Drazice HA-DR 155 Betriebs- und Installationshandbuch - Seite 7
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Safety instructions of the manufacturer
The product assembly and commissioning must be performed by professional company! Unprofessional assembly
is not permitted!
The manufacturer is not responsible for defects caused by unprofessional assembly and mechanical damage
(natural disasters, violent damage, etc.) occurred after the product sale.
During the product commissioning, observe the instructions on the assembly and operating manual.
All repair works must be performed by an employee from an authorised service.
After removing the heater cover, there is a risk of injury from electric current!
Do not touch live parts!
If the power cord is damaged, it must be replaced by authorised service according to the respective EN standards
in order to prevent any risk.
The product must be located according to the respective EN safety standards.
The product must be connected via the current protector (RCD) with residual current not exceeding 30 mA.
The product must be protected with fast disconnection from electrical network.
The product is included in the group of workshop repairs!
Important notices prior to the assembly
Deaerate the heater prior to connection in electrical network, i.e. open the hot water valve for approx 2 minutes,
it prevents the damage of the heating spiral.
Burning the heating spiral by insufficient deaerating is not within the scope of warranty works.
After every aerating of the water pipes (during water shutdown, maintenance) it is necessary to disconnect
the heater from electrical network and deaerate!
The heater can be installed solely with the outlets facing downward!
The manufacturer recommends to install water softener in front of the heater (mechanical, electrical, or magnetic)!
The manufacturer bears no responsibility for damage caused by limescale or mechanical contamination in water.
The manufacturer does not recommend installing the filter against mechanical contamination in water!
The manufacturer recommends to perform regular cleaning of the inlet filtration screen on the heater flange!
Protect the heater from freezing - it prevents its damage!
In case of freezing, do not commission the heater - it prevent the burning of the heating spiral!
The dynamic water pressure must comply with the values specified in the parameter table!
Water heater must be connected to the safety earthing according to local EN standards!
Water heater must be connected to the current protector with the difference current max.30mA, according
to EN standards!
The measuring resistance at 15°C temperature must not be below 1300Ωcm, according to the respective
EN standards!
The manufacturer shall not be held liable for the stability of electric network. In case of fluctuations, contact
the respective branch of power plants! (Voltage fluctuation between 180 and 240V will not damage the heater.
It shall be reflected solely by performance, e.g. voltage drop by 5% reduces the heater performance by 10%).
The load from maximum water pressure is 6 bar (0,6 MPa).
The heater is constructed for the connection directly to the water main.
The connection directly to the system must include the heater protection with the safety valve up to 0,6 Mpa.
The manufacturer recommends to secure the cold water supply to the heater with a valve, which in case of longer
shutdown (exceeding 2 days) enables the heater to shutdown from full water pressure.
Electric installation must follow and meet the requirements and regulations relevant in the country of use.
CAUTION: If water flow fluctuates causing the heating temperature to fluctuate, it is caused e.g. by domestic pumping units
and different pressure between switching off and on the expansion vessel pressurising. The regulation valve will remove
the problem (e.g. Honeywell D04-1 / 2A), assembled on the pumping unit outlet which provides constant pressure and flow.