Siemens RVL471 Basic Documentation
RVL471
Heating and Domestic Hot Water Controller
Basic Documentation
Edition: 2.2
Controller series: C
CE1P2524E
23.10.2002
Siemens Building Technologies
HVAC Products
2/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 23.10.2002
Contents
1 Summary........................................................................................................11
1.1 Brief description and key features .................................................................11
1.2 Type summary...............................................................................................11
1.3 Equipment combinations................................................................................11
1.3.1 Suitable sensors ............................................................................................11
1.3.2 Suitable room units........................................................................................12
1.3.3 Suitable actuators..........................................................................................12
1.3.4 Communication..............................................................................................12
1.3.5 Passing on of heat demand signal.................................................................12
1.3.6 Documentation...............................................................................................12
2 Use.................................................................................................................13
2.1 Types of plant ................................................................................................13
2.2 Types of houses and buildings ......................................................................13
2.3 Types of heating systems..............................................................................13
2.4 Functions .......................................................................................................13
3 Fundamentals................................................................................................15
3.1 Key technical features ...................................................................................15
3.1.1 Plant types with regard to heating circuit.......................................................15
3.1.2 Plant types with regard to d.h.w. heating.......................................................15
3.1.3 Function blocks..............................................................................................15
3.2 Plant types.....................................................................................................16
3.2.1 Selectable combinations................................................................................16
3.2.2 Heating circuit type 1 – space heating with mixing valve...............................17
3.2.3 Heating circuit type 2 – space heating with boiler..........................................17
3.2.4 Heating circuit type 3 – space heating with district heat................................18
3.2.5 Heating circuit type 4 – precontrol with mixing valve.....................................18
3.2.6 Heating circuit type 5 – precontrol with boiler................................................18
3.2.7 Heating circuit type 6 – precontrol with district heat ......................................19
3.2.8 D.h.w. plant type 0 – no d.h.w........................................................................19
3.2.9 D.h.w. plant type 1 – d.h.w. storage tank with charging pump.......................19
3.2.10 D.h.w. plant type 2 – d.h.w. storage tank with mixing valve...........................19
3.2.11 D.h.w. plant type 3 – storage tank with diverting valve..................................20
3.2.12 D.h.w. plant type 4 – instantaneous d.h.w. heating via heat exchanger........20
3.2.13 D.h.w. plant type 5 – only electric immersion heater .....................................20
3.2.14 Summary of plant types and plant combinations...........................................21
3.3 Setting levels, function blocks and plant types..............................................22
3.4 Heating circuit operating modes ....................................................................23
3.4.1 Automatic operation.......................................................................................23
3/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products Contents 23.10.2002
3.4.2 Continuously REDUCED heating.................................................................. 23
3.4.3 Continuously NORMAL heating .................................................................... 23
3.4.4 STANDBY ..................................................................................................... 23
3.5 D.h.w. operating modes ................................................................................ 23
3.6 Manual operation...........................................................................................24
3.7 Plant type and operating mode ..................................................................... 24
3.8 Operating state and operational level ...........................................................25
4 Acquisition of measured values ....................................................................26
4.1 Room temperature (A6, B5)...........................................................................26
4.1.1 Measurement ................................................................................................ 26
4.1.2 Handling faults ..............................................................................................26
4.1.3 Room model.................................................................................................. 26
4.2 Flow and boiler temperature (B1)..................................................................26
4.2.1 Measurement ................................................................................................ 26
4.2.2 Handling faults ..............................................................................................27
4.3 Outside temperature (B9).............................................................................. 27
4.3.1 Measurement ................................................................................................ 27
4.3.2 Handling faults ..............................................................................................27
4.4 Primary return temperature (B7) ...................................................................27
4.4.1 Measurement ................................................................................................ 27
4.4.2 Handling faults ..............................................................................................27
4.5 Secondary return temperature (B71)............................................................. 28
4.5.1 Measurement ................................................................................................ 28
4.5.2 Handling faults ..............................................................................................28
4.6 D.h.w. flow temperature (B3).........................................................................28
4.6.1 Measurement ................................................................................................ 28
4.6.2 Handling faults ..............................................................................................28
4.7 D.h.w. storage tank temperature (B31, B32)................................................. 28
4.7.1 Measurement ................................................................................................ 28
4.7.2 Handling faults ..............................................................................................28
5 Function block "Enduser space heating"....................................................... 30
5.1 Operating lines..............................................................................................30
5.2 Setpoints ....................................................................................................... 30
5.2.1 General..........................................................................................................30
5.2.2 Frost protection for the building..................................................................... 30
5.3 Heating program............................................................................................30
5.4 Holiday program............................................................................................ 31
6 Function block "Enduser d.h.w."....................................................................32
6.1 Operating lines..............................................................................................32
6.2 Setpoint.........................................................................................................32
4/118
Siemens Building Technologies Basic Documentation RV L471 CE1P2524E
HVAC Products Contents 23.10.2002
6.3 Actual value ...................................................................................................32
7 Function block "Enduser general"..................................................................33
7.1 Operating lines...............................................................................................33
7.2 Switching program 2......................................................................................33
7.3 Time of day and date.....................................................................................33
7.4 Indication of errors.........................................................................................34
8 Function block "Plant type"............................................................................35
8.1 Operating line.................................................................................................35
8.2 General..........................................................................................................35
9 Function block "Cascade slave".....................................................................36
9.1 Operating lines...............................................................................................36
9.2 Mode of operation..........................................................................................36
9.2.1 Boiler sequence release integral (KFI)...........................................................36
9.2.2 Boiler sequence reset integral (KRI)..............................................................36
10 Function block "Space heating".....................................................................37
10.1 Operating lines...............................................................................................37
10.2 ECO function .................................................................................................37
10.2.1 Compensating variables and auxiliary variables............................................37
10.2.2 Heating limits .................................................................................................38
10.2.3 Mode of operation..........................................................................................38
10.2.4 Operating modes and operating states..........................................................39
10.3 Room temperature source.............................................................................39
10.4 Optimization...................................................................................................39
10.4.1 Definition and purpose...................................................................................39
10.4.2 Fundamentals................................................................................................39
10.4.3 Process..........................................................................................................40
10.4.4 Room model temperature..............................................................................40
