Installation and service guide for the Viessmann Vitodens 111-W gas condensing boiler, covering safety, setup, commissioning and maintenance.
This document provides detailed safety instructions, installation steps, wiring diagrams and commissioning procedures for the Viessmann Vitodens 111-W wall‑mounted gas condensing boiler. It is intended for qualified contractors and includes guidance on gas, electrical and mechanical work, as well as required protective equipment.
The guide also covers system configuration, diagnostic menus, troubleshooting fault codes, and recommended maintenance actions such as draining, part replacement and cleaning. Appendices contain technical specifications, spare‑part lists and certification information.
| Heating output range | 3.2 to 32 kW |
|---|---|
| Fuel type | Natural gas and LPG |
| Loading cylinder capacity | 46 l |
| Expansion vessel capacity | 10 l |
| IP rating | IP X1 |
| Heat exchanger type | Inox‑Radial heat exchanger |
| Burner type | Modulating MatriX‑Plus burner |
| Circulation pump | Variable speed high‑efficiency pump |
The boiler has an IP rating of IP X1.
The boiler can deliver heating output from 3.2 kW up to 32 kW.