Bosch Extractor Hood: Operating and Installation Instructions

Appliance Description

This section details the components of the extractor hood:

• Chimney panelling: The decorative cover for the vent pipe.
• Filter grille: The removable metal mesh that captures grease.
• Lighting: Integrated lights for illuminating the cooking surface.
• Light / fan switches: Controls for the lighting and fan speed.

Operating Modes

The extractor hood can operate in two modes:

Exhaust-air mode:

The extractor fan draws kitchen vapours through the grease filter and expels them into the atmosphere. The grease filter traps solid particles, keeping the kitchen free of grease and odours. Special care is required when operating simultaneously with other combustion appliances (e.g., gas heaters) that share a chimney, to ensure adequate fresh air supply to prevent the risk of combustion gas poisoning.

Circulating-air mode:

This mode requires an activated carbon filter to neutralize odours. Vapours are purified by the grease and activated carbon filters and recirculated back into the kitchen. Replacement filters are available from specialist outlets.

Before Using for the First Time

Important Notes:

• Instructions may apply to multiple appliance versions; features may vary.
• The hood complies with relevant safety regulations.
• Repairs must be performed by qualified technicians to avoid risk.
• Read these instructions carefully for personal safety and appliance care.
• Retain instructions for future owners.
• The appliance is labelled according to the WEEE directive (2002/96/EG) for recycling.

If You Encounter a Problem

For questions or faults, contact Customer Service. Quote the E-Nr. (product number) and FD (production date) found on the appliance's nameplate.

The manufacturer is not liable for issues arising from pipework design or layout.

Safety Instructions

General Safety:

• Do not use a damaged appliance. Connection must be by a qualified technician.
• The appliance is not intended for unsupervised use by children or infirm persons. Supervise children to prevent them from playing with the appliance.
• If the connecting cable is damaged, it must be replaced by the manufacturer or a qualified service person.
• Dispose of packaging materials properly.
• This extractor hood is for domestic use only.
• Ensure light bulbs are fitted when the hood is in use; replace defective bulbs promptly.
• Never operate the hood without a grease filter.
• Be cautious when cooking with fat or oil; never leave the cooker unattended as overheating can cause fires.
• Do not flambé food directly under the hood; this poses a risk of the grease filter catching fire.
• Hotplates must always be covered with a utensil.
• Restrictions apply to use over solid-fuel burners (coal, wood, etc.).

Operation by Children and Unsupervised Adults:

• Never allow children to play with the appliance.
• Do not let adults or children operate the appliance unsupervised if they lack the mental, physical, knowledge, or experience to do so safely and correctly.

Gas Hobs / Gas Cookers:

• Avoid using all gas hotplates simultaneously for prolonged periods (max. 15 minutes) at maximum thermal load to prevent burns or damage.
• If operating over a gas hob, use the hood at maximum setting if three or more gas hotplates are in use simultaneously.

Operating Procedure

For effective vapour removal:

• Switch the ventilator ON as soon as cooking begins.
• Switch the ventilator OFF a few minutes after cooking finishes.

Lighting: The light can be switched on or off independently of the fan.

Controls typically include a light switch (Off/On) and ventilator speed settings (0, 1, 2, 3).

Filters and Maintenance

Grease Filters:

Metal filters trap grease particles. They are made from non-combustible metal. As filters saturate with grease, the risk of fire increases, and hood efficiency decreases. Regular cleaning reduces fire risk from heat build-up.

Cleaning:

• Clean metal grease filters monthly for normal daily use (1-2 hours).
• Filters can be cleaned in a dishwasher, though slight discolouration may occur. Ensure filters are placed loosely, not wedged.
• Do not wash grease-saturated filters with other dishes.
• For hand cleaning, soak filters in hot soapy water, brush clean, rinse thoroughly, and drain. Avoid aggressive cleaners.

Activated Carbon Filter:

Used for neutralizing odours in recirculating mode. Filters become saturated with grease, increasing fire risk and reducing effectiveness. Replace the activated carbon filter annually for normal use (1-2 hours daily). Use only original filters for optimal performance. Old filters can be disposed of as household refuse.

Diagram shows removing metal filters by pressing a catch and folding them down. It also shows inserting activated carbon filters into the fan motor area and rotating them to lock.

Cleaning and Care

Always isolate the hood from the power supply before cleaning.

General Cleaning:

• Do not use abrasive sponges or cleaning agents containing sand, soda, acid, or chlorine.
• Clean the hood with hot soapy water or mild window cleaner.
• Wipe off dried-on dirt with a damp cloth.
• Remove grease deposits from accessible parts of the housing during filter cleaning to prevent fire risk and maintain efficiency.
• Clean switches with a soft, damp cloth and mild detergent solution only. Do not use stainless steel polish on switches.

Stainless Steel Surfaces: Use a mild, non-abrasive stainless steel cleaner, cleaning in the direction of the grind/polish. A specific cleaner (no. 461731) is recommended.

