LF21BB550 - Range hood SIEMENS - Free user manual and instructions

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SIEMENS LF21BB550 - Range hood
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Product type Cooker hood
Brand Siemens
Model LF21BB550
Dimensions (W x D x H) 90 cm x 50 cm x 45 cm (approx.)
Weight 15 kg (approx.)
Power supply 230 V ~ 50 Hz
Motor power 300 W (approx.)
Lighting LED, 2 x 3 W
Noise level 55 dB(A) (normal level)
Maximum extraction capacity 700 m\u00b3/h (approx.)
Extraction mode External extraction or recirculation
Filter type Metal grease filter (washable) + activated charcoal filter (optional)
Control Touch electronic
Functions 3 speeds + intensive, delayed shut-off, filter saturation indicator
Maintenance Clean metal filter in dishwasher, replace charcoal filter every 6 months
Safety Automatic safety shut-off in case of overheating

Frequently Asked Questions - LF21BB550 SIEMENS

How to install the Siemens LF21BB550 hood?
Installation must be carried out by a qualified professional. Ensure that the diameter of the exhaust duct is compliant and that the hood is securely fixed to the wall or ceiling. Observe safety distances from the cooking surface.
How to clean the grease filters?
The metal grease filters can be cleaned in a dishwasher at 65°C or by hand with warm soapy water. Dry them thoroughly before reinstalling.
When should the charcoal filter be replaced?
The charcoal filter must be replaced every 6 months under normal use, or more often if the hood is heavily used. It is not washable.
How to reset the filter saturation indicator?
After cleaning or replacing the filters, press the delayed shut-off button for about 3 seconds until the indicator light goes off. Refer to the manual for details.
The hood is making an unusual noise, what to do?
Check that the filters are properly in place and clean. Make sure no object is obstructing the duct. If the noise persists, contact customer service.
How to adjust the hood speed?
Use the touch keys to select the desired speed: 1 (low), 2 (medium), 3 (high) or the intensive function for strong odors.
Can the hood be used in recirculation mode?
Yes, the hood can operate in recirculation mode with an activated charcoal filter (not supplied with the appliance). An exhaust duct is then not required.
What to do if the LED lighting does not work?
First check that the LEDs are properly engaged. If they do not light up, contact customer service as the LEDs are not user-replaceable.
How to contact Siemens customer service?
You can reach Siemens customer service by phone at 0 800 10 11 12 (toll-free) or via the website. Have your appliance reference number handy.
Where to find spare parts for the LF21BB550 hood?
Spare parts are available from authorized dealers or on the Siemens online store. Use the model number LF21BB550 for the search.

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USER MANUAL LF21BB550 SIEMENS

GAS

ELECTRO

≥ 650 mm

≥ 550 mm

FIRE HAZARD

Technical diagram of a metal frame structure with bolts and a bolt, showing assembly details (no text or labels)

General Information 24

Information on protection of the environment 24

Before using the appliance for the first time 24

Safety Instructions 25

Intended use 25

Technical safety 25

Special information for gas cookers 26

Proper use 27

Correct installation 27

Operating modes 28

Exhaust-air mode 28

Circulating-air mode 28

Operation 29-35

Cleaning and Care 36

Removing and installing the grease filters 37

Removing and installing the metal-mesh grease filters 37

Installing and removing the activated carbon filters 37

Installation instructions 38

Connecting Pipes 38

Electrical Connections 39

Installation 40

Installation preparations 40

Attachment 41

Installing the flue ducts 42

INFORMATION ON PROTECTION OF THE ENVIRONMENT

Disposal of transport packaging

Your new appliance was sent to you in protective packaging. All utilised materials are environmentally safe and recyclable. Please help us by disposing of the packaging in an environmentally friendly manner.

Packaging parts can be hazardous for children. Therefore keep them outside the reach of children.

Disposal of the old appliance

Old appliances are not worthless rubbish. Valuable raw materials can be reclaimed by recycling old appliances.

