Siemens RVA47.320 User Manual

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Ausgabe 2.2 Controller series B CE1P2379E

15.07.2002

Siemens Building Technologies

HVAC Products

RVA47.320 Cascade Controller for modulating gas-fired Boilers

Basic Documentation

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E HVAC Products 15.07.2002

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E HVAC Products Contents 15.07.2002

Contents

1 Summary ......................................................................................................... 8

1.1 Brief description............................................................................................... 8

1.2 Features .......................................................................................................... 9

1.3 Range of products ......................................................................................... 11

1.4 Field of use .................................................................................................... 12

1.5 Product liability .............................................................................................. 12

2 Handling ........................................................................................................ 13

2.1 Installation ..................................................................................................... 13

2.1.1 Mounting location .......................................................................................... 13

2.1.2 Regulations for installation ............................................................................13

2.1.3 Mounting procedure....................................................................................... 13

2.1.4 Required cut-out ............................................................................................ 15

2.1.5 Orientation ..................................................................................................... 15

2.2 Electrical installation ...................................................................................... 16

2.2.1 Regulations for installation ............................................................................16

2.2.2 Wiring ............................................................................................................ 16

2.3 Commissioning .............................................................................................. 18

2.3.1 Functional checks.......................................................................................... 18

2.4 Parameter settings for the enduser ............................................................... 20

2.4.1 Overview of enduser parameters ..................................................................21

2.5 Parameter settings for the heating engineer .................................................22

2.5.1 Overview of heating engineer parameters..................................................... 23

2.6 Parameter settings for the OEM .................................................................... 27

2.6.1 Overview of OEM parameters ....................................................................... 28

2.7 Operation.......................................................................................................30

2.7.1 Operating elements ....................................................................................... 30

2.8 Operational faults .......................................................................................... 31

3 Description of the enduser settings ............................................................... 32

User interface ................................................................................................................32

3.1 Heating circuit operating modes .................................................................... 32

3.2 Operating mode of d.h.w. heating .................................................................33

3.3 Nominal room temperature setpoint .............................................................. 34

3.4 Manual operation...........................................................................................35

Setting the clock ............................................................................................................37

3.5 Time of day....................................................................................................37

3.6 Weekday........................................................................................................ 37

3.7 Date (day, month)..........................................................................................38

3.8 Year ............................................................................................................... 38

Time switch program for space heating......................................................................... 39

3.9 Preselecting the weekday.............................................................................. 39

3.10 Switching times.............................................................................................. 40

D.h.w. values .................................................................................................................42

3.11 Nominal d.h.w. temperature setpoint............................................................. 42

Heating circuit values .................................................................................................... 43

3.12 Reduced room temperature setpoint ............................................................. 43

3.13 Frost protection setpoint of the room temperature ........................................44

3.14 Summer / winter changeover temperature of the heating circuit ................... 44

3.15 Heating curve slope....................................................................................... 46

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Actual values..................................................................................................................48

3.16 Actual value of the room temperature............................................................48

3.17 Actual value of outside temperature ..............................................................48

Maintenance ..................................................................................................................49

3.18 Standard time switch program for heating circuit and d.h.w. .........................49

Time switch program for d.h.w. heating .........................................................................50

3.19 Preselecting the weekday ..............................................................................50

3.20 Switching times ..............................................................................................50

Service . ...................................................................................................................52

3.21 Displaying the BMU error code ......................................................................52

3.22 Indication of faults ..........................................................................................53

4 Description of the heating engineer settings..................................................55

Service values................................................................................................................55

4.1 Output test .....................................................................................................55

4.2 Input test ........................................................................................................55

4.3 Display of plant type.......................................................................................56

4.4 Displaying the PPS communication ...............................................................58

Actual values..................................................................................................................60

4.5 Actual boiler temperature values of BMUs (TKx)...........................................60

4.6 Actual value of cascade flow temperature .....................................................60

4.7 Actual value of the cascade return temperature ............................................61

4.8 Actual value of buffer storage tank temperature ............................................63

4.9 Actual value of the d.h.w. temperature (TBWx) .............................................63

4.10 Attenuated outside temperature.....................................................................64

4.11 Composite outside temperature.....................................................................65

Setpoints . ..................................................................................................................66

4.12 Outside temperature source ..........................................................................66

4.13 Boiler temperature setpoint of BMUs .............................................................66

4.14 Setpoint of the cascade flow temperature......................................................67

4.15 D.h.w temperature setpoint............................................................................67

4.16 Nominal room temperature setpoint...............................................................68

4.17 Room temperature setpoint ...........................................................................69

4.18 Flow temperature setpoint .............................................................................69

Heat generation values ..................................................................................................70

4.19 Existing boilers...............................................................................................70

4.20 Display lead boiler..........................................................................................70

4.21 Remaining number of operating hours for changeover of boiler sequence ...71

4.22 Burner operating hours BMU 1 – 4 ................................................................72

4.23 Minimum limitation of the boiler temperature TKmin......................................72

4.24 Nominal output of BMU 1 - 4..........................................................................73

Configuration of plant.....................................................................................................74

4.25 Pump function output Q1 ...............................................................................74

4.26 Use sensor input B70/B4 ...............................................................................74

Heating circuit values.....................................................................................................76

4.27 Parallel displacement of the heating curve ....................................................76

4.28 Room influence ..............................................................................................76

4.29 Switching differential of the room temperature ..............................................77

4.30 Minimum limitation of the flow temperature setpoint......................................78

4.31 Maximum limitation of the flow temperature setpoint.....................................79

4.32 Type of building construction .........................................................................80

4.33 Adaption of the heating curve ........................................................................81

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4.34 Maximum forward shift of optimum start control............................................ 82

4.34.1 Optimum start control .................................................................................... 83

4.34.2 Without room influence.................................................................................. 83

4.34.3 With room influence....................................................................................... 83

4.35 Maximum forward shift of optimum stop control ............................................ 84

4.35.1 Optimum stop control ....................................................................................84

D.h.w. values .................................................................................................................85

4.36 Reduced setpoint of the d.h.w. temperature.................................................. 85

4.37 Release of d.h.w. heating .............................................................................. 85

4.37.1 24-hour operation - Setting 0......................................................................... 86

4.37.2 Operation according to heating program(s) with forward shift - Setting 1 ..... 86

4.37.3 Operation according to the d.h.w. time switch program - Setting 2 ...............87

4.38 Switching program circulating pump.............................................................. 87

4.39 Assignment of d.h.w. heating ........................................................................88

4.40 Number of d.h.w. charging cycles .................................................................88

4.40.1 Once per day with a forward shift of 2.5 hours Setting 0............................... 89

4.40.2 Several times per day with a forward shift of 1 hour Setting 1 ......................89

4.41 Type of d.h.w. demand .................................................................................. 89

4.42 Boost of the flow temperature setpoint for d.h.w. ..........................................90

4.43 D.h.w. priority................................................................................................. 91

4.43.1 Shifting priority............................................................................................... 92

