Drazice OKC 200 NTRR/SOL Manuel d'utilisation et d'installation - Page 4
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1 PRODUCT TECHNICAL SPECIFICATION
1.1 FUNCTION DESCRIPTION
The OKC 200, 250, 300 NTRR/SOL hot water tanks are designed and manufactured as a part of a solar system
containing additional integral elements of the system, such as sun collectors and their roof holders (flat roof
stands), expansion tank, collector filling distribution and other items necessary for proper and trouble-free
function of a solar system.
Their nominal performance provides sufficient amount of hot water for flat units, premises, restaurants, and
similar establishments.
For final heating (reheat) of HSW, electricity, various types of central heating boilers and combination
of those can be chosen.
1.2 PRODUCT DESCRIPTION
OKC NTRR/SOL
- stationary tank with two spiral heat exchangers for heating of HSW with heating
water from two sources. Reheat can be carried out by boiler in the top exchanger and
also by electric heater TJ 6/4".
The tank receptacle is welded from a steel plate; 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 tank and in the side flange to adjust the electric potential inside the
receptacle, thus reducing the risk of corrosion. This anode can be exchanged with titanium anode which is
fed with electricity and is stable (it need not be exchanged after two years of the tank's operation as the
magnesium anode). All types have the outlets of hot and cold water and a circulation opening welded to
them. The receptacle is insulated with polyurethane foam of 50 mm thickness. The tank shell consists of
plastic container, the connecting parts are metal coated. The entire tank stands on three rectification screws
with a possibility of levelling floor unevenness within the range of 10mm. Under the plastic cover on the side
of the 300 litre tank, there is a cleaning and revision opening ended with a flange. Both NTR and NTRR series
heaters are equipped with a 6/4" aperture for in-screwing an additional heating element of TJ 6/4" series.
The tank is placed on the ground, next to the heating water source, or in its vicinity.
All connecting distributions must be properly insulated from heat.
The OKC 200 – 300 NTRR/SOL tanks are indirect tanks designed for preparation of hot sanitary water
by means of solar system.
The NTRR version is equipped with two exchangers for an optional combination of a solar system
and an additional indirect circuit (e.g. gas boiler). A heating element can be mounted, as well.
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