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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the heating engineer settings
18.10.2002
4.212 Outside temperature for start and end of lift
of the reduced room temperature setpoint
When the outside temperature approaches the heating system’s design temperature,
the system’s reserve capacity becomes smaller and smaller. As a result, heating up
from the reduced to the nominal room temperature setpoint takes more time.
To prevent this, the reduced room temperature setpoint is appropriately raised when
outside temperatures are low.
Setting range
Unit
Factory setting
733: Zeile734...10
734: -30…line 733
°C
°C
-5
-10
Operating lines 733 and 734 define the switching points for the start and end of lift of
the reduced room temperature setpoint.
Defines the
start
of lift of the reduced room temperature setpoint.
Between the 2 temperatures set on operating lines 733 and 734, the reduced room
temperature setpoint will be raised in a linear fashion.
Defines the
end
of lift of the reduced room temperature setpoint.
At this outside temperature, the reduced room temperature setpoint will be raised to the
level of the nominal room temperature setpoint.
23
9
2Z
59
-10
-5
T
R
T
N
T
A
Tn
Nominal room temperature setpoint according to the adjustment made with the setting knob of the
controller or room unit
T
R
Room
temperature
TA Outside
temperature
27
Reduced room temperature setpoint
Description
Setting
Effect
Example
