Recently, gas boilers have become increasingly popular, they serve to receive hot water and heat the home. As an example of such equipment, we can consider the models of the manufacturer "Bosch", which have proven their reliability, durability and high performance.
Reviews on the boiler of the brand Bosch ZWA 24-2 K
This Bosch gas boiler, the cost of which is 29,600 rubles, is a wall-mounted equipment used not only to provide heating, but also hot water. The unit has an open combustion chamber, and the small size of the housing simplifies installation in a limited space.
Users like the presence of an external control panel, with which you can easily adjust the parameters of the equipment. The device has a bithermic heat exchanger, which is a pipe-in-pipe design. Users especially note the presence of a frost protection system that can extend the life of the device. High quality heating is ensured according to the 2 star standard according to European standards. The same applies to the hot water standard.
Comfort of use
All users who have already managed to test the quality of the described equipment, emphasize that during its operation there is a fairly low noise level, which is only 39 dB. Fast heating of water is ensured by the innovative QuickTap system.
Technical Specifications Reviews
The Bosch gas boiler described in the article has unique technical characteristics. For example, users especially note a sufficiently high power for such equipment, which is 24.4 kW. Liquefied gas is consumed to a minimum. In an hour, this figure reaches only 1.88 kg. The heating temperature is quite impressive, according to customers, and is 85 ° C. If you need hot water, then its performance will be impressive. In one minute you can get 17.1 liters if the temperature is 20 ° C, and 6.84 liters at a temperature of 50 ° C.
Power consumption is 130 watts. Buyers emphasize that you can install the equipment on the wall yourself, because its weight is only 33 kg. The maximum heat input in kilowatts is 25.7. In an hour, the maximum consumption of natural gas will be 2.52 m 3 . When consumers purchase the Bosch wall-mounted gas boiler, they emphasize that they like a wide range of hot water temperatures, which range from 40 to 60 ° C, which increases the comfort of use. The volume of the expansion tank is 8 liters.
Extra features
You can count on the safety of use, because the manufacturer took care of the protection. The device belongs to the X4D class. Before purchasing the unit, they should ask what its dimensions are, because sometimes you have to install the device in cramped conditions. Case dimensions are 750 x 400 x 355 mm.
Common error codes and troubleshooting
The Bosch double-circuit gas boiler described in this article may encounter some problems during operation. You can find out about them by looking at the display. For example, an A7 code will indicate a malfunction in the hot water temperature sensor. You can fix the problem by checking the wires and the temperature sensor. If you notice damage or short circuit, there the elements can be replaced. When the connection is interrupted by the BUS bus, the equipment issues an A8 code. You can fix the problem by checking the controls and the connecting cable.
If it happened that during installation the hot water temperature sensor was incorrectly installed, then you will see code A9 on the display. In this case, you can check the installation area, and if necessary, remove the sensor and reinstall it using heat-conducting paste. The Bosch gas boiler, whose operation errors are displayed, sometimes faces the fact that the equipment does not detect the boiler sensor. You can find out about this by the Ad code. In this case, check the connection cable and the boiler sensor. When no coding plug is detected, you will see b1 on the display. In this case, the coding plug must be inserted correctly, measured, and if necessary, replaced. If during the operation of the equipment the differential pressure switch opens, then you can find out about this by the designation C1 on the display. The differential relay must be checked, as well as the exhaust device, as well as the connecting pipes.
User's manual
The Bosch gas boiler, the instructions for use of which should be studied by you before starting the installation of the equipment, should work without emitting flue gases. If you notice their smell, then immediately turn off the device, open the windows and doors, and then notify the specialists of an authorized company.
Flammable materials such as solvents, paper or dyes should not be stored or used near the appliance. Air pollution for burning gas is unacceptable. This eliminates corrosion. That is why air must be freed from aggressive substances like fluorine or chlorine compounds, as well as halogenated hydrocarbons. The device must be installed exclusively in closed heating and water heating systems. Other use is misuse.
Installation Recommendations
If the Bosch gas boiler, which reviews are often the most positive, will be installed in a special cabinet, then the need for a minimum distance and ventilation holes should be taken into account. During operation, the surface of the device will heat up to 85 ° C or less. Therefore, the protective measures provided for building materials and furniture should be observed. During installation, it is recommended to install an electromagnetic valve, due to which the supply of liquefied gas will be open only upon request for heat.
When the Bosch gas boiler will be installed, the reviews of which you could read above, it will be necessary to fix the mounting template to the wall, observing the minimum side distances of 10 mm. The holes for the hooks on the screws should be made so that their diameter is 8 mm. If necessary, make a hole in the wall for the flue gas exhaust system. The hooks from the kit are fixed with dowels. The mounting plate is secured with the mounting hardware that comes with the kit.
When the Bosch gas boiler is installed, the reviews of which are only positive, it is necessary to use a pipe connection that is designed for a pressure of 3 bar. As for the hot water circuit, the elements must undergo a pressure of 10 bar. It is important to install a gas valve so that it is possible to empty and fill the system. It should be located at the lowest point. The air outlet valve should be at the highest point.
Conclusion
The Bosch gas boiler, reviews of which may allow you to make the right choice, sometimes issues an internal malfunction code. At the same time, the consumer must check how firmly the connection of the plug contacts and start lines is. The electronic board is replaced if necessary. If, after turning off the gas supply, the flame still burns, then check not only the gas fittings, but also the ionization electrode.