Hermann Supermicra 23 E, Instruction Manual

Page: 12 / 44

12 Installation
for the technician
CONNECTION EXEMPLE
Hydraulic connections
ADVICES AND SUGGESTIONS TO AVOID
VIBRATIONS AND NOISES IN THE SYSTEM
— Do not use pipes with reduced diameters;
— Do not use bends with small radius and re-
ductions of important sections;
— It is recommended an hot washing of the
system
in order to purge the pipes and the
radiators from impurities (in particular oils and
fats) that
could damage the pump.
PUMP’S SPEED
The pump has a selector which allows
to reduce the speed, so as to reduce
the noise produced by the too rapid cir-
culation of the liquids in too small heat-
ing systems.
DOMESTIC WATER SUPPLY
The pressure of entrance cold water inlet pressure must be lower than 6 bar. Furthermore, for an
optimal boiler functioning, water pressure should be more than 1 bar. A lower pressure could make
difficult to restore correctly the pressure of 1 bar in the heating system, and reduce the flow od hot
water available from the boiler.
In case of stronger pressure it is necessary to install a PRESSURE REDUCER upstream
the boiler.
The cleaning frequency of the coil exchanger depends on the water supply hardness. Besides, the
presence of solid residuals or impurities in the water (for example in case of new systems) could
compromise the correct functioning of the boiler.
However, it is possible to install suitable water treatment device, depending on the water features.
HEATING SYSTEM
— Considering that during boiler operation, the water inside the heating system increases its
pressure, make sure that its maximum value does not exceed the maximum hydraulic pressure
indicated on the technical data.
— Connect the safety evacuation ducts of the boiler to an evacuation funnel. If safety valves are
not connected to an evacuation device, their intervention could flood the room. Hermann can-
not be held responsible for any damage arising from that situation.
Make sure that the hydraulic and heating systems ducts are not used as earth con-
nections of the electrical system. They are absolutely NOT SUITABLE for such a use.
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