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DESCRIPTION AND PRINCIPLE OF OPERATION
IV.
The appliance consists of a body, flange at the bottom side (for water
heaters intended for vertical mounting) or at the sides (for water
heaters intended for horizontal mounting), protective plastic panel and
a safety-return valve.
1.
The body consists of a steel reservoir (water tank) and a housing
(outer shell) with thermal insulation placed in-between made of
ecologically clean high density polyurethane, and two pipes with
thread G½'' for cold water supply (marked by a blue ring) and hot water
outlet pipe (marked by a red ring).
The inner tank may be made of steel protected from corrosion by a
special glass-ceramic or enamel coating.
The vertical water heaters may be equipped with a built-in heat
exchanger (boiler tube). The boiler tube's entrance and exit are located
at the sides and represent pipes with thread G ¾".
2.
An electric heater is installed to the flange. Water heaters with glass-
ceramic coating are equipped with a magnesium protector as well.
The electric heater is used for heating the water in the tank and is
operated by the thermostat, which automatically maintains the set
temperature. The device has a built-in overheating safety device
(thermal circuit breaker), which switches off the heater from the
electrical mains when the water temperature reaches excessive values.
3.
The safety-return valve prevents the appliance's complete emptying
if the cold water supply stops from the water mains. The valve protects
the appliance from pressure increases higher than the allowed value
during heating mode (an increase of temperature causes water
expansion and therefore pressure increase) by releasing the excess
pressure through the drainage opening.
The safety-return valve cannot protect the appliance in the event
of water mains pressure that is higher than the pressure stated for
the appliance.
MOUNTING AND SWITCHING ON
V.
ATTENTION! IMPROPER INSTALLATION AND CONNECTION OF THE
APPLIANCE WILL MAKE IT HAZARDOUS WITH GRAVE HEALTH
CONSEQUENCES AND MAY CAUSE EVEN DEATH OF USERS. IT MAY ALSO
DAMAGE THEIR PROPERTY, THAT OF THIRD PARTIES, AS A RESULT OF
FLOODING, EXPLOSION, FIRE. Installation, connection to the water mains
and connection to power lines must be carried out by qualified
technicians. A qualified technician means a person who has appropriate
competencies pursuant to the regulations of the relevant state
Mounting
1.
We recommend the device to be mounted in close proximity to locations
where hot water is used in order to reduce heat losses during transportation
in the pipelines. If the device is mounted in a bathroom, it should be in such
a place so as not to be poured with water from the showerhead or a portable
showerhead attachment.
For wall-mounting, the appliance must be affixed to a wall by means of the
mounting brackets attached to the unit's body. Wall-mounting is carried out
by means of two hooks (min. Ø 10 mm) set firmly in the wall (not included in
the mounting set). The mounting bracket's construction designed for water
heaters intended for vertical mounting is universal and allows a distance
between the hooks of 220 to 310 mm (fig. 1a).
In order to prevent injury to the user and/or third persons in the
event of faults in the system for hot water supply, the appliance
must be installed in premises with floor hydro insulation and drainage to
the sewerage. Under no circumstances should you place objects which
are not waterproof under the appliance. If the appliance is installed in
premises without floor hydro insulation, a protective tub with drainage to
the sewerage must be in place under the appliance.
Note: The set does not include a protective tub and it should be
chosen/purchased by the user.
Connecting the water heater to the water supply system
2.
Fig. 4: a – for vertical installation
Where: 1 - Inlet pipe; 2 - safety valve; 3 - reducing valve (for pressure in the
water mains higher than 0.6 MPa); 4 - stop valve; 5 - funnel connected to
the sewerage; 6 – hose; 7 – drain water tap.
Upon connecting the water heater to the water mains you must consider
the indicative colour markings (rings) affixed to the pipes: blue for cold
(incoming) water, red for hot (outgoing) water.
The mounting of the safety return-valve supplied with the water heater
is obligatory. The safety return-valve must be mounted on the cold water
supply pipe, in accordance with the direction of the arrow stamped on its
body, indicating the direction of the incoming water.
