Heating Circuit and D H W Controller 17588 Hq En

8/9/2019 Heating Circuit and D H W Controller 17588 Hq En

1/94

Edition 1.0

Controller series A

CE1P2474E

15.10.1999

Siemens Building TechnologiesLandis & Staefa Division

RVP300, RVP310, RVP320

Heating Circuit and Domestic Hot Water ControllerBasic Documentation


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Siemens Building Technologies Basic documentation RVP300, 310, 320 CE1P2474E

Landis & Staefa Division 15.10.1999


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Landis & Staefa Division Contents 15.10.1999

Contents

1 Summary ........................................................................................................9

1.1 Brief description and key features...................................................................9

1.2 Type summary................................................................................................9

1.3 Equipment combinations.................................................................................91.3.1 Suitable sensors .............................................................................................9

1.3.2 Suitable room units .........................................................................................9

1.3.3 Suitable actuators .........................................................................................10

1.3.4 Communication.............................................................................................10

1.3.5 Documentation..............................................................................................10

2 Use ...............................................................................................................11

2.1 Types of plant ...............................................................................................11

2.2 Types of houses and buildings......................................................................112.3 Types of heating systems .............................................................................11

2.4 Functions ......................................................................................................11

3 Fundamentals...............................................................................................13

3.1 Key technical features...................................................................................13

3.1.1 Plant types with regard to heating circuit ......................................................13

3.1.2 Plant types with regard to d.h.w. heating ......................................................13

3.1.3 Function blocks.............................................................................................13

3.2 Plant types ....................................................................................................13

3.2.1 Selectable combinations ...............................................................................14

3.2.2 Plant type 10: Space heating with mixing valve, no d.h.w. ..............................14

3.2.3 Plant type 11: Space heating with mixing valve, d.h.w. heating with

charging pump ..............................................................................................14

3.2.4 Plant type 20: Space heating with district heat, no d.h.w. ...........................15

3.2.5 Plant type 30: Space heating with mixing valve and precontrol

with boiler, no d.h.w. .....................................................................................15

3.2.6 Plant type 31: Space heating with mixing valve and precontrol

with boiler, d.h.w. heating with charging pump ...............................................16

3.3 Setting levels, function blocks and plant types .................................................16

3.4 Heating circuit operating modes....................................................................17

3.4.1 Automatic operation ......................................................................................17

3.4.2 Continuously REDUCED heating..................................................................17

3.4.3 Continuously NORMAL heating ....................................................................17

3.4.4 Standby.........................................................................................................17

3.5 D.h.w. operating modes................................................................................17

3.6 Manual operation ..........................................................................................18

3.7 Plant type and operating mode .....................................................................18

3.8 Operational status and operational level.......................................................18


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4 Acquisition of measured value ..................................................................... 19

4.1 Room temperature (A6, B5).......................................................................... 19

4.1.1 Measurement ............................................................................................... 19

4.1.2 Handling of faults.......................................................................................... 19

4.1.3 Room model................................................................................................. 19

4.2 Flow temperature (B1).................................................................................. 19

4.2.1 Measurement ............................................................................................... 19


4.3 Outside temperature (B9)............................................................................. 20

4.3.1 Measurement ............................................................................................... 20


4.4 Return temperature (B7) .............................................................................. 20

4.4.1 Measurement ............................................................................................... 20


4.5 D.h.w. storage tank temperature (B31) ........................................................ 21

4.5.1 Measurement ............................................................................................... 21


5 Function block "Enduser space heating" ...................................................... 22

5.1 Operating lines ............................................................................................. 22

5.2 Setpoints ...................................................................................................... 22

5.2.1 General ........................................................................................................ 22

5.2.2 Frost protection for the building.................................................................... 22

5.3 Heating program........................................................................................... 22

5.4 Holiday program........................................................................................... 23

5.5 Heating curve............................................................................................... 23

6 Function block "Enduser d.h.w."................................................................... 24

6.1 Operating line............................................................................................... 24

6.2 Setpoint ........................................................................................................ 24

7 Function block "Enduser general" ................................................................ 25

7.1 Operating lines ............................................................................................. 257.2 Switching program 2..................................................................................... 25

7.3 Time of day and date.................................................................................... 25

7.4 Indication of faults ........................................................................................ 25

8 Function block "Plant type"........................................................................... 27

8.1 Operating line............................................................................................... 27

8.2 General ........................................................................................................ 27

9 Function block "Space heating".................................................................... 28

9.1 Operating lines ............................................................................................. 28


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9.2 ECO function.................................................................................................28

9.2.1 Compensating variables and auxiliary variables ...........................................28

9.2.2 Heating limits ................................................................................................29

9.3 Mode of operation .........................................................................................29

9.3.1 Switching the heating off...............................................................................29

9.3.2 Switching the heating on...............................................................................30

9.3.3 Operating modes and operational statuses...................................................30

9.4 Optimization..................................................................................................30

9.4.1 Definition and purpose..................................................................................30

9.4.2 Fundamentals...............................................................................................30

9.4.3 Optimization with room sensor......................................................................30

9.4.4 Optimization with room sensor......................................................................31

9.4.5 Process.........................................................................................................31

9.4.6 Room model temperature .............................................................................31

9.4.7 Optimum stop control....................................................................................32

9.4.8 Quick setback ...............................................................................................32

9.4.9 Optimum start control....................................................................................32

9.4.10 Boost heating................................................................................................33

9.5 Room functions .............................................................................................34

9.5.1 Maximum limitation of room temperature......................................................34

9.5.2 Room temperature influence.........................................................................35

9.6 Heating curve................................................................................................35

9.6.1 Purpose ........................................................................................................35

9.6.2 Basic setting..................................................................................................35

9.6.3 Deflection......................................................................................................36

9.6.4 Parallel displacement of heating curve .........................................................37

9.7 Generation of setpoint...................................................................................38

10 Function block Actuator heating circuit".......................................................39

10.1 Operating lines..............................................................................................39

10.2 Limitation ......................................................................................................39

10.2.1 Limitations of flow temperature.....................................................................39

10.2.2 Setpoint rise..................................................................................................39

10.3 Type of actuator............................................................................................40

10.3.1 Two-position control......................................................................................40

10.3.2 Three-position control ...................................................................................40

10.4 Auxiliary variables in interconnected plants ..................................................40

10.4.1 Excess flow temperature mixing valve / heat exchanger...............................40

10.5 Pulse lock with three-position actuator..........................................................41

11 Function block "Boiler"..................................................................................42

11.1 Operating lines..............................................................................................42

11.2 Operating mode ............................................................................................42


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11.3 Limitation...................................................................................................... 42

