Drazice OKC 160 NTR / BP Operation And Installation Manual - Page 12

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Drazice OKC 160 NTR / BP Operation And Installation Manual
the stop valve on the inlet to the exchanger has to be closed, which prevents heating water in the hot
water heating system.
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 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 (Fig. 1) as needed, in particular before the
beginning of the heating season (figure 3). The time it takes to heat up 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.
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.
Figure 5
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