10.4.5 Optimum stop control.....................................................................................41
10.4.6 Quick setback ................................................................................................41
10.4.7 Optimum start control.....................................................................................42
10.4.8 Boost heating.................................................................................................42
10.5 Room functions..............................................................................................43
10.5.1 Maximum limitation of the room temperature.................................................43
10.5.2 Room influence..............................................................................................43
10.6 Heating curve.................................................................................................44
10.6.1 Purpose..........................................................................................................44
10.6.2 Basic setting ..................................................................................................44
10.6.3 Deflection.......................................................................................................45
10.6.4 Parallel displacement of heating curve..........................................................46
5/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products Contents 23.10.2002
10.6.5 Display of setpoints.......................................................................................46
10.7 Generation of setpoint................................................................................... 47
10.7.1 Weather-compensated control......................................................................47
10.7.2 Demand-compensated control......................................................................47
11 Function block "3-position actuator heating circuit".......................................48
11.1 Operating lines..............................................................................................48
11.2 Limitations.....................................................................................................48
11.2.1 Flow temperature limitations ......................................................................... 48
11.2.2 Setpoint rise .................................................................................................. 49
11.3 3-position control........................................................................................... 49
11.4 Auxiliary variables in interconnected plants .................................................. 49
11.4.1 Excess mixing valve or heat exchanger temperature.................................... 49
11.5 Pulse lock...................................................................................................... 50
12 Function block "Boiler" .................................................................................. 51
12.1 Operating lines..............................................................................................51
12.2 Operating mode.............................................................................................51
12.3 Limitations.....................................................................................................51
12.3.1 Maximum limitation of the boiler temperature ...............................................51
12.3.2 Minimum limitation of the boiler temperature ................................................52
12.3.3 Actions during d.h.w. heating........................................................................52
12.4 2-position control........................................................................................... 52
12.4.1 Control with a single-stage burner ................................................................52
12.4.2 Control with a 2-stage burner........................................................................ 53
12.4.3 Frost protection for the boiler ........................................................................ 54
12.4.4 Protective boiler startup ................................................................................55
12.4.5 Protection against boiler overtemperatures................................................... 55
12.5 Operating mode of pump M1.........................................................................56
13 Function block "Setpoint of return temperature limitation" ............................57
13.1 Operating line................................................................................................ 57
13.2 Description .................................................................................................... 57
13.3 Minimum limitation of the return temperature................................................57
13.3.1 Acquisition of measured values ....................................................................57
13.3.2 Mode of operation ......................................................................................... 57
13.3.3 Mode of operation with a single device (with no bus) ...................................58
13.3.4 Mode of operation in interconnected plants .................................................. 58
14 Function block "District heat"......................................................................... 59
14.1 Operating lines..............................................................................................59
14.2 Limitations.....................................................................................................59
14.2.1 Maximum limitation of the primary return temperature..................................59
6/118
Siemens Building Technologies Basic Documentation RV L471 CE1P2524E
HVAC Products Contents 23.10.2002
14.2.2 Maximum limitation of return temperature differential (DRT limitation)..........60
14.2.3 Integral action time.........................................................................................61
14.2.4 Minimum stroke limitation (suppression of hydraulic creep) ..........................61
14.2.5 Limitation of the volumetric flow.....................................................................61
15 Function block "Maximum limitation of the return temperature, d.h.w.".........62
15.1 Operating line.................................................................................................62
15.2 Purpose..........................................................................................................62
15.3 Function.........................................................................................................62
16 Function block "Basic settings d.h.w." ...........................................................64
16.1 Operating lines...............................................................................................64
16.2 Assignment of d.h.w. heating.........................................................................64
16.3 Program for the circulating pump...................................................................64
16.3.1 General mode of operation............................................................................64
16.3.2 Operation of circulating pump during the holiday period...............................65
16.4 Frost protection for d.h.w...............................................................................66
16.4.1 Frost protection in the d.h.w. storage tank.....................................................66
16.4.2 Frost protection in the d.h.w. storage tank flow .............................................66
16.4.3 Frost protection for the secondary d.h.w. flow...............................................66
17 Function block "Release of d.h.w. heating"....................................................67
17.1 Operating line.................................................................................................67
17.2 Release..........................................................................................................67
17.2.1 Function.........................................................................................................67
17.2.2 Release programs..........................................................................................67
17.2.3 D.h.w heating during the holiday period.........................................................68
18 Function block "D.h.w. priority and flow temperature setpoint"......................69
18.1 Operating line.................................................................................................69
18.2 Settings..........................................................................................................69
18.3 D.h.w. priority.................................................................................................69
18.3.1 Absolute priority.............................................................................................69
18.3.2 Shifting priority...............................................................................................70
18.3.3 No priority.......................................................................................................70
18.4 Flow temperature setpoint .............................................................................70
18.4.1 Maximum selection........................................................................................70
18.4.2 D.h.w..............................................................................................................71
19 Function block "D.h.w. storage tank".............................................................72
19.1 Operating lines...............................................................................................72
19.2 D.h.w. charging..............................................................................................72
19.2.1 D.h.w. charging with hot water.......................................................................72
19.2.2 Alternate d.h.w. charging with hot water and electricity.................................72
7/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products Contents 23.10.2002
19.3 D.h.w. temperature and d.h.w. switching differential.....................................73
19.4 Boost of the d.h.w. charging temperature ..................................................... 74
19.5 Maximum d.h.w. charging time......................................................................74
19.6 Setpoint of legionella function .......................................................................74
19.7 Forced charging ............................................................................................ 75
19.8 Protection against discharging......................................................................75
19.8.1 Purpose......................................................................................................... 75
19.8.2 Mode of operation ......................................................................................... 75
19.9 Manual d.h.w. charging.................................................................................76
20 Function block "3-position actuator for d.h.w.".............................................. 77
20.1 Operating lines..............................................................................................77
20.2 Function ........................................................................................................77
20.2.1 Flow temperature boost.................................................................................77
20.2.2 D.h.w temperature control............................................................................. 77
20.3 Pulse lock...................................................................................................... 77
21 Function block "Derivative action time d.h.w. heating via heat exchanger" .. 78
21.1 Operating line................................................................................................ 78
