4 Description of the product
4.1
General description
IX 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 or chimney type connection.
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
Circulating pump
Important
The benchmark for the most efficient circulating pumps is EEI ≤
0.20.
4.2.2
Gas/air setting
The casing fitted to the boiler is also used as an air box. Air is drawn in by
the fan and gas injected into the Venturi by the fan intake. The fan speed
is modulated according to the settings, the heat demand 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 optimum
combustion over the entire output range. The gas/air mixture is sent to the
burner, located upstream of the heat exchanger.
4.2.3
Low-loss header (accessory)
1 Low-loss header kit
Low-loss headers are available for all boiler outputs.
The low-loss header is a component which enables the primary circuit and
secondary circuit to have a hydraulic system independent from the boiler
installation.
It offers the following advantages:
It creates a hydraulically neutral point.
It ensures the primary flow rate is controlled.
It allows good control of the secondary flow rate and pressures,
particularly when several circuits are operating independently from one
another.
It provides the option of having secondary circuits at different
temperatures.
It allows air to be evacuated thanks to its degassing function
It enables decanting and removal of sludge via the sludge removal
function.
Fig.6
MW
-3
0
0
0
1
4
4
-0
4
1
4 Description of the product
18
IX
7702703 - v04 - 05092019
