Drazice NADO 500/200v7 User manual

OPERATING AND
INSTALLATION MANUAL
STORAGE TANKS
NADO 500/200v7
NADO 750/200v7
NADO 1000/200v7
Družstevní závody Dražice-strojírna s.r.o.
(Works Cooperative - Dražice - Machine Plant, Ltd.)
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 911
fax: +420 / 326 370 980
e-mail: expo[email protected]z

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

- 3 -
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.

- 4 -
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. 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 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 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. The storage tanks are manufactured in 500, 750
and 1000-litre volumes. The 500-litre version is additionally equipped with a tubular exchanger
of 2.5m2 surface and the 750 and 1000 litre version with a tubular exchanger of 3.3 m2 surface and two funnels
G1½“ mm, with the possibility to install an electric heating element of TJ 6/4“ series with an extended cooling
compartment, up to 6 kW. 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 an inner enamelled tank, or preheating
of water for another water heater. Connection to a boiler usually allows direct HSW heating in an inner vessel
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 reheat 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.
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).
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!
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.

- 5 -
3TECHNICAL PARAMETERS
NADO
500/200v7
NADO
750/200v7
NADO
1000/200v7
STORAGE TANK CAPACITY [l] 475 772 999
VOLUME OF STORAGE TANK FOR HW
HEATING [l] 233 233 233
WEIGHT [kg] 175 212 243
TANK DIAMETER [mm] 600 790 790
TANK DIAMETEK WITH INSULATION [mm] 800 990 990
HEAT TRANSFER SURFACE OF HEAT
EXCHANGER [m2] 2,5 3,3 3,3
MAXIMUM TANK PRESSURE [MPa] 0.30.30.3
MAX. PRESSURE IN EXCHANGER TV [MPa] 0.60.60.6
MAX. PRESSURE IN HEAT EXCHANGER [MPa] 111
MAXIMUM TEMPERATURE OF WATER
IN THE TANK [°C] 90 90 90
MAXIMUM TEMPERATURE OF WATER
IN THE EXCHANGER [°C] 90 90 90
MAXIMUM WORKING TEMPERATURE
IN THE HEAT EXCHANGER [°C] 110 110 110
AMOUNT OF 40°C HOT WATER AT 53°C
WATER TEMPERATURE IN THE TANK AND
INLET WATER 15°C / HOT WATER FLOW
[l/(l/min)]
*260 / 10 490 / 10 *750 / 10
AMOUNT OF 40°C HOT WATER AT 80°C
WATER TEMPERATURE IN THE TANK AND
INLET WATER 15 °C / HOT WATER FLOW
[l/(l/min)]
*650 / 10 1170 / 10 *1450 / 10
MAXIMUM OUTPUT OF EL. HEATING ELEMENT
OF TJ 6/4" SERIES [kW] - 2x6 2x6
ENERGY EFFICIENCY CLASS BCC
STANDING LOSS [W] 76 113 126
* value stated by calculation
Table 1

- 6 -
4IMPORTANT WARNING
Connection of the inner vessel to HSW must comply with ČSN 060830, a safety valve has
to be fitted on the cold water inlet.
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.
We recommend checking and cleaning the inner vessel from scale and eventual replacement
of the anode rod after two years of operation. The anode life is theoretically calculated for two
years of operation; however, it changes with water hardness and chemical composition
in the place of use.
Prior to commissioning, we recommend that you run the heating circuit and any impurities
that are trapped in the filter clean, then the system is fully operational.
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.

- 7 -
5TECHNICAL DESCRIPTION
1. Heating water outlet G1"
2. Hot water outlet G3/4"
3. Cold water inlet G3,4"
4. Funnel for additional heating element TJ 6/4" with an extended cooling compartment 2x
5. Thermowell funnel 6x G1/2" - for 750l and 1000l only
6. Funnel for connecting another heating water source 6x G1"
7. Inlet into exchanger G1" (SOLAR)
8. Outlet from exchanger G1" (SOLAR)
9. Funnel for discharge G1"
10. Steel receptacle
11. Exchanger for connecting solar collectors (heat pump)
12. Inner enamelled accumulator for service water heating
Figure 1

- 8 -
NADO 500/200v7
Funnels 6/4" are fitted only with NADO750, 1000/200v7, for the electric heating element of TJ6/4" series
with an extended cooling compartment!!!
Figure 2

- 9 -
NADO 750/200v7, NADO 1000/200v7
Figure 3
Table 2
NADO
750/200 v7
NADO
1000/200v7
A 1940 2240
B 1606 1906
C - 1560
E - 1406
F 1606 1896

- 10 -
Thermal insulation: NEODUL LB PP
Polyester sheet 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.
5-12-2018