11.3.1 Maximum limitation of boiler temperature:.................................................... 42

11.3.2 Minimum limitation of boiler temperature:..................................................... 43

11.3.3 Effect during d.h.w. heating.......................................................................... 43

11.4 Two-position control ..................................................................................... 43

11.4.1 Control with a single-stage burner................................................................ 43

11.4.2 Control with a two-stage burner.................................................................... 44

11.4.3 Frost protection for the boiler ....................................................................... 45

11.4.4 Protective boiler startup................................................................................ 45

11.4.5 Protection against boiler overtemperatures.................................................. 46

11.5 Operation mode of pump M1........................................................................ 47

12 Function block "Setpoint of return temperature limitation"............................ 48

12.1 Operating line............................................................................................... 48

12.2 Description ................................................................................................... 48

12.3 Limit value of return temperature.................................................................. 48

12.3.1 Acquisition of measured value ..................................................................... 48

12.3.2 Mode of operation ........................................................................................ 48

12.3.3 Mode of operation with a single unit (with no bus)........................................ 49

12.3.4 Mode of operation in interconnected plants.................................................. 49

13 Function block "District heat"........................................................................ 50

13.1 Operating lines ............................................................................................. 50

13.2 Limitation...................................................................................................... 50

13.2.1 Maximum limitation of primary return temperature ....................................... 50

13.2.2 Integral action time....................................................................................... 51

14 Function block "D.h.w." ................................................................................ 52

14.1 Operating lines ............................................................................................. 52

14.2 Assignment of d.h.w. heating ....................................................................... 52

14.3 Program for d.h.w. circulating pump............................................................. 52

14.4 Frost protection for d.h.w.............................................................................. 52

14.5 Release of d.h.w. heating............................................................................. 52

14.5.1 Function ....................................................................................................... 52

14.5.2 Release programs........................................................................................ 53

14.5.3 D.h.w heating during the holiday period ....................................................... 54

14.6 D.h.w. priority and flow temperature setpoint ............................................... 54

14.6.1 Settings ........................................................................................................ 54

14.6.2 D.h.w. priority ............................................................................................... 54

14.6.3 Absolute priority ........................................................................................... 54

14.6.4 Shifting priority ............................................................................................. 55

14.6.5 No priority..................................................................................................... 55

14.6.6 Flow temperature setpoint............................................................................ 55


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14.6.7 Maximum selection .......................................................................................55

14.6.8 D.h.w.............................................................................................................56

14.7 Type of d.h.w. charging.................................................................................56

14.8 D.h.w. temperature and d.h.w. switching differential.....................................56

14.9 Boost of d.h.w. charging temperature ...........................................................57

14.10 Maximum d.h.w. charging time .....................................................................57

14.11 Legionella function........................................................................................57

14.12 Forced charging............................................................................................58

14.13 Protection against discharging......................................................................58

14.13.1 Purpose ........................................................................................................58

14.13.2 Mode of operation.........................................................................................58

14.14 Manual d.h.w. charging.................................................................................59

15 Function block "Multi-functional relay"...........................................................60

15.1 Operating lines..............................................................................................60

15.2 Functions ......................................................................................................60

15.2.1 No function....................................................................................................60

15.2.2 Relay energized in the event of fault.............................................................60

15.2.3 Relay energized, if there is demand for heat.................................................60

15.2.4 Circulating pump...........................................................................................61

15.2.5 Type of d.h.w. chatging.................................................................................62

16 Function block "Service functions and general settings" ...............................63

16.1 Operating lines..............................................................................................63

16.2 Display functions...........................................................................................63

16.2.1 Hours run counter .........................................................................................63

16.2.2 Software version ...........................................................................................63

16.3 Commissioning aids......................................................................................63

16.3.1 Simulation of outside temperature ................................................................63

16.3.2 Relay test......................................................................................................64

16.3.3 Sensor test....................................................................................................64

16.4 Auxiliary functions.........................................................................................65

16.4.1 Frost protection for the plant .........................................................................6516.4.2 Manual overriding of operating mode (contact H1) .......................................65

16.4.3 Pump overrun ...............................................................................................66

16.4.4 Pump kick .....................................................................................................66

16.4.5 Winter-/summertime changeover..................................................................66

16.4.6 Gain of locking signal....................................................................................66

16.5 Entries for LPB..............................................................................................67

16.5.1 Source of time of day....................................................................................67

16.5.2 Source of outside temperature......................................................................68

16.5.3 Addressing of devices...................................................................................68

16.5.4 Bus power supply..........................................................................................69


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16.5.5 Bus loading number ..................................................................................... 69

17 Function block Locking functions" ................................................................ 70

17.1 Operating line............................................................................................... 70

17.2 Locking the settings...................................................................................... 70

18 Communication ............................................................................................ 71

18.1 Combination with room units ........................................................................ 71

18.1.1 General ........................................................................................................ 71

18.1.2 Combination with room unit QAW50 ............................................................ 71

18.1.3 Combination with room unit QAW70 ............................................................ 71

18.1.4 Combination with central unit OZW30.......................................................... 73

18.2 Communication with other devices............................................................... 73

18.2.1 Data bus....................................................................................................... 73

19 Handling....................................................................................................... 74

19.1 Operation ..................................................................................................... 74

19.1.1 General ........................................................................................................ 74

19.1.2 Analog operating elements........................................................................... 76

19.1.3 Digital operating elements............................................................................ 76

19.1.4 Setting levels and access rights ................................................................... 77

19.2 Commissioning............................................................................................. 78

19.2.1 Installation instructions................................................................................. 78

19.2.2 Operating lines ............................................................................................. 78

19.3 Installation.................................................................................................... 78

19.3.1 Mounting location......................................................................................... 78

19.3.2 Mounting choices ......................................................................................... 78

19.3.3 Electric installation........................................................................................ 79

20 Engineering .................................................................................................. 80

20.1 Connecting terminals.................................................................................... 80

20.2 Connection diagrams ................................................................................... 81

20.2.1 Low voltage side .......................................................................................... 81

20.2.2 Mains voltage side........................................................................................ 81

21 Mechanical design........................................................................................ 83

21.1 Basic design................................................................................................. 83

21.2 Dimensions .................................................................................................. 83

22 Technical data.............................................................................................. 84

22.1 RVP300........................................................................................................ 84

22.2 RVP310........................................................................................................ 84

22.3 RVP320........................................................................................................ 85


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Siemens Building Technologies Basic documentation RVP300, RVP310, RVP320 CE1P2474E

Landis & Staefa Division Summary 15.10.1999

1 Summary

1.1 Brief description and key features

The controllers RVP3... are multi-functional heating controllers for use in residentialand non-residential buildings.