21.2 Description .................................................................................................... 78
22 Function block "Multi-functional relay"........................................................... 79
22.1 Operating lines..............................................................................................79
22.2 Functions....................................................................................................... 79
22.2.1 No function....................................................................................................79
22.2.2 Outside temperature switch ..........................................................................79
22.2.3 ON / OFF according to the time switch .........................................................80
22.2.4 Relay energized in the event of fault............................................................. 80
22.2.5 Relay energized during occupancy time ....................................................... 80
22.2.6 Relay energized during occupancy time (including optimizations)................80
22.2.7 Relay energized, if there is demand for heat ................................................80
22.2.8 Manually ON / OFF ....................................................................................... 80
23 Function block "Legionella function" .............................................................81
23.1 Operating lines..............................................................................................81
23.1.1 Periodicity of legionella function.................................................................... 81
23.1.2 Time of legionella function ............................................................................81
23.1.3 Dwelling time at the legionella setpoint.........................................................81
23.1.4 Circulating pump operation during the legionella function ............................81
23.2 Mode of operation ......................................................................................... 81
24 Function block "Switching program 3"...........................................................83
24.1 Operating lines..............................................................................................83
24.2 Function ........................................................................................................83
8/118
Siemens Building Technologies Basic Documentation RV L471 CE1P2524E
HVAC Products Contents 23.10.2002
25 Function block "Service functions and general settings" ...............................84
25.1 Operating lines...............................................................................................84
25.2 Display functions............................................................................................84
25.2.1 Flow temperature setpoint .............................................................................84
25.2.2 Heating curve.................................................................................................85
25.2.3 Hours run counter..........................................................................................85
25.2.4 Software version............................................................................................85
25.2.5 Identification number of room unit..................................................................86
25.2.6 Radio clock, elapsed time since last reception..............................................86
25.3 Commissioning aids.......................................................................................86
25.3.1 Simulation of the outside temperature...........................................................86
25.3.2 Relay test.......................................................................................................87
25.3.3 Sensor test.....................................................................................................87
25.3.4 Test of H-contacts..........................................................................................88
25.4 Auxiliary functions..........................................................................................88
25.4.1 Frost protection for the plant..........................................................................88
25.4.2 Flow alarm .....................................................................................................89
25.4.3 Manual overriding of operating mode (contact H1)........................................90
25.4.4 Pump overrun ................................................................................................90
25.4.5 Pump kick ......................................................................................................90
25.4.6 Winter- / summertime changeover.................................................................90
25.4.7 Gain of locking signal.....................................................................................91
25.5 Entries for LPB...............................................................................................92
25.5.1 Source of time of day.....................................................................................92
25.5.2 Outside temperature source ..........................................................................92
25.5.3 Addressing the devices..................................................................................93
25.5.4 Bus power supply...........................................................................................93
25.5.5 Bus loading number.......................................................................................94
25.6 Heat demand output DC 0...10 V...................................................................94
26 Function block "Locking functions" ................................................................95
26.1 Operating line.................................................................................................95
26.2 Locking the settings on the software side......................................................95
26.3 Locking the settings for district heat on the hardware side............................95
27 Communication..............................................................................................96
27.1 Combination with room units..........................................................................96
27.1.1 General..........................................................................................................96
27.1.2 Combination with room unit QAW50..............................................................96
27.1.3 Combination with room unit QAW70..............................................................96
27.1.4 Combination with SYNERGYR central unit OZW30......................................98
27.2 Communication with other devices................................................................98
27.2.1 Data bus.........................................................................................................98
9/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products Contents 23.10.2002
27.2.2 Heat demand signal ...................................................................................... 99
28 Handling......................................................................................................100
28.1 Operation.....................................................................................................100
28.1.1 General........................................................................................................100
28.1.2 Analog operating elements .........................................................................101
28.1.3 Digital operating elements........................................................................... 102
28.1.4 Setting levels and access rights.................................................................. 103
28.2 Commissioning............................................................................................ 103
28.2.1 Installation instructions................................................................................ 103
28.2.2 Operating lines............................................................................................103
28.3 Installation...................................................................................................104
28.3.1 Mounting location........................................................................................104
28.3.2 Mounting choices ........................................................................................ 104
28.3.3 Electrical installation.................................................................................... 104
29 Engineering.................................................................................................105
29.1 Connection terminals ..................................................................................105
29.1.1 Low-voltage side ......................................................................................... 105
29.1.2 Mains voltage side ......................................................................................105
29.2 Connection diagrams .................................................................................. 106
29.2.1 Low-voltage side ......................................................................................... 106
29.2.2 Mains voltage side ......................................................................................106
30 Mechanical design ......................................................................................107
30.1 Basic design................................................................................................ 107
30.2 Dimensions .................................................................................................107
31 Technical data............................................................................................. 108
10/118
Siemens Building Technologies Basic Documentation RV L471 CE1P2524E
HVAC Products Contents 23.10.2002
1 Summary
1.1 Brief description and key features
• The RVL471 is a multifunctional heating controller for use in residential and non-residential buildings that have their own d.h.w. heating facility
• Suited for:
− Heating zone control with or without room influence via weather-compensated flow
temperature control
− Precontrol via demand-compensated control of the main / secondary flow tem-
perature
− Precontrol via demand-compensated boiler temperature control. Suited for integra-
tion into heat source cascades or heat generation systems (heat pump, solar,
wood)
• For use in plants with own heat generation or with a district heat connection
• With regard to d.h.w. heating, the RVL471 is suited for plants with d.h.w. storage tanks,
electric immersion heaters and instantaneous systems with own heat exchangers
• The RVL471 has 29 plant types preprogrammed. When a certain type of plant is selected, all functions and settings required for that plant will be activated
• A scalable voltage output DC 0...10 V is used to pass the heat demand signal to other
systems
• A multifunctional relay provides additional control functions, if required
• For direct adjustment of the heating curve, the well known “bar" is used. Digital ad-
justment of the heating curve is possible also. A setting knob is used for making room
temperature readjustments
• All the other parameters are set digitally based on the operating line principle
• The RVL471 is capable of communicating with other units via LPB (Local Process Bus)
• Key design features: Operating voltage AC 230 V, CE conformity, overall dimensions
to DIN 43700 (144 x 144 mm)
1.2 Type summary
The RVL471 is a compact controller that requires no plug-in modules.
1.3 Equipment combinations
1.3.1 Suitable sensors
• For water temperatures:
Suitable are all types of temperature sensors that use a sensing element
LG-Ni 1000
− Strap-on temperature sensor QAD22
− Immersion temperature sensors QAE22...
