. Here is a table with the characteristics of the battery capacity and the connected load:

From it you can clearly see in hours and minutes how long your uninterruptible power supply will last for independent operation from the network.

Types of uninterruptible devices

Today, the distribution network offers three types of UPS:

• off-line (on-line);
• on-line (off-line);
• Line-Interactive (line-interactive whether line-interactive).

Types of UPS for gas boilers and block diagrams for their connection

Offline UPS (redundant type)

These are the simplest and cheapest uninterruptible power supplies. Off-line can be translated from English as “not in line”, which reflects the principle of operation of this device. In an uninterruptible device of this type, the upper and lower voltage limits are set, at which the boiler operates normally. As long as the network parameters are within these limits, power is supplied directly from the line.

If the voltage becomes more or less, the switching relay is activated, power is supplied through the UPS from the batteries. When the network parameters return to normal, the relay operates again, turning off the uninterruptible power supply. For a gas boiler, such protection is, of course, better than nothing, but when you turn on / off the network, there are significant power surges. So the stabilization in this case is not complete - there are no big dips or peaks, but the supply voltage is far from ideal. The second disadvantage of offline type uninterruptibles is that they cannot correct the shape of the sinusoid.

Scheme of offline UPS (UPS)

Therefore, off-line uninterruptible power supplies for gas boilers should be used only if you already have a stabilizer installed on a scrap or apartment.It produces an ideal voltage, and the UPS in this circuit simply connects the batteries in the absence of voltage. This scheme is expensive, but creates normal conditions for the operation of equipment that is demanding on the quality of the power supply.

On-line UPS (permanent type)

This type is also called uninterruptible power supply units with double conversion. All because of the principle of operation:

• The input AC voltage is converted to DC and used to charge the batteries connected to the device.
• The DC voltage is converted into AC with an ideal sine wave shape.

It turns out the power supply is converted twice. This guarantees voltage stabilization and an ideal sinusoid shape.

Scheme of work of online uninterruptible

Online uninterruptible power supplies are connected to break the power circuit. While the voltage is normal, the linear power is converted, when the voltage is low, its deficiency is replenished by charging the batteries, in the absence of power supply is supplied from the battery.

The disadvantage of this equipment is the high price and rapid discharge of batteries, which is due to the fact that it is spent on straightening surges. However, if you need the best uninterruptible power supply for a gas boiler, buy online type equipment.

Line-Interactive (line-interactive)

The properties and characteristics of uninterruptible power supplies of this type are not as good as those of online models, but not as bad as those of offline units. There are all the same batteries and a switch that, when the voltage drops, connects the UPS. But to stabilize the voltage, there is a special unit - an automatic voltage regulator (AVR in the figure above).

How an interactive uninterruptible power supply works

The disadvantage of linear-interactive uninterruptible power supplies for a gas boiler is a non-instantaneous switching when the voltage changes. But it is much less than in offline devices, but the voltage is maintained constant (within certain limits). This equipment is the best choice, as it guarantees good results at a relatively low price.

How to calculate UPS power for a gas boiler

1. To understand how many times the starting power of the pump is greater than the consumed power, find the energy efficiency class in the passport. It is designated by letters - from A to G. Experts recommend multiplying the power consumption by 5 for all energy efficiency classes except A: for it, the power is multiplied by 1.3.
2. We add the power consumption of the boiler and the starting power of the pump. We multiply the amount by 1.2 - this is the safety factor.

For example, a boiler consumes 200 W and a pump of efficiency class C consumes 40 W. The total power consumption will be: 200 + 40x5 = 400 watts. Taking into account the safety factor, we get 400x1.2 = 480 W. This is the minimum power rating for your UPS.

Redundant Power Supply Selection Criteria

Redundant power supplies designed to work with heating system pumps should be selected according to several characteristics:

• Power;
• Battery capacity;
• Allowable battery life;
• Ability to use external batteries;
• Input voltage spread;
• Output voltage accuracy;
• Transfer time to reserve;
• Output voltage distortion.

Choosing a UPS for a circulation pump should be based on several basic parameters, the determining one of which is power.

Determination of the required power of the UPS

The electric motor, which is an integral part of the heating system pump, is an inductive type reactive load. Based on this, the UPS power for the boiler and pump should be calculated. The technical documentation for the pump may indicate the power in watts, for example, 90 W (W). In watts, heat output is usually indicated. To find out the total power, you need to divide the thermal power by Cos ϕ, which can also be indicated in the documentation.

For example, the pump power (P) is 90W, and Cos ϕ 0.6. Apparent power is calculated by the formula:

Р/Cos ϕ

Hence, the total power of the UPS for normal operation of the pump should be equal to 90 / 0.6 = 150W. But this is not yet the final result. At the moment of starting the electric motor, its current consumption increases by about three times. Therefore, the reactive power should be multiplied by three.

As a result, the UPS power for the heating circulation pump will be equal to:

P/Cos ϕ*3

In the above example, the power supply will be 450 watts. If the cosine phi is not specified in the documentation, the thermal power in watts should be divided by a factor of 0.7.

Battery capacity

The capacity of the battery determines the time during which the heating system pump will work in the absence of a network. The batteries built into the UPS usually have a small capacity, determined primarily by the size of the device. If the backup power source will work in conditions of frequent and long interruptions in power supply, you should choose models that allow the connection of additional external batteries.

