This document is a user manual for a Bosch Built-in Gas Hob, models PRS9A6D70 and PRS9A6L70. It provides comprehensive information on the appliance's function, safety, operation, maintenance, and troubleshooting.
Function Description
The Bosch Built-in Gas Hob is designed for domestic cooking purposes. It features multiple gas burners with varying power outputs, allowing for diverse cooking needs. The hob includes a dual-wok multi-crown burner, which offers independent regulation of inner and outer flames for precise heat control. The appliance incorporates an automatic ignition system for convenient startup and a safety system (thermocouple) that interrupts gas flow if a burner accidentally goes out, enhancing user safety. A residual heat indicator is also present for each burner, warning users when parts of the hob are still hot after use.
Important Technical Specifications
The hob is equipped with several types of burners, each with specific power outputs:
- Economy burner: 1.10 kW
- Standard-output burner: 1.90 kW
- High-output burner: 2.80 kW
- Dual-wok multi-crown burner: 5.80 / 6.10 kW
The control knobs allow for incremental flame height adjustment from power level 1 (lowest setting) to 9 (highest setting), with an additional setting for electric ignition. The dual-wok burner's control knob enables independent regulation of its inner and outer flames. The appliance is intended for use up to an altitude of max. 2000 m above sea level.
Usage Features
The hob offers several features to enhance the cooking experience:
- Control Knobs: These are used to configure all functions and set flame heights. For the dual-wok burner, the control knob allows separate adjustment of inner and outer flames.
- Automatic Ignition: To ignite a burner, the user presses and turns the control knob anti-clockwise to the highest level, holding it for a few seconds until the flame ignites and the 'd' symbol appears on the display.
- Manual Ignition: In case of a power cut, burners can be lit manually using a lighter or match.
- Safety System: This system automatically cuts off the gas supply if a burner flame is accidentally extinguished, preventing gas leaks. To activate it, the control knob must be held down for four seconds after ignition.
- Residual Heat Indicator: The hob features a two-stage indicator (H for very hot, h for hot) for each burner, advising users not to touch hot surfaces.
- Cookware Guidelines: The manual provides specific recommendations for cookware diameter for each burner type to ensure optimal performance and energy efficiency. For instance, the multi-crown burner requires cookware with a base diameter between 22 cm and 30 cm, while the economy burner uses cookware between 12 cm and 16 cm. Cookware with a rounded base is recommended for the multi-crown burner, especially when using the additional wok grid.
- Accessories: Optional accessories include an additional wok grid (for rounded-base cookware on the multi-crown burner, extending service life) and an espresso maker grid (for small-diameter cookware on the lowest power setting burner). A simmer plate is also available for low-heat cooking on economy or standard-output burners.
- Energy Saving Tips: Users are advised to choose burners that match pan size, cover saucepans with lids, lift lids infrequently, use glass lids, cook with minimal water, and turn down power levels early to conserve energy.
Maintenance Features
Proper cleaning and servicing are crucial for the appliance's longevity and efficient operation:
- Cleaning Burners: After each use, burner parts should be cleaned with a non-metallic brush and soapy water, then dried completely. It is explicitly stated not to clean burner parts in a dishwasher, as this can cause damage. Ignition plugs should be cleaned regularly with a small, non-metallic brush, taking care to avoid heavy knocks. Burner holes and grooves must be kept clean for a correct flame.
- Cleaning Pan Supports: Pan supports can be cleaned with a non-metallic brush and soapy water. They can also be cleaned in a dishwasher using recommended cleaning agents, with pre-cleaning advised for heavy soiling. Care must be taken with rubber pads to prevent scratching the hob.
- General Appliance Cleaning: The appliance should be cleaned using a sponge and soapy water after it has cooled down, then dried with a soft cloth. Spilled liquids should be removed immediately to prevent food from sticking.
- Cleaning Product Restrictions: Users are warned against using harsh, abrasive detergents, steel wool, knives, or sharp objects for cleaning, as these can damage surfaces. Steam-cleaning appliances are also prohibited.
- Control Knob Maintenance: Control knobs should not be removed during cleaning to prevent humidity damage to the appliance's interior. If a control knob becomes too stiff or loose, it must be repaired or replaced by after-sales service.
The manual also covers troubleshooting common issues, such as impaired electrical operation, non-working automatic ignition, uneven burner flames, gas supply problems, and electronic faults, providing guidance on how to address them or when to contact customer service.
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