It is suited for weather-compensated flow temperature control of heating zones with

or without room temperature influence and for demand-dependent control of heatgenerating equipment (precontrol, RVP320)

It is used in plants with own heat generating equipment or with a district heat connec-tion (RVP300)

With regard to d.h.w. heating, the types RVP310 and RVP320 are suited for plantswith d.h.w. storage tanks and electric immersion heaters

The controllers RVP300 and RVP320 have 2 types of plants preprogrammed. Whena certain type of plant is selected, all functions and settings required for that particular

plant will be activated

A multi-functional relay provides additional control functions, if required

Heating curve adjustment is digital. A setting knob is used for making room tempera-ture readjustments (L&S-standard).

All the other parameters are set digitally using the operating line principle (L&S- stan-dard)

The RVP3... are capable of communicating with other units via LPB (Local ProcessBus)

Key design features: Operating voltage AC 230 V, CE conformity, overall dimensionsto DIN 43700 (96 x 144 mm)

1.2 Type summary

The RVP3... are compact controllers that require 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 at 0 C. The following type is presently available:

Clamp-on temperature sensor QAD22

Immersion temperature sensors QAE22...

Immersion temperature sensor QAP21.3 complete with connecting cableFor the room temperature:

Suitable are all types of temperature sensors that use a sensing element

LG-Ni 1000 at 0 C. The following type is presently available:

Room temperature sensor QAA24

For the outside temperature: Outside sensor QAC22 (sensing element LG-Ni 1000 at 0 C)

Outside sensor QAC32 (sensing element NTC 575 at 20 C)

1.3.2 Suitable room units

Room unit QAW50

Room unit QAW70


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Landis & Staefa Division Summary 15.10.1999

1.3.3 Suitable actuators

The following actuators from Landis & Staefa can be used:

Three-position actuators with a running time of 0.5...14.5 minutesTwo-position actuators Operating voltage AC 24 V ... AC 230 V

1.3.4 CommunicationCommunication is possible with the following units:

All Landis & Staefa controllers with LPB communication capability SYNERGYR central unit OZW30 (from software version 3.0)

1.3.5 Documentation

Type of documentation Ordering number (for English)

Data sheet RVP300 CE1N2474E



Operating instructions RVP3... 74 319 0072 0Installation Instructions RVP3... 74 319 0080 0

Data sheet QAW50 CE2N1635E

Data sheet QAW70 CE2N1637E

Data sheet "LPB Basic System Data" CE1N2030E

Data sheet "LPB Basic Engineering Data" CE1N2032E


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Landis & Staefa Division Use 15.10.1999

2 Use

2.1 Types of plant

The RVP3... are suitable for all types of heating plant that use weather-compensated

flow temperature control.

With regard to d.h.w. heating, the RVP3... are suited for plants with storage tanks

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 cen-

tral or decentral d.h.w. heating

2.2 Types of houses and buildings

Basically, the RVP3... are suited for use in all types of houses and buildings. However,

they have been designed especially for:

Multi-family housesSingle-family houses

Small to medium-size non-residential buildings

2.3 Types of heating systems

The RVP3... are suited for use with all standard heating systems, such as:

Radiators ConvectorsUnder floor heating systemsCeiling heating systemsRadiant panels

2.4 FunctionsThe RVP3... are used if one or several of the following functions is / are required:

Weather-compensated flow temperature control Flow temperature control through a modulating seat or slipper valve (three- or two-

position actuator)

Weather-compensated flow temperature control and simultaneous demand- depend-ent control of the boiler temperature

D.h.w. storage tank charging through control of a charging pump, with or without cir-culating pump

Optimum start / stop control according to the selected weekly program Quick setback and boost heating according to the selected weekly program

ECO function: demand-dependent switching of the heating system based on the typeof building construction and the outside temperature

Multi-functional relay Weekly program for building occupancy with a maximum of three setback periods per

day and daily varying occupancy schedules

Own weekly switching program for the release of d.h.w. heating Input of one holiday period per year Automatic summer-/wintertime changeover Display of parameters, actual values, operational statuses and fault status 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


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Landis & Staefa Division Use 15.10.1999

Minimum and maximum limitation of the flow temperature Maximum limitation of room temperature Periodic pump run Pump overrun Maximum limitation of the rate of setpoint increase Legionella function Manual d.h.w. charging

For the preprogrammed heating and d.h.w. heating circuits and their possible combina-

tions, refer to section 3.2 Plant types.


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Landis & Staefa Division Fundamentals 15.10.1999

3 Fundamentals

3.1 Key technical features

The RVP3... offer two key technical features:

RVP300 and RVP320 have two plant types pre-programmed, P310 one. Each planttype is comprised of a heating circuit and a d.h.w. circuit.

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 no. 1 "Space heating with mixing valve" Heating circuit plant type no. 2 "Space heating with district heat" Heating circuit plant type no. 3 "Space heating with mixing valve and precontrol with

boiler"

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 no. 0 "No d.h.w." D.h.w. plant type no. 1 "Storage tank with charging pump"

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 "Space heating"Function block Actuator heating circuit"Function block "Boiler"Function block "Setpoint of return temperature limitation"Function block "District heat"Function block "D.h.w."Function block "Multi-functional relay" 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 functions required for each type of plant are ready assigned. When commissioning

the installation, the relevant plant type must be selected.

Each plant type is comprised of a heating circuit and a d.h.w. circuit.