− Immersion temperature sensor QAP21.3 complete with connecting cable
• For the room temperature:
Suitable are all types of temperature sensors that use a sensing element
LG-Ni
− Room temperature sensor QAA24
• For the outside temperature:
− 2XWVLGHVHQVRU4$&VHQVLQJHOHPHQW/*1L
− Outside sensor QAC32 (sensing element NTC 575)
7KHIROORZLQJW\SHVDUHSUHVHQWO\DYDLODEOH
7KHIROORZLQJW\SHVDUHSUHVHQWO\DYDLODEOH
11/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 1 Summary 23.10.2002
1.3.2 Suitable room units
• Room unit QAW50
• Room unit QAW70
1.3.3 Suitable actuators
All types of actuators from HVAC Products with the following features can be used:
• Electromotoric or electrohydraulic actuators with a running time of 0.5...14.5 minutes
• 3-position control
• Operating voltage AC 24... 230 V
1.3.4 Communication
Communication is possible with the following units:
• All LPB-compatible controllers supplied by HVAC Products
• SYNERGYR central unit OZW30 (software version 3.0 or higher)
1.3.5 Passing on of heat demand signal
The scalable DC 0...10 V signal can be used to pass the heat demand signal to other
devices in the system.
1.3.6 Documentation
Type of documentation Ordering number (for English)
Data Sheet RVL471 CE1N2524E
Operating Instructions RVL471 4 319 2779 0
Installation Instructions RVL471 4 319 2770 0
Data Sheet QAW50 CE2N1635E
Data Sheet QAW70 CE2N1637E
Data Sheet "LPB Basic System Data" CE1N2030E
Data Sheet "LPB Basic Engineering
Data"
CE1N2032E
12/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 1 Summary 23.10.2002
2 Use
2.1 Types of plant
The RVL471 is suitable for all types of heating plant that use weather-compensated
flow temperature control. In addition, it can be used for demand-compensated control of
the main flow.
With regard to d.h.w. heating, the RVL471 is suited for plants with storage tanks or
d.h.w. heating via heat exchangers (instantaneous d.h.w. heating).
Main applications:
• Heating zones and d.h.w. heating with own heat generation
• Heating zones and d.h.w. heating with a district heat connection
• Interconnected plants consisting of heat generation, several heating zones and central
or decentral d.h.w. heating
2.2 Types of houses and buildings
Basically, the RVL471 is suited for use in all types of houses and buildings It has been
designed especially for:
• Multi-family houses
• Single-family homes
• Small to medium-size nonresidential buildings
2.3 Types of heating systems
The RVL471 is suited for use with all standard heating systems, such as:
• Radiators
• Convectors
• Underfloor heating systems
• Ceiling heating systems
• Radiant panels
2.4 Functions
The RVL471 is used if one or several of the following functions is / are required:
• Weather-compensated flow temperature control
• Flow temperature control via a modulating seat or slipper valve, or boiler temper a t ur e
control through direct control of a single- or 2-stage burner
• D.h.w. storage tank charging through control of a mixing valve, charging pump or diverting valve, with or without circulating pump
• D.h.w. heating via heat exchanger (instantaneous d.h.w. heating), with or without circulating pump
• Optimum start / stop control according to the selected 7-day program
• Quick setback and boost heating according to the selected 7-day program
• ECO function: demand-dependent switching of the heating system based on the type
of building construction and the outside temperature
• Voltage output DC 0...10 V for passing on the heat demand signal
• Multifunctional relay
• 7-day program for building occupancy with a maximum of 3 setback periods per day
and daily varying occupancy schedules
• Own 7-day switching program for the release of d.h.w. heating
13/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 2 Use 23.10.2002
• Third 7-day switching program
• Input of 8 holiday periods per year
• Automatic summer- / wintertime changeover
• Display of parameters, actual values, operating state and error messages
• Communication with other units via LPB
• Remote operation via room unit and external switches
• Service functions
• Frost protection for the plant, the boiler and the house or building
• Minimum or maximum limitation of the return temperature
• DRT limitation
• Minimum and maximum limitation of the flow temperature
• Maximum limitation of the room temperature
• Periodic pump run
• Pump overrun
• Maximum limitation of the rate of setpoint increase
• Flow alarm
• Legionella function
• Manual d.h.w. charging
For the preprogrammed heating and d.h.w. heating circuits and their possible combinations, refer to section 3.2 ”Plant types”.
14/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 2 Use 23.10.2002
3 Fundamentals
3.1 Key technical features
The RVL471 offers 2 key technical features:
• The RVL471 has 6 heating circuit plant types and 5 d.h.w. plant types preprogrammed.
When making use of all possible or practical combinations, there is a total of 29 plant
types available
• All functions and their settings are combined in the form of function blocks
3.1.1 Plant types with regard to heating circuit
In terms of heating circuit, the following plant types are available:
• Heating circuit plant type 1 – space heating with mixing valve
• Heating circuit plant type 2 – space heating with boiler
• Heating circuit plant type 3 – space heating with district heat
• Heating circuit plant type 4 – precontrol with mixing valve
• Heating circuit plant type 5 – precontrol with boiler
• Heating circuit plant type 6 – precontrol with district heat
Heating circuit plant type 5 is suited for integration into heat source cascades or heat
generation systems.
3.1.2 Plant types with regard to d.h.w. heating
In terms of d.h.w., the following plant types are available:
• D.h.w. plant type 0 – no d.h.w.
• D.h.w. plant type 1 – storage tank with charging pump
• D.h.w. plant type 2 – storage tank with mixing valve
• D.h.w. plant type 3 – storage tank with diverting valve
• D.h.w. plant type 4 – instantaneous d.h.w. heating via heat exchanger
• D.h.w. plant type 5 – only electric immersion heater
3.1.3 Function blocks
The following function blocks are available:
• Function block “Enduser space heating”
• Function block “Enduser d.h.w.”
• Function block “Enduser general”
• Function block “Plant type”
• Function block “Cascade slave”
• Function block "Space heating"
• Function block “3-position actuator heating circuit”
• Function block “Boiler”
• Function block “Setpoint return temperature limitation”
• Function block “District heat”
• Function block "Maximum limitation of the return temperature d.h.w."
• Function block "Basic settings d.h.w."
• Function block "Release of d.h.w. heating"
• Function block "Priority and flow temperature setpoint d.h.w."
• Function block "D.h.w. storage tank"
• Function block "3-position actuator d.h.w."
