Domestic Product Guide - Viessmann

Control technology
Controls
Viessmann boilers have the added benefit of advanced control technology.
Viessmann controls are easy to install,
maintain and operate and benefit from fault
logging and diagnostic systems. They switch
easily between Winter and Summer settings
and some models have useful short cuts,
including holiday, party and economy
settings. All Vitodens boilers will operate
with Viessmann and non-Viessmann
external controls.
Lambda Pro Control
The Lambda Pro combustion controller works
along side the burner to constantly monitor
the air to gas ratio. Instead of the gas mix
remaining fixed from installation, the mix
is automatically adjusted to maintain the
correct ratio – in a similar way to the fuel
management system in your car engine.
This also means that on-site commissioning
time is reduced.
The Lambda Pro is designed to work
efficiently irrespective of the quality of the
gas – a factor which will become more and
more important as international gas supplies
become less reliable.
The control replaces the traditional gas valve
and changing to LPG takes just a few seconds
– with no replacement parts! The Lambda
Pro is an integral component of the Vitodens
200-W, Vitodens 222-F and Vitodens 242-F.
Weather Compensation
Weather compensation controls are a great,
low cost way to make a boiler operate more
efficiently. They can save up to 12% of annual
fuel bills – that's on top of the big savings that
you get from changing to a condensing boiler.
The boiler is connected to a small sensor on
the outside of the building. When the
temperature changes outside, the boiler
responds and starts to increase or decrease
the radiator temperature, to compensate.
This pro-active mechanism means that
people inside the building won’t even notice
that the temperature outside has changed.
These constant small changes also mean that
the boiler is able to operate at the minimum
temperature required to keep the rooms
warm. This keeps the return temperature as
low as possible and a return temperature of
57°C or less means the boiler can condense
as it is designed to. Weather compensation
maximises the condensing period of the boiler
and results in significant fuel savings.