Neff Gas Hob Installation Guide
This document provides comprehensive installation instructions for Neff gas hobs. Please read this manual carefully before proceeding.
General Safety Instructions
WARNING – Risk of explosion! Escaping gas may cause an explosion.
All installation, connection, regulating, and conversion work to a different gas type must be carried out by an authorized professional, adhering to applicable regulations, legal requirements, and local supplier regulations. Pay special attention to ventilation provisions.
WARNING – Danger: Magnetism!
Caution: Magnetic field. Persons with pacemakers should maintain a minimum distance of 10 cm from control elements and their bases, as permanent magnets are integrated within them. Never carry control elements on your body.
Ensure adequate kitchen ventilation, especially when operating the gas hob. Do not connect the appliance to an exhaust gas system for combustion products. Never install the appliance in boats or vehicles. The warranty is valid only when the appliance is used as intended.
Before installation, verify that local supplier conditions are compatible with the appliance settings specified on the rating plate (gas type and pressure, power, voltage). Secure the power cord to the cabinet to prevent contact with hot parts. Disconnect power and gas supply before any work. Connect appliances with power supply to earth. Do not make internal changes; contact technical customer service if needed.
Before Installing
This appliance is a Class 3 appliance according to EN 30-1-1 for gas appliances: Built-in appliance. The unit must be stable and securely fastened. Nearby furniture, laminated panels, and adhesives must be made of non-flammable, heat-resistant materials. Do not install above refrigerators, washing machines, dishwashers, or similar appliances. Installation is permitted only on an oven with forced ventilation; check oven dimensions in its installation manual. If installing an oven underneath, work surface thickness may differ; refer to the oven's installation instructions. For exhaust air fans or extractor hoods, follow their installation instructions and observe minimum vertical distances to the hob.
Preparing the Units
Make the required cut-out in the worktop. For 500 mm recesses, install the appliance near the front edge. Any panel closer than the specified clearance must be non-combustible, maintaining at least 5 mm distance from the appliance. Maximum panel dimensions: 30 mm thickness x 70 mm height. Seal cut surfaces of wooden worktops with special glue to protect from moisture.
Preparing the Built-in Unit for Standard Installation
Use worktops between 20 mm and 50 mm thick. For worktops between 12 mm and 20 mm thick, use a spacer available from technical customer service.
Installation on a Drawer or Cupboard
WARNING – Risk of burns! Accessible parts can become hot during operation.
If no built-in oven is underneath and the underside is accessible:
For gas hobs with a wok burner, insert a non-flammable intermediate floor (e.g., metal or plywood) at a 10 mm distance from the hob. For gas hobs without a wok burner, an intermediate floor is recommended. In both cases, the distance from the intermediate floor to the appliance's mains connection must be at least 10 mm. The separator thickness must allow for the distances shown in the figure.
Installation Above an Oven
Position the hob with the upper side facing down on a flat, stable surface. Apply the supplied adhesive seal to the hob's lower edge to prevent liquid penetration. Screw in the supplied brackets so they can turn freely. Turn the hob over and insert it into the recess, aligning it with the front edge. Turn and tighten the brackets. Bracket position depends on worktop thickness. Do not use silicone to bond the appliance to the worktop.
Removing the Appliance
Disconnect from electricity and gas connections. Unscrew brackets and proceed in reverse order.
Connecting the Gas
Observe country-specific guidelines.
CAUTION – Risk of explosion! Ensure all connections are leak-tested after work. Arrange the gas connection so the shut-off valve is accessible. Verify gas type and pressure information on the rating plate matches local conditions. Connect to a rigid gas pipe or flexible metal pipe. Ensure the flexible metal pipe does not contact moving furniture parts or obstructed spaces. Gas connection on the appliance is G 1/2.
Connection to gas cylinder or liquid gas tank
If the flame is large or unstable, check the regulator. An overpressure safety device can be installed to limit or cut off gas supply if the regulator fails.
Spare parts for gas connection
Gas connection parts are available from technical customer service if country regulations permit.
Gas connection R 1/2
Fit the seal and the R 1/2 connecting piece to the appliance's gas connection.
Gas connection G 1/2
Insert the seal between the appliance's gas connection and the gas supply.
Electrical Connection
This appliance is Type Y; the connection cable must only be replaced by technical customer service. Observe cable type and minimum cross-section. Hobs are supplied with a power cord (with or without plug). The power cable must only be replaced with an original cable from after-sales service. Do not use extension cables or multiple socket strips. Connect plug-equipped appliances only to correctly installed sockets with a protective earth conductor. Connect to a fixed installation and set up appropriate isolating switches according to installation regulations. Wire colours: BN (Brown), BU (Blue), GN/YE (Green and Yellow).
Converting the Gas Type
If country regulations allow, the appliance can be adapted to other gas types listed on the rating plate. Suitable parts are supplied with the appliance or can be obtained from customer service. Refer to the table for the correct combination for each burner and gas type.
Burner Types: C Economy burner, D Standard-output burner, E High-output burner, H Dual-wok multi-crown burner (1 - Outer flame, 2 - Inner flame).
Adjusting the Taps
Set control elements to minimum power and pull them out. Remove the control element plinth. To access the bypass screw, push the flexible rubber holder with a screwdriver tip. Never remove the sealing ring. Adjust bypass screws (M) according to the table: A: Tighten bypass screws firmly. B: Bypass screws must be flush with the fitting.
