Drazice OKCE 100 S/2 Specification sheet

OPERATING AND
INSTALLATION MANUAL
WATER HEATERS
STATIONARY ELECTRICAL
OKCE 100 S/2,2 kW OKCE 200 S/3-6 kW OKCE 300 S/1 MPa
OKCE 125 S/2,2 kW OKCE 250 S/2,2 kW OKCE 400 S/1 MPa
OKCE 160 S/2,2 kW OKCE 250 S/3-6 kW OKCE 500 S/1 MPa
OKCE 160 S/3-6 kW OKCE 750 S/1 MPa
OKCE 200 S/2,2 kW OKCE 1000 S/1 MPa
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 PRODUCT DESCRIPTION .................................................................................................................... 4
1.3 CONSTRUCTION AND GENERAL HEATER DIMENSIONS..................................................................... 5
1.4 TECHNICAL PARAMETERS.................................................................................................................. 8
2OPERATION AND FITTING INSTRUCTIONS.................................................................................................9
2.1 OPERATING CONDITIONS .................................................................................................................. 9
2.2 ELECTRIC INSTALLATION.................................................................................................................... 9
2.2.1 GENERAL INFORMATION FOR ELECTRIC INSTALLATION ........................................................... 9
2.2.2 WIRING FOR: OKCE 100 S/2,2 kW, OKCE 125 S/2,2 kW .......................................................... 10
2.2.3 WIRING FOR: OKCE 160 S/2,2 kW, OKCE 160 S/3-6 kW, OKCE 200 S/2,2 kW, OKCE 200 S/3-6
kW, OKCE 250 S/2,2 kW, OKCE 250 S/3-6 kW, OKCE 300 S/1 MPa , OKCE 400 S/1 MPa, OKCE 500 S/1
MPa 10
2.2.4 WIRING FOR: OKCE 300 S/1MPa, OKCE 400 S/1 MPa , OKCE 500 S/1MPa, OKCE 750 S/1MPa,
OKCE 1000 S/1MPa.................................................................................................................................. 14
2.3 PLUMBING FIXTURE......................................................................................................................... 16
2.4 FURTHER INFORMATION ................................................................................................................. 17
2.5 PUTTING THE HEATER INTO OPERATION ........................................................................................ 17
2.6 HEATER CLEANING AND ANODE ROD EXCHANGE........................................................................... 18
2.7 SPARE PARTS.................................................................................................................................... 19
3SERVICING OF THERMOSTAT................................................................................................................... 19
3.1 SERVICING........................................................................................................................................ 19
3.1.1 SERVICE DEVICES OF HEATERS ................................................................................................ 19
3.1.2 TEMPERATURE SETTING .......................................................................................................... 20
3.2 FUNCTIONAL DEFECTS..................................................................................................................... 20
4IMPORTANT NOTICES .............................................................................................................................. 21
4.1 INSTALLATION REGULATIONS.......................................................................................................... 21
4.2 DISPOSAL OF PACKAGING MATERIAL AND FUNCTIONLESS PRODUCT ........................................... 21
5 ASSEMBLY GUIDE FOR ZIP-FASTENER INSULATION ................................................................................ 22

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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
OKCE line water heaters use only electricity for heating. Their nominal performance provides sufficient
amount of hot water for flat units, premises, restaurants, and similar establishments.
1.2 PRODUCT DESCRIPTION
The heater tank is welded from a steel sheet; it is entirely coated with hot water resistant enamel. For
additional corrosion protection a magnesium anode is mounted in the upper part of the heater to adjust
the electric potential inside the tank, lowing the risk of corrosion. All types have the outlets of hot and cold
water and a circulation opening welded to them. The tank is insulated with 65 mm of polyurethane foam.
The heater shield consists of a steel, powder-paint coated, sheet; the connecting parts are metal coated.
For heaters 100 – 125 l is a flange welded onto the upper bottom of the receptacle with a flange lid
screwed to it. A sealing ring is inserted between the flange lid and the flange.
Thermo wells for the safety thermostat sensors and capillar thermometer installation are placed in the
flange lid. Wiring is placed under the plastic removable cover. Under a plastic cover on the side of the
heater, there is a cleaning and revision opening ended with a flange; various performance heating units
may be mounted into the opening. The heater is to be placed on the ground.
Tanks between 100 and 250 litres are tested with the pressure of 0.9 MPa; 300 litre tanks are tested with
1.5 MPa.

