Drazice NADO 300/20v11 Specification sheet

OPERATING AND
INSTALLATION MANUAL
STORAGE TANKS
Družstevní závody Dražice-strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 911
fax: +420 / 326 370 980
e-mail: expo[email protected]z
NADO 300/20v11
NADO 400/20v11
NADO 750/25v11
NADO 1000/25v11

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CONTENTS
1FUNCTION DESCRIPTION ........................................................................................................................... 4
2THE DESIGN OF SUITABLE VOLUME AND TANK INSTALLATION................................................................ 4
3 TECHNICAL PARAMETERS.......................................................................................................................... 5
4IMPORTANT NOTICES ................................................................................................................................ 6
5 TECHNICAL DESCRIPTION .......................................................................................................................... 7
6DIMENSIONS AND CONNECTION .............................................................................................................. 8
7DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT............................................ 10

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CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE TANK!
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 product is not intended to be controlled by
a) people (including children) with reduced physical, sensual or mental capacities, or
b) people with insufficient knowledge and experiences unless supervised by responsible person,
or unless properly instructed by such responsible person.
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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1FUNCTION 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 stainless 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 storage tanks are manufactured in 300, 400, 750 and 1000-litre volumes. 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. Individual versions are additionally equipped with a tubular exchanger and a buried
stainless exchanger of 20 and 25 litre volumes, and two funnels G1½“ mm, with the possibility
to install an electric heating element of TJ 6/4“ series with an extended cooling compartment. The storage
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 a stainless exchanger, or its preheating
for another water heater. Connection to a boiler usually allows direct HSW heating in an inner stainless
exchanger 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 complete heating
of 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.
2THE 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 authorized 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 emphasizes 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 pressurized to
higher than the maximum operating pressure, the inner enameled tank may get permanently
damaged!
No stop fitting can be put between the security fitting of the heating circuit and the storage tank!!!

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3TECHNICAL PARAMETERS
* value stated by calculation
Table 1
NADO
300/20v11
NADO
400/20v11
NADO
750/25v11
NADO
1000/25v11
STORAGE TANK CAPACITY l320 405 772 999
INNER TANK CAPACITY l20 20 23 23
WEIGHT kg 106 122 165 197
HEATING SURFACE OF THE
STAINLESS EXCHANGER m24,5 4,5 6,25 6,25
MAXIMUM PRESSURE bar 3 3 3 3
MAXIMUM PRESSURE OF
STAINLESS EXCHANGER bar 6666
MAXIMUM TEMPERATURE OF
WATER IN THE TANK °C 90 90 90 90
MAXIMUM TEMPERATURE OF
WATER IN THE EXCHANGER °C 90 90 90 90
AMOUNT OF HOT WATER AT
40°C AT WATER TEMPERATURE
OF 53°C IN THE STORAGE TANK
/HW FLOW RATE
l/(l/min) *210 / 10 *220 / 10 *240 / 10 *260 / 10
AMOUNT OF HOT WATER AT
40°C AT WATER TEMPERATURE
OF 80 IN THE STORAGE TANK
/HW FLOW RATE
l/(l/min) *520 / 10 *540 / 10 *610 / 10 *650 / 10
MAXIMUM OUTPUT OF EL.
HEATING ELEMENT OF TJ 6/4"
SERIES
kW 1 x 6 1 x 6 1 x 12 1 x 12
ENERGY EFFICIENCY CLASS C C C C
STANDING LOSS W97 113 114 148

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4IMPORTANT NOTICES
We recommend to start up the heating circle before commissioning and to clean possible dirts
caught in the filter and after this the system would be fully functional.
Recommended operating pressure of hot water circle is 0.4 MPa. We recommend installing
return valve and an expansion vessel (min. 4 % of hot water in pipeline) on hot water outlet
to eliminate back pressure impacts.
The reservoir is possible to use only in compliance with conditions stated on performance plate
and with instructions for wiring. It is also necessary to observe terms for connection stipulated
by some local electrical and water companies as same as manual for assembling and operation
besides statutory accepted national regulations and standards.
Shut down the reservoir cold water intake if you are not using the reservoir for longer
than 24 hours or if the object with the heater is without presence of any person.

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5TECHNICAL DESCRIPTION
NADO 300/20v11, NADO 400/20v11
Figure 1
NADO 750/25v11, NADO 1000/25v11
Figure 2

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6DIMENSIONS AND CONNECTION
NADO 300/20v11, 400/20v11
Figure 3
Table 2
①G 1 1/4" inner
②G 1" outer
③G 1/2" inner
④G 1 1/2" inner
⑤G 1 1/4" outer
NADO A B C d D F G I J K L Lk M N P Q
300/20 v11 90 248 726 550 670 1448 340 1308 1448 468 1702 1821 1358 1448 626 826
400/20 v11 90 248 818 550 670 1648 340 1508 1648 468 1902 2010 1558 1648 718 918

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NADO 750/25v11, 1000/25v11
Figure 4
Table 3
①G 1 1/4" inner
②G 1" outer
③G 1/2" inner
④G 1 1/2" inner
⑤G 1 1/4" outer
NADO A B C d E F G H I J K L Lk M N O P Q
750/25 v11 100 280 868 790 980 1680 374 1907 1050 1630 415 2035 2073 742 1219 1695 555 980
1000/25 v11 100 297 885 850 997 1697 391 1932 1067 1647 432 2061 2104 759 1236 1712 572 997

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Thermal insulation NEODUL LB PP
Insulation NEODUL of 80 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.
Figure 5
7DISPOSAL 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.
2-9-2019