Bedienungsanleitung Bielmeier BHG41 (Seite 14 von 23) (Deutsch, Englisch)

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Appropriate use

Clean the extractor hood thoroughly prior to ﬁrst use. As is the case prior to any other cleaning and servicing, pull the

power plug or disable the circuit breaker to disconnect the unit from power.

Lamps can become very hot when operated. Disconnect the extractor hood from power and allow lightbulbs to

cool down before replacing lightbulbs!

The extractor hood should only be operated with installed lightbulbs. Always switch on the extractor hood

when using a stove top burner. Condensate can form if the hood is switched oﬀ, potentially resulting in

corrosion damage on the equipment.

An extractor hood is not a shelf! Do not place objects on the extractor hood..

FIRE HAZARD

You should neither ﬂambee nor work with an open ﬂame under the hood. The ﬂames can be pulled into the ﬁlter

by the airﬂow created when the extractor hood is switched on, in which case the deposits on the grease ﬁlter can

ignite. Fire hazard!

The extractor hood must only be installed above ﬁreplaces that can create a ﬁre hazard due to airborne sparks if

the ﬁreplace has a closed, non-removable enclosure and in all cases meets country-speciﬁc regulations.

Never leave pots, pans, and fryers unattended when preparing meals with oil and grease, such as French fries.

Oil and grease are easily ignitable!

Regularly cleaning the grease ﬁlter and changing the activated carbon ﬁlter routinely will mitigate a ﬁre hazard.

The extractor hood must never be operated without a grease ﬁlter.

OPERATING MODES – EXHAUST AIR AND RECIRCULATING AIR

Instructions for exhaust air mode

Exhaust air is evacuated to the outside either upward by an air duct or directly through an exterior wall.

NOTE: The exhaust air must be discharged neither through an operational smoke or exhaust chimney nor

through a duct used to ventilate installation rooms for ﬁreplaces. The approval of a competent chimney sweep

specialist must be obtained before the exhaust air can be routed through a non-operational smoke or exhaust

chimney. The regulatory and statutory regulations must be observed when discharging exhaust air (for example

regional construction codes). A telescoping wall sleeve should be used when the exhaust air is routed through

the exterior wall.

The extractor hood achieves its best possible performance with a short, straight exhaust pipe and the largest

possible pipe diameter. If pipe bends cannot be avoided, the radii should be made as large as possible.

In exhaust air mode, it is particularly important that the air volume collected from the room can be made up

unrestricted. The otherwise resulting negative pressure can substantially reduce the extraction performance.

The pressure equalization steps required for this purpose are mandatory in this case. This is either accomplished

with an appropriate makeup air opening with at least the same cross-section as the exhaust air opening or by

using a window switch that only allows the extractor hood to be operated when the

window is opened and/or tilted.

Diverters and reductions

Turbulence and backﬂows are created on reductions and diverters. These can further reduce the backpressure and

increase the noise proﬁle, while also reducing the eﬃciency of the extractor hood. The use of at least one elbow is

generally unavoidable. However, as a general rule, the fewest possible number of diverters should be used, while re

ductions and sharp angles should be avoided whenever possible. For instance, the use of two bends with large radii

(> 90°) results in a far lower airﬂow performance reduction than one 90° elbow. However, the installation must always

take into account that diﬀerent individual resistances are created depending on the shape of round pipe, hoses

and ﬂat duct, diverters and reductions. These are cumulative and result in a reduction of the airﬂow volume and in

increased operating noise. We therefore recommend keeping the line as short and straight as possible and using the

lowest possible number of reductions, and taking the location and design of the exhaust airline into consideration

when specifying the airﬂow volume.

DIN EN 6191 deﬁnes a metering arrangement for determining performance, which speciﬁes an exhaust airline

typically used in practice, along with the resulting backpressures. The following pipes are connected to the exhaust

ﬂange of the hood:

- a vertical pipe section with a length of 300 mm

- a 90° elbow

- a horizontal pipe section with a length of 1000 mm

NOTE: Using long, rough exhaust air pies, many pipe bends, or pipe diameters below 150 mm results in a variance

from the optimal air output and in increased noise levels. The exhaust air line must only be routed using pipes and

hoses made from non-combustible materials. The manufacturer of the stove hoods assumes no warranty liability

for claims in connection with the planning and layout of the pipe assembly.

Pipe connections

The diameter of the exhaust pipes should not be below 150 mm.

Round pipes: We recommend an inner diameter of 150 mm, and min. 120 mm.

Flat ducts must have the same inner cross section as round pipes. They should not have sharp changes in direction.

Ø 150 mm approx. 177 cm

Ø 120 mm approx. 113 cm

Sealing strips should always be used for deviating pipe diameters.

Diameter of exhaust pipe connection: 150 mm (recommended size)

Attach the exhaust air directly on the air pipe ﬂange and seal appropriately. Smooth out the interface area ﬁrst

when using aluminum pipes.

Bielmeier BHG41 Seite 14

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