Replacing the Nozzles
Remove pan supports, burner caps, and distributors. Replace nozzles with the appropriate wrench and tighten carefully to ensure a seal. Ensure the nozzle does not detach during removal or fastening.
Reinstalling the Appliance
Reinstall components in reverse order.
Checking Functionality
Verify that turning the knob between maximum and minimum power does not extinguish the burner or cause backfire. If gas flow is incorrect, check the table for the correct nozzle and bypass screw position.
Documenting the Gas Type Conversion
Attach the sticker showing the new gas type near the rating plate.
Technical Specifications Table
| ID | Gas | Nz | Qn (kW) | m³/h | g/h | M |
|---|---|---|---|---|---|---|
| C | G20/20 mbar | 73 | 1.00 | 0.095 | - | B |
| C | G20/25 mbar | 70 | 1.00 | 0.095 | - | B |
| C | G25/20 mbar | 75 | 1.00 | 0.111 | - | B |
| C | G25.1/25 mbar | 77 | 0.90 | 0.1 | - | B |
| C | G25.3/25 mbar | 77 | 1.00 | 0.108 | - | B |
| C | G30/29 mbar | 50 | 1.00 | - | 73 | A |
| C | G30/37 mbar | 45 | 1.00 | - | 73 | A |
| C | G30/50 mbar | 44 | 1.00 | - | 73 | A |
| C | G31/37 mbar | 50 | 1.00 | - | 71 | A |
| D | G20/20 mbar | 97 | 1.75 | 0.167 | - | B |
| D | G20/25 mbar | 91 | 1.75 | 0.167 | - | B |
| D | G25/20 mbar | 100 | 1.75 | 0.194 | - | B |
| D | G25.1/25 mbar | 95 | 1.60 | 0.177 | - | B |
| D | G25.3/25 mbar | 95 | 1.75 | 0.19 | - | B |
| D | G30/29 mbar | 66 | 1.75 | - | 127 | A |
| D | G30/37 mbar | 61 | 1.75 | - | 127 | A |
| D | G30/50 mbar | 58 | 1.75 | - | 127 | A |
| D | G31/37 mbar | 66 | 1.75 | - | 125 | A |
| E | G20/20 mbar | 128 | 3.00 | 0.286 | - | B |
| E | G20/25 mbar | 120 | 3.00 | 0.286 | - | B |
| E | G25/20 mbar | 134 | 3.00 | 0.333 | - | B |
| E | G25.1/25 mbar | 126 | 2.80 | 0.31 | - | B |
| E | G25.3/25 mbar | 126 | 3.00 | 0.325 | - | B |
| E | G30/29 mbar | 87 | 3.00 | - | 218 | A |
| E | G30/37 mbar | 80 | 3.00 | - | 218 | A |
| E | G30/50 mbar | 75 | 3.00 | - | 218 | A |
| E | G31/37 mbar | 87 | 3.00 | - | 214 | A |
| H | G20/20 mbar | 1-145 / 2-68 | 5.00 | 0.476 | - | B |
| H | G20/25 mbar | 1-136 / 2-70 | 5.00 | 0.476 | - | B |
| H | G25/20 mbar | 1-145 / 2-72 | 4.60 | 0.510 | - | B |
| H | G25.1/25 mbar | 1-137 / 2-75 | 4.40 | 0.487 | - | B |
| H | G25.3/25 mbar | 1-137 / 2-75 | 4.60 | 0.500 | - | B |
| H | G30/29 mbar | 1-100 / 2-45 | 4.60 | - | 334 | A |
| H | G30/37 mbar | 1-93 / 2-42 | 4.60 | - | 334 | A |
| H | G30/50 mbar | 1-83 / 2-42 | 4.60 | - | 334 | A |
| H | G31/37 mbar | 1-100 / 2-45 | 4.60 | - | 328 | A |
Diagram Descriptions
Figure 1: Diagram showing minimum vertical clearance required between the hob and a range hood or extractor fan.
Figure 2: Diagram illustrating the required cut-out dimensions for the hob in a worktop, including edge clearances.
Figure 3: Diagram showing the installation of a gas hob with a wok burner, indicating the placement of a non-flammable intermediate floor at a 10 mm distance from the hob.
Figure 4: Diagram showing the installation of a gas hob without a wok burner, recommending an intermediate floor underneath the hob.
Figure 5: Diagram illustrating the correct positioning of the hob above an oven.
Figure 6: Diagram showing the application of the adhesive seal to the hob's lower edge.
Figure 7: Diagram demonstrating how to screw in the mounting brackets so they can turn freely.
Figure 8: Diagram showing the hob being placed into the worktop recess, aligned with the front edge.
Figure 9: Diagram illustrating the process of turning and tightening the mounting brackets, noting their position depends on worktop thickness.
Figure 10: An image displaying various spare parts for gas connections.
Figure 11: Diagram showing the R 1/2 gas connection procedure.
Figure 12: Diagram illustrating the G 1/2 gas connection procedure.
Figure 13: Diagram showing the standard electrical wiring colours: BN (Brown), BU (Blue), GN/YE (Green and Yellow).
Figure 14: Diagram showing how to access the bypass screw by pushing the flexible rubber holder with a screwdriver tip.
Figure 15: Diagram illustrating the correct adjustment of bypass screws (M), showing them tightened firmly and flush with the fitting.
Figure 16 & 17: Diagrams showing the process of replacing gas nozzles, including removing burner components and tightening the new nozzles.
