CE1P2522E / 30.03.2000
Basic Documentation RVL470
Siemens Building Technologies
28/68
Function block "Space heating"
Landis & Staefa Division
8.7. Generation of setpoint
8.7.1. Weather-compensated control
Weather-compensated control is used with plant types 1, 2 and 3.
The setpoint can be generated in two different ways:
•
In function of the outside temperature via the heating curve (for setting, refer to sec-
tion "8.6. Heating curve"). The temperature used is the composite outside tempera-
ture
•
Manual preselection of a constant setpoint. This is accomplished by bridging terminals
H2–M. It is possible to choose whether the setpoint shall be absolute or used as a
minimum limit value (refer to section "13. Function block "Service functions and gen-
eral settings"")
Composite outside
temperature
Setting knob
room unit *
Heating curve
Setting knob
on controller
Flow temperature
setpoint T
Vw
Setpoint on
operating line 165
Parallel displacement of
heating curve, operating line 72
LPB
SYNERGYR
OZW30
Room setpoint
or
s
1 + s
20 °C
Operating line
1, 2 oder 3
1 + s
25
24
B
0
1e
LPB
Data bus
OZW30 SYNERGYR central unit
s
Slope
*
Active only with room unit level
The impact of the central unit OZW30 is described in section "17.1.4. Combination with
SYNERGYR central unit OZW30".
8.7.2. Demand-compensated control
Demand-compensated control is used with plant types 4, 5 and 6. The setpoint is deliv-
ered to the RVL470 via LPB in the form of a heat demand signal. In that case, the out-
side temperature will not be taken into consideration.