• Function block “Derivative action time d.h.w. heating via heat exchanger”
15/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
• Function block “Multifunctional relay”
• Function block “Legionella function"
• Function block "Switching program 3"
• Function block “Service functions and general settings”
• Function block “Locking functions”
For each function block, the required settings are available in the form of operating
lines. On the following pages, a description of the individual functions per block and line
is given.
3.2 Plant types
The RVL471 has 29 plant types preprogrammed; the functions required for each type of
plant are ready assigned. When commissioning the installation, the relevant plant type
must be selected.
Each plant type consists of a heating circuit and a d.h.w. circuit. When making use of all
possible or practical combinations, there is a total of 29 plant types available.
3.2.1 Selectable combinations
&RPELQDWLRQV Type of heating circuit Type of d.h.w. heating
1–0
1–1
1–2
1–4
1–5
2–0
2–1
2–2
2–3
2–5
3–0
3–1
3–2
3–3
3–4
3–5
4–0
4–1
4–2
4–5
5–0
5–1
5–2
5–4
5–5
6–0
6–1
6–2
6–5
Space heating with mixing valve No d.h.w.
Space heating with mixing valve Storage tank with charging pump
Space heating with mixing valve Storage tank with mixing valve
Space heating with mixing valve Instantaneous d.h.w. heating via heat
exchanger
Space heating with mixing valve Only electric immersion heater
Space heating with boiler No d.h.w.
Space heating with boiler Storage tank with charging pump
Space heating with boiler Storage tank with mixing valve
Space heating with boiler Storage tank with diverting valve
Space heating with boiler Only electric immersion heater
Space heating with district heat No d.h.w.
Space heating with district heat storage tank with charging pump
Space heating with district heat Storage tank with mixing valve
Space heating with district heat Storage tank with diverting valve
Space heating with district heat Instantaneous d.h.w. heating via heat
exchanger
Space heating with district heat Only electric immersion heater
Precontrol with mixing valve No d.h.w.
Precontrol with mixing valve Storage tank with charging pump
Precontrol with mixing valve Storage tank with mixing valve
Precontrol with mixing valve Only electric immersion heater
Precontrol with boiler No d.h.w.
Precontrol with boiler Storage tank with charging pump
Precontrol with boiler Storage tank with mixing valve
Precontrol with boiler Instantaneous d.h.w. heating via heat
exchanger
Precontrol with boiler Only electric immersion heater
Precontrol with district heat No d.h.w.
Precontrol with district heat Storage tank with charging pump
Precontrol with district heat Storage tank with mixing valve
Precontrol with district heat Only electric immersion heater
16/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
Notes on the plant diagrams with the different types of space heating and d.h.w. circuits
are given in the following sections:
• Symbols
and indicate where and how the space heating circuit is connected to
the d.h.w. circuit. where:
representing the flow
representing the return
• The numbers beneath these symbols indicate the type of d.h.w. circuit with which the
heating circuit can be combined
3.2.2 Heating circuit type 1 – space heating with mixing
valve
A6/B5
B7
2524S01
1, 2, 4 0, 5
Space heating with weather-compensated flow temperature control. 3-position control
acting on the mixing valve of the heating zone.
Outside temperature signal from own sensor or data bus. With or without room influence. Heating up and setback according to the heating program.
3.2.3 Heating circuit type 2 – space heating with boiler
A6/B5
2524S02
1, 2 3 0, 5
Space heating with own boiler, with weather-compensated boiler temperature control.
2-position control acting on the burner.
Outside temperature signal from own sensor or data bus. With or without room influence. Heating up and setback according to the heating program.
17/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.2.4 Heating circuit type 3 – space heating with district heat
N1
A6/B5
Y1
B7
B71
2524S03
2, 4 1 3 0, 5
Space heating with district heat connection, with weather-compensated flow temperature control acting on the valve in the primary return of the district heat connection.
Outside temperature signal from own sensor or data bus. With or without room influence. Heating up and setback according to the heating program.
3.2.5 Heating circuit type 4 – precontrol with mixing valve
B7
2524S04
1, 2 0, 5
Precontrol with demand-dependent control of the main flow temperature. 3-position
control acting on the mixing valve in the main flow.
Heat demand signal from data bus. No heating program.
3.2.6 Heating circuit type 5 – precontrol with boiler
B7
1, 2, 4 0, 5
Precontrol with demand-compensated control of the boiler temperature. 2-position control acting on the burner.
Heat demand signal from data bus. No heating program.
2524S05
18/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.2.7 Heating circuit type 6 – precontrol with district heat
N1
Y1
2524S06
B7
Precontrol with district heat connection, with demand-compensated control of the secondary flow temperature acting on the valve in the primary return.
Heat demand signal from data bus. No heating program.
B71
1, 2 0, 5
3.2.8 D.h.w. plant type 0 – no d.h.w.
The RVL471 does not provide d.h.w. heating.
3.2.9 D.h.w. plant type 1 – d.h.w. storage tank with charging
pump
M3
B31
M4
K6
B32
Charging of d.h.w. storage tank through control of the charging pump. Acquisition of the
d.h.w. temperature with one or 2 sensors or thermostats. Circulating pump and electric
immersion heater are optional.
2524S07
3.2.10 D.h.w. plant type 2 – d.h.w. storage tank with mixing
valve
Y7
M3
B3
K6
B31
M4
B32
Charging of d.h.w. storage tank through control of the mixing valve according to own
temperature sensor in the storage tank flow. Acquisition of the d.h.w. temperature with
one or 2 sensors or thermostats. Circulating pump and electric immersion heater are
optional.
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
2524S08
19/118
3.2.11 D.h.w. plant type 3 – storage tank with diverting valve
Y3
B31
M4
K6
B32
2524S09
Charging of the d.h.w. storage tank through control of the diverting valve. Acquisition of
the d.h.w. temperature with one or 2 sensors or thermostats. Circulating pump and
electric immersion heater are optional.
3.2.12 D.h.w. plant type 4 – instantaneous d.h.w. heating via
heat exchanger
N1
B3
Y7
D.h.w. heating via heat exchanger (instantaneous d.h.w. heating) through control of the
2-port valve in the heat exchanger’s primary return. Acquisition of the d.h.w. temperature in the heat exchanger’s secondary flow. Circulating pump is optional, but strongly
recommended.