This appliance is identified according to the European Directive 2002/96/EC on waste electrical and electronic equipment – WEEE). The directive specifies the framework for an EU-wide valid return and re-use of old appliances.

Simple line drawing of a trash bin with no text or symbols.

Before disposing of your old appliance, render it unusable.

Never treat your old appliance as non-recyclable waste!

Please ask your dealer or inquire at your local authority about current means of disposal.

Ensure that the old appliance is kept childproof until it is disposed of.

BEFORE USING THE APPLIANCE FOR THE FIRST TIME

NOTE: These operating instructions apply to several appliance models. It is possible that individual features are described which do not apply to your appliance.

Before switching on your new appliance, please read the operating instructions carefully. They contain important information on safety and how to use and look after the appliance.

Keep the operating instructions in a safe place and pass them on to any subsequent owner of the appliance.

Faults

Please contact customer service regarding any queries or faults.

(See list of customer service centres).

When calling, please quote:

E-no. FD

The numbers can be found on the rating plate, after removal of the grease filter, inside the extractor hood.

Enter the numbers in the above fields.

Intended use

▷ This extractor hood complies with the stipulated safety regulations. Improper use may result in injury or damage. The extractor hood may be used in the household only. The manufacturer is not liable for damage which is caused by improper use or incorrect operation. The manufacturer cannot be made responsible for damage which can be attributed to non-observance of the safety instructions.

RISK OF INJURY

Do not allow children to play with the extractor hood! Adults and children must never operate the appliance unsupervised

  • if they are not physically or mentally capable of doing so, – or if they do not have the knowledge and experience to operate the appliance correctly and safely.

Technical safety

The extractor hood left the factory in perfect condition. Nevertheless check the appliance for visible damage before installation. If it is damaged, do not switch it on! ▷ If the power cord of the extractor hood is damaged, it must be replaced by the manufacturer, his customer service or a similarly qualified person to prevent hazardous situations. ▷ Only a qualified technician may install (including electrical connection), service or repair the extractor hood. Always isolate the extractor hood by pulling out the mains plug or switching off the fuse!

▷ If the appliance is improperly installed, serviced or repaired, the user may be placed in considerable danger for which the manufacturer is not liable. Changes to the electrical or mechanical installation are dangerous and must not be undertaken! They may also cause the extractor hood to malfunction.

Simultaneous operation of the extractor hood with a heating appliance which is dependent on ambient air

▷ Heating appliances which are dependent on ambient air, e.g. gas, oil, wood, or solid-fuel heaters, instantaneous water heaters, hot water boilers, hobs or ovens, and which draw combustion air out of the installation room and whose exhaust gases are conveyed to the exterior by a flue.

RISK OF POISONING

If the extractor hood is operated at the same time as a heating appliance which is dependent on ambient air, there is a risk of poisoning due to combustion gases being drawn back in.

Safety warning symbol and diagram showing a skull hazard and a gas stove with airflow arrows.

▷ Safe operation is possible provided the low pressure in the installation room of the heating appliance does not exceed 4Pa (0.04mbar). This can be achieved if the combustion air can flow through non-closable openings, e.g. in doors, windows, in conjunction with air intake/exhaust air wall boxes or by other technical measures.

Diagram showing a checkmark over a circular icon and a schematic of a gasifier or heat exchanger system (no text or symbols).

▶ Adequate intake air must therefore always be provided. ▷ An intake/exhaust air wall box alone does not ensure compliance with the limit value.

NOTE: When making your evaluation, always consider the entire ventilation system in the home. Include the advice of a competent heating engineer when making your evaluation.

▷ If the extractor hood is used in circulating air mode only, it can be operated without any restrictions.

