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Siemens RVD240 User Manual
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Edition 3.0
Controller series D
CE1P2384en
27.05.2004
Siemens Building Technologies
HVAC Products
RVD240
District Heating and Domestic Hot Water Controller
Basic Documentation
2
Table of Contents
Default Chapter
3
Table of Contents
3
1 Summary
13
Brief Description and Key Features
13
Type Summary
13
Equipment Combinations
13
Suitable Sensors
13
Suitable Room Units
14
Suitable Valve Actuators
14
Communication
14
Documentation
14
2 Use
15
Types of Plant
15
Types of Houses and Buildings
15
Types of Heating Systems
15
Heating Circuit Functions
15
Functions
16
Auxiliary Functions
16
3 Fundamentals
18
Key Technical Features
18
Function Blocks
18
Plant Types
18
Operating Modes
22
Heating Circuit Control
22
Heating
23
Manual Operation
23
D.h.w. Heating
23
4 Acquisition of Measured Values
24
General
24
Flow Temperature Heating Circuit
24
Types of Sensors
24
Handling Faults
24
Outside Temperature (B9)
24
Room Temperature (A6)
25
Types of Sensors
25
Handling Faults
25
Room Model
25
Temperature (B3)
25
Measured Variable
25
Handling Faults
26
Storage Tank Temperature (B31)
26
Measured Variable
26
Types of Sensors
26
Storage Tank or Return Temperature (B32)
26
Handling Faults
27
Return Temperature (B7, B71 and B72)
27
Measurement
27
Types of Sensors
27
5 Function Block Space Heating
28
Operating Lines
28
Settings and Displays
28
Heating Program
29
6 Function Block Clock Settings
30
Operating Lines
30
Entries
30
7 Function Block End-User D.h.w
31
Operating Lines
31
Heating Program
31
Adjustment of Setpoints
31
8 Function Block Display of Actual Sensor Values
32
Operating Lines
32
Displays
32
9 Function Block Holiday Settings
33
Operating Lines
33
Holiday Program
33
10 Function Block Indication of Errors
34
Operating Line
34
Indication of Errors
34
11 Function Block Plant Configuration
35
Operating Lines
35
Parameters to be Set
35
Plant Type
35
Input B71 / U1
35
Circulating Pump
36
Input H5
36
Control of Variable Speed Pump
36
12 Function Block Space Heating
40
Operating Lines
40
Compensating Variables
40
Outside Temperature
40
Room Temperature
41
Heating Curve
42
Generation of Setpoint
43
Display of Setpoint
43
Setpoint of Weather-Compensated Control
43
Setpoint of Room-Compensated Control
44
Setpoint of Weather-Compensated Control with Room Influence
44
Heating Circuit Control
45
Weather-Compensated Control
45
Room-Compensated Control
45
Weather-Compensated Control with Room Influence
45
Automatic ECO Function
46
Fundamentals
46
Compensating Variables and Auxiliary Variables
46
Heating Limit
47
Mode of Operation of ECO Function 1
47
Mode of Operation of ECO Function 2
47
Pump Overrun
47
Maximum Limitation of the Room Temperature
47
Optimization
48
Definition and Purpose
48
Fundamentals
48
Process
49
Room Model Temperature
49
Optimum Stop Control
50
Quick Setback
50
Optimum Start Control
50
Maximum Rate of Flow Temperature Increase
51
Frost Protection for the Building
51
General
51
Mode of Operation with Room Sensor
51
Mode of Operation Without Room Sensor
51
Protective Functions
52
Pump Kick
52
Valve Kick
52
Shutdown of Pump
52
Pump and Mixing Valve Overrun
52
13 Function Block Valve Actuator of Heat Converter
54
Operating Lines
54
Mode of Operation
54
Control Process
54
Maximum Limitation of the Flow Temperature
54
Minimum Limitation of the Flow Temperature
54
External Heat Demand at Input H5
55
External Heat Demand at Input U1
55
14 Function Block Valve Actuator Heating Circuit
56
Operating Lines
56
Mode of Operation
56
Control Process
56
Maximum Limitation of the Flow Temperature
56
Minimum Limitation of the Flow Temperature
57
15 Function Block D.h.w. Heating
58
Operating Lines
58
Release of D.h.w. Heating
58
Control of the Circulating Pump
59
Switching Differential of D.h.w. Control
59
Legionella Function
59
Priority of D.h.w. Heating
59
General
59
Absolute Priority
60
Shifting Priority
60
No Priority
61
Pump Overrun
61
General
61
Intermediate Circuit Pump
61
Storage Tank Charging Pump
61
Frost Protection for D.h.w
62
Switching D.h.w. Heating off
62
16 H.w. Heating
63
Heating with Storage Tanks
63
General
63
Maximum Charging Time
63
Manual Storage Tank Heating
63
Forced Charging
63
Protection against Discharging
64
Protection against Overtemperatures
64
Storage Tank with Electric Immersion Heater
64
Heating with Stratification Storage Tank
64
General
64
Heating
65
Feeding the Circulating Water into the Heat Exchanger