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3.2.1 Selectable combinations

Type ref-

erence

Type of heating circuit Type of d.h.w.

heating

RVP300 RVP310 RVP320

10 Space heating with

mixing valve

No d.h.w.


mixing valve

Storage tank with

charging pump


district heat

No d.h.w.


mixing valve and pre-

control with boiler

No d.h.w.


mixing valve and pre-

control with boiler

Storage tank with

charging pump

3.2.2 Plant type 10: Space heating with mixing valve, no d.h.w.

B7

N1

A6

B1Y1

E2

M2

B9 LPB

B5

2

474S01

Space heating with weather-compensated flow temperature control (three-position or

two-position control).

Outside temperature signal from own sensor or data bus. With or without room tem-perature influence. Heating up and setback according to the heating program.

No d.h.w.

3.2.3 Plant type 11: Space heating with mixing valve, d.h.w.

heating with charging pump

B31

M3

K6

K6

2475S01B7

N1

A6

B1Y1

E2

M2

B9 LPB

B5


two-position control).

Outside temperature signal from own sensor or data bus. With or without room tem-

perature influence. Heating up and setback according to the heating program.

Charging of d.h.w. storage tank through control of the charging pump. D.h.w. control with

temperature sensor or control thermostat. Circulating pump or electric immersion heaterare optional.


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3.2.4 Plant type 20: Space heating with district heat, no

d.h.w.

B9

M2

E2

B7

N1

Y1

B1B5A6

2474S02

LPB

E3

Space heating with district heat connection, with weather-compensated flow tempera-

ture control acting on the valve in the primary return (three-position or two-position

control).



No d.h.w.

3.2.5 Plant type 30: Space heating with mixing valve and

precontrol with boiler, no d.h.w.

2476S01

B7

N1

A6

B1Y1

E2

M2

B9 LPB

B5B2E1 M1


two-position control). Simultaneous demand-dependent control of the boiler tempera-

ture, two-position control through control of the burner.



No d.h.w.


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3.2.6 Plant type 31: Space heating with mixing valve and

precontrol with boiler, d.h.w. heating with charging pump

2476S02

B31

M3

K6

K6

B7

N1

A6

B1Y1

E2

M2

B9 LPB

B5B2E1 M1


two-position control). Simultaneous demand-dependent control of the boiler tempera-

ture, two-position control through control of the burner.



Charging of d.h.w. storage tank through control of the charging pump. D.h.w. control with

temperature sensor or control thermostat Circulating pump or electric immersion heater

are optional.

A6 Room unit QAW50 or QAW70 E3 Heat exchanger

B1 Flow sensor LPB Data bus

B2 Boiler temperature sensor K6 Electric immersion heater/circulating pump

B31 Storage tank temperature sensor / thermostat 1 M1 Circulating pump

B5 Room temperature sensor M2 Heating circuit pump

B7 Return temperature sensor M3 Charging pump

B9 Outside sensor N1 Controller RVP3...

E1 Heat generator (boiler) Y1 Heating circuit mixing valve

E2 Load (space)

3.3 Setting levels, function blocks and plant types

Plant typeOperational

level

Function block

10 11 20 30 31

End user space heating

End user d.h.w. heating

Enduser

End user general

Plant type

Space heating

Actuator heating circuit

Boiler:

Setpoint of return temperature limitation

District heat

D.h.w.

Multi-functional relay

Heating

engineer

Service functions and general settings

Locking level Locking functions

The above table shows

the assignment of function blocks to the three operational levels the function blocks activated with the different plant types


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3.4 Heating circuit operating modes

The heating circuit operating mode is selected on the controller by pressing the respec-

tive 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 weekly program entered Automatic changeover to holiday mode, and back, according to the holiday schedule

entered

Demand-dependent switching of the heating system in function of the room and out-side temperature while giving consideration to the building's thermal inertia (ECO

function)

Remote operation from a room unit (optional) Frost protection is ensured

3.4.2 Continuously REDUCED heating

Continuous heating to the REDUCED temperature

With ECO functionNo holiday modeRemote operation from a room unit not possibleFrost protection is ensured

3.4.3 Continuously NORMAL heating

Continuous heating to NORMAL temperature

No ECO functionNo holiday modeRemote operation from a 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. operating modes

D.h.w. heating is switched on and off by pressing the respective button:

ON (button is lit): D.h.w. heating takes place independent of the heating circuits op-

erating mode and control. The d.h.w. can be heated in one of three different ways: 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 deac-

tivated when using controllers with no bus connection (with data bus, depending on

the setting made).

OFF (button dark): No d.h.w. Frost protection is ensured


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3.6 Manual operation

The RVP3... can be switched to manual operation. In that case, the control will be

switched off.

In manual operation, the various regulating units behave as follows:

Heating circuit mixing valve: no power present, but valve can be controlled manuallywith the manual operation buttons ( and ):

Three-position actuators: can be driven to any position by pressing (close) und

(open).

Two-position actuators: power supply to the actuator can be switched on by pressing

and off by pressing .

The heating circuit pump M2 is continuously running.

Boiler: The two burner stages are continuously on. The circulating pump M1 is con-tinuously running

D.h.w. charging pump: The charging pump is continuously running Circulating pump K6: It is continuously running. Electric immersion heater K6: It is continuously released. Multi-functional relay: It is continuously energized.Manual operation also negates any overriding of the controller's operating mode

(bridging of H1M).

3.7 Plant type and operating mode

Depending on the type of plant selected, the following operating modes are available:

Plant type

10, 20, 30 YES YES YES YES NO YES

11, 31 YES YES YES YES YES YES

3.8 Operational status and operational level

The user selects the required operating mode by pressing the respective button. Each

operating mode has a maximum of two operational statuses with the exception of op-

erating mode "Continuously NORMAL heating" (only one operational status possible).

When the ECO function is active, and in the case of quick setback, the operational

status is always OFF.

When the operational status is ON, there is a maximum of three operational levels, de-

pending on the operating mode. The operational level is determined by the heating

program and the holiday program.

OFF ON OFF ON OFF ON ON

Operating mode

Operational status

Operational level

2522B03e


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Landis & Staefa Division Acquisition of measured value 15.10.1999

4 Acquisition of measured value

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 Two units can be connected to the terminals. In that case, the RVP3... can ascertain

the average of the two measurements. The other room unit functions will not be af-

fected by averaging

4.1.2 Handling of faults

If there is a short-circuit or open-circuit in one of the two 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. A fault status 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 de-

pending on the function of the room model. A fault status 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 de-

pending on the function of the room model. A fault status message will be generated.