Special information for gas cookers

When installing the extractor hood above gas hobs, observe the appropriate national statutory regulations (e.g. in Germany: Technische Regeln Gasinstallation TRGI). Observe the currently valid installation regulations and instructions of the gas appliance manufacturer. During installation, ensure that only one side of the extractor hood is situated directly next to a high-sided unit or a wall. Otherwise, there is a risk of heat build-up. The gap between the extractor hood and the wall or high-sided unit must be at least 50 mm.

RISK OF BURNS

Do not operate more than 2 gas cooking areas simultaneously over a period of max. 15 minutes at maximum thermal load. Due to the effect of the heat there is a risk of burns if the surfaces of the housing are touched!

Note that one large burner of more than 5 kW (Wok) is equivalent to the power of 2 gas burners. The extractor hood may be damaged by the intense heat. Never operate a gas cooking area without a cooking utensil on it. Regulate the flame in such a way that it does not project over the cooking utensil.

Proper use

Clean the extractor hood thoroughly before using for the first time.

Before cleaning and servicing the extractor hood, isolate it from the power supply by pulling out the mains plug or switching off the fuse.

Bulbs (especially halogen bulbs) become very hot during operation. Even some time after the appliance has been switched off, there is still a risk of burns!

Before changing bulbs, isolate the extractor hood from the power supply and leave the bulbs to cool down!

Do not operate the extractor hood without bulbs inserted.

Always switch on the extractor hood if a hotplate is being used. If the extractor hood is not switched on, condensation may form. As a result, the appliance may corrode.

Do not place any objects on the extractor hood.

Pure mechanical diagram showing a cylindrical component mounted on a base with a circular cross symbol overlay (no text or labels).

RISK OF FIRE

Do not flambé under the extractor hood or work with a naked flame. When switched on, the extractor hood draws flames into the filter. There is a risk of fire due to deposits on the grease filter!

Do not leave pans, frying pans or deep-fat fryers unattended if you are cooking food with oils or fats, e.g. chips. Overheated oils or fats can easily ignite!

A risk of fire can be prevented by cleaning the grease filters regularly and changing the activated-carbon filter in good time.

Never operate the extractor hood without grease filters.

Correct installation

Check the manufacturer's specifications for the cooker to determine whether an extractor hood can be operated over it. If the manufacturer of the cooker has not specified any significant safety distances, the following minimum distances apply:

  • 550 mm between electric hob and the lower edge of the extractor hood
  • 650 mm between gas hob (upper edge of pan support) and the lower edge of the extractor hood (see figures on page 2). If various cookers are used, the greatest indicated distance applies. The width of the extractor hood must correspond to the width of the cooking area. The extractor hood must not be installed over a solid fuel heating appliance which may be a fire risk (e.g. flying sparks) unless the heating appliance has a closed, non-detachable cover and the country-specific regulations are observed. This restriction does not apply to gas cookers and gas hobs. To avoid damaging the hob, cover it when installing the extractor hood.

The extractor hood can be used in exhaust air and circulating air mode.

Exhaust-air modeSimple line icon of a house with an arrow and crossed-out hand (no text or symbols).

The air which is drawn in is cleaned by the grease filters and conveyed to the exterior by a pipe system.

Appliance dimensions Exhaust airSymbolic icon of a house with crossed hands and arrows, representing a home security or security symbol (no text present).

The air which is drawn in is cleaned by the grease filters and an activated carbon filter and conveyed back into the kitchen.

An activated carbon filter must be installed to bind odours in circulating-air mode (see "Removing and installing the grease filters").

The complete installation set as well as the replacement filters are available from specialist outlets, customer service or the Online Shop. The accessory number can be found at the end of the operating instructions.

Appliance dimensions Circulating airSIEMENS LF21BB550 - Correct installation - 3

Below is an overview of the control panel of your extractor hood. Here you will receive a brief explanation on the individual controls.

Display: on/off, 1, 2, 3, 4. Rotary selector, function buttons.

