Installation Of The Air/Flue Gas Lines - Wolf COB-2 Operation Instructions Manual

Planning
4.6.1 Installation of the air/flue gas lines
Air/flue gas lines - general
Discuss any installation questions, particular those relating to the installation of inspection covers and
vents, with the local flue gas inspector.
Route the air/flue gas lines over the heat generator in such a way that the displacement device can be
removed.
Minimum clearance above the heat generator:
– COB-2-15/-20/-29: 30 cm
– COB-2-40: 40 cm
Air / flue gas routing via roof (type C33x)
Routing air / flue gas above the roof is permitted under the following conditions:
– Heat generator is located in the attic.
– Heat generator is located in a room where the ceiling is also the roof.
– There is nothing above the ceiling but the roof structure.
If there is nothing above the ceiling but the roof structure, the following applies for the combustion air
supply and the flue from the top edge of the ceiling to the roof skin:
Fire resistance
Required
No specific
requirements
Air / flue gas routing via shaft
If multiple floors are bridged by the lines for the combustion air supply and the flue, these lines must
be routed in a shaft outside of the installation room. If this is not done, there is no guarantee of any
mechanical protection. Fire resistance must be guaranteed for at least 90 minutes.
Air / flue gas routing via existing shaft
Cleaning and inspection not possible from the outlet.Make sure that the following clearance is maintained
between the cleaning and inspection opening in the shaft/channel and the front edge of the flue:
– 2 • diameter of flue
– Maximum 350 mm
► Provide sufficient cleaning and inspection apertures.
Ducts which were previously connected to an oil or solid fuel boiler must be cleaned by the chimney
sweep so that no dust remains. If the combustion air is drawn in via the shaft, the prior use can cause
odours in the boiler room.
Dust-free cleaning not possible:
► Use separate air supply.
Securing the air/flue gas routing outside of the shaft
WARNING
Risk of falling parts!
Physical injury and damage to objects.
► Lines must be secured with brackets every 150 cm.
Secure the air/flue gas routing or flue outside ducts with spacer pipe brackets to prevent the pipe joints
being pulled apart.
Minimum clearance of 50 cm:
– From the connection to the heat generator
– Before or after bends
Protection in winter
WARNING
Risk of water vapour becoming ice and falling off!
Physical injury and damage to objects.
► Use appropriate measures on site to mitigate this risk, e.g. installation of a suitable snow guard.
At low outside temperatures, the water vapour contained in the flue gas may condense and freeze on the
air/flue gas routing system.
20 | WOLF GmbH
Measures
Clad any lines with non-combustible materials which also have this fire resistance.
Lines must be laid in a shaft made of non-combustible rigid materials or a metal
conduit (mechanical protection).
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