Drazice OKC 100 NTR Fiche technique

OPERATION AND

INSTALLATION MANUAL

TANK TYPE INDIRECT WATER HEATERS

OKC 80 NTR/Z

OKC 100 NTR OKC 100 NTR/HV OKC 100 NTR/Z

OKC 125 NTR OKC 125 NTR/HV OKC 125 NTR/Z OKCV 125 NTR

OKC 160 NTR OKC 160 NTR/HV OKC 160 NTR/Z OKCV 160 NTR

OKCV 180 NTR

OKC 200 NTR OKC 200 NTR/Z OKCV 200 NTR

OKC 250 NTR

OKC 200 NTRR

OKC 250 NTRR

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

1TECHNICAL SPECIFICATION OF PRODUCT .................................................................................................4

1.1 FUNCTION DESCRIPTION ................................................................................................................... 4

1.2 ADVICE FOR CUSTOMERS .................................................................................................................. 4

1.2.1 HOT WATER CONSUMPTION ..................................................................................................... 4

1.2.2 ENERGY SAVING......................................................................................................................... 4

1.3 DESIGN AND GENERAL HEATER DIMENSIONS................................................................................... 5

2OPERATION AND FITTING INSTRUCTIONS............................................................................................... 16

2.1 OPERATING CONDITIONS ................................................................................................................ 16

2.2 WALL MOUNTING............................................................................................................................ 16

2.3 PLUMBING FIXTURE......................................................................................................................... 17

2.4 CONNECTION OF INDIRECT HEATER TO HOT WATER HEATING SYSTEM........................................ 20

2.5 FIRST HEATER COMMISSIONING ..................................................................................................... 20

2.6 PUTTING OUT OF SERVICE, DISCHARGE .......................................................................................... 21

2.7 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE ............................................................ 21

2.8 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES .......................................................... 22

3IMPORTANT NOTICES .............................................................................................................................. 23

3.1 INSTALLATION REGULATIONS.......................................................................................................... 23

3.2 PRODUCT ACCESSORIES .................................................................................................................. 23

3.3 DISPOSAL OF PACKAGING MATERIAL AND FUNCTIONLESS PRODUCT ........................................... 23

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Meaning of pictograms used in Manual

Important information for heater users.

Recommendations of manufacturer, observance of which will ensure trouble-free

operation and long service life of the product.

CAUTION!

Important notice to be observed.

READ CAREFULLY THE BELOW INSTRUCTIONS PRIOR TO THE INSTALLATION 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. With this

guide, we will introduce you to the use, construction, maintenance and

other information on electrical water heaters.

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.

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1TECHNICAL SPECIFICATION OF PRODUCT

1.1 FUNCTION DESCRIPTION

Indirect stationary heaters of NTR and NTRR series are used for HSW water heating in conjunction with

another source of heating water, most often a gas boiler, for NTRR types combination of two heating water

sources (gas boiler + solar system, heat pump). Their nominal performance provides sufficient amount of

hot service water (HSW) even 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.

Closing valves of the heat exchanger must be opened which ensures heating water flow from the hot water

heating system. Together with the closing valve, it is recommended to install an air outlet valve at the inlet

to the heat exchanger in order to bleed the heat exchanger as needed, in particular before the beginning of

the heating season (Figure 1, Figure 2, Figure 3, Figure 4). The time of heating using the heat exchanger

depends on the temperature and flow of water in the hot water heating system. Combined heater is made

in universal design – depending on the need of connecting the closing valves to the heating element from

the right or left.

1.2 ADVICE FOR CUSTOMERS

1.2.1 HOT WATER CONSUMPTION

Consumption of hot water in households depends on the number of people, amount of

sanitary equipment, length, diameter and insulation of piping in the flat, or on individual

habits of users.

1.2.2 ENERGY SAVING

Hot utility water reservoir is insulated by means of a first-class polyurethane foam with zero

Freon content. Adjust the temperature of the heater's thermostat to that level only that you

need to run your home. Thus you will reduce electricity consumption, as well as the amount

of lime sediments on the walls of the receptacle and on the heat exchanger.

