Drazice OKC 250 NTR/HP, OKC 300 NTR/HP, OKC 750 NTR/HP, OKC 500 NTR/HP, OKC 1000 NTR/HP Operating And Installation Instruction Manual
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OPERATING AND
INSTALLATION MANUAL
Indirect water tank
OKC 250 NTR/HP
OKC 300 NTR/HP
OKC 400 NTR/HP
OKC 500 NTR/HP
OKC 750 NTR/HP
OKC 1000 NTR/HP
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: export@dzd.cz
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CONTENTS
1 PRODUCT TECHNICAL SPECIFICATION ....................................................................................................... 4
1.1 FUNCTION DESCRIPTION ................................................................................................................... 4
1.2 DESIGN AND BASIC DIMENSIONS OF TANK ....................................................................................... 4
1.2.1 PRODUCT DESCRIPTION............................................................................................................. 4
1.2.2 TECHNICAL DATA ....................................................................................................................... 5
1.2.3 PRESSURE LOSSES .................................................................................................................... 10
2 OPERATION AND FITTING INSTRUCTIONS ............................................................................................... 11
2.1 PUTTING THE TANK INTO OPERATION ............................................................................................ 11
2.2 CONNECTING A TANK TO HOT WATER SYSTEM .............................................................................. 12
2.3 PLUMBING FIXTURE ......................................................................................................................... 13
2.4 CONNECTION OF TANK TO HOT WATER DISTRIBUTION SYSTEM.................................................... 14
2.5 CLEANING OF TANK AND EXCHANGE OF ANODE ROD .................................................................... 15
2.6 SPARE PARTS.................................................................................................................................... 16
3 IMPORTANT NOTICES .............................................................................................................................. 16
3.1 IMPORTANT NOTICES ...................................................................................................................... 16
3.2 INSTALLATION REGULATIONS.......................................................................................................... 16
3.3 DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT.................................... 16
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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 present instructions will introduce you to the use, construction,
maintenance and other information regarding electrical water
tanks.
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 tank 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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1 PRODUCT TECHNICAL SPECIFICATION
1.1 FUNCTION DESCRIPTION
The OKC 250 (300, 400, 500, 750, 1000) NTR/HP stationary tank is designed for the preparation of hot sanitary
water in combination with heat pump. Reheat can be carried out by the electric heater TJ 6/4".
1.2 DESIGN AND BASIC DIMENSIONS OF TANK
1.2.1 PRODUCT DESCRIPTION
The tank receptacle is welded of steel plate and, as a unit, protected with enamel that resists to hot water.
For additional corrosion protection two magnesium anodes are mounted in the upper part of the receptacle
and in the side flange to adjust the electric potential inside the receptacle, thus reducing effects of corrosion.
Inside the vessel there is a welded heat exchanger made of steel pipe with enamelled outer coating,
and connections of hot and cold water, circulation and thermostat tank.
The pipe heat exchanger is only intended for the heating circuit.
There is a cleaning and revision aperture on the side of the tank, ended with a flange of 110 mm clearance;
the spacing of eight M8 screws is 150 mm. The heater is equipped with a G 1 1/2" aperture for screwing
an additional heater in. This variant is used - if the tank is connected in a system with heat pump - to finish
heating water in the upper part of the tank to the desired temperature. Insulation of the receptacle is 50
or 60 mm Freon - free polyurethane foam; the shell of the tank is plastic.
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1.2.2 TECHNICAL DATA
Table 1
TYPE
OKC 250
NTR/HP
OKC 300
NTR/HP
OKC 400
NTR/HP
OKC 500
NTR/HP
OKC 750
NTR/HP
OKC 1000
NTR/HP
CAPACITY l
234 286 352 469 710 930
HEIGHT mm
1537 1558 1644 1914 2039 2053
DIAMETER mm
584 670 700 700 950 1050
MAXIMUM WEIGHT
WITHOUT WATER
kg
119 133 190 223 259 324
MAXIMUM OPERATING
PRESSURE IN THE TANK
MPa
1 1 1 1 1 1
MAXIMUM OPERATING
OVERPRESSURE IN THE
EXCHANGER
MPa
1 1 1 1 1 1
MAXIMUM HEATING
WATER TEMPERATURE
°C
110 110 110 110 110 110
MAXIMUM HOT WATER
TEMPERATURE
°C
90 90 90 90 90 90
EXCHANGER HEAT SURFACE m2
2.5 3.2 5.2 6.4 7.0 9.0
EXCHANGER VOLUME L
17 21 32 39 47 63
ENERGY EFFICIENCY CLASS
C C C C C C
STATIC LOSS W
87 72 90 105 130 142
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