Dražice OKCV 125 Specification sheet

OPERATING AND
INSTALLATION MANUAL
TANK-TYPE WATER HEATERS FOR
HORIZONTAL MOUNTING
OKCEV 100
OKCV 125 OKCEV 125
OKCV 160 OKCEV 160
OKCV 200 OKCEV 200
Družstevní závody Dražice - strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
Phone.: [phone]
Fax: +420 / 326 370 980
e-mail: [e-mail]

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CONTENTS
1PRODUCT TECHNICAL SPECIFICATION....................................................................................................... 4
1.1 FUNCTION DESCRIPTION ................................................................................................................... 4
1.1.1 OPERATING ACTIVITY................................................................................................................. 4
1.2 ADVICE FOR CUSTOMERS .................................................................................................................. 5
1.2.1 HOT WATER CONSUMPTION ..................................................................................................... 5
1.2.2 ENERGY SAVING......................................................................................................................... 5
1.2.3 EMERGENCY POWER CONSUMPTION ....................................................................................... 5
1.3 DESIGN AND GENERAL HEATER DIMENSIONS................................................................................... 6
2OPERATION AND FITTING INSTRUCTIONS............................................................................................... 10
2.1 OPERATING CONDITIONS ................................................................................................................ 10
2.2 WALL MOUNTING............................................................................................................................ 10
2.3 PLUMBING FIXTURE......................................................................................................................... 11
2.4 ELECTRICAL INSTALLATION.............................................................................................................. 13
2.4.1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION ..................................................... 13
2.5 CONNECTION OF INDIRECT HEATER TO HOT WATER SYSTEM........................................................ 13
2.6 FIRST COMMISSIONING................................................................................................................... 15
2.7 PUTTING OUT OF SERVICE, DISCHARGE .......................................................................................... 15
2.8 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE............................................................ 16
2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES .......................................................... 17
3OPERATION OF THERMOSTAT................................................................................................................. 18
3.1 SERVICING........................................................................................................................................ 18
3.1.1 OPERATING DEVICES OF THE HEATER ..................................................................................... 18
3.1.2 TEMPERATURE SETTING .......................................................................................................... 19
4IMPORTANT NOTICES .............................................................................................................................. 20
4.1 INSTALLATION REGULATIONS.......................................................................................................... 20
4.2 ACCESSORIES AND SPARE PARTS..................................................................................................... 20
4.3 TRANSPORT & STORAGE INSTRUCTIONS ........................................................................................ 21
4.4 DISPOSAL OF PACKAGING MATERIAL AND NON-FUNCTIONING PRODUCT.................................... 21

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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.
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%. 80%.
Product’s reliability and safety is proven by tests implemented by the Engineering Test Institute in Brno.
Made in the Czech Republic.

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1PRODUCT TECHNICAL SPECIFICATION
1.1 FUNCTION DESCRIPTION
The heater is designed for accumulation heating of service water using electricity or thermal
energy via an exchanger (for the combined design only). Water is heated by an electric element
(or a heat exchanger) in an enamelled thermally insulated accumulator 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 tank is then used for the consumption. The tank keeps constant pressure of water
from the water main. 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.
Pressure principle allows hot water withdrawal at any place from the heater (Figure 9, Figure 10)
1.1.1 OPERATING ACTIVITY
a) Water heating by electric energy
After the heater is connected to electric network, the heating element starts heating water. The element is
turned on and off by a thermostat. After reaching the temperature set, the thermostat switches
off the electric circuit and 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). In case of longer operation without using the heated volume,
the thermostat has to be set to position 5°C to 8°C (set the “snowflake” symbol on the thermostat selector)
to avoid its freezing, or electricity supply to the heater has to be switched off. In combined versions,
the stop valve on the inlet to the exchanger has to be closed at the inlet to the heat exchanger
while heating using el. energy, which prevents heating water in the hot water heating system.
b) Service water heating via thermal energy through heat exchanger
Closing valves of the heat exchanger must be opened which ensures heating water flow from the hot water
heating system. Along with a closing valve at the inlet to the heat exchanger, it is recommended to install
an air removal valve, in order to bleed the heat exchanger as needed, in particular before the beginning
of the heating season. The time it takes to heat up using the heat exchanger depends on the temperature
and flow of water in the hot water heating system.

