Technical data
Technical documentation 
Technical documentation
STZS ed 06/03 
14 
ZEUS SUPERIOR
FLUE CIRCUIT 
 - OPERATION 
The combustion residues, after investing the water-gas exchanger (1), are conveyed to a hood (3) at 
the top of which is a draught diverter (4). 
Operation of the fan ensures forced extraction of the flues and at the same time creates a vacuum in 
the sealed chamber (2) that permits extraction of the combustion air from outside. 
Correct flue extraction is controlled by a differential pressure switch (5), operation of which enables 
or does not enable burner ignition. 
- AIR/FLUE SAMPLING TRAPS (6-7) 
The top outer part of the chamber features two 
sumps with screw closing accessible from the 
front and through which combustion air (6) and 
flues (7) can be extracted. 
- FLUE PRESSURE SWITCH 
SIGNAL PRESSURE POINT (8-9) 
The top outer part of the sealed chamber 
features two pressure points with screw closing 
for measuring the signal at the ends of the flue 
pressure switch (5). 
The negative pressure point (8) is linked 
through a Y-pipe to the top of the draught 
diverter and to the negative pressure point of 
the flue pressure switch. 
The positive pressure point (9) is directly linked 
to the inside of the sealed chamber. 










