Viessmann Vitodens 100-W Combination Domestic Product Manual page 20

Viessmann 4-pipe
principle
Viessmann 4-pipe system
Vitodens 100-W System
Vitodens 200-W System
Optional weather
compensation sensor
*
Viessmann Vitodens system boilers up to
35 kW installed together with a Vitocell 200
or 300 unvented cylinder are the perfect
combination to meet G3 building regulations
without the need for an energy cut-off valve
and cylinder overheat thermostat; these are
integrated into the boiler.
Installation time will be reduced by up to 1 day
as the following are no longer required:
Energy cut off valve or safety valve
Expansion vessel and pump
Gauge and cylinder overheat thermostat
Part P certification
* Cylinder overheat thermostat is supplied as standard for when the cylinder is used without a Viessmann
boiler, but in this installation is obsolete.
Compatibility with solar
As a manufacturer of the full range of renewable
energy technologies all Viessmann boilers
are 100% compatible with solar thermal
panels. The Vitodens 100-W range has the
added advantage of boiler suppression, when
using Viessmann solar panels and a dual coil
cylinder. This means that the hot water system
will always take advantage of solar power,
whenever solar energy is available and the
boiler will only fire to 'top up' the DHW heating
process when absolutely necessary – resulting
in significant fuel savings.