M4
2524S10
3.2.13 D.h.w. plant type 5 – only electric immersion heater
M4
K6
2524S11
Charging of d.h.w. storage tank only through release of the electric immersion heater.
No control of d.h.w. heating by the controller. Circulating pump is optional.
A6 Room unit QAW50 or QAW70 E2 Consumer (space)
B1 Flow / boiler sensor LPB Data bus
B3 D.h.w. flow sensor K6 Electric immersion heater
B31 Storage tank sensor / thermostat 1 M1 Heating circuit pump / circulating pump
B32 Storage tank sensor / thermostat 2 M3 Charging pump
B5 Room sensor M4 Circulating pump
B7 Return sensor (primary circuit) N1 Controller RVL471
B71 Return sensor (secondary circuit) Y1 Heating circuit mixing valve
B9 Outside sensor Y3 Diverting valve
E1 Heat source (boiler / heat converter) Y7 D.h.w. mixing valve
20/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.2.14 Summary of plant types and plant combinations
0, 5
0, 5
0, 5
0, 5
Plant types with regard to heating circuit D.h.w. plant types
1
Space heating with
mixing zone 3position control,
acting on mixing
valve
Space heating with
own boiler:
2
Space heating with
own boiler 2-position
contro l, acting on
burner
Possible d.h.w. combinations:
3
Space heating with
district heat
3-position control,
acting on valve
Possible d.h.w. combinations:
A6/B5
B7
2524S01
Õ 1, 2, 4
A6/B5
2524S02
Õ 1, 2 3 0, 5
N1
Y1
B7
B71
2, 4 1 3 0, 5
A6/B5
2524S03
--
--
--
0
No d.h.w. heating
1
D.h.w. heating
M3
B31
M4
K6
B32
2524S07
through control
of the charging
pump.
2
M4
2524S08
D.h.w. heating
through control
of the mixing
valve.
Y7
B3
M3
K6
B31
B32
4
Precontrol with mixing zone, heat demand signal via data
bus
Possible d.h.w. combinations:
5
Precontrol with
boiler, heat demand
signal v ia data bus
Possible d.h.w. combinations:
6
Precontrol with district heat, heat demand signal via data
bus
Possible d.h.w. combinations:
B7
Õ 1, 2
B7
Õ 1, 2, 4
N1
Y1
B7
B71
Õ 1, 2
--
Y3
B31
2524S04
K6
B32
M4
--
B3
2524S05
Y7
M4
--
M4
2524S06
K6
2524S11
3
D.h.w. heating
through control
of the diverting
valve
2524S09
4
D.h.w. heating
via heat exchanger
through control
of the valve
2524S10
5
D.h.w. heating
via electric
immersion
heater only
21/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.3 Setting levels, function blocks and plant
types
Combination of plants
2524T01e
1-0 1-1 1-2 1-4 1-5 2-0 2-1 2-2 2-3 2-5 3-0 3-1 3-2 3-3 3-4 3-5 4-0 4-1 4-2 4-5 5-0 5-1 5-2 5-4 5-5 6-0 6-1 6-2 6-5
Enduser general
Plant type
Function block
Enduser space heating
Enduser d.h.w.
Level
Enduser
Cascad e s l ave
Space heating
Setpoint limitation of return temperatu re
District heating
3-positio n actu ato r heati ng ci rc uit
Boiler
Max. limitat i on of d.h . w. re turn te mperature
Basic settings d.h.w.
Release of d.h.w. charging
D.h.w. s to rage tank
D.h.w. priority and flow temperature setpoint
3-position d.h.w. actuator
Heating
engineer
The above table shows
• the assignment of function blocks t o t he 3 op erat ing leve ls
• the function blocks activ at ed wit h the d ifferen t p lan t ty pes
U
H
J
Q
D
K
F
[
H
W
D
H
K
D
L
Y
J
Q
L
W
D
H
K
Z
K
G
H
P
L
W
Q
R
L
W
F
D
H
Y
L
W
D
Y
L
U
H
Multifunctional relay
Time switch pro gram 3
Legionella function
'
Service fu nct io ns and gene ra l set tin gs
Locking function s
O
H
Y
H
O
J
Q
L
N
F
R
/
22/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.4 Heating circuit ope rating modes
The heating circuit operating mode is selected on the controller by pressing the respective button. Also, the operating mode can be changed by bridging terminals H1-M.
3.4.1 Automatic operation
• Automatic changeover from NORMAL to REDUCED temperature, and vice versa,
according to the 7-day program entered
• Automatic changeover to holiday mode, and back, according to the holiday schedule
entered
• Demand-dependent switching of the heating system according to the room and outside
temperature while giving consideration to the building’s thermal inertia (ECO function)
• Remote operation via room unit (optional)
• Frost protection is ensured
3.4.2 Continuously REDUCED heating
• Continuous heating to the REDUCED temperature
• With ECO function
• No holiday mode
• Remote operation from a room unit not possible
• Frost protection is ensured
3.4.3 Continuously NORMAL heating
• Continuous heating to NORMAL temperature
• No ECO function
• No holiday mode
• Remote operation via room unit not possible
• Frost protection is ensured
3.4.4 STANDBY
• Heating is switched off, but is ready to operate
• Frost protection is ensured
3.5 D.h.w. operati ng modes
D.h.w. heating is switched on and off by pressing the respective button:
• ON (button
operating mode and control. D.h.w. heating to the NORMAL or REDUCED setpoint
can be provided as follows:
− According to the entered switching program 2
− According to the entered heating circuit program (–1 h)
− Continuously (24 hours a day)
During the entered holiday period, d.h.w. heating and the circulating pump are deactivated when using controllers with no bus connection (with data bus, depending on
the setting made).
• OFF (button
tion of plant types x–4 and x–5)
is lit): D.h.w. heating takes place independent of the heating circuit’s
dark): No d.h.w. heating. Frost protection is ensured (with the excep-
23/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.6 Manual operation
The RVL471 can be switched to manual operation. In this case, the control will be
switched off. In manual operation, the various actuating devices behave as follows:
• Heating circuit mixing valve: This mixing valve is not under voltage, but can be manually driven to any position by pressing the manual buttons
= opening). The heating circuit pump / circulating pump is continuously running.
