Drazice OKC 100 NTR/HV Specification sheet

OPERATING AND

INSTALLATION MANUAL

COMBINED WATER HEATERS AND TANKS

FOR VERTICAL ASSEMBLY

Tank-type water heaters

OKC 80 OKC 160

OKC 100 OKC 200

OKC 125

Hot water tanks

OKC 100/1 m2OKC 160/1 m2

OKC 125/1 m2OKC 200/1 m2

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

1PRODUCT TECHNICAL SPECIFICATION....................................................................................................... 3

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

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

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

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

1.2.3 EMERGENCY POWER CONSUMPTION ....................................................................................... 4

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

2OPERATION AND FITTING INSTRUCTIONS............................................................................................... 11

2.1 OPERATING CONDITIONS ................................................................................................................ 11

2.2 WALL MOUNTING............................................................................................................................ 11

2.3 PLUMBING FIXTURE......................................................................................................................... 13

2.4 ELECTRICAL INSTALLATION.............................................................................................................. 15

2.4.1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION ..................................................... 15

2.5 OPERATION...................................................................................................................................... 16

2.6 FIRST COMMISSIONING................................................................................................................... 16

2.7 PUTTING OUT OF SERVICE, DISCHARGE .......................................................................................... 17

2.8 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE............................................................ 18

2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES .......................................................... 18

3OPERATION OF THERMOSTAT................................................................................................................. 20

3.1 SERVICING........................................................................................................................................ 20

3.1.1 OPERATING DEVICES OF THE HEATER ..................................................................................... 20

3.1.2 TEMPERATURE SETTING .......................................................................................................... 21

4IMPORTANT NOTICES .............................................................................................................................. 22

4.1 INSTALLATION REGULATIONS.......................................................................................................... 22

4.2 TRANSPORT & STORAGE INSTRUCTIONS ........................................................................................ 22

4.3 DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT.................................... 23

5 PRODUCT ACCESSORIES .......................................................................................................................... 23

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CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE WATER 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 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.

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1PRODUCT TECHNICAL SPECIFICATION

1.1 FUNCTION DESCRIPTION

The heater is designed for the so-called accumulation heating of service water by electric energy,

or by thermal energy through exchanger. Water is heated by an electric element at a time determined

by the electricity supplier, or by a heat exchanger in an enamelled thermally insulated tank. At the time

of the heating, the element is controlled by thermostat on which the desired temperature can be set (ranging

from 5 and 74°C). Once the selected temperature is reached, heating interrupts automatically. Water

accumulated in the tank is then used for the consumption. The tank keeps constant pressure of water from

the water main. If the combination faucet hot water valve is opened, water from the water supply conduit

pressed out by cold water pressure flows out of the heater. Hot water flows out through the top part, and

water flowing in remains in the bottom part of the heater. The pressure principle allows hot water withdrawal

at any place from the heater.

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 heater so that your hot

water consumption covered the needs of your household.

1.2.2 ENERGY SAVING

The heater is insulated with quality polyurethane Freon free foam. Set 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 electric body.

1.2.3 EMERGENCY POWER CONSUMPTION

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

for a period of 24 hours at the temperature of 65°C in the heater, 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.

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TANK HEATER

TYPES NOMINAL CAPACITY [L] HEATING TIME FROM

10°C TO 60°C [hours]

ELECTRICITY

CONSUMPTION FOR

HEATING OF VOLUME

FROM 15°C TO 65°C [kWh]

OKC 80 75 2.04.8

OKC 100;

OKC 100/1 m295 2.5 6

OKC 125;

OKC 125/1 m2120 3.28

OKC 160;

OKC 160/1 m2147 3.99.6

OKC 200;

OKC 200/1 m2195 5.212

Table 1

1.3 DESIGN AND GENERAL HEATER DIMENSIONS

The heater tanks are made of a steel plate and tested by 1.5 MPa multiple of operation pressure value.

The inside of the tank is enamelled. A flange is welded onto the bottom of the tank with a flange lid screwed

to it. A sealing ring is inserted between the flange lid and the flange. Thermowells 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 tank. The heat exchanger

is only intended for the heating circuit.

