Manual Bosch DHL 505 B (page 24 of 100) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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Exhaust-air mode

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 ovens.

All legal requirements concerning the

discharge of exhaust air must be observed.

Unrestricted operation is possible if the

extractor hood is used in recirculating mode

– with activated carbon filter.

The extractor hood should be fitted with a

one-way flap for exhaust-air mode if there is

not already one installed in the exhaust-air

pipe or wall box. If a one-way flap is not

enclosed with the appliance, purchase one

from a specialist outlet (see optional acces-

sories on the last page).

Attaching the one-way flap

❑ Insert the two lugs on the one-way flap

into the holes on the air-pipe connector

or air outlet and lock into position.

ṇBefore installing the one-way flap, ensu-

re that the lettering or stamp is on the out-

side.

Prior to installation

The exhaust air is discharged upwards

through a ventilation shaft or directly

through the outside wall into the open.

Exhaust air should neither be directed

into a smoke or exhaust flue that is

currently used for other purposes, nor into a

shaft that is used for ventilating rooms in

which stoves or fireplaces are also located.

Local authority regulations must be

observed when discharging air into smoke

or exhaust flues that are not otherwise in

use.

When the extractor hood is operated

in exhaust-air mode simultaneously with

a different burner which also makes use

of the same chimney (such as gas, oil or

coal-fired heaters, continuous-flow heaters,

hot-water boilers) care must be taken to

ensure that there is an adequate supply

of fresh air which will be needed by the

burner for combustion.

Safe operation is possible provided that the

underpressure in the room where the

burner is installed does not exceed 4 Pa

(0.04 mbar).

This can be achieved if the combustion air

can be replenished by being able to flow

through non-closeable openings such as in

doors, windows, wall ventilation boxes, or

by alternative technical measures such as

reciprocally shutting the other device off,

etc.

An air-intake/exhaust-air wall box by itself is

no guarantee that the limiting value will not

be exceeded.

5750.197 457+458.Bo/Si.qxd 24.01.2005 10:08 Uhr Seite 24

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Bosch DHL 505 B Manual

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