Viessmann boiler manuals
If desired, the mounting bracket may be fitted and the system pipework and flue system completed and pre-filled prior to the boiler being fitted. Internal frost protection and an electronic control unit is fitted as standard equipment and the boiler may be used with any suitable
The boiler is supplied with a standard concentric air and flue duct system 125mm diameter (5 in), which is suitable for a wall thickness of up to 360 mm (14 in) for a rear flue or 345 mm (13 3/5 in) for a side flue with minimum clearances. The duct assembly is connected to the boiler by a multidirectional turret, which can exit the boiler in any horizontal direction. Extension ducts may be fitted up to a total length of 10 m (393 in).