• Boiler: The 2 burner stages are continuously on. The manual button
switch the second stage on and off. Pump M1 is continuously running
• D.h.w. charging pump: The charging pump is continuously running
• D.h.w. changeover valve: The diverting valve is always in the ”Heating circuit” position
• D.h.w. slipper / seat valve: This valve is driven to the fully closed position, in which
case the closing time is five times the set running time. Then, it is deactivated
• Circulating pump M4: Continuously running
• Electric immersion heater K6: Continuously released
• Multifunctional relay: Continuously energized
Manual operation also negates any overriding of the controller's operating mode
(bridging of H1–M).
( = closing,
can be used to
3.7 Plant type and operating mode
Depending on the selected type of plant, the following operating modes are available:
Plant type
1–0 YES YES YES YES NO YES
1–1, 1–2, 1–4, 1–5 YES YES YES YES YES YES
2–0 YES YES YES YES NO YES
2–1, 2–2, 2–3, 2–5 YES YES YES YES YES YES
3–0 YES YES YES YES NO YES
3–1, 3–2, 3–3, 3–4, 3–5 YES YES YES YES YES YES
4–0 YES NO NO NO NO YES
4–1, 4–2, 4–5 YES NO NO NO YES YES
5–0 YES NO NO *) NO YES
5–1, 5–2, 5–4, 5–5 YES NO NO *) YES YES
6–0 YES NO NO NO NO YES
6–1, 6–2, 6–5 YES NO NO NO YES YES
*)
Depending on the boiler's operating mode:
Boiler with automatic shutdown: NO
Boiler with manual shutdown: YES
24/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
3.8 Operating state and operational level
The user selects the required heating circuit operating mode by pressing the respective
button. Each operating state has a maximum of 2 operating states – with the exception
of operating mode "Continuously NORMAL heating" (only one operating state possible).
When the ECO function is active, and in the case of quick setback, the operating state
is always OFF.
When the operating state is ON, there is a maximum of 3 operational levels, depending
on the operating mode. The operational level is determined by the heating program and
the holiday program.
Operat i n g mo de
OFF
ON
OFF
ON
OFF ON
ON
Operating stat e
Operational le v e l
2522B03e
25/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 3 Fundamentals 23.10.2002
4 Acquisition of measured values
4.1 Room temperature (A6, B5)
4.1.1 Measurement
The following choices exist:
• A room temperature sensor QAA24 can be connected to terminal B5
• A room unit QAW50 or QAW70 can be connected to terminal A6
• 2 units can be connected to the terminals. In this case, the RVL471 can ascertain the
average of the 2 measurements. The other room unit functions will not be affected by
averaging
4.1.2 Handling faults
If there is a short-circuit or open-circuit in one of the 2 measuring circuits, the control
responds as follows, depending on the room temperature source (setting on operating
line 65):
• No sensor (operating line 65 = 0):
A short-circuit or open-circuit has no impact on the control. An error message will not
be generated
• Room unit sensor QAW... (operating line 65 = 1):
In the event of a short-circuit or open-circuit, the control continues to operate with the
room model, depending on the function. An error message will be generated
• Room temperature sensor QAA24 (operating line 65 = 2):
In the event of a short-circuit or open-circuit, the control continues to operate with the
room model, depending on the function. An error message will be generated
• Average value (operating line 65 = 3):
In the event of a short-circuit or open-circuit in one of the 2 measuring circuits, the
control continues to operate with the normally working measuring circuit. An error
message will be generated.
In the case of a short-circuit or open-circuit in both measuring circuits, the control continues to operate with the room model, depending on the function. 2 error messages
will be generated
• Automatic mode (operating line 65 = A):
Since the controller itself decides how it acquires the room temperature, error messages cannot be generated.
4.1.3 Room model
The RVL471 features a room model. It simulates the progression of the room temperature. In plants with no measurement of the room temperature, it can provide certain
room functions (e.g. quick setback).
For more detailed information, refer to section 10.4.4, "Room model temperature".
4.2 Flow and boiler temperatur e (B1)
4.2.1 Measurement
The flow or boiler temperature is acquired with one or 2 sensors. 2 sensors connected
in parallel are used to ascertain the average value. The temperature sensors used must
always have a sensing element LG-Ni
26/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 4 Acquisition of measured values 23.10.2002
4.2.2 Handling faults
A short-circuit or open-circuit in the measuring circuit is identified and indicated as a
fault. In that case, the plant responds as follows:
• Plants with 3-position control:
Heating circuit pump / circulating pump M1 continues to run and the mixing valve will
close
• Plants with 2-position control:
The heating circuit pump / circulating pump M1 continues to run and the burner will
shut down
4.3 Outside temperature (B9)
4.3.1 Measurement
The outside temperature is acquired with the outside sensor. This can be a QAC22 or
QAC32:
• QAC22: Sensing element LG-Ni 1000
• QAC32: Sensing element NTC 575 at 20 °C
The controller automatically identifies the type of sensor used.
In interconnected plants, the outside temperature signal is made available via LPB.
Controllers having their own sensor pass the outside temperature signal to the data
bus.
DW&
4.3.2 Handling faults
If there is a short-circuit or open-circuit in the measuring circuit, the controller responds
as follows, depending on the outside temperature source:
• Controller not connected to the data bus (LPB):
The control operates with a fixed value of 0 °C outside t emperature. An error message
will be generated
• Controller connected to the data bus (LPB):
If the outside temperature is available via data bus, it will be used. An error message
will not be generated (this is the normal state in interconnected plants!). If there is no
outside temperature available on the data bus, however, the control uses a fixed value
of 0 °C outside temperature. In that case, an error message will be generated.
4.4 Primary return temperature (B7)
4.4.1 Measurement
The primary return temperature is acquired with a sensor having a sensing element LGNi 1000
primary return temperature and for limitation of the temperature differential (DRT limitation).
In interconnected plants, the primary return temperature with plant type 1–x can be
acquired via data bus. Controllers with plant type 1–0 and connected sensor pass the
return temperature signal to the data bus.
7KLVPHDVXUHGYDOXHLVUHTXLUHGIRUPLQLPXPDQGPD[LPXPOLPLWDWLRQRIWKH
4.4.2 Handling faults
If there is a short-circuit or open-circuit in the measuring circuit, and if the controller
requires the return temperature, it responds as follows:
27/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 4 Acquisition of measured values 23.10.2002
• If there is a return temperature from a controller of the same segment available on the
data bus, it is used (only with plant type 1–x). No error message will be generated
since this is the normal state in interconnected plants
• However, if there is no return temperature available on the data bus, the return temperature limitation functions will be deactivated and an error message generated
4.5 Secondary return temperature (B71)
4.5.1 Measurement
The secondary return temperature is acquired with a sensor having a sensing element
LG-Ni 1000
6–x), together with the primary return temperature.
