Drazice OKC 80 Specification sheet

OPERATION AND

INSTALLATION MANUAL

COMBINED WATER HEATERS AND STORAGE

TANKS FOR VERTICAL MOUNTING

Combined water heathers Hot water storage tanks

OKC 80

OKC 100 OKC 100/1 m2

OKC 125 OKC 125/1 m2

OKC 160 OKC 160/1 m2

OKC 180 OKC 180/1 m2

OKC 200 OKC 200/1 m2

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 APPLIANCE TECHNICAL SPECIFICATION..................................................................................................... 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 DIMENSIONS ................................................................................................ 5

2 OPERATION AND FITTING INSTRUCTIONS................................................................................................. 8

2.1 OPERATING CONDITIONS .................................................................................................................. 8

2.2 WALL MOUNTING.............................................................................................................................. 8

2.3 PLUMBING FIXTURE........................................................................................................................... 9

2.4 ELECTRIC INSTALLATION.................................................................................................................. 11

2.4.1 ELECTRIC INSTALLATION GENERAL INFORMATION................................................................. 11

2.5 CONNECTION OF APPLIANCE TO HOT WATER SYSTEM................................................................... 11

2.6 FIRST COMMISSIONING................................................................................................................... 13

2.7 PUTTING OUT OF SERVICE, DISCHARGE .......................................................................................... 13

2.8 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE............................................................ 14

2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES .......................................................... 15

3 OPERATION OF THERMOSTAT................................................................................................................. 16

3.1 SERVICING........................................................................................................................................ 16

3.1.1 OPERATING DEVICES OF THE APPLIANCE................................................................................ 16

3.1.2 TEMPERATURE SETTING .......................................................................................................... 16

4 IMPORTANT NOTICES .............................................................................................................................. 17

4.1 INSTALLATION REGULATIONS.......................................................................................................... 17

4.2 DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING APPLIANCE ................................. 17

5 APPLIANCE ACCESSORIES ........................................................................................................................ 18

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Meaning of pictograms used in Manual

Important information for appliance users.

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

operation and long service life of the appliance.

CAUTION!

Important notice to be observed.

READ CAREFULLY THE BELOW INSTRUCTIONS PRIOR TO THE INSTALLATION OF

THE HEATER OR TANK!

Dear Customer,

The Works Cooperative of Dražice - Machine Plant, Ltd., would like to

thank you for your decision to use a appliance of our brand. With this

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

other information on water heaters and storage tanks.

The manufacturer reserves the right for engineering modification of the appliance. The appliance is

designed for permanent contact with drinkable water.

It is recommended to use the appliance in indoor environment with air temperatures from +2°C to 45°C

and a relative humidity up to 80%.

Appliance’s reliability and safety is proven by tests implemented by the Engineering Test Institute in Brno.

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1APPLIANCE TECHNICAL SPECIFICATION

1.1 FUNCTION DESCRIPTION

The water heater as well as the storage tank (thereinafter the appliance) is designed for accumulation

heating of service water using electricity or thermal energy via an exchanger. Water is heated by an electric

element or a heat exchanger in an enamelled thermally insulated vessel at the time defined by the power

supplier. The element is at the time of heating controlled by a thermostat the temperature of which can be

adjusted continuously (within the range between 5°C and 74°C). Once the selected temperature is reached,

heating interrupts automatically. Water accumulated in the vessel is then used for the consumption. The

appliance keeps constant pressure of water from the water main. Is the combination faucet hot water valve

opened, water from the water supply conduit pressed out by cold water pressure flows out of the

appliance. Hot water flows out through the top part, and water flowing in remains in the bottom part of the

appliance. Pressure principle allows hot water withdrawal at any place from the appliance (Figure 5).

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. The cheapest option of water heating comes at the time when the

electricity rate is reduced.

Find out in what time intervals your electricity supplier provides reduced tariff and,

depending on that information, select relevant volume and power input of the appliance so

that your hot water consumption covered the needs of your household.

1.2.2 ENERGY SAVING

Hot utility water reservoir is insulated by means of top-quality polyurethane foam with zero

CFCs content. Adjust the temperature of the appliance'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.

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EMERGENCY POWER CONSUMPTION

If no heated water is taken from the appliance, a small amount of heat leaks. This loss is

measured for a period of 24 hours at the temperature of 65°C in the appliance, and at 20°C

in its ambient area. The resulting value is expressed in units [kWh/24h] and indicates the

amount of power needed to maintain the set temperature.

