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water tank. It is carried out the following order:
џDisconnect the heater from the electrical power supply network with
the optional device and for greater security disconnect the fuse in the
heater phase circuit.
џCut the cold water access to the appliance - close the stop cock, pos. 4
from Fig. 8.
џOpen the hot water cock on the tap or disconnect the tank hot water
pipe (outlet pipe) connection.
џLift the lever of the combined valve 5 in Fig. 8 and wait until the water
stops flowing out of the valve opening.
These steps do not still secure the complete draining of the water out of the
tank. It is completed only by a qualified person because it requires complete
disconnection of the appliance electric circuit and dismantling the water tank
flange.
WARNING! IT IS STRICTLY PROHIBITED to turn on the heater power
while the water tank is partially or completely emptied of water! Do not
forget to fill the tank with water before putting it back into operation.
WARNING! The coolant circulation through the heat exchanger of a
water heater equipped with such device is PROHIBITED when the water
tank is partially or completely emptied of water.
WARNING! When draining the water out of the water tank all necessary
precautions must be taken to prevent damages from flowing out water.
CONNECTING THE HEAT EXCHANGER OF
WATER HEATER TO THE ALTERNATIVE HEAT
SOURCE CIRCUIT
The water heater with heat exchanger must be connected to the alternative
heat source in accordance with the special additional instructions provided
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. 10-14.
The electric power supply of the water heater is 230 V~ and is performed by a
separate current circuit of insulated three-core supply cable with a cross-
2
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 version),
the neutral wire to the terminal marked N (or B1) and the earthling - to the
security terminal (screw or stud) marked for safety grounding. The power
cord must be secured against displacement by using the cable clamp
located next to the cable entry 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.
The water heater connection to the power supply and checks of its
functionality shall be performed only by specialists and are not manufacturer
or seller obligations and are not subject to warranty service.
HOW TO USE THE APPLIANCE
The water heater is switched on operative mode by switching the light key by
pressing its extremity marked „І”. With the knob you may adjust to desired
water temperature. Lighting of the key 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 reached adjusted temperature
and the heater is switched off. You may switch off the appliance by pressing
the end of the button of the glowing key 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 key on the two-buttons light key
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.
The models 722xxW(WN;WD;WND) (Fig. 1c) are provided with a switch,
and next to the thermostat knob – with a light indicator. The latter shows the
water heater operation. The 722xxWG(WNG) models do not have a switch
and are therefore switched on/off operating mode with the additional device
to disconnect the unit from power supply.
The chart around the thermostat knob has a distinct sector marked ECO.
When the cursor of the knob is in the sector, the water is warmed to an
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