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Siemens Building Technologies Basic documentation RVD240 CE1P2384en

HVAC Products Glossary 27.05.2004

Table of Contents

Default Chapter3
- Table of Contents3
1 Summary13
- Brief Description and Key Features13
- Type Summary13
- Equipment Combinations13
- Suitable Sensors13
- Suitable Room Units14
- Suitable Valve Actuators14
- Communication14
- Documentation14
2 Use15
- Types of Plant15
- Types of Houses and Buildings15
- Types of Heating Systems15
- Heating Circuit Functions15
- Functions16
- Auxiliary Functions16
3 Fundamentals18
- Key Technical Features18
- Function Blocks18
- Plant Types18
- Operating Modes22
- Heating Circuit Control22
- Heating23
- Manual Operation23
- D.h.w. Heating23
4 Acquisition of Measured Values24
- General24
- Flow Temperature Heating Circuit24
- Types of Sensors24
- Handling Faults24
- Outside Temperature (B9)24
- Room Temperature (A6)25
- Types of Sensors25
- Handling Faults25
- Room Model25
- Temperature (B3)25
- Measured Variable25
- Handling Faults26
- Storage Tank Temperature (B31)26
- Measured Variable26
- Types of Sensors26
- Storage Tank or Return Temperature (B32)26
- Handling Faults27
- Return Temperature (B7, B71 and B72)27
- Measurement27
- Types of Sensors27
5 Function Block Space Heating28
- Operating Lines28
- Settings and Displays28
- Heating Program29
6 Function Block Clock Settings30
- Operating Lines30
- Entries30
7 Function Block End-User D.h.w31
- Operating Lines31
- Heating Program31
- Adjustment of Setpoints31
8 Function Block Display of Actual Sensor Values32
- Operating Lines32
- Displays32
9 Function Block Holiday Settings33
- Operating Lines33
- Holiday Program33
10 Function Block Indication of Errors34
- Operating Line34
- Indication of Errors34
11 Function Block Plant Configuration35
- Operating Lines35
- Parameters to be Set35
- Plant Type35
- Input B71 / U135
- Circulating Pump36
- Input H536
- Control of Variable Speed Pump36
12 Function Block Space Heating40
- Operating Lines40
- Compensating Variables40
- Outside Temperature40
- Room Temperature41
- Heating Curve42
- Generation of Setpoint43
- Display of Setpoint43
- Setpoint of Weather-Compensated Control43
- Setpoint of Room-Compensated Control44
- Setpoint of Weather-Compensated Control with Room Influence44
- Heating Circuit Control45
- Weather-Compensated Control45
- Room-Compensated Control45
- Weather-Compensated Control with Room Influence45
- Automatic ECO Function46
- Fundamentals46
- Compensating Variables and Auxiliary Variables46
- Heating Limit47
- Mode of Operation of ECO Function 147
- Mode of Operation of ECO Function 247
- Pump Overrun47
- Maximum Limitation of the Room Temperature47
- Optimization48
- Definition and Purpose48
- Fundamentals48
- Process49
- Room Model Temperature49
- Optimum Stop Control50
- Quick Setback50
- Optimum Start Control50
- Maximum Rate of Flow Temperature Increase51
- Frost Protection for the Building51
- General51
- Mode of Operation with Room Sensor51
- Mode of Operation Without Room Sensor51
- Protective Functions52
- Pump Kick52
- Valve Kick52
- Shutdown of Pump52
- Pump and Mixing Valve Overrun52
13 Function Block Valve Actuator of Heat Converter54
- Operating Lines54
- Mode of Operation54
- Control Process54
- Maximum Limitation of the Flow Temperature54
- Minimum Limitation of the Flow Temperature54
- External Heat Demand at Input H555
- External Heat Demand at Input U155
14 Function Block Valve Actuator Heating Circuit56
- Operating Lines56
- Mode of Operation56
- Control Process56
- Maximum Limitation of the Flow Temperature56
- Minimum Limitation of the Flow Temperature57
15 Function Block D.h.w. Heating58
- Operating Lines58
- Release of D.h.w. Heating58
- Control of the Circulating Pump59
- Switching Differential of D.h.w. Control59
- Legionella Function59
- Priority of D.h.w. Heating59
- General59
- Absolute Priority60
- Shifting Priority60
- No Priority61
- Pump Overrun61
- General61
- Intermediate Circuit Pump61
- Storage Tank Charging Pump61
- Frost Protection for D.h.w62
- Switching D.h.w. Heating off62
16 H.w. Heating63
- Heating with Storage Tanks63
- General63
- Maximum Charging Time63
- Manual Storage Tank Heating63
- Forced Charging63
- Protection against Discharging64
- Protection against Overtemperatures64
- Storage Tank with Electric Immersion Heater64
- Heating with Stratification Storage Tank64