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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
Hot utility water reservoir is insulated by means of top-quality polyurethane foam with zero
CFCs 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.
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.
HEATER TYPE NOMINAL CAPACITY (L) TIME OF CONTENT
HEATING (HOURS)
ELECTRICITY
CONSUMPTION FOR
HEATING THE VOLUME
FROM 15oC TO 65oC (kWh)
OKCEV 100
100
2,6
6
OKCV 125; OKCEV 125
125
3,3
7,5
OKCV 160; OKCEV 160
152
4
9,5
OKCV 200; OKCEV 200
200
5,3
12
Table 1

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1.3 DESIGN AND GENERAL HEATER DIMENSIONS
The heater tank is made of a steel plate and tested by 0.9 MPa overpressure. The heat exchanger is tested
with a pressure of 1.5 MPa. The inside of the receptacle 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. Heater types OKCV
125-200 are produced in the right and left design.
Dimensions of the heaters –Figure 1, Figure 2, Figure 3, Figure 4, Figure 5 and Table 3, Table 4,
Table 5
TYPE
-
OKCV 125
OKCV 160
OKCV 200
OKCEV 100
OKCEV 125
OKCEV 160
OKCEV 200
VOLUME
L
100
125
152
200
MAX OPERATING
OVERPRESSURE IN THE TANK
MPa 0,6
MAX OPERATING
OVERPRESSURE IN THE
EXCHANGER*
MPa - 0,4
ELECTRICAL CONNECTION
V
1 PE-N 230 V/50Hz
INPUT
W
2200
EL. PROTECTION
IP 42
MAX WARM WATER
TEMPERATURE
°C 80
RECOMMENDED WARM WATER
TEMPERATURE
°C 60
HEIGHT OF THE HEATER mm 902 1067 1255 1287
DIAMETER OF THE HEATER mm 524 524 524 584
MAX WEIGHT OF THE HEATER
WITHOUT WATER
kg 42 59/48 67/54 81/71
TIME OF EL. HEATING FROM
10°C TO 60°C*
hrs 2,6 3,3 45,3
LOAD PROFILE
M
L
L
XL
DAILY ELECTRICITY
CONSUMPTION [kWh] kWh 6,54 11,98 12,43 19,88
MIXED WATER V40
L
164,98
195,75
244,59
301,93

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* OKCEV series heaters do not include the heat exchanger.
Table 2
OKCEV 100, OKCEV 125, OKCEV 160, OKCEV 200
Figure 1
Table 3
TYPE
-
OKCV 125
OKCV 160
OKCV 200
EXCHANGER HEAT TRANSFER
SURFACE
m2
-
0,7 0,7 0,75
RATED THERMAL OUTPUT AT
HEATING WATER TEMPERATURE
OF 80°C AND FLOW 720 l/h
W
-
16800 16800 18000
TIME OF HEATING BY
EXCHANGER FROM 10°C TO 60°C
min
-
26 35 43
RATED THERMAL OUTPUT AT
HEATING WATER TEMPERATURE
OF 80°C AND FLOW 310 l/h
W
-
10260 10260 11000
TIME OF HEATING BY
EXCHANGER FROM 10°C TO 60°C
min
-
43 53 72
TYPE
OKCEV 100
OKCEV 125
OKCEV 160
OKCEV 200
A902 1067 1255 1287
B435 600 750 600
C723 928 1060 936
D524 524 524 584
E205 104 254 258
F226 226 226 246
G230 230 230 252
H556 556 556 618
①
neck ¾“ inner

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OKCV 125, OKCV 160 – right design
Figure 2
OKCV 125, OKCV 160 – left design
Figure 3
Table 4
TYPE
OKCV 125
OKCV 160
A
1067
1255
B
600
750
C
928
1060
D
524
524
E
204
204
F
226
226
G
232
232
H
556
556
I
513
649
J
439
439
①
neck ¾“ inner

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OKCV 200 – right design
Figure 4
OKCV 200 – left design
Figure 5
Table 5
TYPE
OKCV 200
A
1287
B
600
C
936
D
584
E
258
F
246
G
256
H
618
I
670
J
439
①
neck ¾“ inner