Function buttons

SymbolFunction

on offSwitch extractor hood on and off
1Switch on fan setting 1
2Switch on fan setting 2
3Switch on fan setting 3
4Switch on fan setting 4 (Intensive setting)
Set fan run-on, run-on time
Light on / off
Set timer
Switch on intermittent ventilation
iPress briefly = request informationHold down = open or close Standard settings menu

Rotary selector

You can use the rotary selector to change suggested and set values. The rotary selector is retractable. To engage and disengage, depress the rotary selector.

The display is divided into different areas:

Status line: direction of rotation display. 13:03 Fan: Level 2. Timer: 00:00 min s. Level 0. Run-on: light. Settings areas.

Status line

The Status line indicates the time, the selected fan mode and the information text.

Settings areas

The settings areas indicate suggested values which you can change. The active settings area is lit.

By pressing the relevant Function button, you can change from one settings area to the next.

Direction of rotation display

° = Turn rotary selector to the right

▼ = Turn rotary selector to the left

If both direction arrows are displayed, you can turn the rotary selector in either direction.

Standard settings

NOTE

Before switching on the appliance, always follow the instructions and warnings in the chapter entitled "Safety instructions".

If required, set the language for the text display. German has been preset.

The changes to the standard settings will not take effect until the extractor hood has been switched off.

Each change can be saved by holding down the i button or deleted by pressing the on/off button.

Change language

  1. Hold down the i button for approx. 3 seconds. The "Standard settings" menu is opened. The "Language" settings area is lit.

Press i button to revert to basic settings. Language: English. Set clock: 0:00.

Set time

  1. Set the language with the rotary selector.
  2. Press the i button to switch to the next settings area.

Duration of acoustic signal

The "Set time" settings area is lit.

  1. Set the time with the rotary selector.
  2. Press the i button to switch to the next settings area.

The "Acoustic signal duration" settings area is lit.

  1. Using the rotary selector, adjust the acoustic signal duration (short, medium or long).
  2. Press the i button to switch to the next settings area.

Button sound

The "Button sound" settings area is lit.

  1. Switch the button sound on or off with the rotary selector.
  2. Press the i button to switch to the next settings area.

Display brightness

The "Display brightness" settings area is lit.

  1. Using the rotary selector, adjust the brightness (night, medium, day).
  2. Press the i button to switch to the next settings area.

Contrast

The "Contrast" settings area is lit.

  1. Using the rotary selector, adjust the contrast.
  2. Press the i button to switch to the next settings area.

Clock display

The "Clock display" settings area is lit.

  1. Using the rotary selector, switch the clock display on and off or select the form of the display.

NOTE

Please note that when the clock display is switched off, there is no display either when the extractor hood is in an idle state or in operating mode.

  1. Press the i button to switch to the next settings area.

Standard settings

Timer

The "Timer" settings area is lit.

  1. Using the rotary selector, set the preferred time.
  2. Press the i button to switch to the next settings area.

Select run-on time

The "Run-on time" settings area is lit.

  1. Set the preferred time with the rotary selector.
  2. Press the i button to switch to the next settings area.

Select intermittent time

The "Intermittent time" settings area is lit.

  1. Set the intermittent time with the rotary selector.
  2. Press the i button to switch to the next settings area.

Exhaust air / circulating air

The extractor hood can be used in exhaust air and circulating air mode.

  1. Select the "Exhaust air/Circulating air" settings area.
  2. Set the operating mode with the rotary selector.

Press i button to revert to basic settings. Extraction/recirculation: Extraction. Language: English.

Press i button to revert to basic settings. Extraction/recirculation: Recirculation. Language: English.

  1. Press the i button to switch to the next settings area.

Brand logo display

The brand logo can be switched on or off.

  1. Select the "Display/brand logo" settings area.
  2. Using the rotary selector, adjust the display.

Confirmation of standard setting

Press the i button for approx. 3 seconds. The changes to the standard settings are accepted.

