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CAHA Midi
Installation, Usage and Maintenance Instructions
6.5.5 INSTALLING FLUE -EXHAUST AND AIR INLET
6.5.5.1 GENERAL
• Do not use materials from different manufacturers for either exhaust or air inlet
• Only the manufacturers of flue way and air inlet components as mentioned in this manual may be used
•
Both systems (exhaust and air) should be mounted free of tension
CONDENSATE, ICE-FREE TERMINAL, TUNDISH AND U-TRAP
The boilers can produce flue gasses with very low temperatures, which can lead to condensation in the flue pipes and flue
terminal. Therefore one should always mount an ice free terminal. Drain the condensate via a tundish and a U-trap to the
sewer.
AIR INLET
If PP material is used for the air inlet a minimum distance of 35 mm between exhaust and air inlet should be respected.
The minimum insert length of the sleeve, leaf catcher or pipe must be 40 mm.
FLUE EXHAUST
A horizontal flue gas (exhaust) pipe must be installed with a fall of 3° (50 mm per mtr) downwards towards the boiler to
allow condensate to flow back in the sump or condensate collector.
The minimum insert length into the sleeve and the minimum length of the pipe end for aluminium and stainless steel must
be 40 mm.
If PP is used pay attention to the expansion (elongation) of the PP due to rise in flue gas temperature.
Insert the PP pipe into the sleeve and redraw over a length of 10 mm ( 10 mm for maximum pipe length of 2 mtr).
After mounting the minimum insert length into the sleeve and the pipe end must be 40 mm.
CONDENSATE TRAP/COLLECTOR
The condensate trap/collector must be either connected by
a tube to a syphon that provides the same height of water column as the one supplied with the boiler or by a T-piece to the
syphon as supplied with the boiler
Note:
The chimney pieces (silencers) that are delivered with the boiler need to be mounted correctly as shown in the fig
-
ures beneath
For 6,7 and 8 section boilers one silencer must be mounted with its sticker as shown in the first figure below. For the 5
section boiler two silencers must be mounted with its sticker as shown overleaf.