Drazice NADO 500/300 v1 Fiche technique
OPERATING AND
INSTALLATION MANUAL
Accumulation Tank
NADO 500/300 v1
NADO 750/250 v1
Družstevní závody Dražice - strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
Phone.: +420 /326 370 990
Fax: +420 / 326 370 980
E-mail: expor[email protected]
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CONTENTS
1 DESCRIPTION ............................................................................................................................................. 4
2 THE DESIGN OF SUITABLE VOLUME AND TANK INSTALLATION................................................................ 4
3 TECHNICAL PARAMETERS.......................................................................................................................... 5
4INFORMATION SHEET................................................................................................................................ 5
5 DIMENSIONS AND CONNECTION .............................................................................................................. 6
6DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT.............................................. 8
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PRIOR TO THE INSTALLATION OF THE TANK, READ CAREFULLY THIS MANUAL!
Dear customer,
The Works Cooperative of Dražice - Machine Plant, Ltd., would like to
thank you for your decision to use a product of our brand.
The manufacturer reserves the right for engineering modification of the product. The product is designed
for permanent contact with drinkable water.
It is recommended to use the product in indoor environment with air temperatures from +2°C to 45°C and
a relative humidity up to 80%.
Product’s reliability and safety is proven by tests implemented by the Engineering Test Institute in Brno.
Made in the Czech Republic.
Meaning of pictograms used in the Manual
Important information for heater users.
Abiding by the recommendations of the manufacturer serves to ensure trouble-free operation
and the long service life of the product.
Caution!
Important notice to be observed.
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1DESCRIPTION
Accumulation 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 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 an accumulation 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 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
100 m thick insulation - polyurethane foam (foam rubber) 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 accumulation tank which is
enabled by a TJ 6/4“ series electric heating unit. In the standard version, the flange is blinded.
2THE DESIGN OF SUITABLE VOLUME AND TANK
INSTALLATION
An ideal size of the accumulation 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 accumulation 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 accumulation
tank. No pressure grow in the accumulation 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!
No stop fitting can be put between the security fitting of the heating circuit and the accumulation tank!!!
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Connection of the inner tank to HSW must comply with \u268 CSN 06 0830, a safety valve has to be fitted on
the cold water inlet.
It is necessary to activate the heating circuit and remove potential impurities that are captured
in the filter; after that the system is fully functional.
3TECHNICAL PARAMETERS
NADO 500/300 v1 NADO 750/250 v1
TANK CAPACITY [l] 475 772
INNER TANK CAPACITY [l] 279 260
WEIGHT [kg] 153 180
MAXIMUM TANK PRESSURE [MPa] 0,3 0,3
MAXIMUM PRESSURE OF THE INNER ACCUMULATOR
[MPa] 0,6 0,6
40°C HOT WATER YIELD AT 53
℃
WATER TEMPERATURE
IN THE TANK INLET WATER 15°C /HW FLOW RATE
[l/(l/min)]
*260 / 10 490 / 10
40°C HOT WATER YIELD AT 80
℃
WATER TEMPERATURE
IN THE TANK INLET WATER 15°C /HW FLOW RATE
[l/(l/min)]
*650 / 10 1170 / 10
MAXIMUM TEMPERATURE OF WATER IN THE TANK AND
ACCUMULATOR [°C] 90 90
MAXIMUM OUTPUT OF EL. HEATING ELEMENT OF TJ
6/4" SERIES [kW] 1x9 (2x4.) 3x9
* value stated by calculation
4INFORMATION SHEET
NADO 500/300 v1 NADO 750/250 v1
ENERGY EFFICIENCY CLASS BC
STATIC LOSS [W] 80 117
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5DIMENSIONS AND CONNECTION
NADO 500/300v1
G 1 1/4" inner
G 1/2" inner
G 1" outer
G 3/4" outer
G 1 1/2" inner
B C d E F G H I J L Lk
245 1524 650 484 584 1036 1691 1532 327 1821 1841
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NADO 750/250v1
G 1 1/4" inner
G 1 1/2" inner
G 1" outer
G 3/4" outer
Sensor well
Φ 15x2-150
A B C d E F G I J K M N O P Lk
90 268 615 750 821 1643 268 615 1060 1553 465 525 585 342 2040
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Thermal insulation
Polyester sheet of 100 mm thickness. It consists of an
upper cover, flange cover and hole caps. Insulation is
supplied in a separate packaging.
We recommend that the insulation was fitted at room
temperature. At temperatures significantly below 20°C
the insulation shrinks. This disables its easy fitting.
6DISPOSAL OF PACKAGING MATERIAL AND
NON-FUNCTIONING PRODUCT
A service fee for providing return and recovery of packaging material has been
paid for the packaging in which the product was delivered. The service fee was
paid pursuant to Act No 477/2001 Coll., as amended, at EKO-KOM a.s. The client
number of the company is F06020274. Take the water tank packages to a waste
disposal place determined by the municipality. When the operation terminates,
disassemble and transport the discarded and unserviceable heater to a waste
recycling centre (collecting yard), or contact the manufacturer.
3-10-2017
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