Bosch 7738335623

Bosch 100mm Bathroom Fan with Light Switch Activation

Model: 7738335623

Brand: Bosch Thermotechnik

1. Introduction and Product Overview

This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Bosch 100mm Bathroom Fan. This fan is designed to provide effective ventilation in bathrooms and toilets, combating humidity, unpleasant odors, and mold growth. It features activation via a light switch for simple and practical use.

Bosch 100mm Bathroom Fan installed in a modern bathroom

Image 1: The Bosch 100mm Bathroom Fan, a compact and elegant solution for improved indoor climate.

Key Features:

2. Safety Information

Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or serious injury.

3. Package Contents

Please check that all components are present and undamaged upon unpacking.

4. Setup and Installation

The Bosch 100mm Bathroom Fan is designed for wall-mounted installation only. It requires a 102mm diameter opening for a 100mm duct.

4.1 Pre-Installation Checks:

  1. Ensure the installation location is suitable for a wall-mounted fan and has access to appropriate electrical wiring.
  2. Verify that the wall opening is approximately 102mm in diameter to accommodate the 100mm duct.
  3. Confirm that the electrical supply is disconnected at the main circuit breaker before proceeding.

4.2 Installation Steps:

  1. Prepare the Opening: If not already present, create a circular opening of approximately 102mm in the wall at the desired installation height. Ensure there is sufficient depth for the fan body and ducting.
  2. Electrical Connection: A qualified electrician must connect the fan to the fixed electrical system. Use a NYM-O 2 x 1.5 mm² (H07V-K 2 x 1.5 mm²) or NYM-O 3 x 1.5 mm² (H07V-K 3 x 1.5 mm²) cable, with a maximum outer diameter of 7.5 mm. Ensure proper grounding if applicable. This model is activated by a light switch, so it should be wired to the same circuit as the bathroom light.
  3. Mounting the Fan: Insert the fan body into the prepared wall opening. Use the provided screws and wall plugs to securely fasten the fan to the wall. Ensure the fan is level.
  4. Attach Front Panel: Once the fan body is securely mounted and wired, attach the decorative front panel. It typically clips or screws into place.
  5. Final Check: Restore power at the main circuit breaker and test the fan by activating the light switch.
Diagram showing Bosch 100mm Bathroom Fan dimensions and wall mounting details

Image 2: Detailed dimensions and installation view of the Bosch 100mm Bathroom Fan, highlighting wall-mount only.

5. Operating Instructions

This Bosch bathroom fan is designed for straightforward operation.

5.1 Power On/Off:

The fan is activated directly by your bathroom's light switch. When the light switch is turned on, the fan will begin to operate. When the light switch is turned off, the fan will stop.

Close-up of Bosch 100mm Bathroom Fan with text indicating light switch activation and 100mm diameter

Image 3: The fan's activation method and 100mm diameter exhaust opening.

5.2 Airflow and Backdraft Damper:

The fan features an integrated backdraft damper. This mechanism ensures that once the fan extracts stale, humid air from the room, it prevents colder outside air or drafts from entering back into the room when the fan is not operating. The airflow rate is 95 m³/h, ensuring efficient air exchange.

Diagram illustrating airflow from a bathroom fan with an integrated backdraft damper

Image 4: Illustration of the fan's effective ventilation and backdraft prevention.

6. Maintenance

Regular maintenance ensures optimal performance and longevity of your fan.

6.1 Cleaning the Fan:

  1. Disconnect Power: Always ensure the electrical supply to the fan is disconnected at the main circuit breaker before cleaning.
  2. Remove Front Panel: Carefully unclip or unscrew the front decorative panel.
  3. Clean Surfaces: Use a soft, damp cloth to wipe down the front panel and the visible parts of the fan housing. For stubborn dirt, a mild, non-abrasive cleaning agent can be used.
  4. Clean Fan Blades: Gently clean the fan blades with a soft brush or a vacuum cleaner with a brush attachment to remove dust and debris. Avoid bending the blades.
  5. Reassemble: Once all parts are clean and dry, reattach the front panel.
  6. Restore Power: Reconnect the electrical supply at the main circuit breaker.

Do not use: Abrasive cleaners, solvents, or harsh chemicals, as these can damage the fan's plastic components.

7. Troubleshooting

If you encounter issues with your Bosch bathroom fan, refer to the following common problems and solutions.

ProblemPossible CauseSolution
Fan does not turn onNo power supply
Faulty light switch
Loose wiring
Check circuit breaker. Ensure light switch is on. Verify electrical connections (by a qualified electrician).
Fan is excessively noisyAccumulated dust/debris on blades
Loose mounting
Acoustic resonance in tiled rooms
Clean fan blades (see Maintenance). Ensure fan is securely mounted. Note that 39 dB(A) is the specified noise level, and tiled rooms can amplify sound.
Poor air extractionBlocked ducting
Fan blades obstructed
Backdraft damper stuck
Check ducting for obstructions. Clean fan blades. Inspect backdraft damper for free movement (ensure power is off).
Fan vibratesUnbalanced fan blades
Loose mounting
Clean fan blades to remove uneven debris. Tighten mounting screws.

If the problem persists after attempting these solutions, please contact a qualified electrician or Bosch customer support.

8. Specifications

Technical data for the Bosch 100mm Bathroom Fan (Model 7738335623).

FeatureSpecification
BrandBosch Thermotechnik
Model Number7738335623
ColorWhite
Product Dimensions (L x W x H)16 x 18 x 16 cm (6.3 x 7.1 x 6.3 inches)
Power13.5 Watts
Voltage230.0 V
MaterialPlastic
Number of Speeds1
Noise Level39 Decibels (at 3m)
Item Weight500 g (1.1 lbs)
Fan DesignExtraction Fan
Power SourceCorded Electric
StyleLight Switch Activation
Recommended UseIndoor (Bathroom)
Mounting TypeWall Mount
Airflow Rate95 m³/h

9. Warranty Information

Bosch products are manufactured to high-quality standards and come with a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official Bosch Thermotechnik website for detailed warranty terms and conditions applicable in your region. Keep your proof of purchase for warranty claims.

10. Support and Contact

For technical assistance, spare parts, or further inquiries, please contact Bosch customer support. You can find contact details on the official Bosch Thermotechnik website or through your local retailer.

Online Resources: Visit the Bosch Thermotechnik Store on Amazon

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