Average value (operating line 65 = 3):In the event of a short-circuit or open-circuit in one of the two measuring circuits, the

control continues to operate with the normally working measuring circuit. A faultstatus message will be generated.

In the case of a short-circuit or open-circuit in both measuring circuits, the control

continues to operate depending on the function of the room model. Two fault status

messages will be generated

Automatic mode (operating line 65 = 4):Since the controller itself decides how it acquires the room temperature, no fault

status messages can be generated

4.1.3 Room model

The RVP3... features a room model. It simulates the development of the room tem-

perature. In plants with no measurement of the room temperature, it can provide certainroom functions (e.g. quick setback).

For more details, refer to section 9.4.6 Room model temperature.

4.2 Flow temperature (B1)

4.2.1 Measurement

The flow temperature is acquired with one sensor. It must have a sensing element LG-

Ni 1000 .


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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 three-position control:The heating circuit pump M2 continues to run and the mixing valve will close

Plants with two-position control:The heating circuit pump M2 continues to run and the actuator is de-energized.

4.3 Outside temperature (B9)

4.3.1 Measurement

The outside temperature is acquired with the outside sensor. This may be a QAC22 or

QAC32:

QAC22: sensing element LG-Ni 1000 at 0 C QAC32: sensing element NTC 575 at 20 CThe 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 databus.


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 temperature. A fault status

message will be generated.

Controller connected to the data bus (LPB):If the outside temperature is available via the data bus, it will be used. A fault status

message will not be generated (this is the normal status 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, a fault status message will be

generated

4.4 Return temperature (B7)

4.4.1 Measurement

The return temperature is acquired with a sensor having a sensing element LG-

Ni 1000 . This measured value is required for the minimum and maximum limitation of

the return temperature.In interconnected plants, the return temperature with plant type 1x can be acquired via

the data bus. Controllers with plant type 10 and connected sensor pass the return

temperature signal to the data bus.


If there is a short-circuit or open-circuit in the measuring circuit, and if the controller re-

quires the return temperature, it responds as follows:

If, on the data bus, there is a return temperature from a controller of the same seg-ment available, it is used (only with plant type no. 1x). No fault status message will

be generated since this is the normal status in inconnected plants

If, on the data bus, there is no return temperature available, the return temperaturelimitation functions will be deactivated and a fault status message generated


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4.5 D.h.w. storage tank temperature (B31)

4.5.1 Measurement

The d.h.w. storage tank temperature can be acquired:

with a sensor having a sensing element LG-Ni 1000 .with a thermostat


The controller's response to faults in the measuring circuit depends on the type of

d.h.w. demand (setting on operating line 126):

with a d.h.w. storage tank temperature sensor (operating line 126 = 0):If there is a short-circuit or open-circuit in the measuring circuit, a fault status mes-

sage will be generated The d.h.w. will no longer be heated and the charging pump is

deactivated.

with a d.h.w. storage tank thermostat (operating line 126 = 1):If, in measuring circuit B31, there is neither an open-circuit (thermostat open) nor a

short-circuit (thermostat closed), a fault status message will be generated. The d.h.w.

will no longer be heated and the charging pump is deactivated.


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Landis & Staefa Division Function block "Enduser space heating" 15.10.1999

5 Function block "Enduser spaceheating"

This function block contains settings that the enduser himself can make.

5.1 Operating lines

Line Function, parameter Unit Factory

setting

Range

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 heating program) 1-7 1...7, 1-7

5 First heating period, start of NORMAL heating hh:mm 06:00 --:-- / 00:00...24:00

6 First heating period, start of REDUCED heating hh:mm 22:00 --:-- / 00:00...24:00

7 Second heating period, start of NORMAL heating hh:mm --:-- --:-- / 00:00...24:00

8 Second heating period, start of REDUCED heating hh:mm --:-- --:-- / 00:00...24:00

9 Third heating period, start of NORMAL heating hh:mm --:-- --:-- / 00:00...24:00

10 Third heating period, start of REDUCED heating hh:mm --:-- --:-- / 00:00...24:00

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 Heating curve, flow temperature setpoint TV1 at

an outside temperature of 15 C

C 30 20...70

15 Heating curve, flow temperature setpoint TV2 atan outside temperature of 5 C

C 60 20...120

5.2 Setpoints

5.2.1 General

The setpoints of the NORMAL and the REDUCED room temperature and of frost pro-

tection 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.

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 temperature 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 RVP3... provides a maximum of three heating periods perday. Also, every weekday may have different heating periods.

Note:

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 acivated).

Using the setting "1-7" on operating line 4, it is possible to enter a heating program that

applies to all days of the week. This simplifies the settings: If the weekend times differ,

enter the times for the entire week first, and then change days 6 and 7 as required.

The entries are sorted and overlapping heating periods combined.


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Landis & Staefa Division Function block "Enduser space heating" 15.10.1999

5.4 Holiday program

One holiday period per year can be entered. At 00:00 of the first day of the holiday pe-

riod, changeover to the setpoint of frost protection / holiday mode takes place. At 24:00

of the last day of the holiday period, the RVP3... will change to NORMAL or REDUCED

heating in accordance with the time switch settings.

The settings of the holiday period will be cleared as soon as it has elapsed.

Depending on the entry made on operating line 121, the holiday function will switch off

d.h.w. heating and the circulating pump.

The holiday program is only active in AUTO mode.

5.5 Heating curve

The heating curve can be adjusted on operating lines 14 and 15. For details, refer to

section 9.6 Heating curve.


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Landis & Staefa Division Function block "Enduser d.h.w." 15.10.1999

6 Function block "Enduser d.h.w."This function block contains one settings for d.h.w. heating that the enduser himself can

make.

6.1 Operating line


setting

Range

26 Setpoint of d.h.w. temperature C 55 20...100

6.2 Setpoint

The setpoint of the d.h.w. temperature is to be entered in C. When using a thermostat,

it must be made certain that the setpoint entered here agrees with the setpoint of the

thermostat. If there is a differential, the charging temperature cannot be correctly cal-

culated (charging temperature = setpoint [operating line 26] + boost of charging tem-

perature [operating line 127]).

