Drazice NADOS 800/140v1 Specification sheet

OPERATING AND
INSTALLATION MANUAL
STORAGE TANKS
NADS 800 v3 NADS 900 v3
NADOS 800/140v1 NADOS 900/140v1
NADOS 800/140v2 NADOS 900/140v2
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

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CONTENTS
1DESCRIPTION ............................................................................................................................................. 4
2DESIGNING THE SIZE AND CONNECTION OF STORAGE TANK ................................................................... 4
3TECHNICAL PARAMETERS.......................................................................................................................... 5
4TECHNICAL DESCRIPTION .......................................................................................................................... 6
5 DIMENSIONS AND CONNECTION .............................................................................................................. 7
6DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT............................................ 10

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CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE TANK!
Dear Customer,
The Družstevní závody Dražice - strojírna s.r.o. 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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1DESCRIPTION
Storage tanks are used to accumulate excess heat from its source. The source can be a solid fuel boiler, heat
pump, solar collectors, fireplace insert, etc.
The NADS tanks only serve to store heat in a heating system. The NADOS tanks also allow heating
or preheating of DHW in the inner vessel. The integration of the storage tank into a heating system with the
solid fuel boiler enables optimal operation of the boiler at a favourable temperature during the operation
of the boiler. The benefit is mainly the period of the optimal operation (i.e. with maximum efficiency) when
the excess heat is stored in the tank.
The tanks as well as the possible tube exchangers are made of steel, without any treatment of the inner
surface; the outer surface of the tank is provided with a protective coating. The tanks are made in volumes
of 800, 900 litres. The particular versions are also equipped with a tube heat exchanger, each with an area
1.5 m2.
The NADOS type allows direct heating of the domestic hot water (DHW) in an inner enamelled vessel,
or its preheating or another water heater. The connection with the boiler usually allows direct heating
of DHW in the inner tank to the required temperature, while the connection to solar collectors or a heat
pump only preheats the DHW and it is necessary to include another, e.g. electric heater, which heats
the water to the required temperature, or to install an electric heater into the storage tank, which can be
an electrical heating unit TJ 6/4“.
The tanks are not intended for storing DHW - domestic hot water.
2DESIGNING THE SIZE AND CONNECTION OF
STORAGE TANK
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 pressurized
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 storage tank!!!

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Connection of the inner vessel to HSW must comply with ČSN 060830, a safety valve has
to be fitted on the cold water inlet.
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.
3TECHNICAL PARAMETERS
TYPY NADOS 800/140v1
NADOS 800/140v2
NADOS 900/140v1
NADOS 900/140v1
TANK VOLUME l775 930
TANK VOLUME FOR HOT WATER HEATIG l140 140
WEIGHT WITHOUT INSULATION kg 128
155
144
186
MAXIMUM PRESSURE IN THE TANK bar 33
MAXIMUM PRESSURE IN THE HOT WATER
TANK bar 66
MAXIMUM PRESSURE IN THE EXCHANGER bar 10 10
MAXIMUM OPERATING TEMPERATURE IN THE
TANK °C 90 90
MAXIMUM OPERATING TEMPERATURE IN THE
HOT WATER TANK °C 90 90
MAXIMUM TEMPERATURE IN THE EXCHANGER °C -
110
-
110
HEAT EXCHANGER AREA m2-
1,5
-
1,5
EXCHANGER VOLUME l-
10,5
-
10,5
HOT WATER YIELD 40°C AT TANK
TEMPERATURE 53°C AND INLET WATER 15°C /
HOT WATER FLOW
l/(l/min) * 495/5 * 490/10
HOT WATER YIELD 40°C AT TANK
TEMPERATURE 80°C AND INLET WATER 15°C /
HOT WATER FLOW
l/(l/min) * 1175/5 * 1170/10
MAXIMUM OUTPUT OF THE ELECTRICAL
HEATING ELEMENT OF SERIES TJ 6/4” kW 1 x 3,75 + 2 x 9
1 x 3,75 + 1 x 9
1 x 3,75 + 2x9
1 x 3,75 + 1 x 9
ENERGY EFFICIENCY CLASS C C
STATIC LOSS W116 132
* value stated by calculation
Table 1

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4TECHNICAL DESCRIPTION
NADOS 800,900/140v1 NADOS 800,900/140v2
NADS 800,900
1. Inlets and outlets of the storage tank, it is possible to mount a TJ body inner G 1 ½“
2. Inlet and outlet of the DHW tank outer G 3/4“
3. Outlet of accumulated hot water (venting) outer G 1“
4. Water outlet from the storage tank (return water) inner G 1“
5. Sensor well (thermometer, thermostat) inner G ½“
6. Heating water inlet outer G 1“
7. Heating water outlet outer G 1“
8. Inlets and outlets of the storage tank inner G 1 ½“

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5DIMENSIONS AND CONNECTION
NADS 800 v3, NADS 900 v3
Figure 1
Table 2

G 1 1/2" inner

G 1/2" inner

G 1" outer
G 1" inner
A B C d E F G H L Lk
NADS 800 v3 157 275 870 790 1470 365 1380 1750 1880 1900
NADS 900 v3 157 275 1020 790 1795 365 1705 2075 2205 2220

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NADOS 800/140v1, NADOS 900/140v1
Figure 2
Table 3
G 1 1/2" inner
G 1/2" inner
G 1" outer
G 3/4" outer

G 1" inner
A B C d E F G H L Lk
NADOS 800/140v1 157 275 870 790 1470 365 1380 1750 1880 1900
NADOS 900/140v1 157 275 1020 790 1795 365 1705 2075 2205 2220

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NADOS 800/140v2, NADOS 900/140v2
Figure 3
Table 4
G 1 1/2" inner

G 1/2" inner
G 1" outer
G 3/4" outer

G 1" inner
A B C d E F G H J K L Lk
NADOS 800/140v2 157 275 870 790 1470 365 1380 1750 275 803 1880 1900
NADOS 900/140v2 157 275 1020 790 1795 365 1705 2075 275 803 2205 2220

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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 4
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.
2-9-2019