65
Direct D.h.w. Heating
65
General
65
Protection against Cooling down
66
Siting the Sensors
66
Flow Switch
67
Compensation of Heat Losses through Control
67
Cold Water Sensor
68
17 Function Block Extra Legionella Functions
69
Operating Lines
69
Legionella Function
69
Setpoint
69
Time
69
Dwelling Time
69
Operation of Circulating Pump
70
Maximum Limitation of the Return Temperature
70
Mode of Operation
70
18 Function Block Valve Actuator D.h.w
72
Operating Lines
72
Mode of Operation
72
Control Process
72
Setpoint Boost
72
Charging Boost
73
Flow Temperature Boost
73
Maximum Setpoint of the D.h.w. Temperature
73
Charging with Two Storage Tank Sensors
73
Adjustable Load Limit
73
Adjustment to the Time of Year
73
Load Limit
74
Child-Proofing
74
19 Function Block Assignment of D.h.w
75
Operating Line
75
Assignment of D.h.w. Heating
75
20 Function Block LPB Parameters
76
Operating Lines
76
LPB Parameters
76
Addressing the Devices
76
Source of Time of Day
76
Bus Power Supply
77
Outside Temperature Source
77
21 Locking Signals
78
Fundamentals
78
Critical Locking Signals
78
Uncritical Locking Signals
78
General
78
Controller-Internal Uncritical Locking Signals
79
Uncritical Locking Signals from the Data Bus
79
22 Function Block Device Functions
80
Operating Lines
80
Actuator Pulse Lock
80
Frost Protection for the Plant
80
Principle
80
Mode of Operation with Outside Sensor
80
Mode of Operation Without Outside Sensor
81
Frost Protection for the Heating Circuit Flow
81
Flow Alarm
81
Heating Circuit and D.h.w. Circuit with Storage Tanks
81
Direct D.h.w. Heating Via Heat Exchanger
82
Winter- / Summertime Changeover
83
23 Function Block M-Bus Parameter
84
Operating Lines
84
General
84
Addressing and Identification
84
Baud Rate
84
Load Management
84
Load Management of D.h.w
84
Load Management of the Heating System
84
Resetting the Load Control Signals
85
Use on the LPB
85
Resolution of M-Bus Signals
85
24 Function Block PPS Parameter
86
Operating Lines
86
Suitable Devices
86
Impacts of a Room Unit on the Heating Circuits
86
25 Function Block Test and Display
87
Operating Lines
87
Sensor Test
87
Setpoint Test
87
Relay Test
88
Display of the Pump Speed
88
Display of the Digital Inputs
88
Limitations
89
Software Version
90
26 Function Block DRT and Maximum Limitation of the Return Temperature
91
Operating Lines
91
Maximum Limitation of the Primary Return Temperature
91
General
91
Maximum Limitation in Heating Mode
92
Maximum Limitation in D.h.w. Mode
92
Maximum Limitation of the Secondary Return Temperature
93
Maximum Limitation of the Temperature Differential (DRT Function)
94
Mode of Operation
94
Purpose
94
Integral Action Time of the Limitation Functions
94
27 Function Block Various Functions
95
Operating Lines
95
Limitation Function at Contact H5
95
Suppression of Hydraulic Creep
96
Mode of Operation
96
Raising the Reduced Room Temperature Setpoint
96
28 Function Block Operation Locking Functions
98
Operating Lines
98
Locking Settings on the Software Side
98
Locking of Setting Level "Locking Functions" on the Hardware Side
98
29 Combination with PPS Devices
99
General
99
Combination with Room Unit QAW50
99
Overriding the Operating Mode
99
Knob for Room Temperature Readjustments
100
Controller with Operation Lock
100
Combination with Room Unit QAW70
100
General
100
Overriding the Operating Mode
101
Knob for Readjusting the Room Temperature
101
Impact of the Individual QAW70 Operating Lines on the RVD240
101
Controller with Operation Lock
102
Entry of Holiday Periods
102
Room Temperature Sensor QAA10
102
30 Manual Operation
103
31 Handling
104
Operation
104
General
104
Analog Operating Elements
105
Digital Operating Elements
105
Controller in "Nonoperated State
106
Safety Concept
106
Setting Levels and Access Rights
106
Commissioning
107
Installation Instructions
107
Operating Lines
107
Installation
107
Mounting Location
107
Mounting Choices
107
Electrical Installation
108
32 Engineering
109
Connection Terminals
109
Relays
110
PWM Output
110
Lightning Protection in M-Bus Plants
110
Connection Diagrams
111
Low-Voltage Side
111
Mains Voltage Side
111
33 Mechanical Design
112
Basic Design
112
Dimensions
112
34 Technical Data
113
4
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Siemens RVD240 Specifications
General
Input voltage
24 V AC/DC
Output voltage
0-10 V
Power consumption
5 VA
Operating temperature
0...+50 °C
Storage temperature
-20 °C to +70 °C
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