4.44 Demand for heat with reduced d.h.w. setpoint ..............................................94

Cascade settings ...........................................................................................................95

4.45 Changeover of boiler sequence in a cascade ...............................................95

4.46 Exemption from automatic changeover of the boiler sequence..................... 96

4.47 Lead boiler with a fixed changeover of the boiler sequence.......................... 97

4.48 Switch-on delay lag boilers............................................................................ 98

4.49 Restart lock of BMUs..................................................................................... 98

LPB / system ................................................................................................................. 99

4.50 LPB device address....................................................................................... 99

4.51 LPB segment address ................................................................................. 100

4.52 LPB power supply........................................................................................ 100

4.53 Displaying the LPB power supply ................................................................101

4.54 Displaying the LPB communication ............................................................. 101

4.55 Range of action of central changeover........................................................ 102

4.56 Automatic summer / winter changeover ...................................................... 102

4.57 Central standby switch ................................................................................103

4.58 Clock mode.................................................................................................. 103

4.59 Winter- / summertime changeover ..............................................................104

4.60 Summer- / wintertime changeover............................................................... 105

Input H1 . .............................................................................................................. 106

4.61 Input H1 ....................................................................................................... 106

4.61.1 Changeover of operating mode (remote telephone switch) - Setting 0 / 1 107

4.61.2 Minimum setpoint of flow temperature contact H1 ......................................108

4.61.3 Heat generation lock - Setting 3 ................................................................ 108

4.61.4 Demand for heat - Setting 4 ......................................................................109

4.62 Minimum setpoint of flow temperature contact H1 ......................................110

4.63 Maximum value of heat demand signal DC 0...10 V (H1) ...........................111

4.64 Operating action of the contact connected to H1 ........................................111

5 Description of the OEM settings .................................................................. 112

Heat generation values................................................................................................ 112

5.1 Minimum limitation of the boiler temperature setpoint OEM (TKmin

OEM

).....112

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5.2 Maximum limitation of the boiler temperature setpoint ................................112

5.3 Pump overrun time.......................................................................................113

5.4 Minimum limitation of the boiler return temperature.....................................113

5.5 Calibration of actual output range of BMU 1-4.............................................114

Heating circuit values...................................................................................................115

5.6 Gain factor of room influence (KORR) .........................................................115

5.7 Constant for quick setback (KON) ...............................................................116

5.8 Boost of room temperature setpoint.............................................................117

5.9 Frost protection for the plant ........................................................................118

5.10 Overtemperature protection for the pump heating circuit.............................119

5.11 Heat gains....................................................................................................120

5.12 Adaption sensitivity 1 ...................................................................................120

5.13 Adaption sensitivity 2 ...................................................................................121

D.h.w. values ...............................................................................................................123

5.14 Maximum nominal setpoint of d.h.w. temperature .......................................123

5.15 Switching differential of the d.h.w. temperature ...........................................123

5.16 Legionella function .......................................................................................124

5.17 Setpoint of the legionella function ................................................................125

5.18 Protection against discharging of d.h.w. ......................................................125

Cascade settings .........................................................................................................127

5.19 Cascade management strategy ...................................................................127

5.19.1 Type of lead boiler operation .......................................................................128

5.19.2 Running time strategies ...............................................................................129

5.20 Lower limit of output range (Pmin) ...............................................................131

5.21 Upper limit of output range (Pmax) ..............................................................132

5.22 Mandatory time on basic stage ....................................................................132

5.23 Minimum temperature differential at the pressureless header.....................133

Configuration of plant...................................................................................................134

5.24 Continuous display.......................................................................................134

General values.............................................................................................................135

5.25 Software version ..........................................................................................135

5.26 Device operating hours ................................................................................135

6 Functions with no settings............................................................................136

6.1 Chimney sweep ...........................................................................................136

6.2 Generating the boiler temperature setpoint .................................................136

6.3 Automatic 24-hour heating limit ...................................................................137

6.3.1 Without room influence ................................................................................137

6.3.2 With room influence .....................................................................................138

6.4 Quick setback with room sensor ..................................................................139

6.5 D.h.w. push ..................................................................................................140

6.6 Pump kick ....................................................................................................141

6.7 Protection against discharging after d.h.w. heating .....................................141

6.8 Overview of pump operation ........................................................................142

6.9 Frost protection ............................................................................................143

6.9.1 For the boiler................................................................................................143

6.9.2 For the d.h.w. ...............................................................................................143

7 Application examples ...................................................................................144

7.1 Plant types RVA47.320 - no. 27...................................................................145

7.2 Plant types RVA47.320 - no. 28...................................................................146

7.3 Plant types RVA47.320 - no. 29...................................................................147

7.4 Plant types RVA47.320 - no. 30...................................................................148

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7.5 Plant types RVA47.320 - no. 31 .................................................................. 149

7.6 Plant types RVA47.320 - no. 32 .................................................................. 150

7.7 Plant types RVA47.320 - no. 33 .................................................................. 151

7.8 Plant types RVA47.320 - no. 34 .................................................................. 152

7.9 Plant types RVA47.320 - no. 35 .................................................................. 153

7.10 Plant types RVA47.320 - no. 36 .................................................................. 154

7.11 Plant types RVA47.320 - no. 65 .................................................................. 155

7.12 Plant types RVA47.320 - no. 66 .................................................................. 156

7.13 Plant types RVA47.320 - no. 67 .................................................................. 157

7.14 Legend......................................................................................................... 158

8 Dimensions.................................................................................................. 159

9 Technical data .............................................................................................160

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Siemens Building Technologies Basic Documentation RVA47.320 CE1P2379E HVAC Products Summary 15.07.2002

1 Summary

1.1 Brief description

ALBATROS™- RVA47.320 (B-series) is designed for use as a single-boiler controller or cascade controller with up to 12 heat sources. It is designed for integration in heat generating equipment / plants with

• a modulating gas burner

• a Boiler Management Unit (BMU)

• d.h.w. heating with charging pump (via RVA47) or changeover valve

(via BMU)

• a primary or heating circuit pump

Heating circuit control uses weather compensation while d.h.w. heating operates depending on the storage tank temperature and the time program.

When employed in an interconnected system along with the ALBATROS™ controller RVA43.222 (C-series), it is possible to operate mixed cascades (modulating / multistage) with up to 15 heat sources.

When used in connection with gas-fired heating boilers, the availability of a BMU is mandatory. Siemens offers different types of BMUs:

- Boiler Mangement Unit LMU5/6x It is also possible to use BMUs of other manufacture if appropriately equipped. If you intend to use a non-Siemens burner control in connection with the RVA47.230, please contact your nearest Siemens representative.