Switch on the fan and select the fan settings

It is recommended to switch on the blower when you start cooking and not to switch it off again until several minutes after you have finished cooking. In this way the kitchen fumes are removed most effectively.

Press the on-off button. The appliance automatically switches to fan setting 2.

13:03 Fan: Level 2. Timer: 00:00 min s. Level 0. Run-on: Light.

Select the required fan setting by pressing the corresponding Function button (1-3).

Switch off the fan

Press the on-off button.

Intensive setting (fan setting 4)

The Intensive setting generates maximum performance. It can be used if thick fumes or strong odours occur temporarily.

Press Function button 4.

If the Intensive setting is not switched off by hand, the fan automatically switches back to setting 2 after 10 minutes.

Fan run-on

Press the →l button.

12:45 Fan: Level 2. Timer: 00:00 min s. Light: Level 0. Run-on: 10 min.

The fan runs at the selected setting for the set time. Then the fan switches off automatically.

Light

The light can be switched on and off independently of the fan.

12:45 F:0: Level 2 Timer: 00:00 min s Level 7 Run-on: Light: ---

NOTE

  1. Press the ⚙ button. The "Light" area is selected automatically.
  2. Set the required luminosity with the rotary selector. The selected luminosity is indicated on the display.

Defective LED lamps may be replaced by the manufacturer, his customer service, or a similarly qualified person only.

Set timer

The timer runs independently of the extractor hood.

  1. Press the 🔒 button. The preset running time of the timer is displayed.

12:45 Fag: Level 2 Timer: 05:00 min s Stufe 0 Run-on: Light: ---

Intermittent

  1. The running time of the timer can be changed with the rotary selector.
  2. The time runs automatically.

The elapsing time is indicated on the display.

When the time has elapsed, a signal sounds. Press the button to end the signal early.

Intermittent ventilation can be used to ventilate the kitchen hourly for the preset time.

  1. Select a fan setting (except fan setting 4).

13:03 Fag: Level 2 Timer: 00:00 min s Light: Level 0 5 min Period

  1. Press the ⬆ button. The "Intermittent" area is selected automatically.

Intermittent ventilation starts automatically. The display switches back to idle state after the set time has elapsed.

The saturation of the grease filters can be queried via the Information button. To do this, the extractor hood must be switched on.

Press the i button.

SIEMENS LF21BB550 - Intermittent - 2

Information

Grease filter saturated: 60%

Saturation displays Grease filters

SIEMENS LF21BB550 - Saturation displays Grease filters - 1

Information

Grease filter saturated: 60%

Carbon filter saturated: 50%

NOTE

The saturation display of the grease filters can be reset even before 100 % is reached.

  1. Press the i button again. The settings area is lit.
  2. Using the rotary selector, set the saturation display to 0 %. If the i button is lit and a signal sounds when the extractor hood has been switched off, the grease filters are 100% saturated.
  3. Clean the grease filters or replace the activated carbon filter.

SIEMENS LF21BB550 - NOTE - 1

Press the i button for more information

Grease filter cleaned? yes

SIEMENS LF21BB550 - NOTE - 2

SIEMENS LF21BB550 - NOTE - 3

Carbon filter replaced? no

  1. Set the indicator to "yes".
  2. Acknowledge the input by pressing the i button.

LOOKING AFTER THE APPLIANCE

▷ Suitable cleaning agents and care products for your appliance can be purchased via the Hotline or from the Online Shop (see cover page).

Appliance surfaces

NOTE: Observe the warranty regulations in the enclosed service booklet.

The appliance surfaces and controls are scratch-sensitive. Therefore observe the following cleaning instructions:

  • Avoid cleaning the extractor hood with dry cloths, abrasive sponges, scouring agents, cleaning agents containing sand, soda, acid, chlorine or any other aggressive substances.
  • Clean the appliance surfaces and controls with a soft, damp cloth, washing-up liquid or a mild window cleaner only.
  • Do not scrape off dried dirt, but moisten with a damp cloth. – Clean carefully in the area of the controls to avoid liquid from getting into the electronics.

