Viessmann Vitotrol 100-E Modulation Control

Viessmann Vitotrol 100-E Modulation Control

The Viessmann Vitotrol 100-E is a wireless, wall-mounted room load compensator designed to provide precise control over your heating system. Unlike a traditional on/off thermostat, the Vitotrol 100-E communicates with compatible Viessmann boilers using the One Base communication protocol, allowing the boiler to modulate its output according to the heating demand in the room. This means the boiler can adjust its output rather than simply switching on and off, helping to maintain a more consistent room temperature while supporting efficient operation. No outdoor temperature sensor is required for this type of modulation control.

Comfortable Heating with Smart Modulation

The Vitotrol 100-E can maintain your preferred room temperature using either a pre-programmed heating schedule or a fixed temperature setpoint. You can choose from up to three room temperature settings — Reduced, Normal and Comfort — making it easy to adapt the heating to different times of the day. A temporary override function also allows you to manually adjust the temperature without permanently changing your programmed schedule. The temporary setting remains active until the next scheduled change.

Two-Way Communication with the Boiler

The Vitotrol 100-E uses two-way communication with the compatible boiler, allowing the thermostat and boiler to exchange information. This enables the boiler to adjust its output to match the heating requirement rather than operating as a simple on/off system. The system can also display boiler fault information on the thermostat, making it easier to identify when the heating system requires attention.

Easy Wireless Installation

Installation is designed to be straightforward because no additional receiver is required. The receiver is factory-fitted inside the compatible boiler, while the Vitotrol 100-E communicates wirelessly with it. The thermostat is battery powered and requires 2 x 1.5V AA batteries, meaning no cables are needed between the room controller and boiler. Its encrypted 2.4GHz low-power radio connection provides secure wireless communication.

Heating and Hot Water Control

The Vitotrol 100-E is designed to control one heating circuit and can also provide domestic hot water temperature regulation on compatible systems. Separate time programs can be set for heating and hot water, with daily and weekly scheduling available. The maximum and minimum temperature setpoints can also be limited, while the One Base protocol can be used to limit the maximum boiler setpoint temperature.

Clear Illuminated Display

The illuminated display provides an easy-to-read view of the room temperature, time and current operating status. This makes it simple to check the heating system and adjust settings when required. Automatic software updates are also supported, helping the controller remain up to date without requiring manual software installation.

ViCare App Compatibility

The Vitotrol 100-E can be paired with compatible Vitodens boilers using the ViGuide App and is fully compatible with the ViCare application. A ViCare repeater can also be used where additional signal range is required, helping improve wireless connectivity.

Compatible Boiler Models

The Vitotrol 100-E is suitable for the latest Vitodens 100-W Combi/System boilers with a 4-pipe installation, including models B1KF and B1HF, as well as the Vitodens 111-W B1LF. It is also suitable for the latest Vitodens 050-W B0KA and B0HA models from October 2024, provided the boiler has a serial number beginning 722860********. It is important to check compatibility before purchasing, as the Vitotrol 100-E has specific system requirements and is not suitable for every Viessmann boiler configuration.

Important Compatibility Information

The Vitotrol 100-E is designed for system boilers using a 4-pipe system configuration. It must not be used with S-plan or Y-plan systems. It is not compatible with Vitodens 100-W Heat Only boilers and cannot be used alongside weather compensation operation. The controller is intended for systems where room load compensation and One Base boiler modulation are being used.

Key Features

• Wireless wall-mounted room load compensator
• One Base communication protocol
• Modulates compatible boiler output for improved efficiency
• Two-way communication between thermostat and boiler
• No outdoor temperature sensor required
• No additional receiver required
• Factory-fitted receiver in compatible boiler
• Designed for one heating circuit
• Domestic hot water temperature regulation
• Daily and weekly heating programmes
• Heating and hot water time programmes
• Reduced, Normal and Comfort room temperature setpoints
• Temporary temperature override function
• Maximum and minimum temperature setpoint limits
• Maximum boiler setpoint temperature can be limited via One Base
• Boiler fault indication on thermostat display
• Illuminated display showing room temperature, time and operating status
• Encrypted 2.4GHz low-power radio connection
• Battery powered with 2 x 1.5V AA batteries
• Automatic software update capability
• Compatible with the ViCare application
• Can be paired with compatible Vitodens boilers using the ViGuide App
• ViCare repeater compatible for extended wireless signal range
• Suitable for compatible 4-pipe system boiler installations

Frequently Asked Questions

Is the Viessmann Vitotrol 100-E an on/off thermostat?

No. The Vitotrol 100-E is not an on/off room thermostat. It uses the One Base communication protocol to communicate with compatible Viessmann boilers and modulate the boiler's output according to the heating demand in the room. This allows the boiler to adjust its output rather than simply switching on and off.

Which Viessmann boilers are compatible with the Vitotrol 100-E?

The Vitotrol 100-E is suitable for the latest Vitodens 100-W Combi/System models B1KF and B1HF with a 4-pipe installation, the Vitodens 111-W B1LF, and selected Vitodens 050-W B0KA/B0HA boilers from October 2024 with serial numbers beginning 722860. Compatibility should always be checked against the exact boiler model and serial number.

Can the Vitotrol 100-E be used with an S-plan or Y-plan heating system?

No. The Vitotrol 100-E is designed for compatible system boilers using a 4-pipe configuration and must not be used with S-plan or Y-plan systems. It is also not compatible with Vitodens 100-W Heat Only boilers or weather compensation operation.