Supply Of Combustion Air - Contura C i5 Installation Instructions Manual

Supply of combustion air

For optimum function and efficiency a supply air
connection(accessory) is recommended via a separate channel.
The air can be supplied indirectly via a vent in the outer wall, or
directly through a duct from outside.
The connector on the supply air connector has an outer diameter
Requirements for the chimney
• The cassette meets the requirements for connecting to
chimneys dimensioned for 350 °C flue gas temperatures.
• The connection sleeve's outer diameter is 125 mm.
• The cassette requires a draft in the chimney of at least
–12 Pa. The draft is affected both by the length and area
of the chimney, and by how well sealed it is. The minimum
recommended chimney length is 3.5 m and suitable cross-
sectional area is 120-175 cm² (125-150 mm in diameter).
of Ø67 mm. When duct routing further than 1 m the pipe diameter
must be increased to 100 mm and a correspondingly larger wall
vent must be selected. The amount of air needed for combustion is
approx. 20 m3/h.
• A flue with sharp bends and horizontal routing reduces the
draught in the chimney. The maximum horizontal flue is 1 m,
on the condition that the vertical flue length is at least 5 m.
• It must be possible to sweep the full length of the flue and the
soot doors must be easily accessible.
• Carefully check that the chimney is sealed and that there is no
leakage around soot doors and flue connections.
GB
INSTAllATION 101