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TYP OKCE 100 S/2,2 kW OKCE 125 S/2,2 kW
A881 1046
B521 621
1.3 CONSTRUCTION AND GENERAL HEATER DIMENSIONS
OKCE 100 S/2,2 kW, OKCE 125 S/2,2 kW
Figure 1

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OKCE 160 S/2,2 kW, OKCE 200 S/2,2 kW, OKCE 250 S/2,2 kW
OKCE 160 S/3-6 kW, OKCE 200 S/3-6 kW, OKCE 250 S/3-6 kW
Figure 2
OKCE 300 S/1 MPa
Figure 3
TYPE OKCE 160 S/2,2 kW OKCE 200 S/2,2 kW OKCE 250 S/2,2 kW
A1052 1362 1542
B969 1281 1465
C526 861 1065
D168 168 168
E82 82 82
F265 265 265
TYPE OKCE 160 S/3-6 kW OKCE 200 S/3-6 kW OKCE 250 S/3-6 kW
A1052 1362 1542
B969 1281 1465
C526 861 1065
D227 227 227
E82 82 82
F297 297 297

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OKCE 750 S/1MPa OKCE 1000 S/1MPa
A1998 2025
B1643 1671
C378 386
D1 750 850
D2 910 1010
E1908 1911
F1143 1154
G1638 1646
H943 951
M88 92
N45 45
O288 296
P1473 1511
OKCE 400 S/1MPa OKCE 500 S/1MPa
A304 288
B79 55
C514 380
D650 700
E1194 1264
F1289 1409
G1798 1790
H1919 1903
I245 273
OKCE 400 S/1 MPa, OKCE 500 S/1 MPa
Figure 4
OKCE 750 S/1 MPa, OKCE 1000 S/1 MPa
Figure 5

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1.4 TECHNICAL PARAMETERS
TYPE OKCE 100
S/2,2kW
OKCE 125
S/2,2 kW
OKCE 160
S/2,2 kW
OKCE 200
S/2,2 kW
OKCE 250
S/2,2 kW
OKCE 160
S/3,6 kW
OKCE 200 S/3-
6 kW
OKCE 250 S/3-
6 kW
CAPACITY [l]
100
125
160
220
259
WEIGHT [kg] 42 49
58
72
80
67
81
89
OPERATING
PRESSURE OF
ACCUMULATOR
[MPa]
0,6
MAX
TEMPERATURE OF
HSW [°C]
90
HEATING TIME
FROM 10°C TO 60
°C [h]
2,63,3
4,2
5,8
6,8
2,8 – 1,4
3,9 – 1,9
4,6 – 2,3
Table 1
TYPE
OKCE 300
S/1MPa
OKCE 400
S/1MPa
OKCE 500
S/1MPa
OKCE 750
S/1MPa
OKCE 1000
S/1MPa
CAPACITY [l]
314
395
455
750
1000
WEIGHT [kg]
82
103
121
162
211
OPERATING
PRESSURE OF
ACCUMULATOR
[MPa]
1
MAX
TEMPERATURE OF
HSW [°C]
90
HEATING TIME
FROM 10°C TO 60
°C [h]
depending on the power of built-in heating unit
Table 2

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2OPERATION AND FITTING INSTRUCTIONS
2.1 OPERATING CONDITIONS
The tank shall only be used in accordance with the conditions specified on the power 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 temperature at the place of heater installation must be higher than +2°C; and the room
must not freeze. 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.
If water is strongly calcareous we recommend that any of the common decalcifying devices
was installed with the appliance, or that the thermostat was set to the minimum operating
temperature of 60oC (setting to position “60“) - Figure 18. 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 ELECTRIC INSTALLATION
2.2.1 GENERAL INFORMATION FOR ELECTRIC INSTALLATION
Perform the connection according to the scheme. Factory connection must not be changed! (Figure 7). In
the electric wiring casing remove the partition corresponding with the input wire diameter of φ8 or φ10
(Figure 6). The degree of protection of electric parts of the heater is IP 45. Power input of electric element
is 2000 W.
Figure 6