If d.h.w. heating is switched to the electric immersion heater, the setpoint adjustment is

inactive in that case, since the thermostat of the electric immersion heater will ensure

temperature control of the d.h.w. storage tank.


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Landis & Staefa Division Function block "Enduser general" 15.10.1999

7 Function block "Enduser general"This function block contains settings that the enduser himself can make, as well as the

indication of faults.

7.1 Operating lines


setting

Range

31 Weekday for switching program 2 1-7 1...7, 1-7

32 Start of first ON period hh:mm 06:00 --:-- / 00:00...24:00

33 End of first ON period hh:mm 22:00 --:-- / 00:00...24:00

34 Start of second ON period hh:mm --:-- --:-- / 00:00...24:00

35 End of second ON period hh:mm --:-- --:-- / 00:00...24:00

36 Start of third ON period hh:mm --:-- --:-- / 00:00...24:00

37 End of third ON period hh:mm --:-- --:-- / 00:00...24:00

38 Time of day hh:mm 00:00...23:59

39 Weekday 1...7

40 Date dd:MM 01.01. ... 31.12.

41 Year jjjj 1995...2094

50 Indication of faults 0...255

7.2 Switching program 2

Switching program 2 of this function block can be used for one or several of the follow-

ing functions:

As a time switch program for the circulating pump As a time switch program for the release of d.h.w. heatingSwitching program 2 of the RVP3... affords up to three ON periods per day. Also, every

weekday may have different ON periods.

As with the heating program, it is not the "switching times" that are to be entered, but

the periods of time during which the program or the controlled function shall be active.

Using the setting "1-7" on operating line 31, it is possible to enter a switching program

that applies to all days of the week. This simplifies the settings: If the weekend times

are different, first enter the times for the entire week, then change days 6 and 7 as re-quired.

The entries are sorted and overlapping ON periods combined.

7.3 Time of day and date

The RVP3... have a yearly clock to enter the time of day, weekday and date.

The changeover from summer- to wintertime, and vice versa, is automatic. Should the re-

spective regulations change, the changeover dates can be adjusted (refer to chapter 16

Function block "Service functions and general settings").

7.4 Indication of faults

The following faults are indicated:

Number Fault

10 Open-circuit or short-circuit in the outside sensor's measuring circuit (B9)

20 Open-circuit or short-circuit in the measuring circuit of the boiler sensor (B2)

30 Open-circuit or short-circuit in the measuring circuit of the flow sensor (B1)

40 Open-circuit or short-circuit in the measuring circuit of the return sensor (B7)

50 Fault in the measuring circuit of the d.h.w. storage tank sensor / thermostat

(B31)

60 Open-circuit or short-circuit in the measuring circuit of the room sensor (B5)

61 Open-circuit or short-circuit in the measuring circuit of the room unit's sen-sor (A6)


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Landis & Staefa Division Function block "Enduser general" 15.10.1999

62 Wrong room unit connected

81 Short-circuit on data bus (LPB)

82 Same bus address exists on the data bus (LPB) several times

100 Two clock masters on the data bus (LPB)

140 Inadmissible bus address or inadmissible plant type

If a fault occurs, the LCD displays Er.

In interconnected plants, the address (device and segment number) of the controller

causing the fault is indicated on all the other controllers, but no address is displayed onthe controller causing the fault. No address will appear on the controller causing the

fault.

Example of display in interconnected plants:

2474Z03

50

20

06

02

= operating line

= error number

= segment number (LPB)

= device number (LPB)

The fault status message disappears only after rectification of the fault. There will be no

acknowledgement!


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Landis & Staefa Division Function block "Plant type" 15.10.1999

8 Function block "Plant type"This function block only contains the selection of the plant type.

8.1 Operating line

Line Function, parameter Factory setting Range

51 Plant type RVP300 10 10, 20RVP310 11 11

RVP320 31 30, 31

8.2 General

When commissioning the plant with RVP300 or RVP320, the respective plant type must

be entered first. This ensures that the functions required for the specific type of plant,

the parameters and operating lines for the settings and displays will be activated.

All plant-specific variables and operating lines for the other plant types will then be

dead. They will not be displayed.

RVP310: The plant type is ready selected (11).

Example of a selection:

3

0

= Heating circuit type no. 3

= D.h.w. circuit type no. 0


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Landis & Staefa Division Function block "Space heating" 15.10.1999

9.3.2 Switching the heating on

The heating will be switched on again only when allthree of the following conditions

are satisfied:

The actual outside temperature has fallen 1 C below the current ECO heating limit The composite outside temperature has fallen 1 C below the current ECO heating limit The attenuated outside temperature has fallen 1 C below the "ECO day" heating

limit

9.3.3 Operating modes and operational statuses

The ECO function is performed depending on the operating mode:

Operating mode or operational status ECO function Actual heating limit

Automatic operation Active ECO day or ECO night

Continuously REDUCED

heating

Active ECO night

Continuously NORMAL

heating

Inactive

Standby Active ECO night

Frost protection / holiday

mode

Active ECO night

Manual operation Inactive

9.4 Optimization

9.4.1 Definition and purpose

Operation of the heating system is optimized. EN 12098 defines optimization as "auto-

matic shifting of the switch-on and switch-off points aimed at saving energy". This

means that:

Switching on and heating up as well as switching off are controlled such that duringbuilding occupancy times the required room temperature level will always be ensured

The smallest possible amounts of energy will be used to achieve this objective

9.4.2 Fundamentals

It is possible to select or set:

The type of optimization: either with room temperature sensor / room unit or based onthe room model

The maximum limit value for the heating-up time The maximum limit value for optimum shutdown Quick setback: yes or noTo perform the optimization function, the controller makes use of the actual room tem-

perature acquired by a room temperature sensor or room unit or the room model.

9.4.3 Optimization with room sensor

Using a room temperature sensor or room unit, it is possible to have optimum start and

optimum stop control.

To be able to optimally determine the switch-on and switch-off points, optimization

needs to "know" the building's heating up and cooling down characteristics, always in

function of the prevailing outside temperature. For this purpose, optimization continuallyacquires the room temperature and the respective outside temperature. It captures


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these variables via the room temperature sensor and the outside sensor and continu-

ally adjusts the forward shift of the switching points. In this ways, optimization can also

detect changes made to the building and to take them into consideration.

