4 Description of the product
4
POWER HT + floor-standing condensing gas boilers have the following
characteristics:
Low pollutant emissions
High efficiency heating
Electronic control panel
Flue gas discharge by a forced flue, chimney or bi-flow type connection.
Perfectly suitable for cascade systems with several boilers.
4.2 Operating principle
4.2.1 Gas/air setting
The casing fitted to the boiler is also used as an air box. Air is sucked in by
the fan and gas injected into the Venturi by the fan intake. The fan speed
is modulated according to the settings, the thermal energy requirement
and the actual temperatures measured by the temperature sensors. The
gas and air are mixed in the Venturi. The gas/air ratio command function
accurately adjusts the quantities of gas and air required. This provides op
timum combustion over the entire output range. The gas/air mixture is sent
to the burner, located upstream of the thermal exchanger.
4.2.2 Low-loss header (accessory)
The low-loss header is used to prevent interaction between the dynamic
pressures within the boiler and the heating circuits. Thanks to the low-loss
header, the dynamic pressures of the circulation pumps on the various cir
cuits are only added or subtracted to a lesser extent.
4 Description of the product
7609474 - v02 - 04092014 17
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