Operating Principle - REMEHA GAS 210 ECO PRO Notice D'utilisation

5. Technical specifications

5.3 Operating principle

34
The inlet side of the fan is fitted with a venturi, where air and
gas are mixed according to a fixed ratio. When there is a heat
demand, the fan will pre-vent. The fan draws in the combustion air,
which is mixed with the gas to optimum effect in the venturi. The
fan moves the homogenous gas/air mixture through to the burner.
The mixture is then ignited by the combined ignition and ionisation
electrode, which also monitors the flame. Combustion then takes
place. Following combustion, the hot flue gases pass through the
cast aluminium heat exchanger. Here, the flue gases release their
heat to the heating water in the heat exchanger. The heat output
of the boiler is controlled on the basis of the settings and the pre-
vailing water temperatures that are measured by the temperature
sensors. With flue gas temperatures below dew point (approx. 55°,
the temperature at which the water vapour in the flue gases starts
to condense), the water vapour in the flue gases will condense in
the lower part of the heat exchanger. The heat released during this
condensation process (called latent heat or heat of condensation)
is also transferred to the heating water. The condensed water is
discharged through a trap. The flue gases flow through the con-
densate collector and are discharged via the flue gas discharge
pipe.
The advanced control system of the boiler, the abc
tees extremely reliable heat supplies. This means that the boiler
responds quickly and efficiently to negative environmental influ-
ences (such as hydraulic flow problems, air flow problems, etc.). If
problems of this kind occur, the boiler will not lock out, but initially
modulate down and, depending on the nature of the problem,
switch off temporarily (shutdown or control stop) and try again
after a pre-determined time. Providing the situation is not hazard-
ous, the boiler will always continue to attempt to provide heat. For
a continuous supply of heat, the boiler requires a minimum flow
of 30 % of the nominal water flow at the relevant design tempera-
tures. The boiler can be equipped with a second return (available
as an accessory). The second return can contribute additional effi-
ciency if the installation includes different temperature groups.
GAS 210 ECO PRO
, guaran-
®
114500-090211