The learning process always concentrates on the first heating period per day.

9.4.4 Optimization with room sensor

When no room temperature sensor is used, the room model onlyallows optimum start

control.

Optimization operates with fixed values (no learning process), based on the set maxi-

mum heating up time and the room model.

9.4.5 Process

HP

TRw TRx

TRwTRw

TRw

HP Heating program

TR Room temperaturet Time

t1 Forward shift for early shutdown

t2 Forward shift for the start of heating up

t3 Quick setback

TRw Room temperature setpoint

TRw Setpoint of NORMAL room temperature

TRw Setpoint of REDUCED room temperature

TRw (with boost heating)TRx Actual value of room temperature

9.4.6 Room model temperature

To ascertain the room temperature generated by the room model, a distinction must be

made between two cases:The controller is not in quick setback mode:The room temperature generated by the room model is identical to the actual room

temperature setpoint

The controller is in setback mode:The room temperature generated by the room model is determined according to the

following formula:

t

Room model temperature TRM[C] = (TRw -TAM) *e3 * kt


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2522D18

t1

TRwT

RM

TRw

TRw

Development of room temperature as generated by the room model

e 2.71828 (basis of natural logarithms) TR Room temperature

kt Building time constant in hours TRM Room model temperature

t Time in hours TRw Setpoint of NORMAL room temperature

t1 Quick setback TRw Setpoint of REDUCED room temperature

TAM Composite outside temperature

9.4.7 Optimum stop control

During the building's occupancy time, the controller maintains the setpoint of NORMAL

heating. Toward the end of the occupancy time, the control switches to the REDUCED

setpoint. Optimization calculates the changeover time such that, at the end of occu-

pancy, the room temperature will be 0.5 C below the setpoint of NORMAL heating (op-

timum shutdown).

By entering 0 hours as the maximum optimum shutdown, optimum stop control can be

deactivated.

9.4.8 Quick setback

When changing from the NORMAL temperature to a lower temperature level (RE-

DUCED or holidays / frost), the heating will be shut down. And it will remain shut down

until the setpoint of the lower temperature level is reached.

When using a room temperature sensor, the effective actual value of the room tem-perature is taken into account

When using no room temperature sensor, the actual value is simulated by the roommodel

The duration is determined according to the following formulaTRw -TAM

t [ h ] = 3 *kt*(-ln )

TRw -TAMwhere:ln Natural logarithm

kt Building time constant in hours

t Duration of quick setback

TAM Composite outside temperature



9.4.9 Optimum start control

During the building's non-occupancy times, the controller maintains the setpoint of RE-

DUCED heating. Toward the end of the non-occupancy time, optimization switches the

control to boost heating. This means that the selected boost will be added to the room

temperature setpoint. Optimization calculates the changeover time such that, at the


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start of occupancy, the room temperature will have reached the setpoint of NORMAL

heating.

When the room temperature is simulated by the room model, that is, when using no

room temperature sensor, the forward shift in time is calculated as follows:

t [ min ] = ( TRw -TRM) *60

where:

t Forward shift

TRw Setpoint of NORMAL room temperatureTRM Room model temperature

Optimum start control with the room model takes place only if, previously, quick setback

was effected.

Optimum start control can be deactivated by entering 0 hours as the maximum heating

up period.

9.4.10 Boost heating

For boost heating, a room temperature setpoint boost can be set.

After changeover to the NORMAL temperature, the higher room temperature setpoint

applies, resulting in an appropriately higher flow temperature setpoint.

D.h.w. heating during boost heating does not affect the latter.

t

2522D08

TR

TRw

TRx

TRw

TRw

TRw

t TimeTR Room temperature



TRx Actual value of room temperature


TRw Boost of room temperature setpoint (with boost heating)

Duration of boost:

When using a room temperature sensor, boost heating is maintained until the room

temperature has reached the setpoint of NORMAL heating. Then, that setpoint will beused again

When using no room temperature sensor, the room model calculates how long boostheating will be maintained. The duration is determined according to the following for-

mula

TRw -TRM1 ktt1[ h ] = 2 *TRw -TRw

*

20

The duration of the boost is limited to two hours.


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t

2522D19

TRM

TR

t1

TRM1

TRw

TRw

TRw

TRw

where:

kt Building time constant in hours

t Time

t1 Duration of room temperature setpoint boost

TR Room temperature



TRM Room model temperature

TRM1 Room model temperature at the start of boost heating


TRw Boost of room temperature setpoint (with boost heating)

9.5 Room functions

9.5.1 Maximum limitation of room temperature

For the room temperature, it is possible to have an adjustable maximum limitation. A

room temperature sensor is required (sensor or room unit).

If the room temperature lies 1 C above the limit value, the room temperature setpoint

will be lowered by 4 C.

Maximum limitation of the room temperature is independent of the setting used for the

room temperature influence.

If the room temperature lies above the limit value, the display shows .

The reduction of the flow temperature setpoint TVwis calculated as follows:

TVw[K] = TRw*( 1 + s )

-1 -0,5 0,5 1 1,5 2 2,5 3

TRw

TR

s Heating curve slope

TRw Reduction of room temperature setpointTR Deviation of room temperatureTVw Reduction of flow temperature setpoint


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9.5.2 Room temperature influence

The room temperature is included in the control process. A room temperature sensor is

required (sensor or room unit).

The gain factor for the room temperature influence can be adjusted. This indicates to

what extent deviations of the actual room temperature from the setpoint have an impact

on flow temperature control:

0 = room temperature deviations have no impact on the generation of the setpoint

20 = room temperature deviations have a maximum impact on the generation of the

setpoint

The change of the room temperature setpoint TRwis calculated according to the fol-

lowing formula:

VFTRw[K] =

2* ( TRw-TRx)

TRw

TR

TRw

The change of the flow temperature setpoint TVwresulting from the change of the

room temperature setpoint is calculated as follows:

TVw[K] = TRw*( 1 + s )



TRw Change of room temperature setpointTRw Decrease of room temperature setpoint+TRw Increase of room temperature setpointTRx Actual value of room temperature

TR Room temperature deviation (TRw-TRx)TVw Change of flow temperature setpointVF Gain factor

9.6 Heating curve

9.6.1 Purpose

With the space heating systems, flow temperature control is always weather-

compensated. The assignment of the flow temperature setpoint to the prevailing out-

side temperature is made via the heating curve.