Aluminium, Coated, and Plastic Surfaces: Do not use dry cloths. Use mild window cleaning agent. Avoid aggressive, acidic, or caustic cleaners.

Replacing Light Bulbs:

1. Isolate power.
2. Remove grease filters.
3. Press down the bulb cover and disconnect from the light strip.
4. Replace bulb with a standard filament bulb (max 40 W, E14 holder).
5. Reattach the lamp cover.
6. Re-insert grease filters.
7. Restore power.

Observe warranty regulations in the enclosed service booklet.

Installation Instructions

This extractor hood is designed for wall mounting.

Important Information:

• Old appliances can be recycled. Render old appliances unusable before disposal.
• Packaging materials are environmentally friendly and recyclable.
• The hood can be used in exhaust-air or circulating-air mode.
• Mount the hood centrally over the hob.
• Minimum Distances:
• Electric hob: 550 mm
• Gas hob: 650 mm
• Do not install over solid fuel cookers unless they have a closed, non-removable cover and national regulations are met, due to fire hazard (flying sparks).
• Smaller gaps increase the likelihood of condensation droplets forming on the underside of the hood.

Gas Cooker Specifics:

• Comply with national statutory regulations for gas installations (e.g., Germany: TRGI).
• Comply with current regulations and instructions from the gas appliance manufacturer.
• If installing next to a high-sided unit or wall, ensure a gap of at least 50 mm.

Preparing the Wall:

• The wall must be flat and perpendicular.
• Ensure the wall can bear the applied loads.
• Provided screws/plugs are for solid masonry; use appropriate fasteners for other wall types (plasterboard, etc.).
• Ensure the wall provides a firm hold for mounting hardware.

Weight:

Rights to construction changes reserved.

Exhaust-air Mode Details:

Exhaust air is discharged through a ventilation shaft or directly outside. It should not be directed into flues used for other purposes or shafts ventilating rooms with fireplaces. Discharge must comply with official regulations. When used with other combustion appliances sharing a chimney, ensure adequate fresh air supply to prevent underpressure (< 4 Pa) and risk of combustion gas poisoning. Unrestricted operation is possible with a recirculating mode and activated carbon filter. A telescopic wall box is recommended for external discharge.

Diagram shows airflow in exhaust-air mode and dimensions for the hood and ducting, including minimum distances of 550mm for electric and 650mm for gas hobs.

Pipework Requirements:

• For exhaust-air mode, a one-way flap should be fitted inside the hood if not already present in the ductwork.
• Use short, smooth exhaust pipes with minimal bends. Larger pipe diameters are preferred to maintain extraction rate and reduce noise.
• Flat ducts must have an internal cross-section equivalent to round pipes. Avoid sharp bends.
• Air Connector Sizes:
• ⌀ 150 mm: Mount pipe directly to hood outlet. Use reducing connector for exhaust-air duct.
• ⌀ 120 mm: Mount pipe directly to hood outlet. Use reducing connector for exhaust-air duct.

Diagrams illustrate one-way flap installation and air connector adapters for 150mm and 120mm pipes.

Electrical Connection:

WARNING: APPLIANCE MUST BE EARTHED.

Fitting a Plug: Connect wires according to colour code: Green/Yellow to Earth (E/⏚), Blue to Neutral (N), Brown to Live (L).

Connect to an earthed socket installed per regulations, preferably behind the chimney panelling, on its own circuit. If the socket becomes inaccessible, ensure a permanently installed disconnector is present.

Direct wiring into the mains must be done by a qualified electrician, including a suitable separator (circuit breaker/contactor) with a contact gap of over 3 mm.

If the connecting cable is damaged, it must be replaced by the manufacturer or a qualified person.

Electrical Data: Found on the appliance nameplate.

Safety: Always disconnect from the electricity supply before repairs.

The hood has a connecting cable length of 1.30 m and complies with EC regulations for RF interference suppression.

Installation Steps (Wall Mounting):

1. Remove grease filter.
2. Mark a vertical line on the wall for hood centreline.
3. Use template to mark screw positions. Ensure correct minimum distances (550 mm electric, 650 mm gas).
4. Drill holes (5 x 8 mm for hood, 4 x 8 mm for flue brackets) and insert wall plugs.
5. Screw on the 2 brackets for flue ducts.
6. Screw in the middle screw (approx. 5 mm protrusion) to aid hanging.
7. Hook the hood onto the middle screw.
8. Insert the remaining 4 screws with washers, aligning the hood before tightening.
9. Connect the air outlet pipe.
10. Connect the hood to the electricity supply.
11. Stainless Steel Model: Remove protective film from flue ducts. Be cautious of sharp edges inside flue panelling; wear gloves.
12. Screw the upper flue duct to the fixing bracket.
13. Position the lower flue duct, screw it to the hood from below, and then to the fixing bracket. Protect surfaces during assembly.
14. Re-insert the grease filter.

Diagrams illustrate drilling, bracket mounting, hanging the hood on a screw, connecting flue ducts, and re-inserting filters.

Model Information

Model numbers mentioned:

• DHZ 5145
• 353121