Advantages of using indirect heater

−Easy installation and connection to heating water supply,

−very fast HSW heating,

−enamelled steel tank ensures all hygienic requirements on the quality of HSW,

−built-in Mg anode increases resistance to corrosion,

−good quality polyurethane insulation ensures minimum thermal losses,

−continuously adjustable temperature of HSW up to 74°C,

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−

connection of multiple withdrawal points,

−the type with two heat exchangers can use two heating water supplies, or double

heat transfer surface can be obtained if those are combined,

−heater operation control light,

−accurate check of HSW temperature,

−possibility of connecting HSW circulation.

1.3 DESIGN AND GENERAL HEATER DIMENSIONS

The heater receptacle is made of a steel plate and tested by 0.9 MPa overpressure. The inside of the

receptacle is enamelled. A flange is welded onto the lower bottom of the receptacle with a flange lid

screwed onto it. A sealing ring is inserted between the flange lid and the flange. Thermo wells for

thermostat sensors and thermometer installation are placed in the flange lid. Anode rod is mounted on M8

nut. The water reservoir is insulated by means of polyurethane foam. Heat exchanger(s) is/are welded onto

the pressure tank.

Description of basic parts of the heater – Figure 1, Figure 2, Figure 3, Figure 4.

Heater dimensions – (Figure 5,Figure 6, Figure 7, Figure 8) and (Table 2, Table 4, Table 6, Table 8)

Technical description: OKC 100 NTR, OKC 125 NTR, OKC 160 NTR, OKC 200 NTR, OKC 250 NTR, OKC 200

NTRR, OKC 250 NTRR

Figure 1

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Technical description: OKC 100 NTR/HV, OKC 125 NTR/HV, OKC 160

NTR/HV

Figure 2

Technical description: OKC 80 NTR/Z, OKC 100 NTR/Z, OKC 125 NTR/Z, OKC 160 NTR/Z,

OKC 200 NTR/Z

Figure 3

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Technical description:

OKCV125 NTR, OKCV 160 NTR, OKCV 180 NTR, OKCV 200

NTR

Figure 4

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OKC 100 NTR, OKC 125 NTR, OKC 160 NTR OKC 200 NTR, OKC 250 NTR, OKC 200 NTRR, OKC 250 NTRR

Figure 5Figure 6

TYPE

OKC 100

NTR

OKC 125

NTR

OKC 160

NTR

OKC 200

NTR

OKC 200

NTRR

OKC 250

NTR

OKC 250

NTRR

881

1046

1235

1400

1580

876*

1041*

1230*

1280

1460

621

751

1150

1330

521

621

881

950

1060

710

890

780

650

780

650

* Height from the bottom heater’s edge to the end of the water inlet and outle.

Table 1

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TYPE

OKC 100

NTR

OKC 125

NTR

OKC 160

NTR

OKC 200

NTR

OKC 200

NTRR

OKC 250

NTR

OKC 250

NTRR

CAPACITY

115

145

210

200

250

245

MAX. OPERATING

OVERPRESSURE IN

THE TANK

MPa

0,6

MAX. OPERATING

PRESSURE IN THE

EXCHANGER

MPa

EL. PROTECTION

IP 44

MAX.

TEMPERATURE OF

HSW

°C

RECOMMENDED

HSW

TEMPERATURE

°C

MAX. WEIGHT OF

THE HEATER

WITHOUT HEATER

57 69 77 95 108 107 118

EXCHANGER HEAT

SURFACE

1.08 1.45 1.45 1.45 2 x 1.08 1.45 2x 1.08

RATED THERMAL

OUTPUT AT

HEATING WATER

TEMPERATURE OF

80°C AND FLOW

720 l/h

24000 32000 32000 32000 2 x

24000 32000 2 x 24000

TIME OF HEATING

BY EXCHANGER

FROM 10°C TO

60°C

min

14 14 17 22 28 / 16 28 36 / 20

Table 2

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OKC 100 NTR/HV, OKC125 NTR/HV, OKC160 NTR/HV

Figure 7

*The height from the bottom edge of the heater to the end of the pipe inlet and outlet.

Table 3

TYP

OKC 100 NTR/HV

OKC 125 NTR/HV

OKC 160 NTR/HV

881

1046

1087

876

1041

1082

124

146

524

584

134

142

174

110

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