Manual Constructa cd 969650 (page 12 of 32) (English, German, Dutch, French)

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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.

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.

Exhaust air may be discharged in

accordance with ofﬁcial and statutory

regulations only (e.g. national building

regulations).

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 combustion air can

ﬂow through non-lockable openings, e.g. in

doors, windows and via the air-

intake/exhaust-air wall box or by other

technical measures, such as reciprocal

interlocking, etc.

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 ovens.

Unrestricted operation is possible if the

extractor hood is used in recirculating

mode – with activated carbon ﬁlter.

If the exhaust air is going to be

discharged into the open, a telescopic

wall box should be ﬁtted into the outside

wall.

Connecting a l 150 mm exhaust-air

pipe:

Mount the pipe directly onto the air

utlet on the hood.

Connecting a l 120 mm exhaust-air

pipe:

Attach the reducing connector directly to

the air pipe.

ṇ The complete

installation set can be

obtained from

specialist outlets.

The corresponding

accessory numbers

can be found at the

end of these operating

instructions.

q Attach the exhaust-air pipe to the

reducing connector.

For optimum extractor hood efﬁciency:

hort, smooth air exhaust pipe.

As few bends in the pipe as possible.

Diameter of pipe to be as large as

possible and no tight bends in pipe.

If long, rough exhaust-air pipes,

many pipe bends or smaller pipe

diameters are used, the air extraction

rate will no longer be at an optimum

level and there will be an increase in

noise.

ṇ The manufacturer of the

extractor hoods accepts no liability

for complaints which can be

attributed to the design and layout of

the pipework.

Round pipes:

We recommend

Internal diameter: 150 mm (at least

120 mm).

Flat ducts must have an internal cross-

section that equates to that of round

pipes.

There should be no sharp bends.

l 120 mm approx. 113 cm

l 150 mm approx. 177 cm

If pipes have different diameters:

Insert sealing strip.

For exhaust-air mode, ensure that

there is an adequate supply of fresh air.

Circulating-air mode

q With activated carbon ﬁlter if exhaust-air

mode is not possible.

Preparing the ceiling

The ceiling must be ﬂat and horizontal.

Ensure that the ceiling is capable of pro-

viding a ﬁrm hold for mounting screws

and plugs. The enclosed plugs are sui-

table for concrete and stonework. If the

ceiling is made of any other material,

use appropriate mounting components.

Weight in kg:

Exhaust air Recirculating air

29,5 30,2

We reserve the right to construction changes within the

context of technical development.

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Constructa cd 969650 Manual

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