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2.2.2 WIRING FOR: OKCE 100 S/2,2 KW, OKCE 125 S/2,2 KW
Wiring scheme is attached to the heater wiring on the cover.
Connect, repair and control wiring can be performed only company authorized for this activity.
Professional involvement must be confirmed by the warranty.
The heater is connected to the power supply 230 V/50 Hz movable fixed wire which is equipped with all-
pole disconnecting switch network and circuit breaker (protector).
Wiring scheme:
Figure 7
Mounting – 8 x M10
Figure 8
2.2.3 WIRING FOR: OKCE 160 S/2,2 KW, OKCE 160 S/3-6 KW, OKCE 200 S/2,2 KW, OKCE
200 S/3-6 KW, OKCE 250 S/2,2 KW, OKCE 250 S/3-6 KW, OKCE 300 S/1 MPA ,
OKCE 400 S/1 MPA, OKCE 500 S/1 MPA
Water heater is equipped with a universal electric heating unit with either a set or adjustable heating
elements' performance (except OKCE 300 S/1 MPa). A heating unit consists of a flange, to which one or
three wells for ceramic heating elements and one thermowell are welded (viz. Figure 9, Figure 10, Figure
11). A unit is attached by either 8 M 10 screws with a 168 mm clearance or 12 M 12 screws with a 210 mm
clearance. In the wiring plastic cover, there is a thermostat and a safety fuse; heater operation control light;
and a lead-in wire bushing.

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The sensors must be inserted all the way in; first the thermostat and then the safety
fuse.
The performance of heating unit may be adjusted based on either required heating time or connecting
possibilities of electric energy distribution in the place of use.
Parameters of an electric heating unit for: OKCE 160 S/2,2 kW, OKCE 160 S/3-6 kW, OKCE 200 S/2,2 kW,
OKCE 200 S/3-6 kW, OKCE 250 S/2,2 kW, OKCE 250 S/3-6kW
Type
Performance
(kW)
Voltage (V/Hz)
Build-up
length l (mm)
IP
Protection
Weight
(kg)
Mounting
TPK 168 - 8/2,2 kW 2,2 1 PE-N ~ 230 V/50 Hz 405 IP 44 5 8 x M10
Table 3
For: OKCE 300 S/1 MPa – the heating element has to be additionally purchased
Type
Performance
(kW)
Voltage (V/Hz)
Build-up
length l (mm)
IP
Protection
Weight
(kg)
Mounting
TPK 210 - 12/2,2 kW
2,2
1 PE-N ~ 230 V/50 Hz
440
IP 44
9
12 x M12
TPK 210 - 12/3-6 kW 3 - 4 - 63 PE-N ~ 400 V/50 Hz 440 IP 44 15 12 x M12
TPK 210 - 12/5-9 kW
5 - 7 - 9
3 PE-N ~ 400 V/50 Hz
550
IP 44
18
12 x M12
TPK 210 - 12/8-12 kW
8 - 10 - 12
3 PE-N ~ 400 V/50 Hz
550
IP 44
18
12 x M12
Table 4
After the heater is connected to electric network, the heating element starts heating water. The element is
turned on and off by a thermostat. Thermostat can be set as per your need within the range from 5°C to
74°C. We recommend setting service water to maximum temperature of 60°C. This temperature ensures
an optimal operation of the heater, reduces heat losses and saves electricity. After reaching the
temperature set, the thermostat switches off the electric circuit and thus discontinues water heating. The
control light signals if the element is in operation (light is on) or if it is off (the light goes out).
When shutting the heater out for an extended period, in winter you can set the
thermostat to the snowflake sign preventing the water from freezing, or turn off the
inlet of electricity to the heater.
Connection, repairs, and wiring inspections may only be implemented by company
(person) authorised to such activity. Expert connection must be confirmed on the
warranty certificate.
Installations in bathrooms, laundromats, rest rooms and showers must follow the
applicable standards.
Respect rules of protection against electrical injuries in accordance with current
regulations.
The heater is connected to the electric network using a solid moving conductor with a switch that turns off
all network poles and the circuit breaker (protector).
The degree of protection of electric parts of the heater is IP 44.