The range of products comprises several units that complement one another in terms of application and scope of functions. The controllers have communication capability and can be combined to form heating systems that include up to 40 controllers. For more detailed information about the generation of LPB systems, refer to "Local Process Bus (LPB), Basic Documentation, System Engineering”, document no. CE1P2370E.

Important

Use in extensive systems

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1.2 Features

• Heating circuit control with a pump heating circuit

• Remote operation via digital room unit

• Quick setback and boost heating

• Automatic 24-hour heating limit

• Automatic summer / winter changeover

• The building's thermal dynamics are taken into consideration

• Automatic adjustment of the heating curve to the type of building construction and

the heat demand (provided a room unit is connected)

• Overload detection (shifting priority)

• Manual operation

• Cascading with up to 12 modulating heat sources controlled by one controller in

combination with BMUs via LPB

• Cascading with up to 15 modulating heat sources and additional RVA47.320 (from

B-series) via PPS

• Control of mixed cascades (modulating or multistage) with up to 12 heat sources in

combination with RVA43.222 (from C-series) with BMUs via LPB

• Selectable boiler sequence and boiler strategy

• Weather-compensated heating circuit control with or without room influence

• Cascade flow temperature control depending on the heat demand signal from the

heating circuits connected to the system or from controllers outside the system (via input H1)

• Cascade flow temperature control depending on the temperature demand signal

(DC 0…10 V, input H1)

• Adjustable maximum limitation of temperature demand signals delivered to the

heating boiler

• Performance-related switching on / off of boilers, very accurate flow temperatures

• Supervision of operating conditions at the pressureless header, low return

temperatures

• Protection against boiler overtemperatures (pump overrun)

• Protective boiler startup (acting on the mixing valve)

• Minimum limitation of the boiler return temperature (acting on the mixing valve)

• Adjustable minimum and maximum limitation of boiler temperature (boiler flow

temperature)

• Frost protection for the building, the plant and the boiler

• Frost protection for the d.h.w. storage tank connected directly to the controller

• Pump protection through periodic pump kick

• Overtemperature protection for the pump heating circuit

Heating circuit

Heat generation

Protection for the plant

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• Temperature adjustment with the setpoint knob

• 7-day or 24-hour program for the heating circuit and d.h.w. heating

• Automatic button for efficient operation throughout the year

• D.h.w. button

• Manual operation at the touch of a button

• Output and input tests to aid commissioning and functional checks

• Straightforward selection of operating mode via buttons

• Change of operating mode via a remote switch (via contact H1)

• Heat generation lock or minimum demand for heat with the remote switch (via

contact H1)

• Service connection facility for local parameter settings and data logging

• D.h.w. heating with charging pump or via BMU with diverting valve

• D.h.w. control with temperature sensor or control thermostat

• Selectable priority for d.h.w. heating

• Selectable d.h.w. heating program

• Adjustable boost of the d.h.w. charging temperature

• Reduced setpoint of the d.h.w. temperature

• Protection against discharging of d.h.w.

• Automatic d.h.w. push

• Legionella function

• Communication via the Local Process Bus (LPB)

• Communicating via point-to-point interface (PPS)

• Controllers of other manufacture can deliver their heat demand signal by closing

potential-free contact H1

• Controllers of other manufacture can deliver their analog heat demand by using DC

0...10 V signals

• Input for cascade flow temperature sensor

• Input for cascade return temperature sensor

• Integrity of system architecture with all RVA... controllers

• Can be extended to include 40 heating circuits (with central bus power supply)

• Optional remote supervision

• Error messages (own faults, faults of LPB devices, faults of PPS devices)

• Logging the individual BMU operating hours

• Logging the number of device operating hours

Operation

D.h.w.

Use in extensive systems

Logging

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1.3 Range of products

The following units and accessories are designed for use with the ALBATROS range:

Type of unit Description Documentation no.

RVA47.320 Cascade controller for modulating gas-fired heating

boilers

CE1P2379E

RVA43.222 Boiler and heating circuit controller (from C-series) CE1P2390E RVA46.531 Heating circuit controller CE1P2372E RVA66.540 Heating circuit or primary controller CE1P2378E*

LMU5/6x

Siemens BMUs for heating circuit and d.h.w. control

............. Different types of non-Siemens burner controls for d.h.w. control (e.g.

MCBA)

OCI42

Communication interface RVA-LMU5/6x

RMCI Communication interface RVA-MCBA

QAA10 Digital room sensor QAA70 Digital, multifunctional room unit QAA50 Digital room unit

QAC31 Outside sensor NTC 600 QAC21 Outside sensor LG-Ni 1000 QAZ21 Immersion sensor LG-Ni 1000 complete with cable QAD21 Strap-on sensor LG-Ni 1000

AGP2S.02M LPB (2 poles) violet AGP2S.02G Room unit (2 poles) blue AGP2S.06A Sensor (6 poles) white AGP3S.02D Mains (2 poles) black AGP3S.03B Pumps (3 poles) brown

Controllers

Burner controls

Room units

Sensor

Screw type terminal strips (Rast 5)

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1.4 Field of use

• OEMs

• Manufacturers of modulating gas-fired appliances with BMUs

• Residential and non-residential buildings with own heating and d.h.w. heating

facility

• Residential and non-residential buildings with a central heat generating plant

• Standard heating systems, such as:

Standard heating systems, such as radiator, convector, underfloor and ceiling heating systems, and radiant panels

• With or without d.h.w. heating

• Gas-fired heating boilers with modulating burners.

• Parallel cascading with lead / lag boiler changeover or fixed priority for up to 4

modulating gas-fired boilers (of identical or different capacities) with only one controller

• Parallel cascading with up to 16 modulating gas-fired boilers (of identical or

different capacities) with additional RVA47.320 (from B-series)

• Mixed cascades with up to 16 modulating and multistage heat sources with

additional RVA47.320 (from B-series) and RVA43.222 (from C-series)

1.5 Product liability

• The products may only be used in building services plant and applications as

described above

• When using the products, all requirements specified in chapters "Handling" and

"Technical data" must be satisfied

• When using the products in a system, all requirements contained in the

documentation ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E) must be satisfied

• The local regulations for installation must be complied with

Target market

Types of buildings

Types of heating systems

Heat generating equipment

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2 Handling

2.1 Installation

2.1.1 Mounting location

• Boiler control panel

• In the control panel front

2.1.2 Regulations for installation

• A clearance of at least 10 mm must be provided on all sides of the controller,

enabling the unit to emit the amount of heat produced during its operation. The space should not be accessible and no objects should be placed there.

• The controller is designed for mounting in a boiler control panel. Power to the

controller may be supplied only after it is completely fitted in the cutout. If this is not observed, there is a risk of electric shock near the terminals and through the cooling slots.

• If the controller shall be mounted directly on the wall, a housing must be used to

provide protection against electric shock hazard. The housing must have a sufficient number of cooling slots at the bottom and the top, allowing the controller to emit the heat it produces.

