Heat Pump, Split System, Single Service, 3 phase
Maintenance Document 1394-1 19
20
30
40
50
60
70
-20,0-15,0-10,0-5,00,05,010,015,020,0
Outdoor Temperature (°C)
Heating Flow Temperature (°C)
0,25
0,5
0,75
1
1,25
1,5
1,75
2
Heating Curves
Graph 1: Heating Curves
The heating curves shown above refer to a 20°C
room temperature setpoint.
The heating curve slope (setting 720) determines the
impact of outdoor temperature variations on heating
flow temperature variations. The steeper the slope,
the higher will be the increase in the heating circuit
water flow temperature which occurs when the
outdoor temperature increases slightly.
The heating curve offset (setting 721) changes the
flow temperature of all curves, without the slope
being modified.
The corrective actions in case of discomfort are listed
in the following table:
Feeling of discomfort Corrective action
By mild weather By cold weather Heating curve slope Offset
Too cold Too warm Decrease Increase
Too cold OK Decrease Increase
Too cold Too cold OK Increase
OK Too warm Decrease OK
OK OK OK OK
OK Too cold Increase OK
Too warm Too warm OK Decrease
Too warm OK Increase Decrease
Too warm Too cold Increase Decrease
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