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by the company responsible for the installation and connection of the heater
design. It is mandatory to install all supplied and/or recommended by this
company safety, control and coolant movement management devices.
WARNING! It is prohibited to fit stop valves on heat exchanger both ends
(inlet and outlet) simultaneously. In cases where the water heater heat
exchanger shall not be used and is not connected to the heat source
circuit, it must be filled with propylene glycol solution suitable for heating
systems.
Connecting the heat exchanger of the water heater to an alternative heat
source circuit must be completed only by qualified technicians in the field
from a company specializing in such services and in accordance with the
design.
WATER HEATER CONNECTION TO THE POWER
SUPPLY NETWORK
WARNING! Do not proceed to connect the water heater to the power
supply network unless you have made sure that its water tank is full with
water! Check!
The water heater is an appliance with protection degree against current
damages Class I, which requires its compulsory connection to the earthling
circuit of the power supply installation.
The water heaters models electric circuit schema are shown on Fig. 7-9.
The electric power supply of the water heaters is 230 V~ and should be
performed by a separate current circuit of insulated three-core supply cable
with a cross-section of each of the wires of 2,5 mm (phase, neutral and
grounding). Therefore if the in-wall cable is two-wire, a qualified electrician
must add a third, protective conductor with no interruption on its track from
the switchboard to the water heater. If the earthling conductor/wire has
intermediate connections, latter must be secured against loosening.
Otherwise the appliance shall not be correctly earthed and it shall reduce its
safety.
WARNING! IT IS COMPULSORY that in the electric circuit feeding the
heater is installed such a device which in the conditions of over voltage
category III provides full disconnection of all poles. The conductors
between the circuit and the device incoming electrical terminals must not
be interrupted by any circuit breaker or fuse. Should the water heater be
installed in premise with shower cubicle and/or bath the disconnecting
device must be located outside.
All the extremities of wires in the appliance circuit must be properly
connected to the main power switchboard and in the heater connection point
to the power supply grid. In the phase circuit it is obligatory to install an
electric fuse 10 А for water heater electric capacity up to 2 kW and 16 A for
electric capacity of 3 kW. The electric installation to which the heater will be
connected must be built in accordance with the requirements of the
applicable statutes and local regulations in force. Where the regulations in
force do not require that in the water heater circuit be installed an automatic
breaker against leakage of current (residual current protection device), we
recommend to install such a device.
The connection of the cables from the mains switchboard to the unit
terminals shall be carried out after carefully removing the plastic cover so
that the electrical wiring in the unit does not disengage. In accordance with
electric circuit schema glued on the cover connect the phase conductor of
the power wire to the terminal marked L (or A1 depending on the
modification), the neutral wire to the terminal marked N (or B1) and the
earthling – to the security terminal (screw or stud) marked for protective
earthing. The power cord must be secured against displacement by using
the cable clamp located next to the cable hole in the plastic cover. After
connecting and attaching the power cable, put the plastic cover into place
and secure it with screws, taking care for free movement of cables,
thermostat capillary tube and the control switch.
If you have purchased water heater with pre-installed power cord with a
plug, the electric connection shall be carried out as the plug in put directly in
a functioning and grounded socket of the premise electric installation. The
socket should be on a separate, dedicated only for the water heater circuit
and located so as to be easily accessible after the unit installation. The
section of the electric installation wires in which the socket is placed must be
suitable for the water heater electric power consumption. On the phase line
must be installed a fuse (10 A for a capacity of 2 kW and 16 A for 3 kW). The
installation must be carried out in compliance with the regulations in force.
Taking out the power cord plug from its socket shuts down the water heater.
Faulty and / or inappropriate electric installation and / or socket are high-risk
conditions for accidents with damages to the product and possible damages
to the environment, objects and living species.
Once the appliance is connected to the power supply grid check its
functionality.
WARNING! Failure to comply with the requirements concerning
connection to the mains shall impede the appliance safety, in which it is
prohibited to use. Adverse effects occurring as a result of non-
compliance with requirements concerning the appliance electric
connection are not covered by the manufacturer and seller warranty
liabilities and are at the expense of the party violating the requirements of
this instruction manual.
Only qualified persons are entitled to connect the water heater to the mains
and to check its functionality.
HOW TO USE THE APPLIANCE
The water heater is switched on operative mode by switching the rocker of
the illuminated rocker switch by pressing its extremity marked „І". With the
knob you may adjust to desired water temperature. Lighting of the rocker
when in switched on position indicates that the water heater is operating and
water is heating, while when the light is off it indicates that the water has
2
reached adjusted temperature and the heater is switched off. You may
switch off the appliance by pressing the end of the rocker of the illuminated
switch marked "0". The water heater complete disconnection from power
supply takes place from the additional disconnecting device.
For models marked with the letter "D" each rocker on the double-rocker
illuminated switch located on the control dashboard serves to switch on/off
one of the heaters. Thus you may use appliance half or full electric power
depending on the specific needs and desired time for water heating.
Modifications with letters "WG" and "WDG" in their model numbers are not
equipped with built-in switch. They are included/excluded in/from operating
mode using the external device. In the plastic cover of these devices is
mounted signal lamp (LED) that shines while the electric heating element
works.
Modifications with letter/s "W" in their number are equipped with rocker
switch without LED indication. It is located on the bottom of the appliance, in
the central part of the plastic cover and is used for turning on/off the device
to/from operation mode of the heating element. The built-in LED indicator
located above the hand wheel of the thermostat indicates when the heating
element is working.
The appliance built-in thermostat unit has antifreeze function. When the
thermostat knob is to the extreme left, at the scale beginning, the heater
shall switch on at ambient temperature around 8-10 °C and shall switch off
at about 12-15 °C. Thus in case of air temperature fall in the room, the water
in the tank will be protected from freezing. ATTENTION! This feature shall
not prevent the water in the room plumbing from freezing!
There is a sector marked ECO on the graphics around thermostat knob.
When the knob mark is in the ECO sector area the water is heated to optimal
temperature with redused thermal losses and with lower electrical energy
consumption. At the same time the heated water is enough for domestic use.
When greater volume of mixed water is needed the thermostat knob should
be set to maximum setting for reaching higher temperature of the water in
the water heater. We recommend the knob to be set to ECO when the water
heater is being switched on for extended periods of time with no warm water
consumption only for storing the heated water.
Switching on and off, set up and using water heaters equipped with electronic
control board takes place in accordance with the instructions and requirements
listed in the additional manual supplied with the appliance – instruction how to
connect and use an appliance with electronic control board. For such appliances
the additional instruction manual is an integral part of the present installation and
operation manual.
The thermometer installed on the appliance external coating indicates the
process of water heating. It is not a measurement device and indicates only
16
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