Parallel Displacement Of Heating Curve; Display Of Setpoints - Siemens RVL470 Basic Documentation

8.6.4. Parallel displacement of heating curve

8.6.5. Display of setpoints

Siemens Building Technologies
Landis & Staefa Division
The heating curve can be displaced parallel:
•
Manually with the setting knob for room temperature readjustments. The readjustment
can be made by the end-user and covers a maximum range of –4.5...+4.5 °C room
temperature
•
Manually on operating line 72
This parallel displacement of the heating curve is calculated as follows:
Parallel displacement ∆T
Parallel displacement of the heating curve
T
V
100
90
80
70
60
50
40
30
30
20
10
0
s Slope
T Outside temperature
A
T Flow temperature
V
T Room temperature setpoint
WR
Two setpoints result from the basic setting, the position of the setting knob and – if
made – the entry on operating line 72, which can be called up on operating line 166:
•
TV1, resulting flow temperature setpoint at an outside temperature of +15 °C
•
TV2, resulting flow temperature setpoint at an outside temperature of –5 °C
These two current setpoints determine the actual heating curve from which – in function
of the composite outside temperature – the current flow temperature setpoint is gener-
ated. It can be called up on operating line 165 (also refer to section "13. Function block
"Service functions and general settings"").
Basic Documentation RVL470
Function block "Space heating"
= ( ∆T + ∆T
Flow Knob Operating line 72
10 0
10
0
) ( 1 + s )
*
-10 -20
-30
CE1P2522E / 30.03.2000
T
A
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