Drazice OKC 200 NTRR / BP Посібник з експлуатації та встановлення - Сторінка 14

b) Service water heating via thermal energy through heat exchanger

Closing valves of the heat exchanger must be opened which ensures heating water flow from the hot water

heating system. Together with a closing valve, it is recommended to install an air outlet valve at the inlet to

the heat exchanger in order to bleed the heat exchanger (Figure 6) as needed, in particular before the

beginning of the heating season. The time of heating using the heat exchanger depends on the

temperature and flow of water in the hot water heating system. A combined heater is made in universal

design – depending on the need of connecting the closing valves to the heating element either from the

right, or from the left (Figure 6).

It is recommended to install stop valves on the heating water inlet and outlet (for

possible dismantling of the heater). The valves have to be as close to the heater as

possible to avoid higher thermal losses.

2.6 FIRST HEATER COMMISSIONING

After connecting the heater to the water supply, the hot water heating system, the

electric network, and after testing its safety valve (based on the valve manual attached),

the heater may be put into operation. Before opening the power supply, the tank must be

filled with water. The process of first heating must be executed by licensed professional who

has to check it. Both the hot water outlet pipe and safety armature parts may be hot.

Figure 6

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