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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of heating engineer settings 26.03.2001
4.43.2 Without room influence
The composite outside temperature is used as the compensating variable. In the case
of floor heating systems, the maximum forward shift should be longer than with radiator
systems.
Using the parameter for the constant of quick setback and optimum start control (KON),
the forward shift can be matched the building dynamics.
Forward shift tE in hours and minutes with optimum start control without room
influence:
TAgem KON
0 4 8 12 16 20
-20 0 1h20 2h40 4h00 5h20 6h00
-10 0 0h50 1h50 2h40 3h40 4h30
0 0 0h30 1h00 1h30 2h00 2h30
+10 0 0 0h10 0h10 0h20 0h20
tE
TAgem Composite outside temperature
tE Forward shift
KON Parameter for quick setback and optimum start control without room influence
KON = 0: Function deactivated
Note: KON also acts on quick setback
Small KON: For light building structures that can be heated up fairly
quickly
Large KON: For heavy, well insulated building structures whose heating
up time is fairly long
4.43.3 With room influence
Optimum start control acts only when room influence is active.
The switch-on time for the heating (change to nominal level) is selected such that, at
the beginning of the occupancy time according to the heating program, the room
temperature reached will be the room temperature setpoint - 0.25 K.
The correct switch-on time is determined by adaption.
Parameter KON:
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