14
4.3 - A smart and
intelligent boiler
When connected to an outside sensor
(optional), this boiler is designed to
always work at the maximum
efficiency. It will automatically change
the supply temperature in relation with
the outdoor temperature.
The graph in figure 4 shows an
example on how it can work.
This graph represent an installation
where the supply and return
temperatures are 139°F and 115°F
respectively , and the outside
temperature is 23°F. The outdoor
sensor drives the boiler, to
progressively reduce the supply
temperature and thereby optimize the
efficiency. It changes from 87% when
outside is -10°F, to 94.8% when
outside is 23°F and up to 98% when
the outside temperature rises up to
67°F.
Figure 4 - Relation between outdoor temperature, heating
temperature and efficiency
4 - FUNCTION OVERVIEW
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