9.6.2 Basic setting

The setting of the heating curve is made via two operating lines. The following settings

are required:

Flow temperature setpoint at an outside temperature of 5 C Flow temperature setpoint at an outside temperature of 15 CThe basic setting during commissioning is made according to the planning documenta-

tion or in agreement with local practices.It is made on operating lines 14 and 15.


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Operating line Setpoint

14 TV1, current flow temperature setpoint at an outside

temperature of 15 C

15 TV2, current flow temperature setpoint at an outside

temperature of 5 C

2474Z06

120

110

100

90

80

70

60

40

30

20

10

20 15 10 5 0 -5

50

-10 -15 -20 -30

BZ 14 BZ 15

TVw

TA

Basic setting of heating curveBZ 14 Setting on operating line 14, flow temperature setpoint at 15 C outside temperature

BZ 15 Setting on operating line 15, flow temperature setpoint at 5 C outside temperature

TA Outside temperature

TVw Flow temperature setpoint

9.6.3 Deflection

The heat losses of a building are proportional to the difference between room tem-perature and outside temperature. By contrast, the heat output of radiators does not in-

crease proportionally when the difference between radiator and room temperature in-

creases. For this reason, the radiators' heat exchanger characteristic is deflected. The

heating curve's deflection takes these properties into consideration.

In the range of small slopes (e.g. with underfloor heating systems), the heating curve is

practically linear due to the small flow temperature range and therefore corresponds

to the characteristic of low temperature heating systems.

The slope s is determined according to the following formula:

TVw(5)TVw(+15)

s = 20 K


TVw(5) Flow temperature setpoint at an outside temperature of 5 CTVw(+15) Flow temperature setpoint at an outside temperature of 15 C

The heating curve is valid for a room temperature setpoint of 20 C.


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9.6.4 Parallel displacement of heating curve

The heating curve can be displaced parallel with the setting knob for room temperature

readjustments. The readjustment can be made by the enduser and covers a maximum

range of 4.5...+4.5 C room temperatureThis parallel displacement of the heating curve is calculated as follows:

Parallel displacement TFlow= ( TKnob)*( 1 + s )

20 10 0 -10 -20 -30

90

80

70

60

50

40

30

2522D10

100

0

1010

0

30

TRw

TA

TV

Parallel displacement of heating curve

s Slope

TA Outside temperature

TV Flow temperature



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9.7 Generation of setpoint

Weather-compensated control is used with all plant types. The setpoint is generated in

function of the outside temperature via the heating curve. The temperature used is the

compositeoutside temperature.

SYNERGYROZW30

1 + s

20 C

1 + s

2474B01e

scomposite outsidetemperatur

setting knobroom unit *

heating curve

setting knobon controller

flow temperaturesetpoint TVw

room setpoint

or

operating line1, 2 oder 3

LPB Data bus

OZW30 SYNERGYR central unit

s Slope

* Active only with room unit level

The impact of the central unit OZW30 is described in section 18.1.4 Combination with

central unit OZW30.


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Landis & Staefa Division Function block Actuator heating circuit" 15.10.1999

The rate of increase of the flow temperature setpoint can be limited to a maximum. In

that case, the maximum rate of increase of the flow temperature setpoint is the selected

temperature per unit of time (C per hour). This function:

prevents cracking noise in the piping protects objects and construction materials that are sensitive to quick temperature in-

crease (e.g. antiquities)

prevents excessive loads on heat generating equipmentThis function can be deactivated (setting ---).

10.3 Type of actuator

On operating line 88, it is possible to select the type of actuator (type of control):

0 = Two-position control

1 = Three-position control

10.3.1 Two-position control

The two-position control operates as weather-compensated flow temperature control.

The flow temperature is controlled through ON / OFFof the regulating unit (mixing

valve). The switching differential can be adjusted on operating line 89.

2474D01

ON

OFF

TVw

SD2

SD2

TV

ON Actuator operating

OFF Actuator without power supply

SD Switching differntial (operating line 89)

TV Flow temperature

TVw Flow temperature setpoint

10.3.2 Three-position control

The three-position control operates as weather-compensated PI flow temperature con-

trol. The flow temperature is controlled through a modulating regulating unit (slipper or

seat valve). Owing to the I-part, there is no control offset.

10.4 Auxiliary variables in interconnected plants

10.4.1 Excess flow temperature mixing valve / heat exchanger

In interconnected plants, an excess flow temperature mixing valve resp. heat ex-

changer can be entered on the RVP3... . This is a boost of the respective heating

zone's flow temperature setpoint. The higher setpoint is delivered to the heat generat-

ing equipment as the heat demand signal (in the controller itself or via data bus).

The excess mixing valve or heat exchanger temperature is set on the controller thatdrives the mixing valve (controller N2 in the example below) (operating line 84).


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Landis & Staefa Division Function block Actuator heating circuit" 15.10.1999

Example:

N2

wN2wN1 = wN2+ w 2

522S07

wN2 + w

w

N1 Boiler temperature controller (heat generation)

N2 Flow temperature controller (heating zone)

wN1 Setpoint of boiler temperature controller

wN2 Setpoint of flow temperature controller

w (set on control ler N2)

10.5 Pulse lock with three-position actuator

If, during a period of time that equals five times the running time, the three-position ac-

tuator has received only closing or only opening pulses, additional closing pulses deliv-

ered by the controller will be locked. This minimizes the strain on the actuator.

For safety reasons, the controller delivers a one-minute closing pulse at 10-minute in-

tervals.

An opening pulse negates the pulse lock.


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Landis & Staefa Division Function block "Boiler" 15.10.1999

11 Function block "Boiler"Function block "Boiler" acts as a two-position controller and is used for direct burner

control. The function block operates either as demand-dependent boiler temperature

controller of a common flow, which supplies heat to one or several consumers.

11.1 Operating lines

Line Function, parameter Unit Factory setting

Range

91 Operating mode of boiler 0 0...2

92 Maximum limitation of boiler temperature C 95 25...140

93 Minimum limitation of boiler temperature C 10 5...140

94 Switching differential of boiler C 6 1...20

95 Minimum limitation of burner running time min 4 0...10

96 R

Documents

Heating Circuit and D H W Controller 17588 Hq En