Drazice NADO 800/35v9 Specification sheet

OPERATION AND
INSTALLATION MANUAL
Storage Tanks
NADO 800/35v9
NADO 1000/35v9
Družstevní závody Dražice - strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 990
fax: +420 / 326 370 980
e-mail: [email protected]

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CONTENTS
1 Description................................................................................................................................................. 3
2 Designing the size and connection of storage tank to the heating system............................................... 3
3 Technical Parameters ................................................................................................................................ 4
4 Technical description................................................................................................................................. 5
READ CAREFULLY THE BELOW INSTRUCTIONS PRIOR TO THE INSTALLATION OF
THE STORAGE TANK!
Dear Customer,
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.

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1DESCRIPTION
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.
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 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 storage tanks are manufactured in 800 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 equipped with a tubular exchanger and a buried stainless
exchanger of 35 litre volume, and two funnels G1½“ with the possibility to install an electric heating
element of TJ 6/4“ series. The tanks are equipped with a removable 100 m thick insulation –polyester foam
- and a Symbio 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 the inner
tank 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 the water to
the desired temperature, or final electric heating has to be fitted in the storage tank which is enabled by
the electric heating unit of TJ 6/4“ series.
2DESIGNING 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).
Notice: When putting into operation, water has to be filled first into the inner stainless
HSW exchanger 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 might get damaged!

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3TECHNICAL PARAMETERS
NADO 800/35v9
NADO 1000/35v9
Storage tank capacity [l]
820
956
Capacity of stainless exchanger [l]
35
35
Capacity of bottom exchanger [l]
25
25
Capacity of upper exchanger [l]
18
25
Weight [kg]
206
251
Heating surface of stainless exchanger [m2]
8.5
8.5
Heating surface of bottom exchanger [m2]
3.3
3.3
Heating surface of upper exchanger [m2]
2.2
3.3
Maximum tank pressure [MPa]
0.3
0.3
Maximum pressure of stainless exchanger [MPa]
0.6
0.6
Maximum pressure of bottom and upper exchanger [MPa]
1
1
Maximum temperature of water in the tank and
exchanger [°C]
90
90
Amount of 40℃hot water at 53℃water temperature in
the tank [l]
490
539
Amount of 40℃hot water at 80℃water temperature in
the tank [l]
1170
1287
Maximum output of el. heating element of TJ 6/4"
series [kW]
2x6
2x6
Standing loss [W]
118/160
138/171
It is recommended that the product is used in an indoor environment with air
temperatures from +5°C to 45°C and a maximum relative humidity up to 80%. 80%.
Connection of the inner tank to HSW must comply with \u268 CSN 060830, a safety valve
has to be fitted on the cold water inlet.

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4TECHNICAL DESCRIPTION
1. Bleeding (heating water outlet) - G1“
2. Hot service water outlet - G 1 ¼“
3. Steel receptacle
4. Exchanger for connecting an additional heating source
5. Funnel for additional heating element TJ 6/4“ – G 1 ½“ (2 units)
6. Buried stainless exchanger for service water heating by flow
7. Exchanger for connecting solar collectors (heat pump)
8. Cold water inlet - G 1 ¼“
9. Inlet into exchanger - G 1“
10. Funnel for connecting an additional heating water source - G 1 ½“ (3 units)
11. Outlet from exchanger - G 1"
12. Entry to (solar) exchanger –G1“
13. Funnel for a thermowell - G ½“ (6 units)
14. Stratification pipe
15. Outlet from exchanger (solar) - G 1“

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NADO 800/35v9, NADO 1000/35v9
30-9-2015
NADO 800/35v9
NADO 1000/35v9
A
1017
1130
B
1943
1887
C
1290
1500
D
570
640
E
256
527
F
287
257
G
465
495
H
-
840
I
877
950
J
947
1027
K
1017
1107
L
1113
1190
M
1190
1330
N
1290
1450
O
1390
1520
P
1550
1850
R
1943
2243