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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 room, in which
the appliance will be operated, must be frost-free. 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 heater 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 water heater shall only be mounted in horizontal position so that the electrical
installation cover of the heater was placed at least 600 mm from the opposite side.
In combined and electric heaters, elbows have to be attached to the hot service water inlet
and outlet prior to their suspension in brackets right under the ceiling and, by turning these
elbows, mounting left has to be determined - either from the right, or from the left.
With regard to various types of carrying masonry and broad assortment of special anchorage
material available at the market, we do not provide heaters with the anchoring 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.
If the hot water heater is mounted in a tight, small space, or in an intermediate ceiling, etc.,
you have to make sure that the connecting side of the appliance (connections to water
supply, area for electric plugging) remained accessible and no heat accumulation occurs.

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2.3 PLUMBING FIXTURE
Connection of heaters to plumbing fixtures is illustrated in Figure 6, Figure 7.
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. We recommend that the hot water
distribution from the heater was as short as possible to minimise heat losses.
Each hot service water pressure heater must have a safety valve with a membrane spring.
Nominal clearance of safety valves is defined by standard. Heaters are not equipped
with a safety valve. The safety valve must be easily accessible, as close to the heater
as possible. The inlet pipes must have at least the same clearance as the safety valve. 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 heater. 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 heater pressure, and at least 20 % higher
than the maximum pressure in the water main (Table 6).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 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 heater 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 heater, use the recommended drain valve. First, close the water supply
into the heater. For proper safety valve operation, a backflow valve shall be mounted
on the inlet pipes, preventing spontaneous heater draining and hot water penetrating back
into the water main.
Required pressures – Table 6
Table 6
SAFETY VALVE STARTING
PRESSURE (MPa)
ACCEPTABLE OPERATING OVER-
PRESSURE OF THE WATER
HEATER (MPa)
MAX COLD WATER PRESSURE IN
PIPING (MPa)
0,6
0,6
up to 0.48
0,7
0,7
up to 0.56
1
1
up to 0.8

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Heaters must be provided with a discharge valve mounted on the cold service water inlet to the heater
for potential disassembly or repair.
OKCV 125, OKCV 160, OKCV 200
Figure 6
OKCEV 100, OKCEV 125, OKCEV 160, OKCEV 200
Figure 7
U – closing valve
P – safety valve with backflow flap
M – Manometer
Z – test valve
V – drain valve
O – deaerating valve
U – closing valve
P1 – safety valve with backflow flap
P2 – safety valve for heating circuit
M – Manometer
Z – test valve
V – drain valve

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2.4 ELECTRICAL INSTALLATION
2.4.1 GENERAL INFORMATION FOR ELECTRICAL INSTALLATION
•
The electric wiring scheme is attached to the water heater on the side of the electric
installation guard (Figure 8).
•Connection, repairs, and wiring inspections may only be implemented by a company
(person) authorised to such activity.
•Expert connection must be confirmed on the warranty certificate.
•The heater is connected to the 230 V/50 Hz electrical network using a fixed 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 42.
Figure 8
2.5 CONNECTION OF INDIRECT HEATER TO HOT WATER SYSTEM
It is recommended to install stop valves on the heating water inlet and outlet (for possible
dismantling of the heater).
The valves have to be as close to the heater as possible to avoid
higher thermal losses. (Figure 6, Figure 7, Figure 9and Figure 10).