TYPE

NOMINAL CAPACITY

(L)

TIME OF CONTENT HEATING

(HOURS)

ELECTRICICTY

CONSUMPTION FOR

HEATING THE VOLUME

FROM 15°C TO 65°C IN

kWh

OKC 80

2,5

4,8

OKC 100;

OKC 100/1 m2

OKC 125;

OKC 125/1 m2

120

3,8

OKC 160;

OKC 160/1 m2

147

9,6

OKC 180;

OKC 180/1 m2

175

10,6

OKC 200;

OKC 200/1 m2

195

5,5

Table 1

1.3 DESIGN AND GENERAL DIMENSIONS

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

enamelled. A flange is welded onto the bottom of the vessel with a flange lid screwed to it.

A sealing ring is inserted between the flange lid and the flange. Thermo wells for placing a heating element

and sensors of regulation thermostat and safety fuse are located in the flange lid. An anode rod is mounted

onto the M8 nut. The water reservoir is insulated by means of polyurethane foam. Electric wiring is placed

underneath the plastic removable cover. The temperature of water can be set using the thermostat. In

combined versions, a heat exchanger is welded in the pressure vessel. The heat exchanger is only intended

for the heating circuit.

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Technical description: OKC 80, OKC 100, OKC 125, OKC 160, OKC 180, OKC 200, OKC 100/1m2, OKC

125/1m2, OKC 160/1m2, OKC 180/1m2, OKC 200/1m2

Figure 1

*Distance from the upper appliance's edge to the end of the water inlet and outlet tubes. Check the B and N dimensions before

drilling.

The values behind the slash apply to storage tanks with a 1 m2exchanger.

Table 2

TYPE

OKC 80

OKC 100

OKC 125

OKC 160

OKC 180

OKC 200

OKC 100/1m2

OKC 125/1m2

OKC 160/1m2

OKC 180/1m2

OKC 200/1m2

736

881

1046

1235

1187

1287

731

876

1041

1230

1182

1282

615

765 / 636

765/801

1005

793

524

584

501

651 / 701

685

- / 551

- / 831

- / 895

G3/4"

G3/4" / G1"

- / G3/4"

211

211 / 261

245

720 / 815

600

Upper and lower suspension

160,180,200L

4 anchor bolts

Dimensions 450mm and E

Double check before drilling

Upper suspension

and support

80-125L

2 anchor bolts

- 7 -

Table 3

TYPE

OKC 80

OKC 100

OKC 125

OKC 160

OKC 180

OKC 200

OKC 100/1

OKC 125/1 m2

OKC 160/1 m2

OKC 180/1 m2

OKC 200/1 m2

VOLUME

120

147

175

195

MAX OPERATING

OVERPRESSURE IN THE VESSEL

MPa

0,6

MAX MAXIMUM OPERATING

OVERPRESSURE IN THE

EXCHANGER*

MPa

ELECTRICAL CONNECTION

1 PE-N 230V/50Hz

INPUT

2000

2200

EL. PROTECTION

IP 45

MAX TEMPERATURE TUV

°C

RECOMMENDED TUV

TEMPERATURE

°C

HEIGHT

736

881

1046

1235

1187

1287

DIAMETER

524

584

MAX WEIGHT WITHOUT

WATER

52/58

58/64

66/72

72/77

78/83

TIME OF EL. HEATING FROM

10°C TO 60°C*

hrs

2,5

3,8

5,5

TYPE

OKC 80

OKC 100

OKC 125

OKC 160

OKC 180

OKC 200

EXCHANGER HEAT TRANSFER

SURFACE

0,41

0,68

RATED THERMAL OUTPUT AT

HEATING WATER

TEMPERATURE OF 80°C AND

FLOW 720 L/H

9000

17000

HEATING PERIOD WITH

EXCHANGE FROM 10°C TO

60°C WITH FLOW 720 l/h

min

RATED THERMAL OUTPUT AT

HEATING WATER

TEMPERATURE OF 80°C AND

FLOW 310 l/h

7000

9000

HEATING PERIOD WITH

EXCHANGE FROM 10°C TO

60°C WITH FLOW 310 l/h

min

LOAD PROFILE

DAILY ELECTRICITY

CONSUMPTION Qelec

kWh

6,19

6,31

6,59

12,03

20,11

20,34

MIXED WATER V40

138,7

165,41

231,1

242,83

297,01

331,26

TYPE

OKC

100/1m2

OKC 125/1m2

OKC 160/1m2

OKC 180/1m2

OKC 200/1m2

EXCHANGER HEAT TRANSFER

SURFACE

1,08

RATED OUTPUT AT HEATING

WATER TEMPERATURE OF

80°C AND FLOW 720 L/H

24000

TIME OF HEATING BY

EXCHANGER FROM 10°C TO

60°C

min

STANDING LOSS

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2OPERATION AND FITTING INSTRUCTIONS

2.1 OPERATING CONDITIONS

The appliance shall only be used in accordance with the conditions specified on the

performance plate and in instructions for electric wiring. Besides legally acknowledged

national regulations and standards, also conditions for connection defined in local electric

and water works have to be adhered to, as well as the installation and operation manual.

