Drazice NADO 1000/200v7 Manual de operação e instalação - Página 2
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1. Description
Storage tanks serve accumulation of excessive heat from its source. The source may be a solid fuel
boiler, heat pump, solar collectors, fireplace inserts, etc. Some types of storage tanks allow
combination of connecting even multiple sources.
The NADO type storage tanks serve accumulation of heat in the heating system and allow heating
or preheating of HSW (Hot Service Water) in an inner vessel. Incorporation of a storage tank in the
heating system with a solid fuel boiler allows an ideal run of a boiler at favourable temperature during
the boiler operation. The main benefit lies in the period of optimum operation (i.e. with maximum
efficiency) when the excessive unconsumed heat accumulates in the storage tank.
The tanks and tubular exchangers are made of steel, without the inner surface treatment, the outer
surface of the tank is provided with a protective paint. The storage tanks are manufactured in 500, 750
and 1000-litre volumes. The 500-litre version is additionally equipped with a tubular exchanger of
2
2.5m
surface and the 750 and 1000 litre version with a tubular exchanger of 3.3 m
funnels G1½" mm, with the possibility to install an electric heating element of TJ 6/4" series with an
extended cooling compartment, up to 6 kW.
The NADO type enables direct heating of HSW (Hot Service Water) in an inner enamelled tank,
or preheating of water for another water heater. Connection to a boiler usually allows direct HSW
heating in an inner vessel to the desired temperature whilst, on the contrary, connection to solar
collectors or heat pump only preheats HSW and another, e.g. electric, heater has to be used, in order to
reheat the water to the desired temperature, or final electric reheat has to be fitted in the storage tank
which is enabled by a TJ 6/4" series electric heating unit with an extended compartment of up to 6 kW
output.
2. Designing the size and connection of storage tank to the heating system
An ideal size of the storage tank is designed by a design engineer, or a person sufficiently qualified to
design heating systems.
Product assembly must be implemented by an authorised person (confirmed in the warranty
certificate).
Important: When putting into operation, water has to be filled first into the inner vessel for
HSW and the operating pressure inside it has to be kept, only then heating water can be filled
into the outer storage tank, otherwise the product may get damaged!
The manufacturer explicitly emphasises the necessity of being particular in testing the tightness
of the heating circuit (radiators, piping joints, floor heating, etc.) with the connection of the
storage tank. No pressure grow in the storage tank heating water compartment may occur above
the maximum operating pressure of 0.3 MPa, if the heating system is pressurised to higher than
the maximum operating pressure, the inner enamelled vessel may get permanently damaged!
No stop fitting can be put between the security fitting of the heating circuit and the storage
tank!!
2
2
surface and two