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Figure 9
Figure 10

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2.6 FIRST COMMISSIONING
After connecting the heater to the water supply, the hot water heating system, the electric
network, and after testing its safety valve (based on the valve manual attached), the heater
may be put into operation. Before opening the power supply, the tank must be filled
with water. The process of first heating must be executed by licensed professional who has
to check it. Both the hot water outlet pipe and safety armature parts may be hot.
During the heating process the pressurised connection water that increases its volume
due to heating must drip off the safety valve. In non-pressurised connection water drips off
the overflow combination faucet. When heating is finished, the set temperature
and the actual temperature of consumed water must be more-or-less the same.
After connecting the heater to the water main and electrical power system, and after
checking the safety valve (following the instructions attached to the valve), the heater can
be put into operation.
Procedure of putting the heater into operation:
1. Check both water and electric installation; for combined heaters, check the installation to a hot
water heating system. Check proper placement of operating and safety thermostat sensors.
The sensors must be inserted all the way in; first the operating and then the safety thermostat.
2. Open the hot water valve on the combination faucet.
3. Open the cold water inlet valve to the heater.
4. As soon as the water starts running through the hot water valve, the heater is filled and the valve
can be closed.
5. In case of leakage (of flange lid), we recommend that the flange lid bolts are fastened.
6. Screw down the electric installation guard.
7. When hot sanitary water is heated by electric energy, switch on the power supply (the valve on the
heating water inlet to the heating insert must be closed in combined heaters).
8. When sanitary water is heated with electric energy from the hot water heating system, turn off
electricity an open the valves on the heating water inlet and outlet, possibly de-aerate
the exchanger.
9. When commencing operation, flush the heater until the cloudiness in the water is gone.
10. Make sure to fill in properly the warranty certificate.
2.7 PUTTING OUT OF SERVICE, DISCHARGE
If the hot water heater is put out of service for a longer time, or if it is not going to be used
it has to be drained and disconnected from the electric supply network on all poles.
The switch for the supply lead or the fuse cut-outs have to be shut off.
At places with permanent risk of frost the hot water heater must be drained before the cold
season starts if the appliance remains out of service for several days and if the power supply
is disconnected.

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Drainage of utility water shall be performed after closing the shut-off valve in the cold water
supply piping (through the discharge valve for safety valve combination),
and with simultaneous opening of all hot water valves of connected fittings. Hot water may
outflow during the drainage! If there is a risk of frost it has to be considered that not only
the water in the hot water heater and in the hot water piping may get frozen but also
the water in the entire cold water supply piping. It is therefore advisable to drain all fittings
and piping that carry water, up to the part where the house water meter is installed
(connection of the house to water main) which is not jeopardised by frost. When the tank is
to be used again, it has to be filled with water and one needs to make sure that the water
flowing out at the hot water valves did not contain any bubbles.
2.8 INSPECTION, MAINTENANCE & CARE FOR THE APPLIANCE
During the heating process the water that increases its volume during the heating must drip
off the safety valve outlet (in non-pressurised connection this water drips off
the combination faucet valve). In full heating (about 65oC) the volumetric water gain is
approx. 3% of the tank capacity. The function of the safety valve has to be checked regularly
(based on the information contained in the attached safety valve manual). In common
operation, such a check needs to be implemented at least once a month, and after each
heater shutdown that exceeds 5 days.
Caution! In doing so, the cold water supply pipe and the connection fitting of the tank may
get heated! If the hot water heater does not work, or if hot water is not withdrawn,
no water shall drip off the safety valve. If water drips, then the pressure in the supply piping
is either too high, or the safety valve is defective. Please call a specialised plumber
immediately!
If water contains too many minerals, an expert has to come to remove the scale that forms
inside the tank, as well as free sediments. This has to be performed after one or two years
of operation. Repeated heating causes lime scale settling on the receptacle walls and mostly
on the lid of the flange. Lime scale settling depends on hardness of heated water,
its temperature and on the volume of hot water used.
We recommend checking and cleaning the tank from scale and eventual replacement
of the anode rod after two years of operation. The anode life is 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 a company in charge of service affairs deal
with the cleaning and exchanging of the anode.
When discharging water from the heater, the mixing valve battery for hot water must be
open in order to avoid creating underpressure that would prevent water discharge. Cleaning
is carried out through the hole in the flange by: draining the boiler, dismantling the flange lid
and cleaning the tank. A new sealing has to be used for re-fitting. Since the inside
of the heater has special enamel, the surface of which must not get in contact with a scale
removing agent – do not work with a lime pump.Remove the lime layer with a timber
and suck it off, or wipe it off with a clout. After that, the appliance must be rinsed thoroughly
and the heating process is checked the same as during the initial putting in operation.
Do not use any abrasive cleaning agents or dye thinners to clean the outer shell of the heater
(such as cellulose thinner, trichlor, and the like). For cleaning use a wet clout and add
a few drops of liquid cleaning agent for household applications.

