What you should know about your heating system
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Logamatic 4121, 4122 and 4126 - Subject to technical modifications.
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Why do you need a control unit?
The control unit ensures convenient heat and
economical consumption of fuel and electrical energy.
It starts the heat source (boiler and burner) and pumps
when warm rooms or DHW are required. In doing so,
it utilises the components of your heating system at the
correct time.
Furthermore, your control unit records different
variables that influence the room temperature and
compensates for these.
What does the control unit calculate?
Advanced control units calculate the temperature
required within the boiler (the so-called flow
temperature) subject to the outside temperature.
The relationship between the outside temperature and
the flow temperature is described as the heating curve.
The lower the outside temperature, the higher the flow
temperature must be.
The control unit can operate in three control modes:
–
Weather-compensated control
–
Room temperature-dependent control
–
Weather-compensated control with room
temperature hook-up
Fig. 3
Heating circuit curve (example)
x
Outdoor temperature
y
Flow temperature
