11
for the technician
Installation instructions
Hydraulic connections
Remark: If gas cock position is foreseen near the
WALL, install first gas cock, then water inlet
tap.
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
reductions 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.
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 in the heating system, and reduce the flow od hot water
available from the boiler.
If pressure is higher, a PRESSURE REDUCER must be fitted 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.
So, may be necessary 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 appliance data plate.
— 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 cannot
be held responsible for any damage arising from that situation.
Make sure that the hydraulic and heating systems ducts are not used as earth
connections of the electrical system. They are absolutely NOT SUITABLE for such a
use.
CONNECTION EXAMPLE