- General64
- Heating65
- Feeding the Circulating Water into the Heat Exchanger65
- Direct D.h.w. Heating65
- General65
- Protection against Cooling down66
- Siting the Sensors66
- Flow Switch67
- Compensation of Heat Losses through Control67
- Cold Water Sensor68
17 Function Block Extra Legionella Functions69
- Operating Lines69
- Legionella Function69
- Setpoint69
- Time69
- Dwelling Time69
- Operation of Circulating Pump70
- Maximum Limitation of the Return Temperature70
- Mode of Operation70
18 Function Block Valve Actuator D.h.w72
- Operating Lines72
- Mode of Operation72
- Control Process72
- Setpoint Boost72
- Charging Boost73
- Flow Temperature Boost73
- Maximum Setpoint of the D.h.w. Temperature73
- Charging with Two Storage Tank Sensors73
- Adjustable Load Limit73
- Adjustment to the Time of Year73
- Load Limit74
- Child-Proofing74
19 Function Block Assignment of D.h.w75
- Operating Line75
- Assignment of D.h.w. Heating75
20 Function Block LPB Parameters76
- Operating Lines76
- LPB Parameters76
- Addressing the Devices76
- Source of Time of Day76
- Bus Power Supply77
- Outside Temperature Source77
21 Locking Signals78
- Fundamentals78
- Critical Locking Signals78
- Uncritical Locking Signals78
- General78
- Controller-Internal Uncritical Locking Signals79
- Uncritical Locking Signals from the Data Bus79
22 Function Block Device Functions80
- Operating Lines80
- Actuator Pulse Lock80
- Frost Protection for the Plant80
- Principle80
- Mode of Operation with Outside Sensor80
- Mode of Operation Without Outside Sensor81
- Frost Protection for the Heating Circuit Flow81
- Flow Alarm81
- Heating Circuit and D.h.w. Circuit with Storage Tanks81
- Direct D.h.w. Heating Via Heat Exchanger82
- Winter- / Summertime Changeover83
23 Function Block M-Bus Parameter84
- Operating Lines84
- General84
- Addressing and Identification84
- Baud Rate84
- Load Management84
- Load Management of D.h.w84
- Load Management of the Heating System84
- Resetting the Load Control Signals85
- Use on the LPB85
- Resolution of M-Bus Signals85
24 Function Block PPS Parameter86
- Operating Lines86
- Suitable Devices86
- Impacts of a Room Unit on the Heating Circuits86
25 Function Block Test and Display87
- Operating Lines87
- Sensor Test87
- Setpoint Test87
- Relay Test88
- Display of the Pump Speed88
- Display of the Digital Inputs88
- Limitations89
- Software Version90
26 Function Block DRT and Maximum Limitation of the Return Temperature91
- Operating Lines91
- Maximum Limitation of the Primary Return Temperature91
- General91
- Maximum Limitation in Heating Mode92
- Maximum Limitation in D.h.w. Mode92
- Maximum Limitation of the Secondary Return Temperature93
- Maximum Limitation of the Temperature Differential (DRT Function)94
- Mode of Operation94
- Purpose94
- Integral Action Time of the Limitation Functions94
27 Function Block Various Functions95
- Operating Lines95
- Limitation Function at Contact H595
- Suppression of Hydraulic Creep96
- Mode of Operation96
- Raising the Reduced Room Temperature Setpoint96
28 Function Block Operation Locking Functions98
- Operating Lines98
- Locking Settings on the Software Side98
- Locking of Setting Level "Locking Functions" on the Hardware Side98
29 Combination with PPS Devices99
- General99
- Combination with Room Unit QAW5099
- Overriding the Operating Mode99
- Knob for Room Temperature Readjustments100
- Controller with Operation Lock100
- Combination with Room Unit QAW70100
- General100
- Overriding the Operating Mode101
- Knob for Readjusting the Room Temperature101
- Impact of the Individual QAW70 Operating Lines on the RVD240101
- Controller with Operation Lock102
- Entry of Holiday Periods102
- Room Temperature Sensor QAA10102
30 Manual Operation103
31 Handling104
- Operation104
- General104
- Analog Operating Elements105
- Digital Operating Elements105
- Controller in "Nonoperated State106
- Safety Concept106
- Setting Levels and Access Rights106
- Commissioning107
- Installation Instructions107
- Operating Lines107
- Installation107
- Mounting Location107
- Mounting Choices107
- Electrical Installation108
32 Engineering109
- Connection Terminals109
- Relays110
- PWM Output110
- Lightning Protection in M-Bus Plants110
- Connection Diagrams111
- Low-Voltage Side111
- Mains Voltage Side111
33 Mechanical Design112
- Basic Design112
- Dimensions112
34 Technical Data113

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