NOTE: Clean the stainless steel surfaces in the direction of the ground surface only! Do not use stainless steel cleaner for the control buttons!

Metal-mesh grease filters

The metal-mesh grease filters absorb the grease particles from the kitchen fumes. The filter mats consist of fire-proof metal.

RISK OF FIRE

As the filters become more saturated with greasy residue, the flammability increases. The function of the extractor hood may also be impaired.

The risk of fire is prevented by cleaning the metal-mesh grease filters in good time. When cleaning the grease filters, also remove grease deposits from the accessible parts of the housing with a damp cloth.

Cleaning the metal-mesh grease filters ...

Under normal operation (daily 1 to 2 hours), the metal-mesh grease filters must be cleaned 1x month.

... in the dishwasher

The metal-mesh grease filters can be cleaned in the dishwasher. Slight discolouration may occur but this will not affect the function of the grease filters. The filters must be placed loosely in the dishwasher. They must not be wedged in.

NOTE: Do not clean heavily saturated metal-mesh grease filters together with utensils.

... by hand

When cleaning by hand, soak the grease filters in a hot detergent solution, brush off the dirt, rinse thoroughly and leave to dry. Do not use any aggressive, acidic or alkaline cleaning agents. If dirt is particularly stubborn, we recommend using a special grease solvent spray. This can be ordered via the Online Shop.

Before removing and installing the grease filters, always follow the instructions and warnings in the chapter entitled "Safety instructions"!

Removing and installing the metal-mesh grease filters

  1. Open the lock and fold down the grease filters. In doing so, hold the underside of the grease filters with your other hand.

Illustration of hands interacting with a computer monitor displaying a grid screen (no text or symbols visible)

Illustration of hands interacting with a curved panel or screen (no text or symbols visible)

Illustration of hands using a laptop to interact with a device, showing a magnified view of the screen (no text or symbols present)

(for appliances with edge extraction)

  1. Clean the grease filters.
  2. Reinsert the cleaned grease filters.

Activated carbon filters bind odors in circulating-air mode.

Installing and removing the activated carbon filters

  1. Remove the grease filters (see Removing and installing the metal-mesh grease filters).

Illustration of a hand holding a rectangular object with arrows pointing to a grid-patterned surface (no text or symbols)

  1. Insert the activated carbon filter.
  2. Lock the catch.
  3. Reinsert the grease filters (see Removing and installing the metal-mesh grease filters).

Changing the activated carbon filter

Under normal operation (daily 1 to 2 hours), the activated carbon filters must be replaced approximately 2 times per year. The activated carbon filter is available from specialist outlets, customer service, or the Online Shop (see Optional accessories). Use original filters only. Activated carbon filters do not contain any pollutants. They can be disposed of in household refuse.

Prior to installation, always follow the instructions and warnings in the chapter entitled "Safety instructions"!

Exhaust-air mode

The exhaust air is conveyed upwards via a ventilation shaft or directly through the outer wall to the exterior.

NOTE: The exhaust air must not be conveyed into a functioning smoke or exhaust gas flue, or into a shaft which is used to ventilate installation rooms that contain heating appliances.

Before conveying the exhaust air into a non-functioning smoke or exhaust gas flue, obtain the consent of the appropriate heating engineer. Discharge exhaust air in accordance with official and statutory regulations (e.g., regional building laws). If the exhaust air is conveyed through the outer wall, a telescopic wall box should be used.

To ensure optimum performance, the extractor hood requires:

  • a short, straight exhaust air pipe and
  • the largest possible pipe diameter. ▷ If pipe bends cannot be avoided, ensure the largest possible radii.

NOTE: If long, rough exhaust air pipes, a lot of pipe bends or pipe diameters less than 150 mm are used, the air capacity will be less than optimum and there will be an increase in noise.

