Siemens Building Technologies
Basic Documentation RVL470
CE1P2522E / 30.03.2000
Landis & Staefa Division
Contents
TOC-III
8.6.
Heating curve.................................................................................................25
8.6.1.
Purpose .........................................................................................................25
8.6.2.
Basic setting...................................................................................................25
8.6.2.1.
Settings with the bar ......................................................................................26
8.6.2.2.
Settings on operating lines.............................................................................26
8.6.2.3.
Selection of setting.........................................................................................26
8.6.3.
Deflection .......................................................................................................26
8.6.4.
Parallel displacement of heating curve ..........................................................27
8.6.5.
Display of setpoints........................................................................................27
8.7.
Generation of setpoint....................................................................................28
8.7.1.
Weather-compensated control .......................................................................28
8.7.2.
Demand-compensated control .......................................................................28
9.
Function block "Three-position actuator heating circuit"..........................29
9.1.
Operating lines...............................................................................................29
9.2.
Limitations......................................................................................................29
9.2.1.
Limitations of the flow temperature ................................................................29
9.2.2.
Setpoint increase ...........................................................................................29
9.3.
Three-position control ....................................................................................30
9.4.
Excess mixing valve temperature ..................................................................30
9.5.
Locking of pulses ...........................................................................................30
10.
Function block "Boiler"...............................................................................31
10.1.
Operating lines...............................................................................................31
10.2.
Operating mode .............................................................................................31
10.3.
Limitations......................................................................................................31
10.3.1.
Maximum limitation of the boiler temperature ................................................31
10.3.2.
Minimum limitation of the boiler return temperature .......................................32
10.4.
Two-position control.......................................................................................32
10.4.1.
Control with a single-stage burner .................................................................32
10.4.2.
Control with a two-stage burner .....................................................................33
10.4.2.1. Setting parameters.........................................................................................33
10.4.2.2. Control 33
10.4.3.
Frost protection for the boiler .........................................................................34
10.4.4.
Protective boiler startup .................................................................................34
10.4.5.
Protection against boiler overtemperatures....................................................35
10.5.
Operating mode of pump M1 .........................................................................36
11.
Function block "Setpoint of return temperature limitation" ....................37
11.1.
Operating line.................................................................................................37
11.2.
Description .....................................................................................................37
11.3.
Minimum limitation of the return temperature.................................................37
11.3.1.
Acquisition of the measured values ...............................................................37
11.3.2.
Mode of operation ..........................................................................................37
11.3.3.
Mode of operation with a single unit (with no bus) .........................................38
11.3.4.
Mode of operation in interconnected plants ...................................................38
11.3.4.1. Central impact of limitation.............................................................................38
11.3.4.2. Local impact of limitation................................................................................38
12.
Function block "District heat" ....................................................................39