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Heating unit – flanges
OKCE 160 S/2,2 kW, OKCE 200 S/2,2 kW, OKCE 300 S/1 MPa
OKCE 250 S/2,2 kW
TPK 168-8/2,2 kW TPK 210-12/2,2 kW
Mounting 8 x M10 Mounting 12 x M12
Figure 9
Figure 10
OKCE 160 S/3-6 kW, OKCE 200 S/3-6 kW,
OKCE 250 S/3-6 kW, OKCE 300 S/1 MPa
TPK 210-12/3-6 kW
OKCE 300 S/1 MPa , OKCE 400 S/1 MPa, OKCE 500 S/1 MPa
TPK 210-12/5-9 kW
TPK 210-12/8-12 kW
Mounting 12 x M12
Figure 11

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Wiring scheme
Notice: Factory connection must not be changed! Cover of wiring with control
Heating unit 2.2 kW Thermostat Heater operation control light
Figure 12
Figure 13
Heating unit 3-6 kW
The 3-6 kW heating unit allows 4 types of connection based on either required time of heating or
possibilities of electric network in the place of use.
TPK 3-6 kW R ~ 1 kW
To achieve chosen performance of the heating unit,
connect the inlet conductor to L1,L2,L3, and N terminal
board and interconnect the clips on the 1-10 terminal
board in accordance with the following schemes:
3 kW 1 PE - N AC 230 V / 50 Hz
3 kW 2 PE - N AC 400 V / 50 Hz
4 kW 3 PE - N AC 400 V / 50 Hz
6 kW 3 PE - N AC 400 V / 50 Hz

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OKCE 300 S/1 MPa, OKCE 400 S/1 MPa, OKCE 500 S/1 MPa
TPK 210-12/5-9 kW
TPK 210-12/8-12 kW
TPK 5-9 kW R ~ 1 kW
TPK 8-12 kW R ~ 1.33 kW
TPK 5-9 kW
5 kW 3 PE - N AC 400 V / 50 Hz
7 kW 3 PE - N AC 400 V / 50 Hz
9 kW 3 PE - N AC 400 V / 50 Hz
TPK 8-12 kW
8 kW 3 PE - N AC 400 V / 50 Hz
10.5 kW 3 PE - N AC 400 V / 50 Hz
12 kW 3 PE - N AC 400 V / 50 Hz
2.2.4 WIRING FOR:OKCE 300 S/1MPA, OKCE 400 S/1 MPA , OKCE 500 S/1MPA, OKCE
750 S/1MPA, OKCE 1000 S/1MPA
Heating units use
Capacity
Flanges size
Time of heating from 10°C to 60°C (hours)
l
mm
8
6
5
4
3
2,5
2
1,5
750
flange ∅150
RDU 18-6
RDW 18-7,5
RDW 18-10
RSW 18-12
RSW-18-15
flange ∅225
SE 377-8
SE 378-9,5
SE 377-11
SE 378-14
SE 377-16
SE 378-19
1000
flange ∅150
RDW 18-7,5
RDW 18-10
RSW 18-12
RSW 18 -15
flange ∅225
SE 377-8
SE 378-9,5
SE 377-11
SE 378-14
SE 377-16
SE 378-19
Capacity Flanges size Time of heating from 10°C to 60°C (hours)
l
Mm
8
6
5
4
3
2,5
2
1,5
300
flange ∅210
RDU 18- 2,5
RDU 18- 3
RDU 18-3,8
RDU 18-5
RDU 18-6
RDW 18-7,5
RDW 18-10
400
flange ∅210
RDU 18- 3
RDU 18-3,8
RDU 18-5
RDU 18-6
RDW 18-7,5
RDW 18-10
RSW 18-12
RSW 18-15
500
flange ∅210
RDU 18-3,8
RDU 18-5
RDU 18-6
RDW 18-7,5
RDW 18-10
RSW 18-12
RSW 18-15
Table 5
Electric heating units REU, RDU a RSW with the reduction flange 210/150 can be assembled in heaters with
volume 300, 400 a 500 litres.
Electric heating units REU, RDU a RSW with the reduction flange 225/150 can be assembled in heaters with
volume 750 a1000 litres.

