Drazice OKC 200 NTRR / BP Manual de operação e instalação - Página 14

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Drazice OKC 200 NTRR / BP Manual de operação e instalação
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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