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Read carefully the below instructions prior to the installation of the heater!

 

 

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 manufacturer reserves the right for engineering modification of the product. 
The product is designed for permanent contact with drinkable water.

 

 
 
 
 
 

Guide Contents 

 

 

1.

 

USE ........................................................................................................................................................................................... 2

 

2.

 

PRODUCT DESCRIPTION ...................................................................................................................................................... 2

 

3.

 

IMPORTANT NOTICES .......................................................................................................................................................... 3

 

4.

 

PUTTING THE HEATER INTO OPERATION ........................................................................................................................ 3

 

5.

 

TECHNICAL DATA ................................................................................................................................................................ 4

 

6.

 

CONNECTING A HEATER TO A HOT WATER DISTRIBUTION ........................................................................................ 5

 

7.

 

SECURITY EQUIPMENT ........................................................................................................................................................ 5

 

8.

 

SPARE PARTS ......................................................................................................................................................................... 6

 

9.

 

HEATER CLEANING AND ANODE ROD EXCHANGE ....................................................................................................... 6

 

10.

 

INSTALLATION REGULATIONS .......................................................................................................................................... 6

 

11.

 

CONNECTING A HEATER TO A HEATING SYSTEM ......................................................................................................... 6

 

12.

 

PERFORMANCE DATA .......................................................................................................................................................... 8

 

13.

 

PRESSURE LOSSES ................................................................................................................................................................ 9

 

14.

 

ASSEMBLY GUIDE FOR ZIP-FASTENER INSULATION .................................................................................................. 10

 

15.

 

CONSTRUCTION HEATER PARAMETERS ........................................................................................................................ 11

 

 
 

Environment Type: 

It  is  recommended  to  use  the  product  in  indoor  environment  with  air  temperatures  from  +2°C  to  45°C  and  relative 
humidity up to 80%. 

 

 
 

1. 

USE 

 

Indirect  stationary  heaters  lines  NTR  and  NTRR  are  used  for  water  heating  in  conjunction  with  another  source  of 
heating  water,  most  often  a  gas  boiler.  The  NTRR  types  combine  two  sources  of  heating  water  (gas  boiler  +  a  solar 
system,  or  a  heat  pump).  Their  nominal  performance  provides  sufficient  amount  of  hot  water  for  large  flat  units, 
premises,  restaurants,  and  similar  establishments. 

In  case  of  increased  hot  water  consumption,  these  tanks  heat 

water continuously, operating similarly to flow heaters.

 

 
 

2. 

PRODUCT DESCRIPTION 

 
The  heater  tank  is  welded  from  a  steel  sheet;  it  is  entirely  coated  with  hot  water  resistant  enamel.  For  additional 
corrosion protection, (only in 800 l tanks) a magnesium anode is attached, adjusting the electric potential inside of the 
tank, decreasing corrosion. One or two spiral steel pipe exchangers, enamelled on the outside, are welded on inside the 
tank, as well as hot and cold water and circulation pipes and a thermowell.

 

The pipe heat exchanger is only intended 

for the heating circuit.

 

On the heater side, there is a cleaning and revision opening ending with a 178 mm flange; the clearance including 12 
M12 bolts is 210 mm. Using a 150/210 reduction flange, heating units of various performances, with a thermostat and a 
safety fuse may be mounted into the opening. The NTR and NTRR series heaters are equipped with a G 1/2” opening 

Summary of Contents for OKC 1500 NTR/1Mpa

Page 1: ...Pa OKC 800 NTRR 1 MPa OKC 1500 NTR 1 MPa OKC 1500 NTRR 1 MPa OKC 2000 NTR 1 MPa OKC 2000 NTRR 1 MPa Družstevní závody Dražice strojírna s r o Works Cooperative Dražice Machine Plant Ltd Dražice 69 29471 Benátky nad Jizerou Tel 326 370911 fax 326 370980 www dzd cz dzd dzd cz ...

