About the Vitodens 100-W
The Viessmann Vitodens 100-W (Models 26 to 125) is a wall-mounted, gas-fired condensing boiler designed for domestic hot water and heating. This manual provides essential information for safe and effective operation.
Key features include:
- Efficient gas-fired condensing technology
- Wall-mounted design
- Combi boiler for domestic hot water
- Heating input ranging from 6.2 to 36.6 kW
Safety First
WARNING: Improper installation, adjustment, or operation can lead to severe personal injury or loss of life, including carbon monoxide poisoning. Always follow the instructions in this manual and ensure installation and service are performed by a qualified professional.
Key safety points:
- Always smell for gas before operating.
- Never attempt to light the burner by hand.
- Ensure adequate ventilation and avoid contaminated air.
- In case of fire, evacuate and call the fire department immediately.
- Never use the appliance if any part has been under water.
For detailed safety information, please refer to the relevant sections within this document.
Getting Started
Before operating the boiler, ensure you understand its functions. Your heating contractor should perform the initial start-up and explain the system.
Key steps for starting the system:
- Check the system pressure.
- Ensure vents in the boiler room are open and unobstructed.
- Open the gas shut-off valve.
- Turn on the ON/OFF switch.
The system is now ready for operation. For detailed operating modes and settings, consult the relevant sections.
Troubleshooting and Maintenance
This manual includes a comprehensive troubleshooting guide to help identify and resolve common issues such as rooms being too cold or hot, or lack of hot water.
Regular inspection and maintenance by a qualified heating contractor are crucial for ensuring trouble-free, energy-efficient, and environmentally responsible operation. Annual cleaning of the boiler is recommended.
For further assistance, contact a qualified Viessmann service technician.
