Prior to installation Exhaust-air mode The exhaust air is discharged upwards through a ventilation shaft or directly through the outside wall into the open. D Exhaust air must not be discharged via a smoke or exhaust gas flue which is already in use or via a shaft which is used for ventilating rooms in which fireplaces are located. Discharge exhaust air in accordance with official and statutory regulations (e.g. national building regulations). Discharge of air into smoke or exhaust air flues which are not in use requires the consent of a heating engineer. D If the extractor hood is operated in exhaust-air mode at the same time as a flue-type heater (e.g.
gas, oil or solid-fuel heater, instantaneous water heater, boiler), ensure that there is an adequate air supply which the heater requires for combustion. Safe operation is possible provided that the partial vacuum in the room in which the heater is installed does not exceed 4 Pa (0.04 mbar). This can be achieved if the combustion air is able to flow through non-lockable openings, e.g. in doors, windows and in conjunction with an air supply/air-intake wall box or by other technical procedures such as reciprocal interlocking. This can be achieved if the combustion air is able to flow through non-lockable openings, e.g.
in doors, windows and in conjunction with an air supply/air-intake wall box or by other technical procedures such as reciprocal interlocking. If the air intake is inadequate, there is a risk of poisoning from combustion gases which are drawn back into the room. An air-intake/exhaust-air wall box by itself is no guarantee that the limiting value will not be exceeded. Note: When assessing the overall requirement, the combined ventilation system for the entire household must be taken into consideration. This rule does not apply to the use of cooking appliances, such as hobs and gas cookers.
The extractor hood can be used without restriction in circulating air mode – with an activated carbon filter. An extractor hood which is operated in exhaust-air mode should be fitted with a one-way flap if there is no one-way flap in the exhaust-air pipe or wall box. If a one-way flap is not supplied with the appliance, you can purchase one from your dealer (see optional accessories in the Instructions for use). Do NOT cut out the inner part of the exhaust-air connection. Fitting the one-way flap: ❑ Insert the two lugs on the one-way flap into the holes in the exhaust-air connection. 23