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2.9 MOST FREQUENT FUNCTION FAILURES AND THEIR CAUSES
Other possible defects – Table 7
FAILURE SYMPTOM
INDICATOR
SOLUTION
Water is cold
•
Light on
•
The temperature set
on the thermostat is too low
•Heating element failure
Water is cold
•Light off
•no supply cable
•Thermostat failure
•Safety thermostat shut off
probably due to failed
operation thermostat
Water is not warm
enough
•
Light on
•
failure of one of the coils
in the element (contains 2)
Temperature of water is
not corresponding with
the set value
•Light on
•Defective thermostat
Water is constantly
dripping off the safety
valve
•Light off
•high input pressure
•defective safety valve
Table 7
Do not attempt to repair the failure yourselves. Seek either expert or service help. It does
not take much for an expert to remove the defect. When making a repair appointment,
report the type and serial number you find on the performance plate of your water heater.

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3OPERATION OF THERMOSTAT
3.1 SERVICING
3.1.1 OPERATING DEVICES OF THE HEATER
Electrical installation cover for heaters OKCEV 200, OKCV 200
Thermostat knob Electric circuit closing indicator lamp Tipping plastic guard
Figure 11
Electrical installation covers for heaters OKCEV 100, OKCEV 125, OKCEV 160, OKCV 125, OKCV 160
Thermostat knob Electric circuit closing indicator lamp
Figure 12
Thermostat and no other part of the control panel is not a bearing part which can be
used for any handling with the heater.

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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 solid
mark on the control panel.
Figure 13
Figure 14
Adjusting the thermostat knob to the left backstop does not mean permanent shutoff
of the heating element. When the heater is in use without blocking the daily rat
e, we do not
recommend the temperature to be set above 55°C. Select the "ECO“ symbol
as the maximum.
Lower limit of technical
scope (around 5°C)
Temperature to prevent
freezing (around 8°C)
Fixed mark on control
panel
Upper limit of technical
scope (around 80°C)
Optimum temperature
(around 55°C)
Lower limit of technical
scope (around 5°C)
Fixed point on control panel
Temperature to prevent
freezing (around 8°C)
Upper limit of technical
scope (around 74°C)
Optimum temperature
(around 55°C)

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4IMPORTANT NOTICES
4.1 INSTALLATION REGULATIONS
-Without a confirmation of performed electrical installation issued by an authorised company,
the warranty certificate shall be void.
-Check and exchange the Mg anode regularly.
-You have to apply for approval of a local power supplier to connect the heater.
-No stop valves can be put between the heater and the safety valve.
-If the overpressure in the water main exceeds 0.48 MPa, a pressure control valve must be mounted
before the safety valve.
-All hot water outputs must have a combination faucet.
-Before filling the heater with water for the first time, it is recommended to fasten the flange
connection nuts of the tank.
-It is not allowed to handle the thermostat, aside from temperature resetting with a control button.
-All electric installation handling, adjustment and replacement of the regulation elements shall only
be performed by an authorised service company.
-The thermal fuse must not be turned off! In case of thermostat defect, the thermal fuse interrupts
electric power input to the heating element if the water temperature in the heater exceeds 90 °C.
-As an exception, the thermal fuse may also switch off due to water overheating caused
by overheating the hot water heating system boiler (in case of a combined heater).
-We recommend you operate the heater with one type of energy.
-If you don't use the heater (hot water tank) for longer than 24 hours, or if the facility with heater is
unattended, close the cold water inlet to the heater.
-The heater (hot water tank) shall be used exclusively in accordance with the conditions specified
on the performance plate and in the instructions for electric wiring.
Both the electric and water installation must follow and meet the requirements
and regulations relevant in the country of use!
4.2 ACCESSORIES AND SPARE PARTS
The product is supplied with a safety valve, elements to be used for suspension of the heater on the wall,
i.e. a bracket (bended stiffened tubes). The above parts are packed and placed in the packaging in the top
part of the heater. Also additional fastening elements – hinges – can be purchased with the heater.
It is a set of two hinges and bolts to fasten them to the heater, and an earthing bolt. The catalogue number
of this set is 102000702.
It is in your own interest to check the completeness of the accessories.