Page 2: ...junction with another source of heating water most often a gas boiler The NTRR types combine two sources of heating water gas boiler a solar system or a heat pump Their nominal performance provides sufficient amount of hot water for large flat units premises restaurants and similar establishments In case of increased hot water consumption these tanks heat water continuously operating similarly to ...

Page 3: ...in case of a combined heater We recommend you operate the heater with one type of energy In case a solar system is connected to the bottom exchanger it is necessary to connect a TJ 6 4 line element in the coupling above the heater for potential additional heating 4 PUTTING THE HEATER INTO OPERATION After connecting a heater to the water main the hot water heating system the electric network and af...

Page 4: ...erature C 110 110 110 Max hot water temperature C 95 95 95 Heating surface of the bottom top exchanger m 2 2 76 1 2 3 5 1 75 4 2 0 Bottom top exchanger performance for temperature drop 80 60 C kW 36 4 19 2 38 9 26 4 71 5 41 9 Hot water1 permanent performance bottom top exchanger l hr 627 330 670 454 761 503 Heating time by bottom top exchanger for temperature drop 80 60 C min 70 60 128 94 155 108 ...

Page 5: ...ast 20 higher than the maximum pressure in the water main If the water main pressure exceeds such value a reduction valve must be added to the system No stop valves can be put between the heater and the safety valve During the assembly follow the guide provided by the safety equipment manufacturer Before putting the safety valve into operation it always needs to be checked by manual removal of the...

Page 6: ...emises Premises with tub or shower to hot service water heating system c to the hot water heating system ČSN 06 0320 Thermal systems in buildings Hot water preparation Design and Project Engineering ČSN 06 0830 Thermal systems in buildings Protecting devices ČSN 73 6660 Internal water mains ČSN 07 7401 Water and steam for thermal energy equipments with working steam pressure up to 8 MPa ČSN 06 101...

Page 7: ...eated by a gas boiler and solar collectors controlled by a three way valve An example of a group heater connection for steady hot water consumption from all tanks using Tichelmann s method OV Heating water TUV Hot service water SV Cold water 1 Return valve C Circulation 2 Pump ...

Page 8: ... time by exchanger for temperature drop 80 60 C min 262 155 86 73 Performance for temperature drop 80 60 C kW 28 9 44 2 71 5 81 4 Permanent performance l hr 498 761 1230 1400 2000 NTRR top exchanger surface 2 00 m2 Heating time by exchanger for temperature drop 80 60 C min 160 108 70 63 Performance for temperature drop 80 60 C kW 21 2 29 2 41 9 46 3 Permanent performance l hr 364 503 721 797 NL Po...

Page 9: ...eater 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 boiler packages to a waste disposal place determined by the town When the operation terminates disassemble and transport the discarded and unserviceable heater to a waste recycling centre collecting yard or contact the manufacturer 1 1...

Page 10: ...ection of the arrows to put the two insulation sides together so that see Fig 1 the openings in the insulation fit the boiler inlets and outlets It must be secured that both halves of the closure are not further than 20 mm apart before closing see fig 2 No foam shall get into the zip fastener on closing After the insulation coat is properly mounted and the closure closed insert the top lid made of...

Page 11: ...11 15 CONSTRUCTION HEATER PARAMETERS OKC 800 NTR 0 6 MPa OKC 800 NTRR 0 6 MPa ...

Page 12: ...B 442 452 C 1117 1152 D 1100 1200 d 1000 1100 E 1217 1252 F 1825 1997 G 437 447 H 1167 1202 I 1354 1472 J 1494 1612 K 1825 1997 OKC 1500 NTRR 1 MPa OKC 2000 NTRR 1 MPa A 2240 2430 B 442 452 C 1067 1090 D 1200 1300 d 1000 1100 E 1217 1252 F 1342 1393 G 1722 1713 H 1825 1997 I 437 447 J 1167 1202 K 1354 1472 L 1494 1612 M 1825 1997 ...

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