Siemens RVL470 Basic Documentation page 5

Siemens Building Technologies
Landis & Staefa Division
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
Basic Documentation RVL470
Contents
CE1P2522E / 30.03.2000
TOC-III