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OKC 80, OKC 100, OKC 125

Upper suspension + detent support (rectifying screw)

Figure 1

OKC 160

Upper suspension + lower suspension

Figure 2

3/4" outer

- 7 -

OKC 200

Upper suspension + lower suspension

Figure 3

OKC 100/1m2, OKC 125/1m2

Upper suspension + detent support (rectifying screw)

Figure 4

3/4" outer



3/4" outer



1" outer



3/4" inner

- 8 -

OKC 160/1m2

Upper suspension + lower suspension

Figure 5

OKC 200/1m2

Upper suspension + lower suspension

Figure 6



3/4" outer



1" outer



3/4" inner



3/4" outer



1" outer



3/4" inner

- 9 -

* Check the R dimensions before drilling.

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

Table 2

TYPE OKC 80 OKC 100

OKC 100/1m2

OKC 125

OKC 125/1m2

OKC 160

OKC 160/1m2

OKC 200

OKC 200/1m2

A 757 902 1067 1255 1290

B 612 612 612 612 655

C 70 70 70 70 70

D 524 524 524 524 584

E 605 755/622 755/789 995/991 790/784

F 460 610/478 610/645 720/815 600

G - -/550 -/550 -/830 -/889

H 142 137/270 302/268 250/254 490/496

I 211 211/263 211/263 211/263 239

J 501 651/703 651/703 651/703 679

K 172 172 172 172 172

R 450 450 450 450 450

- 10 -

Table 3

TYPE OKC 80

OKC 100

OKC 100/1 m2

OKC 125

OKC 125/1 m2

OKC 160

OKC 160/1 m2

OKC 200

OKC 200/1 m2

VOLUME L 75 95 120 147 195

MAX OPERATING

OVERPRESSURE IN THE TANK MPa 0.6

MAX MAXIMUM OPERATING

OVERPRESSURE IN THE

EXCHANGER*

MPa 1

ELECTRICAL CONNECTION V 1 PE-N ~ 230V/50Hz

INPUT W 2200

EL. PROTECTION

IP 44

MAX TEMPERATURE OF HOT

WATER °C 80

MAX OPERATING

TEMPERATURE IN THE

EXCHANGER

°C 110

RECOMMENDED

TEMPERATURE OF HOT WATER °C 60

HEIGHT OF THE HEATER mm 757 902 1067 1255 1290

DIAMETER OF THE HEATER mm 524 524 524 524 584

MAX WEIGHT OF THE HEATER

WITHOUT WATER kg 40 50/57 55/64 62/71 79/85

TIME OF EL. HEATING FROM

10°C TO 60°C* hrs 2.0 2.5 3.2 3.9 5.2

TYPE

OKC 80

OKC 100

OKC 125

OKC 160

OKC 200

EXCHANGER HEAT TRANSFER

SURFACE m20.41 0.68 0.68 0.68 0.68

HEATING TIME BY EXCHANGER

FROM 10°C TO 60°C AT FLOW

720 l/h

min 32 23 28 35 45

RATED THERMAL OUTPUT AT

HEATING WATER

TEMPERATURE 80°C AND

FLOW 310 l/h

W 6000 9000 9000 9000 9000

HEATING TIME BY EXCHANGER

FROM 10°C TO 60°C AT FLOW

310 l/h

min 50 48 55 67 86

LOAD PROFILE M M M L XL

DAILY ELECTRICITY

CONSUMPTION kWh 6.19 6.31 6.59 12.03 20.34

MIXED WATER V40 L 138.7 165.41 231.1 242.83 331.26

TYPE

OKC 100/1m

OKC 125/1m

OKC 160/1m

OKC 200/1m

EXCHANGER HEAT TRANSFER

SURFACE m2- 1.08 1.08 1.08 1.08

RATED OUTPUT AT HEATING

WATER TEMPERATURE OF

80°C AND FLOW 720 L/H

W - 24000 24000 24000 24000

HEATING TIME BY EXCHANGER

FROM 10°C TO 60°C min - 14 17 21 28

STATIC LOSS W - 47 57 67 72

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