Exception: If the local regulations (norms) require the use of
another protection valve or device (which conforms to EN 1487 or
EN 1489), then it must be purchased additionally. For device operating in
accordance with EN 1487 the declared maximum operational pressure
must be no more than 0.7 MPa. For other protection valves, the pressure
at which they are calibrated must be 0.1 MPa lower than the one marked
on the appliance's plate. In these cases the safety valve which the
appliance is supplied with should not be used.
Other type of stopping armature is not allowed between the
protection return valve (the protective device) and the appliance.
English
The presence of other (old) safety return-valves may lead to a
breakdown of your appliance and they must be removed.
The attaching of the safety return-valve to threads longer than 10
mm is not allowed; otherwise this may damage the valve and
therefore pose danger to your appliance.
For water heaters for vertical mounting, the safety valve has to be
connected to the incoming pipe with the safety plastic panel of
the appliance being taken off. After installing the appliance it should be in
the position shown in Fig.2.
The safety-return valve and the pipe between the valve and the
water heater must be protected from freezing. In case of hose
draining its free end must be always open to the atmosphere (not to be
immersed). Make sure that the hose is also protected from freezing.
To fill the water heater with water first open the hot-water tap of the
water-mixing faucet. Then open the cold-water tap of the water-mixing
faucet. The appliance is full when a constant stream of water flows from
the water-mixing faucet. Then close the hot water tap.
When you have to empty the water heater, first you must cut off its
power supply. Then stop feeding water to the appliance. Open the hot-
water tap of the water-mixing faucet. Open tap 7 (fig. 4) in order to drain
the water from water tank. If there is no such tap built in the pipeline,
the water heater can be drained directly from the inlet pipe of the water
tank, having it disconnected from the water mains prior to this
When removing the flange, it is normal for several litres of water, which
have remained in the water tank, to be discharged.
Measures must be taken to prevent damages by the discharged
water.
If the pressure in the water mains piping exceeds the value specified
in paragraph I above, a pressure-reducing valve must be installed,
otherwise the water heater will not be correctly operated. The
manufacturer will not bear any liability for problems arising from
improper operation of the appliance.
Connecting the water heater to the electrical mains
3.
Make sure the appliance is full of water before switching on the
electrical power supply.
3.1.
For models with a power cord with a plug, connection to the
electrical mains is done by inserting the plug into an electrical
socket.
Disconnection from the electrical mains is done by unplugging the
power cord from the socket.
The electrical socket must be properly connected to a separate
current loop that is provided with a safety fuse. It must be earthed.
3.2.
Water heaters with a power supply cord without a plug
The appliance has to be connected to a separate current loop of the
stationary electrical installation, and also it has to be provided with a
safety fuse with nominal current of 16A (20A for power > 3700W). The
connection has to be permanent – with no plug connectors. The current
loop has to be provided with a safety fuse and with an inbuilt device
which would disconnect all poles in case of category III overvoltage.
The connecting of the conductors of the supply cord of the appliance
has to be carried out in the following way:
•
conductor with brown insulation – to the phase conductor of the
electrical installation (L)
•
conductor with blue insulation – to the neutral conductor of the
electrical installation (N)
•
conductor with yellow-green insulation – to the safety conductor of
the electrical installation ⏚.
3.3.
Water heaters without power cord
The appliance has to be connected to a separate current loop of the
stationary electrical installation, provided with a safety fuse with
nominal current of 16A (20A for power > 3700W). Connection is done
using copper single core (rigid) conductors – cable 3 x 2.5 mm² for a
total power of 3000W (cable 3 x 4.0 mm² for power > 3700W).
In the electrical circuit providing power supply for the appliance there
has to an inbuilt device which would disconnect all poles in case of
category III overvoltage.
To install the power supply wire to the water heater, remove the plastic
cover (Fig.2a).
Connect the power supply wire in compliance with the marking on the
terminals, as it follows:
•
the phase – to marking A or A1, L or L1;
•
the neutral – to marking N (B or B1 or N1)
•
The safety wire must be connected to the screw joint marked with ⏚
After installation, put the plastic cover back in its place!
Explanations to Fig. 3:
TS - thermal circuit breaker; TR/EC - thermal regulator/ electronic
control; R – heating element; F - flange; S - sensor
EN
7
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