Drazice NADO 500/300 v1 Operating And Installation Manual - Page 4
Browse online or download pdf Operating And Installation Manual for Storage Drazice NADO 500/300 v1. Drazice NADO 500/300 v1 8 pages. Storage tanks
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1 FUNCTION 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 tanks serve accumulation of heat in the heating system and allow heating or preheating
of HSW (Hot Service Water) in an inner tank. 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 are made of steel, without any inner surface treatment, the outer surface of the tank is provided
with a protective paint. The tanks are manufactured in 500 and 750 litre volumes. Individual versions
are additionally equipped with an inner accumulator of 300 and 250 litre volumes, and funnels G1½" mm,
with a possibility to install an electric heating element of TJ 6/4" series. The tanks are equipped
with a removable 80 mm thick insulation and a lock.
The NADO type enables direct heating of HSW (Hot Service Water) in an inner accumulator or preheating
of water for another water heater. Connection to a boiler usually allows direct HSW heating in an inner
accumulator to the desired temperature whilst, on the contrary, connection to solar collectors or to a heat
pump only preheats HSW and this tank can be connected to e.g. an electric heater to complete heating
of the water to the desired temperature, or an electric reheat can be fitted in the storage tank which
is enabled by a TJ 6/4" series electric heating unit. In the standard version, the flange is blinded.
2 THE DESIGN OF SUITABLE VOLUME AND TANK
INSTALLATION
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).
When putting into operation, water has to be filled first into the inner tank 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 tank may get permanently
damaged!
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