Description Of The Product; General Description; Operating Principle; Circulating Pump - Potterton SIRIUS THREE FS 130 Installation, User And Service Manual

4 Description of the product

4 Description of the product
4.1

General description

4.2

Operating principle

Boiler model
SIRIUS THREE FS 130
SIRIUS THREE FS 150
SIRIUS THREE FS 200
SIRIUS THREE FS 250
20
Sirius three FS floor-standing condensing gas boilers have the following
characteristics:
Low pollutant emissions
High efficiency heating
Electronic control panel
Flue gas discharge by a concentric connection.
Perfectly suitable for cascade systems with several boilers.
4.2.1

Circulating pump

Important
The benchmark for the most efficient circulating pumps is EEI ≤
0.20.
4.2.2

Gas/air setting

Operating principle
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 ac­
curately 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.
An air intake hose conveys the air directly to the air intake nozzle on the venturi
inlet.
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 ac­
curately 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.
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