• The controller has been designed based on the guidelines of safety class 2 and

must therefore be mounted in compliance with these regulations.

• The controller may not be exposed to dripping water.

• Permissible ambient temperature: 0...50 °C

2.1.3 Mounting procedure

Description Diagram

• Turn off power supply

• Pull the prefabricated cables

through the cut-out

• Plug the connectors into the

respective sockets at the rear of the controller

 Note: The connectors are coded to make certain they cannot be mixed up.

2379Z11

1. step

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• Check to ensure the fixing levers

are turned inward

• Check to make certain there is

sufficient space between the front panel and the fixing levers

2379Z12

• Slide the unit into the panel cut-out

without applying any force

 Note: Do not use any tools when inserting the unit into the cut-out. If it does not fit, check the size of the cut-out and the housing.

2379Z13

• Secure the fixing levers by

tightening the two screws on the front of the controller.

 Note: Tighten the screws only slightly . When tightening the screws, the fixing levers automatically assume their correct positions.

2379Z142379Z14

2. step

3. step

4. step

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2.1.4 Required cut-out

The controller’s mounting dimensions are 91 x 91 mm.

Due to the dimensions of the front, however, the standard spacing is 96 mm. The mechanical mounting facility allows the controller to be fitted in front panels having a thickness of 2 to 10 mm.

The mechanical mounting facility makes it possible to arrange several controllers in a row in one cut-out. In that case, it is merely necessary to have a wider panel cutout.

2379Z15

2.1.5 Orientation

To avoid overtemperatures inside the controller, the inclination may be no more than 30° and there must be a clearance of at least 10 mm on all sides of the unit. This allows the controller to emit the heat generated during operation.

Dimensions of cut-out

2...10

+0.8

-0

+0.8

-0

+0.8

-0

2371M02

188

Use of several controllers

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2.2 Electrical installation

2.2.1 Regulations for installation

• The connections for mains and low voltage are separated

• The wiring must be made in compliance with the requirements of safety class II.

This means that sensor and mains cables may not be run in the same duct

2.2.2 Wiring

When using prefabricated cables with connectors, the electrical installation is very straightforward, owing to the coding.

B10

MDA6MB

654M21M M

32F 432F LN

2379A01

B70/B4

Rear of controller

Connection terminals

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Terminal Terminals Connector

H1 input H1 AGP2S.06A (white) B70/B4 Cascade return temperature sensor B70 or

buffer storage tank temperature sensor B4 B3 D.h.w. temperature sensor or thermostat M Ground sensors B10 Cascade flow temperature sensor

(common flow temperature sensor) B9 Outside sensor

MD Ground PPS (room unit, BMU) AGP2S.02G (blue) A6 PPS (room unit, BMU)

MB Ground bus (LPB) AGP2S.02M (violet) DB Data bus (LPB)

Terminal Terminals Connector

Q3 D.h.w. charging pump AGP3S.03B (brown) Q1 Heating circuit or system pump: F1 Phase Q1 / Q3

- Not used -

- Not used

L Live AC 230 V (mains connection) AGP3S.02D (black) N Neutral conductor (mains connection)

Low voltage side

Mains voltage side

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2.3 Commissioning

To commission the controller:

1. Make certain that mounting and electrical installation are in compliance with the relevant requirements.

2. Make all plant-specific settings as described in section "Parameter settings".

3. Reset the attenuated outside temperature (operating line 19).

4. Make the functional checks.

2.3.1 Functional checks

To facilitate commissioning and fault tracing, the controller allows output and input tests to be made. With these tests, the controller’s inputs and outputs can be checked.

Buttons Explanation Line

Press one of the line selection buttons.

This will take you to the programming level "Enduser”.

Press both line selection buttons for at least 3 seconds.

This will take you to the programming level “Heating engineer” and, at the same time, to the relay test (output test).

Press the + or - button repeatedly, which will take you one test step further:

Test step 0 All outputs are switched according to actual control

operation

Test step 1 All outputs are deactivated

Test step 2 D.h.w. charging pump (Q3) is activated

Test step 3 Heating circuit or system pump activated (Q1).

You leave the programming line "Output test” by pressing either one of the line selection buttons,

or one of the operating mode buttons

 Note:

If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

contin.

display

a) The pointer below the symbol indicates the output activated b) The number indicates the current test step c) The framed number indicates the selected setting line

Prerequisites

Output test (relays)

Display

2379Z02

812162024

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Buttons Explanation Line

Press one of the line selection buttons.

This will take you to the programming level "Enduser”.

Press both line selection buttons for at least 3 seconds.

This will take you to the programming level "Heating engineer”.

Press line selection button "Up" until you reach line

52.

This will take you to the input test.

Press the + or - button repeatedly, which will take you one test step further:

Test step 0 Display of the function selected on line 97 (B70/B4)

[°C].

Test step 1 Display of d.h.w. temperature (B3).

Test step 2 Display of the cascade flow temperature (B10).

Test step 3 Display of the actual outside temperature (B9)

Test step 4 Display of room temperature acquired with room

unit connected to A6

Test step 5 Display of input H1 according to the function

selected on operating line 170 [°C, - - - , o o o].

You leave the programming line "Input test" by pressing either one of the line selection buttons,

or one of the operating mode or function buttons

 Note:

If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

Contin.

display

The selected sensor values are updated within a maximum of 5 seconds. If no sensor is present, the connecting line interrupted, or the contact open, the display shows "---”; in the event of a short-circuit, or if the contact is closed, the LCD displays "ooo”.

a) The framed number indicates the selected setting line b) Displayed value of the temperature measured c) The number indicates the selected test step

Input test (sensors)

Display

2379Z02

812162024

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2.4 Parameter settings for the enduser

The following settings can be made to meet the individual needs of the enduser.

Buttons Explanation Line

Press one of the line selection buttons.

This will take you directly to the programming level "Enduser”.

Press the line selection buttons to select the required line.

The parameter list on the next pages contains all available lines.

• • •

Press the + or - button to set the required value. The setting will be stored as soon as you leave the programming mode or change to another line.

The parameter list on the next 2 pages contains all settings that can be made.

By pressing any of the operating mode buttons, you leave the programming level "Enduser”.

