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4
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1
TECHNICAL SPECIFICATION OF PRODUCT
1.1
FUNCTION DESCRIPTION
Thanks to their construction
and number of variants, the
OKC 1
6
0
–
300
series water heaters 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.
1.2
PRODUCT DESCRIPTION
The heater tank 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.
For additional corrosion protection a magnesium anode is
mounted in the upper part of the heater to adjust the electric potential inside the tank, reducing the risk of
corrosion. All types have the 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 heater shell consists of a steel,
powder
-
paint coated, sheet; the connecting parts are metal coated. The entire heater stands on three
rectification screws with a possibility of levelling floor unevenness within the range of 10 mm. Under a
plastic cover on the side of the heater, there is a cleaning and revision opening ended with a flange;
various
performance heating units may be mounted into the opening.
The NTR and NTRR series heaters from 200
litre volume are equipped with a 6/4“ aperture for in
-
screwing an additional TJ heating element. Such
version is used when the heater is connected to either a solar system or a system with a heat pump, to
reheat water in the upper part of the heater to the temperature required. The heater is to be placed on the
ground. The tank is tested with pressure of 0.9 Mpa, heat exchanger with 1.5 Mpa.
The NTR version has a heat exchanger located in the bottom part of the heater, and one heating water
source is used for heating.
The NTRR version is equipped with two exchangers for an optional combination of two heating water
sources; both exchangers can be combined in a series. The NTR/BP and NTRR/BP series do not have a
heating element. Heater cannot be used for flow heating of hot water in an exchanger.