▷ Use only pipes or hoses made of non-combustible material for installation of the exhaust air duct. The manufacturer of the extractor hoods is not responsible for complaints which can be attributed to planning and design of the pipework.

Connecting pipes

The diameter of the exhaust air pipes should not be less than 150 mm.

▷ Round pipes:

We recommend an inner diameter of 150 mm, however at least 120 mm.

Flat ducts must have the same inner cross-section as round pipes.

There should be no sharp bends.

∅ 150 mm approx. 177 cm² ∅ 120 mm approx. 113 cm²

▷ If pipe diameters differ:

Use sealing strips.

▷ Attach exhaust air pipe directly to the air-pipe connector and seal appropriately. If using an aluminium pipe, smooth the connection area beforehand.

Stacked cylindrical metallic rings or helical structures, no text or symbols visible

SIEMENS LF21BB550 - Connection of 150 mm ∅ exhaust air pipe (recommended size) - 2

Connection of 120 mm ∅ exhaust air pipe

▷ Attach reducing connector directly to the air-pipe connector. ▷ Attach exhaust air pipe to the reducing connector. ▷ Seal both joints appropriately.

SIEMENS LF21BB550 - Connection of 120 mm ∅ exhaust air pipe - 1

SIEMENS LF21BB550 - Connection of 120 mm ∅ exhaust air pipe - 2

SIEMENS LF21BB550 - Connection of 120 mm ∅ exhaust air pipe - 3

ELECTRICAL CONNECTION

▷ Before connecting the appliance to the power supply, always follow the instructions and warnings in the chapter entitled "Safety instructions"! The extractor hood may only be connected by a qualified electrician who is familiar with the regulations of the relevant electricity supply company.

RISK OF INJURY

If the power cord of the extractor hood is damaged, it must be replaced by the manufacturer, his customer service or a similarly qualified person to prevent hazardous situations.

▷ The extractor hood may be connected to a correctly installed earthed socket only. ▷ Attach the earthed socket as directly as possible behind the flue duct.

– The earthed socket should be connected via its own circuit.

- If the earthed socket is no longer accessible following installation of the extractor hood, a disconnector must be fitted as for a permanent connection.

If a permanent connection is required

A disconnector must be provided on the installation side. Switches with a contact opening of more than 3 mm and all-pole disconnection are regarded as disconnectors. This includes LS switches, fuses and contactors.

Electrical specifications

The required connection data can be found on the rating plate inside the appliance when the grease filters have been removed.

Length of the power cord: approx. 1.30 m.

This extractor hood complies with the EC interference suppression regulations.

The extractor hood is designed for installation on the kitchen ceiling or on a rigid suspended ceiling.

During installation, optional accessories may also require fitting. Observe the minimum distance between hob and extractor hood (see "Safety instructions")! Avoid damaging the sensitive surfaces!

Preparing the ceiling

RISK OF INJURY, DAMAGE TO PROPERTY

Before drilling the holes for the designated installation location, check for concealed electrical cables and other lines.

The ceiling must be level and horizontal. The enclosed screws and wall plugs are suitable for concrete and natural stone. Use the appropriate fasteners for other ceiling structures.

Ensure that the ceiling has adequate load bearing capacity.

Ensure that the depth of the drilled holes corresponds with the length of the screws. Ensure that the wall plugs are secure.

Max. weight in kg: 50

Design subject to modification in line with technical development.

Installing the upper support frame

  1. Specify the total height of the support frame before installation and mark the screw holes. The height of the support frame can be adjusted in 20 mm steps. The total height is measured from the height of the ceiling, the height of the worktop and the corresponding distances between the hob and extractor hood.
  2. On the ceiling mark the centre point of the extractor hood.
  3. Using the enclosed template, mark the positions for the screws on the ceiling.