7KLVPHDVXUHGYDOXHLVUHTXLUHGIRU'57OLPLWDWLRQSODQWW\SHV±[DQG
4.5.2 Handling faults
If there is a short-circuit or open-circuit in the measuring circuit, and if the controller
requires the return temperature, DRT limitation will be deactivated. An error message
will be generated
4.6 D.h.w. flow temperatu re (B 3)
4.6.1 Measurement
The d.h.w. flow temperature is acquired with a sensor having a sensing element
LG-Ni 1000
4.6.2 Handling faults
If there is a short-circuit or open-circuit in the measuring circuit, the d.h.w. will no longer
be heated. The charging pump is deactivated and the actuating device (slipper or seat
valve) is shut.
An error message will be generated.
4.7 D.h.w. storage tank temperature (B31, B32)
4.7.1 Measurement
The storage tank temperature can be acquired as follows:
• With one or 2 sensors having a sensing element LG-Ni 1000
• With one or 2 thermostats
This means that there are 2 measuring circuits.
RU
4.7.2 Handling faults
The controller's response to faults in the measuring circuits depends on the type of
d.h.w. demand (setting on operating line 126):
• One d.h.w. storage tank temperature sensor (operating line 126 = 0):
In the event of a short-circuit or open-circuit in one of the 2 measuring circuits, the
controller continues to work with the other measuring circuit, if possible. An error message will not be generated.
28/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 4 Acquisition of measured values 23.10.2002
If no valid measured value is obtained from either of the measuring circuits, an error
message will be generated. The d.h.w. will no longer be heated and the charging pump
is deactivated.
Exception: With plant type x–2, the d.h.w. storage tank is always charged when sensor
B3 (d.h.w. flow) works normally
• 2 d.h.w. storage tank temperature sensors (operating line 126 = 1):
In the event of a short-circuit or open-circuit in one of the 2 measuring circuits, the
controller continues to work with the other measuring circuit. An error message will be
generated.
If no valid measured value is obtained from either of the measuring circuits, 2 error
messages will be generated. The d.h.w. will no longer be heated and the charging
pump is deactivated.
Exception: With plant type x–2, the d.h.w. storage tank is always charged when sensor
B3 (d.h.w. flow) works normally
• One d.h.w. storage tank thermostat (operating line 126 = 2):
If, in measuring circuit B31, there is neither an open-circuit (thermostat open) nor a
short-circuit (thermostat closed), an error message will be generated. The d.h.w. will no
longer be heated and the charging pump is deactivated.
Exception: With plant type x–2, the d.h.w. storage tank is always charged when sensor
B3 (d.h.w. flow) works normally
• 2 d.h.w. storage tank thermostats (operating line 126 = 3):
If, in the measuring circuits, there is neither an open-circuit (thermostat open) nor a
short-circuit (thermostat closed), an error message will be generated. The controller
will continue to work with the measuring circuit that operates correctly.
If, in both measuring circuits, there is neither an open-circuit (thermostat open) nor a
short-circuit (thermostat closed), 2 error messages will be generated. The d.h.w. will no
longer be heated and the charging pump is deactivated.
Exception: With plant type x–2, the d.h.w. storage tank is always charged when sensor
B3 (d.h.w. flow) works normally
29/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 4 Acquisition of measured values 23.10.2002
5 Function block "Enduser space heat-
ing"
This function block contains settings that the enduser himself can make.
5.1 Operating lines
Line Function, par amet er Unit Factory
1 Setpoint of NORMAL heating °C 20.0 0...35
2 Setpoint of REDUCED heating °C 14.0 0...35
3 Setpoint of holiday mode / frost protection °C 10.0 0...35
4 Weekday for th e heating program 1-7 1...7, 1-7
5 1. Third heating period, start of NORMAL heating hh:mm 06:00 --:-- / 00:00...24:00
6 1. Third heat i ng per i od, start of REDUCED heating hh:mm 22:00 --:-- / 00:00...24:00
7 2. Third heating period, start of NORMAL heating hh:mm --:-- --:-- / 00:00...24:00
8 2. Third heat i ng per i od, start of REDUCED heating hh:mm --:-- --:-- / 00:00...24 :00
9 3. Third heating period, start of NORMAL heating hh:mm --:-- --:-- / 00:00...24:00
10 3. Third he at i ng per i od, start of REDUCED heating hh:mm --:-- --:-- / 00:00...24 :00
11 Holiday period 1...8
12 Date of first day of holiday dd:MM --:-- --:-- / 01.01. ... 31.12.
13 Date of last day of holiday dd:MM --:-- --:-- / 01.01. ... 31.12.
14 Heat i ng cu rv e, f low tem pe r at ure s et poin t TV 1 at
an outside temperature of 15 °C
15
Heating cu rv e, flo w tem pe rat ur e set po in t TV2 at
an outside temperature of –5 °C
°C 30 20...70
°C 60 20...120
setting
Range
5.2 Setpoints
5.2.1 General
The setpoints of the NORMAL and the REDUCED room temperature and of frost protection for the plant / holiday mode are entered directly in °C room temperature. They
are independent of whether or not the control uses a room temperature sensor.
Caution
5.2.2 Frost protection for the building
The lowest valid room temperature setpoint always corresponds to at least the setpoint
of holiday mode / frost protection (setting on operating line 3), even if lower values have
been entered as the setpoints of the NORMAL and the REDUCED room temperature
(settings on operating lines 1 and 2).
If a room sensor is used and the room temperature falls below the holiday / frost protection setpoint, ECO – if available – will stop OFF until the room temperature has risen
1 °C above the holiday / frost protection setpoint.
5.3 Heating program
The heating program of the RVL471 provides a maximum of 3 heating periods per day;
also, every weekday may have different heating periods.
The entries to be made are not the switching times, but the periods of time during which
the NORMAL room temperature shall apply. Usually, these periods of time are identical
to the building's occupancy times. The actual switching times for the change from the
REDUCED to the NORMAL room temperature, and vice versa, are calculated by the
optimization function. (Precondition: Optimization is activated).
30/118
Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 5 Function block "Enduser space heating" 23.10.2002
Loading...