 Note:

If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

Contin.

display

Description

Setting

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2.4.1 Overview of enduser parameters

Line Function Range Unit Resolution Factory

setting

Setting the clock

1 Time of day 0...23:59 h / min 1 min 2 weekday 1...7 Weekday 1 day 3 Date (day, month) 01.01...31.12 dd.MM 1 4 Year 1999...2099 jjjj 1 -

Time switch program for heating circuit

5 Weekday-preselection heating circuit

1-7 7-day block

1...7 Individual days

1-7 / 1...7 Weekday 1 day -

6 Switch-on time 1. 3rd period heating circuit 00:00...23:59 h / min 10 min 06:00 7 Switch-off time 1. 3rd period heating circuit 00:00...23:59 h / min 10 min 22:00 8 Switch-on time 2. 3rd period heating circuit 00:00...23:59 h / min 10 min - -:- 9 Switch-off time 2. 3rd period heating circuit 00:00...23:59 h / min 10 min - -:- 10 Switch-on time 3. 3rd period heating circuit 00:00...23:59 h / min 10 min - -:- 11 Switch-off time 3. 3rd period heating circuit 00:00...23:59 h / min 10 min - -:- -

D.h.w. values

13 Nominal setpoint of the d.h.w. temperature (TBWw)

TBWR Line 120 TBWmax Line 40 (OEM)

TBWR...TBWmax °C 1 55

Heating circuit values

14 Reduced room temperature setpoint (TRRw)

TRF Line 15 TRN Setpoint knob

TRF...TRN °C 0,5 16

15 Frost protection setpoint of the room temperature

(TRFw)

TRR Line 14

4...TRR °C 0,5 10

16 summer / winter changeover temperature 8...30 °C 0,5 17 17 heating curve slope

-:- - Inactive 2,5...40 Active

-:- - / 2,5...40 - 0,5 15

Actual values

18 Actual value of the room temperature (TRx) 0...50 °C 0,5 19

Actual value of the outside temperature (TAx)

To set the attenuated outside temperature to Tax, press the + / buttons simultaneously for 3 seconds.

-50...+50 °C 0,5 -

Maintenance

23 Standard time program for heating circuit and d.h.w.

To activate, press the + and - buttons simultaneously for 3 seconds

0/1 - 1 0

Time switch program for d.h.w. heating

29 preselection of weekday

1-7 7-day block

1...7 Individual days

1-7 / 1...7 Weekday 1 day -

30 Switch-on time 1. 3rd period d.h.w. 00:00...23:59 h / min 10 min 06:00 31 Switch-off time 1. 3rd period d.h.w. 00:00...23:59 h / min 10 min 22:00 32 Switch-on time 2. 3rd period d.h.w. 00:00...23:59 h / min 10 min - -:- 33 Switch-off time 2. 3rd period d.h.w. 00:00...23:59 h / min 10 min - -:- 34 Switch-on time 3. 3rd period d.h.w. 00:00...23:59 h / min 10 min - -:- 35 Switch-off time 3. 3rd period d.h.w. 00:00...23:59 h / min 10 min - -:- -

Service

49 Indication of BMU error code

1...4 = BMU number, 1...255 = error code

1...4 / 0...255 - 1 -

50 indication of faults 0..255 / 00.01–14.16 - 1 -

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2.5 Parameter settings for the heating engineer

Configuration and parameter settings to be made by the heating engineer.

Buttons Explanation Line

Press one of the line selection buttons.

This will take you first to the programming level "Enduser”.

Press both line selection buttons for at least 3 seconds.

This will take you to the programming level "Heating engineer”.

Press the line selection buttons to select the required line.

The parameter list on the next 2 pages contains all available lines.

• • •

Press the + or - button to set the required value. The setting will be stored as soon as you leave the programming mode or change to another line.

The parameter list on the next 2 pages contains all settings that can be made.

You leave the programming level "Heating engineer" by pressing one of the operating mode buttons.

 Note:

If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

Contin.

display

Description

Setting

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2.5.1 Overview of heating engineer parameters

Line Function Range Unit Resolution Factory

setting

Service values

51 Output test (relay test)

0 Control mode according to the operational status 1 All outputs are deactivated 2 D.h.w. charging pump ON Q3 3 Heating circuit / system pump ON Q1

0...3 - 1 0

52 Input test (sensor test)

0 Cascade return temperature sensor B70/B4

or buffer storage tank temperature sensor 1 D.h.w. temperature sensor B3 2 Cascade flow temperature sensor B10 3 outside temperature sensor B9 4 Room temperature sensor (room unit) A6 5 input H1 H1

0...5 - 1 0

53 Display of plant type 27...36 / 65...67 - 1 54 displaying the PPS communication

- - - No communication

1...12 PPS device address

0...255 identification code

--- / 1..12 / 0..255 - 1 -

Actual values

55 Actual value of boiler temperature of BMUs (TKx) 1)

1...4 = BMU number, 0...140 = actual value of boiler temperature (interrogate with + / - buttons)

1...4 / 0...140 °C 1 -

56 Actual value of cascade flow temperature

Input B10

0...140 °C 1 -

57 Actual value of cascade return temperature

Input B70

0...140 °C 1 -

58 actual value of buffer storage tank temperature

Input B4

0...140 °C 1 -

59 Actual value of the d.h.w. temperature (TBWx)

(Input B3 or value from BMU)

0...140 °C 1 -

Attenuated outside temperature

(Taxged)

-50.0...+50.0 °C 0.5 -

Composite outside temperature

(TAxgem)

-50.0...+50.0 °C 0.5 -

62 outside temperature source

--.-- No signal

00.01 Segment / device address

--.-- / 00.01...14.16 - - -

Setpoints

65 Setpoint of the boiler temperature of BMUs (TKx) 1)

1...4 = BMU number, 0...140 = actual value of boiler temperature (interrogate with + / - buttons)

1...4 / 0...140 °C 1 -

66 Setpoint of the cascade flow temperature 0...140 °C 1 69 Setpoint of d.h.w. temperature (TBWw) 0...140 °C 1 70 Nominal room temperature setpoint

Nominal setpoint plus readjustment made on the room unit

0.0...35.0 °C 0,5 -

71 Setpoint of room temperature (TRRw) 0.0...35.0 °C 0,5 72 Flow temperature setpoint (TVw) 0...140 °C 1 -

Heat generation values

Display of the available cascade boilers

(--- = none)

--- / 00.1...16.3 - 01.1 -

76 display lead boiler --- / 00.1...16.3 - 01.1 77

Remaining number of operating hours for changeover of boiler sequence

Only if a value is selected on line 130, otherwise the LCD displays - -

0...990 h 1 -

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Line Function Range Unit Resolution Factory

setting

80 Burner hours run BMU 1

0...65535 h 1 0

81 Burner hours run BMU 2

0...65535 h 1 0

82 Burner hours run BMU 3

0...65535 h 1 0

83 Burner hours run BMU 4

0...65535 h 1 0

90 Minimum limitation of the boiler temperature (TKmin) 1) TKmin

OEM

...TKmax

(max 95°C)

°C 1 8

91 Nominal output BMU 1

0...255 kW 1 20

92 Nominal output BMU 2

0...255 kW 1 20

93 Nominal output BMU 3

0...255 kW 1 20

94 Nominal output BMU 4

0...255 kW 1 20

Configuration of plant

pump function output Q1

1 Heating circuit pump or no pump 2 System pump for heating circuits only 3 System pump for heating circuits and d.h.w. storage tank 4 d.h.w. circulating pump 5 Pump H1