The room, in which the appliance will be operated, must be frost-free. Temperature in the

appliance installation location must not exceed +2 °C. The appliance has to be mounted at a

convenient place, it means that the appliance must be easily available for potential

necessary maintenance, repair or replacement, as the case may be.

We would like to emphasise that the appliance must not be connected to power supply if

work involving flammable liquids (petrol, spot remover) or gases, etc., is performed

nearby.

If water is strongly calcareous we recommend that any of the common decalcifying devices

was installed with the appliance, or the thermostat to be set to minimum operation

temperature of 60oC. For proper operation, drinkable water of adequate quality shall be

used. To avoid potential sediments we recommend that the device was installed together

with a water filter.

2.2 WALL MOUNTING

Prior to mounting, check the loading capacity of the wall and, depending on the type

of masonry, choose a suitable anchorage material, or reinforce the wall, if needed.

The appliance shall only be mounted in vertical position so that the lower edge

of the heater was placed at least 600 mm above the floor (Figure 1). In combined heaters,

elbows have to be attached to the heating water inlet and outlet and, by turning them,

the mounting either from the right or from the left has to be determined (Figure 3).

With regard to various types of carrying masonry and broad assortment of special anchorage

material available at the market, we do not provide appliances with this material.

The anchorage system has to be selected individually, depending on the conditions.

We recommend an authorised company perform mounting on the wall and anchorage,

or discuss the anchorage with a professional.

- 9 -

Figure 2

2.3 PLUMBING FIXTURE

Connection of appliances to plumbing fixtures is illustrated on (figure 4, figure 6).

For potential disconnection of the appliance, the service water inlets and outlets must be

provided with screw coupling Js 3/4“. The safety valve is mounted on the cold water inlet

identified with a blue ring.

Each hot service water pressure appliance must have a safety valve with a membrane spring.

The safety valve must be easily accessible, as close to the appliance as possible. The inlet

pipes must have at least the same clearance as the safety valve. The safety valve is placed

high enough to secure dripping water drain by gravity. We recommend mounting the safety

valve onto a branch pipe. This allows easier exchange without having to drain the water from

the appliance. Safety valves with fixed pressure settings from the manufacturer are used for

the assembly. Starting pressure of a safety valve must be identical to the maximum allowed

appliance pressure, and at least 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

- 10 -

system. No stop valves can be put between the appliance and the safety valve. During

assembly, follow the guide provided by the safety equipment manufacturer.

It is necessary to check the safety valve each time before putting it into operation. It is

checked by manual moving of the membrane from the seat, turning the make-and-break

device button always in the direction of the arrow. After being turned, the button must click

back into a notch. Proper function of the make-and-break device results in water draining

through the safety valve outlet pipe. In common operation, such a check needs to be

implemented at least once a month, and after each appliance shutdown for more than 5

days. Water may be dripping off the drain pipe of the safety valve; the pipe must be open

into the air, pointed down; environment temperatures must not drop below zero. When

draining the appliance, use the recommended drain valve. First, close the water supply into

the appliance. Find necessary pressure values in the following table. For proper safety valve

operation,

a backflow valve must be mounted on the inlet pipes, preventing spontaneous appliance

draining and hot water penetrating back into the water main.

Required pressures - Table 4. We recommend that the hot water distribution from the appliance was as

short as possible to minimise heat losses.

SAFETY VALVE STARTING

PRESSURE (MPa)

ACCEPTABLE OPERATING OVER-PRESSURE

OF THE APPLIANCE (MPa)

MAX COLD WATER

PRESSURE IN PIPING (MPa)

0,6

up to 0.48

0,7

up to 0.56

up to 0.8

Table 4

Appliances must be provided with a discharge valve mounted on the cold service water inlet to the

appliance for potential disassembly or repair.

O - Air outlet valve

U –Shut-off valve

P1 - Safety valve with backflow flap

P2 - Safety valve for heating circuit

M - Manometer

Z –Test valve

V - Drain valve

Figure 1

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