What you should know about your heating system
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Logamatic 2107 controls - We reserve the right to make any changes due to technical modifications. 9
Why do you need a heating system controls?
The heating controls ensures comfortable heat and
economical consumption of fuel and electrical energy.
It switches the heat generator (boiler and burner) and
pumps ON, if there is a heat demand. In doing so,
it utilizes the components of your heating system at the
correct time.
Furthermore, your heating system records different
variables which influence the room temperature and
compensates to minimize their effect.
What does the heating controls calculate?
Modern heating controls calculate the boiler
temperature required (the so-called supply temperature)
subject to the outdoor temperature. The relationship
between the outdoor temperature and the supply
temperature is described as the characteristic heating
curve. The lower the outdoor temperature, the higher
the supply temperature must be to compensate for
increased heat losses.
The heating controls can operate in three control modes:
– outdoor reset temperature control
– room temperature control
– outdoor reset temperature control with room
temperature influence
Fig. 3 Characteristic heating curve (example)
176 (80)
158 (70)
140 (60)
122 (50)
104 (40)
86 (30)
68 (20)
68 60 50 41 32 23 14 5
(+20) (+15) (+10) (+5) (±0) (-5) (-10) (-15)
Outdoor temperature in °F (°C)
Supply temperature in °F (°C)
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