1...5 - 1

use sensor input B70/B4

1 Cascade return temperature (B70) 2 Buffer storage tank temperature sensor (B4)

1...2 - 1 1

Space heating

100 parallel displacement of the heating curve -4.5...+4.5 K (°C) 0,5 0,0 101 room influence

0 Inactive 1 Active

0 / 1 - 1 1

102 Switching differential of the room temperature (SDR)

- - . - Inactive 0,5...4,0 Active

- - . - / 0.5...4.0 K (°C) 0,5 - - . -

103 Minimum limitation of the flow temperature setpoint

(TVmin)

TVmax Line 104

8...Tvmax °C 1 8

104 Maximum limitation of the flow temperature setpoint

(TVmax)

Tvmin Line 103

TVmin...95 °C 1 80

105 type of building construction

0 Heavy 1 Light

0 / 1 - 1 1

106 adaption of the heating curve

0 Inactive 1 Active

0 / 1 - 1 1

107 Maximum forward shift of optimum start control

0 No forward shift

00:00...06:00 hh:mm 10 min 00:00

108 Maximum forward shift of optimum stop control

0 No forward shift

00:00...06:00 hh:mm 10 min 00:00

D.h.w.

120 Reduced setpoint of d.h.w. temperature (TBWR)

TBWw Line 13

8...TBWw °C 1 40

121 release of d.h.w. heating

0 24 h/day 1 According to the heating circuit time switch program)s) with forward shift 2 According to d.h.w. time switch program (lines 29...35)

0...2 - 1 1

122 switching program circulating pump

0 According to heating circuit time switch program 1 According to release of d.h.w. heating

0...1 - 1 1

123 Assignment of d.h.w. heating

0 For local consumer only 1 For all consumers in the same segment 2 For all consumers in the system

0...2 - 1 2

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Line Function Range Unit Resolution Factory

setting

124 D.h.w. charging

0 Once per day (forward shift 2.5 h) 1 Several times per day (forward shift 1h)

0 / 1 - 1 1

125 Type of d.h.w. demand

0 Sensor 1 Control thermostat

0 / 1 - 1 0

126 Flow temperature boost for d.h.w. 0...30 K 1 16 127 d.h.w. priority

0 MK + PK absolute 1 MK + PK shifting 2 None (parallel) 3 MK shifting, PK absolute

0...3 1 1 1

129 demand for heat with reduced d.h.w. setpoint

0 No (application with buffer storage tank) 1 Yes

0 / 1 - 1 1

Boiler cascade

130 changeover of boiler sequence in cascades

--- No automatic changeover (fixed boiler sequence)

10...990 Changeover according to the selected number of hours

--- / 10...990 - / hours 10 500

131 Exclusion with autom. changeover of boiler

sequence

0 None 1 First boiler 2 Last boiler 3 First and last boiler

0...3 - 1 0

132 Lead boiler with the fixed sequence 00.1...16.3 - 01.1 133 Switch-on delay lag boilers 2...120 min 1 5 134 Restart lock of BMUs 0...1800 s 10 300

LPB / system

140 LPB device address

0 Standalone

1...16 Device number

0...16 - 1 1

141 LPB segment address

0 Central segment (heat generation)

1...14 Segment (heat consumers)

0...14 - 1 0

142 LPB power supply

0 Off (central bus power supply) 1 AUTOMATIC (controller - bus power supply)

0 / 1 - 1 1

143 Displaying the LPB power supply ON / OFF - - 144 displaying the LPB communication ON / OFF - - 145

Range of action of central changeover

0 In the segment 1 In the system (if segment address = 0)

0 / 1 - 1 1

146 Automatic summer / winter changeover

0 Effect on local heating circuit only 1 Central changeover of all heating circuits

0 / 1 - 1 0

147 Central standby switch

0 OFF (Inactive) 1 ON (all units on standby)

0 / 1 - 1 0

148 clock mode

0 Autonomous clock 1 System time without remote adjustment 2 system time with remote adjustment 3 System clock (master)

0...3 - 1 3

149 Winter- / summertime changeover 01.01...31.12 tt.MM 1 25.03 150 Summer- / wintertime changeover 01.01...31.12 tt.MM 1 25.10

input H1

170 input H1

0 Changeover of operating mode (HC standby / d.h.w. off) 1 Changeover of operating mode (HC standby) 2 Minimum setpoint of flow temperature (setting on line 171) 3 Heat generation lock 4 Heat demand DC 0...10 V

0...4 - 1 0

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Line Function Range Unit Resolution Factory

setting

171 minimum setpoint of flow temperature contact H1

If activated at input H1 (setting 2)

8...TKmax °C 1 70

172 Maximum value of heat demand

If activated at input H1 (setting 4)

5...130 °C 1 100

173 operating action of the contact H1

0 N.C. contact 1 N.O.

0 / 1 - 1 1

If a BMU is connected via LPB, this setting will not be active.

The respective setting must be made directly on the BMU.

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2.6 Parameter settings for the OEM

Boiler-specific settings and protective functions for the boiler manufacturer.

Buttons Explanation Line

Press one of the line selection buttons.

This will take you first to the programming level "Enduser”.

9 s

Press both line selection buttons for at least 9 seconds.

A special display for entering the code will appear.

CODE

Press buttons

and to enter the required

combination of the access code.

If the combination of buttons is correct, you reach the programming mode ”OEM”.

 Wrong code: If the code has been entered incorrectly, the display will change to the "Parameter settings for the heating engineer”.

Press the line selection buttons to select the required line.

The parameter list on the next 2 pages contains all available lines.

• • •

Press the + or - button to set the required value. The setting will be stored as soon as you leave the programming mode or change to another line.

The following parameter list contains all available lines.

You leave the programming level "OEM" by pressing any of the operating mode buttons.

 Note:

If no button is pressed for about 8 minutes, the controller will automatically return to the operating mode selected last.

Contin.

display

2379Z02

812162024

Whether correct or incorrect, each push of a button represents irrevocably a digit of the code. As a confirmation, the respective digit changes to 1.

