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Need help?Do you have a question about the Hoval UltraGas (15-1000) and is the answer not in the manual?
Contact details for installers and service providers.
Explanation of symbols used in the manual.
Crucial safety measures to prevent hazards during operation and maintenance.
Defines the approved purpose and fuel types for the boiler.
Details on how to contact Hoval for support and troubleshooting.
Overview of the main components of the heating system and their functions.
Essential checks to perform before initial system operation.
Step-by-step instructions for powering on the heating system.
Explains the role and capabilities of the TopTronic® T heating controller.
Tips and methods to optimize energy consumption for the heating system.
Describes the default information shown on the control unit's display.
Troubleshooting steps for when the gas boiler fails to start.
Solutions for issues causing radiators to not heat up properly.
Steps to resolve problems related to the absence of hot water.
Procedure for filling and topping up the heating system with water.
General