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Type Performance Connection
Element lenght
( mm )
Weight (kg)
REU 18 - 2,5 2,5 1 PE-N AC 230 V / 50 Hz 450 3
RDU 18 - 2,5 2,5 3 PE-N AC 400 V / 50 Hz 450 3,3
RDU 18 - 3 33 PE-N AC 400 V / 50 Hz 450 3,4
RDU 18 - 3,8 3,8 3 PE-N AC 400 V / 50 Hz 450 3,5
RDU 18 - 5 53 PE-N AC 400 V / 50 Hz 450 3,5
RDU 18 - 6 63 PE-N AC 400 V / 50 Hz 450 3,5
RDW 18 - 7,5 7,5 3 PE-N AC 400 V / 50 Hz 450 3,7
RDW 18 - 10 10 3 PE-N AC 400 V / 50 Hz 450 4
RSW 18 - 12 12 3 PE-N AC 400 V / 50 Hz 530 4
RSW 18 - 15 15 3 PE-N AC 400 V / 50 Hz 630 4,2
SE 377* 8,0-11-16 3 PE-N AC 400 V / 50 Hz 610 8
SE 378* 9,5-14-19 3 PE-N AC 400 V / 50 Hz 610 11,5
*Only for 750 and 1000 litre boilers.
Table 6
Capacity
Time of heating from 10°C to 60°C (hours)
l
8
6
4,5
3,5
3
2,5
2,1
1,8
1,6
1,4
300
TPK
210/2,2
TPK 210/3-
6
TPK 210/3-
6
TPK 210/5-
9
TPK 210/3-
6
TPK 210/5-
9
TPK 210/8 -
12
TPK 210/5 -
9
TPK 210/8-
12
TPK 210/8-
12
Wiring
2,2 kW
3 kW
4 kW
5 kW
6 kW
7 kW
8 kW
9 kW
10 kW
12 kW
Table 7
Capacity
Time of heating from 10°C to 60°C (hours)
l
11,3
8
6
4,7
4
3,4
3
2,6
2,4
2
400
TPK
210/2,2
TPK 210/3-
6
TPK 210/3-
6
TPK 210/5-
9
TPK 210/3-
6
TPK 210/5-
9
TPK 210/8 -
12
TPK 210/5 -
9
TPK 210/8-
12
TPK 210/8-
12
Wiring
2,2 kW
3 kW
4 kW
5 kW
6 kW
7 kW
8 kW
9 kW
10 kW
12 kW
Table 8
Capacity
Time of heating from 10°C to 60°C (hours)
l
14,1
9,8
7,5
6
5
4,2
3,7
3,3
3
2,5
500
TPK
210/2,2
TPK 210/3-
6
TPK 210/3-
6
TPK 210/5-
9
TPK 210/3-
6
TPK 210/5-
9
TPK 210/8 -
12
TPK 210/5 -
9
TPK 210/8-
12
TPK 210/8-
12
Wiring
2,2 kW
3 kW
4 kW
5 kW
6 kW
7 kW
8 kW
9 kW
10 kW
12 kW
Table 9
Reduction flange 210 / 150 Reduction flange 225 / 150
Figure 14
Figure 15

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2.3 PLUMBING FIXTURE
Power water connects to pipes with 3/4“ thread in the bottom part of the heater. Blue –
cold water supply, red – hot water outlet. For potential disconnection of the heater, 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 heater must have a membrane spring loaded with a safety
valve. Nominal clearance of safety valves is defined by standard. 300 l heaters are not
equipped with a safety valve. The safety valve must be easily accessible, as close to the
heater
as possible. The input 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 the branch led above the heater. This allows
easier exchange without having to drain the water from the heater. Safety valves with fixed
pressure settings from the manufacturer are used for the assembly. Starting pressure of a
safety valve must be identical with the maximum allowed heater pressure, and at least 20%
higher than the maximum pressure in the water main (Table 10). 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 membrane from the valve seat and 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 heater shutdown for more than 5 days. Water can drip
from the safety valve through the drain pipe; the pipe must be freely open to the
atmosphere, placed vertically and shall be in an environment free of temperatures below
freezing. When draining the heater, use a recommended drain valve. First, close water
supply into the heater.
Please find necessary pressure values in the table (Table 10). For proper safety valve operation, a backflow
valve must be mounted on the input pipes, preventing spontaneous heater draining and hot water
penetrating back into the water main. We recommend that the hot water distribution from the heater was
as short as possible to minimise heat losses. At least one demountable joint must be mounted between the
tank and every supply pipe. Adequate piping and fittings with sufficiently dimensioned maximum
temperature and pressure values must be used.