Description

Setting

Example

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2.6.1 Overview of OEM parameters

Line Function Range Unit Resolution Factory

setting

Heat source OEM

Minimum limitation of the boiler temperature:OEM

(TKminOEM)

8...95 °C 1 8

2 Maximum limitation of the boiler temperature (TKmax) 8...120 °C 1 80 8 Pump overrun time

(after burner OFF)

0...20 min 1 5

22 Minimum limitation of boiler return temperature 8...95 °C 1 8 25 Calibration of actual output value BMU 1

-100...100 - 1 0

26 Calibration of actual output value BMU 2

-100...100 - 1 0

27 Calibration of actual output value BMU 3

-100...100 - 1 0

28 Calibration of actual output value BMU 4

-100...100 - 1 0

Space heating OEM

30 Gain factor of room influence (KORR) 0...20 - 1 4 31 Constant for quick setback (KON)

(without room sensor)

0...20 - 1 2

32 Boost of room temperature setpoint

(with boost heating)

0...20 K (°C) 1 5

Frost protection for the plant

0 Inactive 1 Active

0 / 1 - 1 1

34 overtemperature protection for the pump heating circuit

0 Inactive 1 Active

0 / 1 - 1 1

35 Heat gains (Tf) -2...+4 °C 0,1 0 36 adaption sensitivity 1 1...15 - 1 15 37 adaption sensitivity 2 1...15 - 1 15

D.h.w. OEM

40 Maximum nominal setpoint of the d.h.w. temperature

(TBWmax)

8...80 °C 1 60

41 Switching differential of the d.h.w. temperature 0...20 K (°C) 1 5 42 Legionella function

0 = OFF 1 = ON

0 / 1 - 1 1

43 setpoint of the legionella function 8...95 °C 1 65 44

Protection against discharging during d.h.w. heating

0 = no protection against discharging

1 = always protection against discharging

2 = protection against discharging only when heat generation is locked

0...2 - 1 2

Cascade settings OEM

50 cascade management strategy

1 autonomous 1 2 autonomous 2 3 autonomous 3 4 linked 1 5 linked 2 6 linked 3

1...6 - 1 2

51 Lower limit of output range (Pmin) 0...Pmax % 1 40 52 Upper limit of output range (Pmax) Pmin...100 % 1 90 56 Mandatory time on basic stage when boilers are added 10...1200 s 10 60 60 Minimum temperature differential at the pressureless

header

0...20 K (°C) 1 4

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Line Function Range Unit Resolution Factory

setting

Configuration of plant

90 continuous display

0 Weekday / time of day 1 Actual value of cascade flow temperature

0 / 1 - 1 0

Service values OEM

91 software version 00.0...99.9 - 1 92 device operating hours 0...500000 h 1 -

If a BMU is connected via LPB, this setting will not be active.

The respective setting is to be made directly on the BMU.

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2.7 Operation

Operating instructions are inserted at the rear of the unit's front cover.

2379Z01

2.7.1 Operating elements

erating element

unction

Room temperature setpoint knob

Adjustment of room temperature setpoint

Setting buttons

Parameter settings

Line selection buttons

Selection of parameters / switching of lines

Display

Readout of actual values and settings

Operating mode buttons

Operating mode changes to:

Automatic operation

continuous operation

Standby

D.h.w. heating ON / OFF

Function button with LED for manual operation

Manual operation ON / OFF

Connection facility for PC tool

Diagnostics and service

a) Symbols for indicating the operational status with the black bars (level pointers)

When the ECO function is active, the current level pointer flashes.

b) Display during normal control mode or when making settings c) Programming line when making settings. d) Time bar for normal control mode or when making settings.

Introduction

Display

2379Z02B

812162024

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2.8 Operational faults

2.8.1 No display on the controller:

• Is the heating plant's main switch turned on?

• Are the fuses in order?

• Check the wiring

2.8.2 Controller displays the wrong time of day:

• Set the correct time of day on the controller (operating line 1).

• Set the correct time of day on the clock master (if present).

2.8.3 One of the BMUs does not switch on

• Does the BMU really have to operate? (Check cascade lead strategy, delayed

switching on?)

• Press BMU's lockout reset button.

• Check the electromechanical control thermostat (TR) and the manual reset safety

limit thermostat (STB)

• Check wiring and fuse of the BMU.

• Check communication link to the BMU (operating line 54)

• Check wiring of the cascade temperature sensors (sensor test, operating line 52).

2.8.4 One of the pumps does not run

• Is the right type of plant displayed (operating line 53)?

• Is the pump correctly defined? (Operating line 95)

• Check wiring and fuse of the pump (relay test, operating line 51)

• Check wiring of the sensors (sensor test, operating line 52)

2.8.5 D.h.w. is not being heated:

• Has the button for d.h.w. heating been pressed?

• Check setpoint of the d.h.w. temperature

• Check if d.h.w. heating is released

• Check wiring and fuse of the charging pump (relay test, operating line 51)

• Check wiring of the d.h.w. temperature sensor (sensor test, operating line 52)

• Check setting of the electromechanical control thermostat (TR) installed on the

boiler. It must be above the TKmax setting

2.8.6 The room temperature does not agree with the

required temperature level:

• Does the room temperature setpoint agree with the required temperature level?

(Knob on the controller or on the room unit)

• Is the required operating mode indicated?

• Are weekday, time of day and the displayed heating program correct?

(Operating lines 1...11)

• Has the heating curve slope been correctly set? (Operating line 17)

• Check wiring of outside sensor (operating line 52)

• Has the ”Setting knob for the nominal room temperature setpoint” with the ”Parallel

displacement of the heating curve” (operating line 100) been calibrated based on the effective room temperature?

2.8.7 Error message; display shows "ER"

• Select operating line 50 which gives you the error code and error address. There,

you see the error code and the address of the error. Refer to section "Indication of errors" for a list of the possible error codes and their descriptions.

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3 Description of the enduser settings

User interface

3.1 Heating circuit operating modes

• Straightforward selection of heating circuit operating modes

The control provides 3 different heating circuit operating modes that can be directly selected as required.

Select the required operating mode by pressing the respective operating mode button. It is located on the controller front for direct access by the user.

Operating

mode

Designation Effect of selected operating mode

Automatic operation

• Heating according to the time program

(operating lines 5 to 11)

• Temperature setpoints according to the heating

program

• Protective functions active

• Changeover on the room unit active

• Automatic summer / winter changeover and

automatic 24-hour heating limit active (ECO

functions) continuous operation

• Heating mode with no time program

• Temperature adjustment with the setpoint knob

• Protective functions active

• Changeover on room unit inactive

• Automatic summer / winter changeover and

automatic 24-hour heating limit inactive (ECO

functions) Standby

• Heating OFF

• Temperature according to frost protection

• Protective functions active

• Changeover on room unit inactive

Benefit

Description

Setting

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The selected operating mode is indicated by illuminated buttons. A number of functions can cause the displayed selection to change. The following table shows the possible statuses. The following table shows the possible statuses:

Function Effect on button and meaning

Heat generation lock Line 170 = 3

• Selected HC operating mode button flashes when

contact H1 is closed

• D.h.w. operating mode button flashes when

switched on Changeover of operating mode Line 170 = 0

• Selected HC operating mode button

flashes

when contact H1 is closed

• D.h.w. operating mode button flashes when

switched on Changeover of operating mode Line 170 = 1

• HC operating mode

flashes

• D.h.w. operating mode button will not be affected

Minimum setpoint of flow temperature Line 170 = 2

• Selected HC operating mode button flashes when

contact H1 is closed.

