Install The Exhaust Duct - Novy Flat'Line 7640 Operating And Installation Instructions

MOUNT THE REMOTE MOTOR UNIT
The motor unit of the model 7645, 7655, 7665 is mounted remotely from the chimney hood. A choice can be made
between an internal motor (type 245999) or an external motor for outside mounting (type 445999). With an external motor
the minimum distance between the hood and the external motor must be 5 metres. The hood is connected to an earthed
wall socket. The hood and the motor unit are electrically connected by means of a 6-pole plug connection. Additional
information can be found in the mounting instructions of the motor involved.

INSTALL THE EXHAUST DUCT

The exhaust of the hood must be properly taken care of. For optimum performance of the hood it is important to pay
attention to the following items during the installation:
• Use smooth, non-flammable pipes with an internal diameter that is equal to the external diameter of the connection
nozzle of the hood. Maximally extend flexible ducts and cut them to size.
• Do not reduce the exhaust diameter. This will lower the capacity and raise the noise level.
• Make the duct as short as possible and with as few as possible bends to the outside.
• Avoid square bends. Use rounded bends for proper air conduction.
• Flat duct: the surface of a flat duct must be the same size as Ø150 mm = 177 cm².
• In case of an exhaust pipe through the outside wall passing a cavity wall, make sure that the exhaust duct fully
bridges the cavity and slightly declines to the outside.
• When connecting to a short exhaust duct, it may be required to mount a non-return valve in the duct to avoid wind
blowing in.
• Use a hose clamp or aluminium tape for airtight connections.
• In case of an exhaust pipe through the roof, use a double-walled roof passage with sufficient width.
• Never connect to a flue duct.
• Make sure that sufficient air is supplied. Fresh air can be supplied by slightly opening a window or an outside door or
by installing an inlet grate.
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