April, 2010:

Gas tankless water heaters of Takagi hard provide modern man, who humbled himself to the fact that in his house or city apartment there is no hot water. There are many types of water heating devices, which use different energy sources. However, if a country house or apartment is brought pipeline gas, the most economical and reliable way to ensure hot water is to install a gas instantaneous water heaters – gas heater. The principle of the gas column is well known, and is based on the burner flame heating the water flowing through the heat exchanger column. At the column inlet water from water supply, and the output, divorced from the points of water consumption – sinks, washbasins, etc. Stack gases from the combustion gas discharged into the vapor pipe – chimney, and the oxygen needed for combustion is provided by natural ventilation. However, column C-125 does not need a chimney. For her, both for household gas stoves, it is sufficient availability of natural ventilation.

The most important for the consumer technical characteristic of the gas column is the performance of hot water. Productivity is measured in liters per minute and is tied to the parameter, which is denoted delta T (delta T). Delta T – is the amount by which increases the temperature of tap water after the heat exchanger in the column. For example: the performance of the Takagi gas tankless water heaters  is 6 l / min at delta T = 25 ° C. This means that the water temperature at the entrance columns, for example, +15 ° C, its outlet temperature is 15 ° +25 ° = 40 ° C if water flow is 6 l / min. With increasing consumption of water, its temperature drops, and a decrease – increase. For a shower, a comfortable water temperature is 38 ° -42 ° C, and its flow rate 8-10 l / min. Water consumption for washing and the washbasin was adopted 4-5 l / min. With simultaneous operation of several consumer value added costs.

The greater the net power of the Takagi gas tankless water heaters , the greater the productivity of hot water it provides. The range of Takagi gas tankless water heaters  invites speakers with useful capacity from 5 to 24,4 kW and with a capacity of 5 to 14 l / min.

Gone are the days when the gas column fueled matches. Recent speakers have piezo-electric ignition or. To include these columns, just click the button on the case. Water heaters  with automatic electric ignition start themselves when you open the faucet of hot water. (To supply electrical ignition device rather ordinary batteries). The model number of Takagi gas tankless water heaters  of all listed species ignition. Models of gas columns Demrad c subscript S on the label, have manual restrictor flow rate, with which you can set the desired temperature of water exiting the column. Also, all models are equipped with an index of S modulated burner, which automatically maintains a constant temperature of water exiting the column with the change, within certain limits of its consumption.

A well-known shortcomings of Seattle gas networks is unstable gas pressure in them. Gas water heaters Demrad adapted to such surprises. They work steadily, even when the gas pressure at the inlet burner 60-70 mm water column, which is 50% below nominal. A unique feature of the gas column Demrad, is a low minimum permissible value of water pressure at the inlet. For all models, it is 0.1 atm.

All gas water heaters Takagi have perfect security system that protects them from overheating, water cycle, from the uncontrolled growth of pressure from the lack of draft in the chimney, from the proceeds of gas without combustion, etc.

If desired, columns can be configured to run on LPG.

Depending on the purpose of flow EVN, you will need different amounts of hot water. For example, the washbasin requires about 1,8-2 l / min, for the soul – about 4 l / min, combined models, from 4 l / min. In line with this, must be chosen, and the power unit. Based on years of experience, manufacturers recommend the following capacities:

* For the washstand: 3-6 kW;
* For the soul: from 7 kW;
* Combined: 8 kW.

Help the gas tankless water heater is better to work!

It is clear that for normal speakers, it is necessary to provide the necessary pressure, not only in gas, but also in the water supply network. What to do if this pressure is too low. In this case, can help a special pump to increase pressure. In particular, such a device produces one of the leading manufacturers of pumping equipment – Danish company Grundfos. The model of the pump to increase pressure, called UPA. It is very compact and is lightweight (2.5 kg), which allows it to mount directly on the pipeline.

The design of this taco pump (taco 007) is quite simple and, hence, reliable. It consists of a body in which the rotor with the impeller mounted on it. Grundfos UPA refers to the type of pumps, which are called pumps with wet rotor. Lubrication of the pump is pumping water. Also, the water acts as a cooling. It is clear that this should be provided with a continuous circulation of water through the pump casing. As the dignity of pumps with wet rotor, it is worth noting the absence in their designs moving seals between the rotating shaft of the electric motor and a fixed body. In addition, the use of wet rotor provides a near silent pump. Due to this, Grundfos UPA does not disturb your comfort, it can be installed anywhere in your house or apartment. If we talk about installing the pump, it is important to observe the mandatory requirement – its shaft must always be in a horizontal position.

Do not think that if the pump is very small dimensions, it has, and small features. On the contrary, the pump Grundfos UPA-120 has a flow of 3 m cube. / H and pressure up to 12 m.

A few words about the management of the pump. Grundfos UPA switch equipped with three provisions:

* Manual mode. In this mode, you can turn on and off the pump when you need it;
* Automatic mode, in which the pump automatically switches on and off, with built-in sensors, ie, when you open or close the valve;
* Pump is turned off.

It should be borne in mind that each pump must be protected from running dry. Dry progress occurs in situations where the pump is running, but water in it at this point does not exist. The result can be damage to the bearings. Grundfos UPA pumps are protected from running dry, which is provided by a built-in sensors.