One heating device is absolutely not enough! What is good about a gas boiler with a water heater
A boiler is a special device that allows heat a given amount of water to a certain temperature.
There are indirect type units, heated by any heat carrier, flow-through or storage electric and gas models. According to the mounting method, boilers are divided into wall-mounted and floor-mounted.
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Types of heating boilers: floor-standing, wall-mounted, condensing and others
Gas boilers are divided into several varieties:
- By installation type: floor and wall models. The first are installed directly on the floor, the second are mounted on the wall.
- By fuel use method: convection and condensation. The coolant in convection boilers is heated by the heat generated from burning gas. Condensation models are equipped with a secondary heat exchanger, allowing for the extraction of additional volumes of thermal energy.
- By type of air draft: with natural and forced draft.
Combined operation of a boiler and an electric or gas boiler. Types of devices for hot water
To simultaneously heat the room and heat the water, they often use system, consisting of a gas boiler and a water heater.
Flow-through, dimensions of the device
This device (otherwise known as a gas water heater) is a device for instantly heating water. Cold water from the supply system is piped into a copper heat exchanger, which in turn is heated by gas.
Flow-through structures are divided into two types: with an open combustion chamber and with a closed one. An open burner differs from a closed one in that air is supplied to it by a fan. The column device includes:
- water knot;
- gas valve;
- burner;
- ignition system;
- igniters;
- flame presence sensor;
- temperature sensor;
- draft sensor;
- safety relief valve;
- temperature controller;
- flow regulator;
- gas, water and chimney connection pipes.
The purpose of instantaneous water heaters is to quickly heat a large amount of running water, and this is what determines operating principle of the devices:
- The burner lights up from the pilot light at that moment, when the tap opens with hot water. The so-called frog (water unit) is triggered and the gas valve supplies gas to the burner.
- At this time the burner is ignited and thus heats up a copper heat exchanger wrapped with a coil tube. Water passes through it, receiving heat from the burner. After that, the hot water goes to the tap.
- After closing the tap water unit mechanically closes the valve, which stops the gas supply and the heater switches off.
Reference. There are two systems for igniting columns: manual and automatic. With the first type of control, a spark on the igniter is created by a piezoelectric element, and with the second, ignition occurs automatically when the hot water tap is opened. More expensive models of heaters are equipped with automatic systems.
According to their technical characteristics, gas flow boilers are divided into low-power ones - from 17 to 20 kilowatts, average - 20-26 kilowatts and big ones - from 26 to 28 kilowatts. This indicator determines the volume of hot water in the tap. A low-power boiler is enough for a shower and washing dishes.
If you also intend to connect a washing machine, choose a device with medium or high power.
Modern gas water heaters are neat and compact. Standard size — 700x450x250 mm, but there are also devices with other parameters, for example, 760x350x250 mm or 655x350x220 mm.
Features of operation:
- Try to set a comfortable temperature initially, it is usually within the range 45-60 degrees - this will protect against excess scale deposits in the heat exchanger.
- Perform a full check periodically prevention equipment (approximately once a year).
Attention! Trust the setup work and preventive measures only for professionals.
Built-in storage and other boiler devices
Heating boilers with boilers have the same basic components and differ only in details. They consist of a heat-insulating body, inside which there is a heat exchanger, a burner and automatics. The device circuit can provide both electric and piezo ignition.
Photo 1. Diagram of the internal structure of a gas boiler with a built-in boiler for heating water.
Boilers indirect heating, used in gas boilers, use different heat sources. There are boilers equipped with electrical heating elements. If the unit breaks down or there is no gas, the water is heated by electricity. The principle of operation of such a device is as follows: water passes through the coil (it is placed in a steel cartridge) and is heated to the desired temperature.
Reference. The technical characteristics of direct heating boilers are different, the power of water heaters varies from 25 to 65 kilowatts.
Basically, in double-circuit gas boilers there is a built-in boiler on 80-100 liters. In the case of a single-circuit and additional boiler, the design takes up much more space. Modern manufacturers are trying to reduce the size, but these units will not fit into a small kitchen.
Important! To install gas equipment, you need to get special permission.
Useful video
Watch the video, which tells about the easiest way to connect a gas boiler and water heater.
Boiler with gas boiler - practical and cheap
Gas boilers with instantaneous water heaters and boilers are an affordable way to provide yourself with heating and uninterrupted supply of hot water.
The most economical is a gas water heater, while boilers take up more space. If you have chosen a double-circuit boiler, you need to understand that if one part breaks, the device will stop functioning, which means there will be no hot water or heating.
Comments
But the boiler still has a number of advantages even over a dual-circuit boiler. One day, the burner in my boiler started acting up and as a result we were left without hot water, although the washing machine still works, since it heats the water itself, and there was no hot water for other needs until a specialist came and repaired the boiler. If there had been a boiler, we would not have even noticed the boiler repair, because the boiler would have heated our water using electricity.