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Heaters mustbe provided with a discharge valve
mounted on the cold service water inlet to the
heater for potential disassembly or repair.
When assembling the security equipment, follow
the standard.
SAFETY VALVE
STARTING
PRESSURE
[MPa]
ADMISSIBLE
OPERATING
WATER
HEATER
PRESSURE
[MPa]
MAX
PRESSURE IN
THE COLD
WATER PIPE
[MPa]
0,6
0,6
up to 0.48
0,7
0,7
up to 0.56
1
1
up to 0.8
Table 10
2.4 FURTHER INFORMATION
300-1000 litre capacity heaters are screwed onto the bottom wooden palette with M12
screws. When the heater is released from the palette and prior to its putting into operation,
3 adjustable legs supplied as the product accessories have to be installed. With these legs,
the heater may be positioned vertically to the base, within 10 mm.
2.5 PUTTING THE HEATER INTO OPERATION
After connecting the heater to the water main, electrical power system, and after checking the safety valve
(following the instructions attached to the valve), the heater can be put into operation.
Procedure:
a) Check the water main and wiring. Check proper placement of thermostat sensors. The sensors must
be inserted all the way in; first the operating and then the safety thermostat.
b) Open the hot water valve on the combination faucet.
c) Open the cold water inlet valve to the heater.
d) When the water starts flowing through the hot water valve, the filling of the heater is finished and
the valve needs to be closed.
e) If a flange lid leak is discovered, the flange lid bolts need to be tightened.
f) Fasten the electric installation cover.
g) When commencing operation, flush the heater until the cloudiness in the water is gone.
h) Make sure to fill in properly the warranty certificate.

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Cold Water Inlet Scheme
Figure 16
2.6 HEATER CLEANING AND ANODE ROD EXCHANGE
Repetitive water heating causes limestone sediment on both the tank walls and chiefly the flange lid. The
sedimentation depends on the hardness of water heated, its temperature, and amount of hot water
consumed.
We recommend checking and cleaning the tank from scale, if necessary, inspection and
possible replacement of anode rod, after two years of operation.
The anode lifeis theoretically calculated for two years of operation; however, it changes with water
hardness and chemical composition in the place of use. Based on such an inspection, the next term of
anode rod exchange may be determined. Have the company in charge of service affairs clean and exchange
the anode. When discharging water from the heater, the mixing valve of the hot water tap must be open in
order to avoid creating underpressure that would prevent water discharge.
To prevent formation of bacteria (e.g. Legionella pneumophila) within stack heating it is
recommended, if absolutely necessary, to increase the temperature of HSW periodically
for a transitional period of time to at least 70°C. It is also possible to make use of another
way of HSW disinfecting.

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2.7 SPARE PARTS
- Flange lid - flange lid seal - set of M12 (or M10) bolts
- Thermostat and thermal fuse - Magnesium anode - insulation flange lid
- Control lights with wires - control button for the thermostat - capillary thermometer
- Heating element
When ordering spare parts, give part name, type and type number from the heater label.
3SERVICING OF THERMOSTAT
3.1 SERVICING
3.1.1 SERVICE DEVICES OF HEATERS
Service devices of heaters of 100, 125 l capacity are located under the transparent guard of the control
panel (Figure 17).
Thermostat knob Electric circuit power indicator lamp Tipping transparent guard
Figure 17

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3.1.2 TEMPERATURE SETTING
Water temperature is set by turning the thermostat knob. The desired symbol is adjusted against the fixed
point on the control panel (Figure 18).
Figure 18
Adjusting the thermostat selector to the left backstop does not mean permanent shut off of
the heating element. When the heater is in use without blocking the daily rate, we do not
recommend the temperature to be set above 55°C. The maximum value to select is „ECO“.
3.2 FUNCTIONAL DEFECTS
DEFECT
CONTROL LIGHT
FAILURE
Water in the tank is cold
•
is on
•
Heating element failure
•Some elements are not
heating
Water in the tank is not
warm enough
•
is on
•Failure of one of the
elements
•Failure of one of the heating
coils in the element
Water in the tank is cold
•is not on
•Thermostat failure
•The safety fuse turned off
electricity supply
•Power supply outside the
heater discontinued
Water in the tank does
not correspond with
temperature set
•
is on
•Thermostat failure
Lower temperature range
(about 5°C)
Fixed point on the control
panel
Anti-freezing temperature
(about 8°C)
Upper temperature range
(about 74°C)
„Ideal“ temperature
(about 55°C)