A very informative video about the personal experience of a person who was faced with the purchase of an inverter for a boiler and a heating pump, see:

Input voltage

The mains voltage standard of 220 volts assumes a tolerance of ± 10%, that is, from 198 to 242 volts. This means that all devices used on the territory of the Russian Federation must work correctly within these limits. In fact, in various regions, and especially in rural areas, deviations and power surges can significantly exceed these values. Before purchasing a UPS for a heating pump, it will be very useful to measure the mains voltage repeatedly, during the day. The passport for the backup power source indicates the permissible input voltage limits, at which the device provides an output voltage close to the nominal value.

Output voltage and its shape

If the voltage parameters at the output of the uninterruptible power supply fit within the allowable 10 percent, then this device is quite suitable for powering the pump of the heating system. The time it takes for the control board to switch to battery power is typically less than tens of microseconds. For an electric motor, this parameter is not critical.

A very important parameter of the UPS, which is necessary for the correct operation of the heating system pump, is the shape of the output signal. The pump motor requires a smooth sine wave, which only a double conversion device or an on-line UPS can provide of all backup power models. In addition to the ideal sine wave at the output, this source also gives the exact value of voltage and frequency.

When installing a UPS for a heating pump, some rules should be followed:

• The temperature in the room must correspond to the values ​​\u200b\u200bspecified in the documentation;
• The room should not contain vapors of caustic reagents and flammable liquids;
• The ground loop must be made in accordance with the rules for the operation of electrical installations.

Selection options and types of UPS

The correct choice of power source largely depends on the parameters of the boiler. In order for the UPS to meet the required parameters as accurately as possible, the following factors must be considered:

• Nominal and starting electrical power of the boiler. To determine this parameter, it is necessary to study the equipment passport. It should be noted that when starting the entire system, a starting current must be supplied, the value of which is 2.5-3 times greater than normal. To a greater extent, this applies to circular pumps, as they are the main consumers of energy in boilers. i.e. if the pump power is 200 watts, then the UPS must supply at least 600 watts to the system.
• The shape of the output voltage. Due to the design feature of the gas boiler, a sinusoidal voltage must be applied at the input. UPS with square wave output voltage are not suitable for boilers. When they work together, extraneous noise may appear in the pump - buzzing.

Currently, there are 2 types of uninterruptible power supplies that can be connected to heating boilers:

Standby (off-line) scheme

This is the simplest design of an uninterruptible power supply. Connected to the boiler and the mains, the device passes voltage through itself without changing its parameters. In the event that the indicators go beyond the norm (decrease), an automatic unit is turned on, which converts the constant low-voltage voltage from the batteries into the required 220 V.

Advantages:

• Simplicity of design, resulting in a relatively low price.
• In transmission mode, it consumes a small amount of electricity.

Flaws:

• There are no mechanisms for damping power surges.
• When switching from standby to operating mode, there is some time delay that may affect the operation of the boiler - automatic shutdown.

Line-interactive scheme

To solve the problem of normalizing the mains voltage, interactive UPSs are produced, the design of which, in addition to inverters, includes a stabilizing unit. The principle of operation of the stabilizer may be to use an autotransformer operating on a relay circuit or using a servo servo.

The advantages of this type of device lies not only in the supply of energy in the event of a shutdown of the main source, but also in the protection of the electronic component of the boiler from power surges.

When choosing a UPS, you should also consider its battery life. Many devices require an external battery connection. Their number depends on the power consumption of the boiler and the operating time without the use of a permanent power supply.

Manufacturers, prices

Many manufacturers of electronic equipment are engaged in the production of uninterruptible power supplies for boilers. Among them, it is worth highlighting the following companies and models.

Ariana

This manufacturer offers several UPS models that differ in functionality and technical parameters.

AK-500. line-interactive. The scheme of this block allows the boiler to be powered both from the network and from autonomous sources (batteries, diesel generators, etc.).

Specifications:

1. Load power - 500 watts.
2. The input voltage is up to 300 V.
3. Input voltage from external power sources - 14 V.

The cost of AK-500 ~ 6800 rubles.

General Electric

The products of this American company are distinguished by the best parameters for fine-tuning the operation of the UPS to stabilize the voltage. This is necessary for boilers with sensitive electronics. For small and medium power heaters, the best choice is the model: EP 700 LRT.

The design of this model has a double converter - for voltage and signal frequency. This allows you to completely protect the boiler from unforeseen surges in the power grid.

Specifications:

1. Load power - 490 watts.
2. The input voltage is up to 300 V.
3. Input voltage from external power sources - 14 V.
4. Output voltage - 220/230/240V±2%

The cost of this model is ~ 13,200 rubles.

The above devices are among the most popular and popular UPS on the market. But besides them, there are also other manufacturers - Rucelf, Luxeon, Vir-Electrik, etc. The choice of this equipment should be based on indicators of quality, degree of functionality and cost of the device.

As for another important component for the boiler - the thermostat. then read about it here.

Online UPS

All those disadvantages that are present in the first two positions are completely absent in online models. That is:

• There is a transition from alternating current to direct current, regardless of the voltage in the network.
• The output is a nominal stabilized alternating voltage.
• Perfectly combined with any generators.

But it should be noted that these devices are very complex in terms of their constructive content, hence, in principle, the high price of the product.Therefore, their purchase will have to be correlated with the quality and price of gas heating equipment, in which very sensitive devices are installed (control, accounting, settings, and so on). that is, for such devices you need an accurate stabilized voltage. No jumps and incorrect operation, which can lead to failure of all gas boiler systems.