Drazice OKCE 125 NTR Operating And Installation Manual - Page 4

Browse online or download pdf Operating And Installation Manual for Water Heater Drazice OKCE 125 NTR. Drazice OKCE 125 NTR 17 pages.

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1 TECHNICAL SPECIFICATION OF PRODUCT

Thanks to their construction and number of variants, the OKCE 100, 125 NTR series storage tanks enable

economic preparation of hot service water (HSW) by means of various power sources. Their nominal

performance provides sufficient amount of hot water for flat units, premises, restaurants, and similar

establishments. For HSW reheat, electricity, various types of central heating boilers, recoverable energy

sources (heat pumps, solar collectors) and combination of those can be chosen.

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 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.

The storage tank vessel is welded from a steel sheet; the exchangers from a steel tube and, as a unit, it is

entirely coated with hot water resistant enamel. A flange is welded onto the upper bottom of the

receptacle with a flange lid screwed to it. A sealing ring is inserted between the flange lid and the flange.

Thermowells for placing a heating element and sensors of regulation thermostat and safety fuse are

located in the flange lid. Electric wiring is placed underneath the plastic removable cover. The temperature

of water can be set using the thermostat.

For additional corrosion protection a magnesium anode is mounted in the upper part of the storage tank to

adjust the electric potential inside the tank, reducing the risk of corrosion. The storage tanks have outlets of

hot and cold water and a circulation opening welded to them. The tank is insulated with polyurethane foam

of 40 - 65 mm thickness. The storage tank shell consists of a steel, powder-paint coated, sheet; the

connecting parts are metal coated. The entire storage tank stands on three rectification screws with a

possibility of levelling floor unevenness within the range of 10 mm. The storage tank is to be placed on the

ground. The tank is tested with pressure of 0.9 MPa, heat exchangers with 1.5 MPa.

The NTR version has a heat exchanger located in the bottom part of the storage tank and one heating water

source is used for heating.

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