Zanussi ZGNN645K - User Manual

Questions and Answers

J
johnsonbenjaminAug 11, 2025
What to do if there is no spark when trying to activate the spark generator on my Zanussi Hob?
- K
  Kylie SmithAug 11, 2025
  If there is no spark when you try to activate the spark generator, consider the following: * Check if the Zanussi Hob is correctly connected to the electrical supply. * Make sure that the fuse is the cause of the malfunction. If the fuse is blown again, contact a qualified electrician. * Place the burner cap and crown correctly.
E
Erika VillanuevaAug 20, 2025
Why does the flame extinguish immediately after ignition on my Zanussi ZGNN645K?
- D
  Deanna RosarioAug 20, 2025
  If the flame extinguishes immediately after ignition on your Zanussi Hob, it could be that the thermocouple is not heated up sufficiently. After lighting the flame, keep the knob pushed for equal or less than 10 seconds.
B
brandi17Aug 30, 2025
How to fix an uneven flame ring on my Zanussi ZGNN645K Hob?
- E
  Erica LiuAug 31, 2025
  If the flame ring is uneven on your Zanussi Hob, make sure that the injector is not blocked and the burner crown is clean from food residues.

This document is a user manual for the Zanussi ZGNN645K and ZGNN645X gas hobs. It provides comprehensive information on safety, installation, operation, maintenance, and technical specifications.

Function Description:

The Zanussi ZGNN645K and ZGNN645X are built-in gas hobs designed for domestic cooking. They feature four gas burners, including a Multi Crown burner, Semi-rapid burners, and an Auxiliary burner, each with individual control knobs. The hob is equipped with an ignition system for easy lighting of the burners and thermocouples for safety, which interrupt the gas supply if the flame goes out. The progressive valves allow for precise flame regulation.

Important Technical Specifications:

Model Identification: ZGNN645K, ZGNN645X
Type of hob: Built-in hob
Number of gas burners: 4
Hob Dimensions:
- Width: 594 mm
- Depth: 510 mm
Gas Connection: R 1/2"
Appliance Category: II2H3+
Appliance Class: 3
Electrical Supply: 220-240 V ~ 50-60 Hz, 3 core flexible cable with non-rewireable plug fitted with a 3 amp cartridge fuse.
Total Power:
- Gas original (G20 (2H) 20 mbar): 9 kW
- Gas replacement (G30 (3+) 28-30 mbar): 629 g/h
- Gas replacement (G31 (3+) 37 mbar): 618 g/h
Burner Specifications (Natural Gas G20 20 mbar):
- Multi Crown: Normal Power 4.0 kW, Minimum Power 1.4 kW, Injector Mark 146
- Semi-rapid: Normal Power 2.0 kW, Minimum Power 0.45 kW, Injector Mark 96
- Auxiliary: Normal Power 1.0 kW, Minimum Power 0.33 kW, Injector Mark 70
Burner Specifications (LPG G30/G31 28-30/37 mbar):
- Multi Crown: Normal Power 3.65 kW, Minimum Power 1.4 kW, Injector Mark 095, Nominal Gas Flow G30 265 g/h, G31 261 g/h
- Semi-rapid: Normal Power 2.0 kW, Minimum Power 0.45 kW, Injector Mark 71, Nominal Gas Flow G30 145 g/h, G31 143 g/h
- Auxiliary: Normal Power 1.0 kW, Minimum Power 0.33 kW, Injector Mark 50, Nominal Gas Flow G30 73 g/h, G31 71 g/h
Bypass Diameters: Multi Crown 57 (1/100 mm), Semi-rapid 32 (1/100 mm), Auxiliary 28 (1/100 mm)
Energy Efficiency (EE gas burner):
- Left rear - Semi-rapid: 54.5%
- Right rear - Semi-rapid: 58.1%
- Left front - Multi crown: 59.7%
- Right front - Auxiliary: not applicable
Energy Efficiency for the gas hob (EE gas hob): 57.4%

Usage Features:

Ignition: To light a burner, push the control knob down and turn it counterclockwise to the maximum gas supply position. Keep the knob pushed for 10 seconds to allow the thermocouple to warm up and prevent gas supply interruption. Adjust the flame after it is regular.
Flame Regulation: The hob is supplied with progressive valves for precise flame adjustment.
Minimum Level Adjustment: The minimum flame level can be adjusted by a bypass screw located under the control knob and gasket.
Cookware Compatibility: Recommended cookware diameters are 180-260 mm for Multi Crown, 120-220 mm for Semi-rapid, and 80-180 mm for Auxiliary burners. Cookware should be stable, centrally positioned on the burner, and not overlap the edges of the appliance.
Safety: Thermocouples ensure gas cut-off if the flame extinguishes. A child safety device can be activated if available. The appliance should not be left unattended during operation.
Energy Saving: Users are advised to ensure burners and pan supports are correctly assembled, use appropriate cookware diameters, center pots, use only necessary water, put lids on cookware, turn down the flame to simmer, and use a pressure cooker where possible.

Maintenance Features:

General Cleaning: Clean the hob after each use. Use a moist soft cloth and neutral detergents. Avoid abrasive products, solvents, metal objects, water spray, and steam cleaners.
Stainless Steel Parts: Wash with water and dry with a soft cloth. For stubborn stains, soak with mild detergent. Use specific cleaning products for stainless steel.
Enamelled Parts, Caps, and Crowns: Wash with warm soapy water and dry carefully.
Pan Supports: Must be washed by hand, not in a dishwasher. Ensure they are correctly positioned and aligned with the burner center after cleaning to prevent damage to the hob top.
Spark Plug: Keep the ceramic ignition candle and metal electrode clean to prevent difficult lighting. Check that burner crown holes are not obstructed.
Periodic Maintenance: Contact an Authorised Service Centre periodically to check the gas supply pipe and pressure adjuster.
Injector Replacement: Injectors can be replaced to adapt the hob to different gas types. This involves removing pan supports, burner caps and crowns, and then replacing injectors with the correct ones. A new gas type label must be attached near the gas supply pipe.
Electrical Cable Replacement: Must be carried out by a qualified service force center or personnel with similar competencies.
Troubleshooting: The manual provides a guide for common issues like no spark, flame extinguishing, or uneven flame, along with possible causes and remedies. If issues persist, contact an Authorised Service Centre.