4xSIEMENS LF21BB550 - Installing the upper support frame - 1

Technical diagram of a metal frame structure with bolted joints and a threaded bolt (no text or labels)

4xSIEMENS LF21BB550 - Installing the upper support frame - 3

  1. Drill 4 holes of 8 mm diameter and insert wall plugs flush with the ceiling.
  2. Attach the upper part of the support frame to the ceiling using 4 screws.
  3. Ensure the support frame is correctly positioned. The middle bracket defines the preferred side and must face the hob control.

Installing the lower support frame

Attach the upper and lower parts of the support frame at the specified total height using 10 screws (preferred hole selection, see diagram).

Ensure the lower support frame is correctly positioned. The open side must face the hob control.

10x Exhaust-air mode 700-880 Circulating-air mode 700-1000

NOTE: The support frame can be aligned later by loosening the fastening screws on the ceiling.

Installing the extractor hood

  1. Hook the extractor hood from below into the support frame.

Do not trap the power cord!

  1. Attach the extractor hood to the support frame using 2 securing screws.

Technical diagram of a mechanical assembly with numbered components and directional arrows indicating motion or assembly steps.

  1. Hook in the retaining clip and tighten the screw.

Technical diagram of a mechanical assembly with a 4x magnified detail showing a bolt and two screws (no text or symbols present)

  1. Connect the pipes.
  2. Connect the power supply.

Installing the flue ducts

RISK OF INJURY

The insides of the flue ducts may have sharp edges. We recommend wearing protective gloves during installation.

  1. Separate the flue ducts. To do this, remove the adhesive tape.
  2. Remove the protective film from both flue ducts.
  3. Attach both parts of the upper flue to the extractor hood and push together.

NOTE: Protect the extractor hood from damage. Avoid scratching the sensitive surfaces.

3D diagram of a mechanical device with internal components and directional arrows indicating flow or movement (no text or symbols)

  1. Push up the upper flue part and secure with 2 screws.

Technical illustration of a mechanical press or press device with a cylindrical component and a separate screw (no text or symbols)

  1. Insert the two lower parts of the flue and push together.

3D diagram of a mechanical component with directional arrows indicating flow or movement (no text or symbols)

FIRE RISK

Illustration of hands holding a rectangular object with a black arrow indicating rotation (no text or symbols).

Illustration of hands using a tablet device to interact with a laptop, showing a magnified view of the screen (no text or symbols present).

Technical diagram of a mechanical device with numbered components and directional arrows indicating assembly or movement.

FIRE HAZARD

Illustration of hands holding a rectangular object with a black arrow indicating rotation.

Illustration of hands using a tablet to interact with a laptop, showing a magnified view of the screen.

Technical diagram of a mechanical device with numbered components and directional arrows indicating assembly or movement.

FIRE HAZARD

Press the on/off button.

Illustration of hands holding a rectangular object with a black arrow indicating rotation.

Illustration of hands using a computer to interact with a device, showing a magnified view of a device inside.

Technical diagram of a structural frame with bolts and a bolt, showing assembly details.

4xTechnical diagram of a mechanical assembly with numbered components and directional arrows indicating motion or assembly steps.

⚠️ FIRE HAZARD

Press the on/off key.

Technical diagram of a mechanical assembly with numbered components and directional arrows indicating motion or assembly steps.

FIRE HAZARD

Press the on/off key.

Intensive phase (Fan phase 4)

Illustration of hands holding a rectangular object with a black arrow pointing to it (no text or symbols present).

Illustration of hands using a laptop to interact with a device, showing a magnified inset of a device (no text or symbols present).

Technical diagram of a mechanical assembly with numbered components and directional arrows indicating motion or assembly steps.

SIEMENS LF21BB550 - Intensive phase (Fan phase 4) - 4LZ52650
SIEMENS LF21BB550 - Intensive phase (Fan phase 4) - 5LZ52850

Online shop: www.siemens-eshop.com

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Manual assistant
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Product information

Brand : SIEMENS

Model : LF21BB550

Category : Range hood