• D.h.w. operating mode button will not be affected

Central standby switch Line 147 = 1

• HC operating mode

flashes

• D.h.w. operating mode button will not be affected

Function Effect on button and meaning

Occupancy button

• HC operating mode

flashes when occupancy

button is active.

• D.h.w. operating mode button will not be affected

Holiday function

• HC operating mode

flashes when holiday

function is active

• D.h.w. operating mode button flashes when

switched on

Changeover of the operating mode on the room unit is active only if the controller is in automatic mode

. The room temperature is transmitted to the controller via PPS, independent of the selected operating mode.

3.2 Operating mode of d.h.w. heating

• Selection of d.h.w. heating mode independent of heating operation

• Selection is made directly on the user interface

D.h.w. heating can be switched on and off independent of the other operating modes.

D.h.w. heating is selected by pressing the respective button on the controller's user interface.

Illuminated buttons

Settings on the controller

Settings on the room unit

Effect of room unit

Benefit

Description

Setting

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By pressing the respective button, d.h.w. heating is switched on or off.

• D.h.w. heating OFF - button dark.

D.h.w. is not being heated. Frost protection remains active, however, and prevents the storage tank temperature from falling below a certain level

• D.h.w. heating ON - button illuminated.

The d.h.w. is heated according to the settings made

The following settings affect d.h.w. heating:

• Time switch program d.h.w. heating (lines 29...35)

• Nominal d.h.w. temperature setpoint (line 13)

• Reduced d.h.w. temperature setpoint (line 120)

• Release of d.h.w. heating at the nominal setpoint (line 121)

• Assignment of d.h.w. heating (line 123)

• D.h.w. heating (line 124)

• Type of d.h.w. demand (line 125)

The d.h.w. values that can be adjusted on the controller apply to both d.h.w. heating by the controller and d.h.w. heating by a BMU supplied by Landis & Staefa. Some BMUs of other manufacture also support this function.

3.3 Nominal room temperature setpoint

• Straightforward setting of the required nominal room temperature setpoint

The heating system uses 3 different setpoints that can be adjusted:

• The nominal room temperature setpoint described here

• The reduced room temperature setpoint (setting on line 14)

• The frost protection setpoint of the room temperature (setting on operating line 15)

The nominal room temperature setpoint is preadjusted with the setpoint knob. It is located on the controller front for direct access by the user.

Setting range Unit Factory setting

8...26 °C 20

0 2 4 6 8 10 12 14 16 18 20 22 24 26

°C

2379Z17

Room temperature setpoint setting ranges

14 Setting "Reduced room temperature setpoint” 15 Setting "Frost protection setpoint of the room temperature”

When the nominal room temperature setpoint is active, the rooms will be heated according to the adjustment made with the setpoint knob. Effect in the various operating modes:

Effect

Important settings

 Note

Benefit

Description

Setting

Effect of temperature setting

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Operating

mode

Effect of knob adjustment

Adjustment

acts on the heating periods

Adjustment acts continuously

Adjustment has no effect

The adjustment made with the setpoint knob has priority over the reduced room temperature setpoint entered (line 14). Especially in a situation when the adjustment made with the knob is lower.

During the heating periods, the nominal room temperature setpoint is maintained. The heating periods are in accordance with the settings made on lines 6 to 11.

0 2 4 6 8 10 12 14 16 18 20 22 24

...

2373Z11

When using a room unit without setpoint readjustment (QAA50), the setpoint knob on the controller acts as described above. When using a room unit featuring setpoint readjustment (QAA70), the setpoint knob on the controller is inactive. In that case, the nominal setpoint adjusted on the room unit applies. A connected room unit is active only when operating mode

is selected on the

controller.

3.4 Manual operation

• Partly manual heating operation

In operating mode “Manual operation”, the plant components on the consumer side must be manually adjusted and monitored. The control functions of the unit are only used for controlling the BMUs.

The BMUs are released and use their boiler temperature sensor to control the temperature at the level of the maximum limitation of the BMU setpoint (TKmax.) Factory setting 80 °C. The actual boiler temperatures are displayed on setting line 55.

Activation:

Manual operation is activated by pressing this button. It is accessible only when the cover of the controller is open

Deactivation:

• By pressing one of the operating mode buttons

• By pressing again the manual operation button

When deactivating the function, the controller will automatically return to the operating mode previously selected.

As soon as manual operation is selected, all relays will switch to the following statuses:

Note

Example

Room unit

Benefit

Description

Common flow temperature

Setting

 Note

Effect

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Output

Terminals Status

BMU PPS All boilers released, fixed

heat demand at TKmax Heating circuit or system pump:

Q1 ON (uncontrolled)

D.h.w. charging pump Q3 ON (uncontrolled)

TKmax = maximum limitation of BMU setpoint (operating line 2

OEM

)

Common flow temperature (cascade flow temperature):

812162024

2379Z02

Display

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Setting the clock

• Straightforward changeover from summer- to wintertime, and vice versa

• Fast and easy-to-understand time settings

To ensure proper operation of the heating program, the 24-hour time switch with the time of day and weekday must be correctly set.

The time of day can be set from a remote location via the bus system, provided clock operation is appropriately set. Also refer to clock operation on operating line 148.

3.5 Time of day

1. Press the operating line selection buttons to select line 1.

2. Press the + / - buttons to set the time of day.

Setting range Unit

00:00...23:59 Hour : Minute

The controller's clock time is set in agreement with the correct time. This setting is important to make certain the controller’s heating program will operate correctly.

• During the setting procedure, the clock continues to run

• Each time the + or - button is pressed, the seconds are reset to zero

3.6 Weekday

1. Press the operating line selection buttons to select line 2.

2. Press the + / - buttons to select the weekday.

Setting range Unit

1...7 Weekday

The time of day will be set to the selected weekday. This setting is important to make certain the controller’s heating program will operate correctly.

1 = Monday 2 = Tuesday 3 = Wednesday 4 = Thursday

5 = Friday 6 = Saturday 7 = Sunday

Benefit

Description

System time

Setting

Effect

 Notes

Setting

Effect

Weekday table

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3.7 Date (day, month)

Setting range Unit

01:01...31:12 Day month

Day and month of the controller will be based on this setting. This setting of date is important to make certain the controller’s holiday program and summer- / wintertime changeover will operate correctly.

3.8 Year

Setting range Unit

1999...2099 Year

The year of the controller will be based on this setting. This setting of year is important to make certain the controller’s holiday program and summer- / wintertime changeover will operate correctly.

Setting

Effect

Setting

Effect

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Time switch program for space heating

• The heating system operates only if there is demand for heat.

• The user can set the heating periods to suit his lifestyle.

• Energy can be saved by making adequate use of the heating program.

The time switch program for space heating consists of the switching times that can be entered for the weekdays or the 7-day block. The time switch program for space heating and the time switch program for d.h.w. heating operate independently of one another.

3.9 Preselecting the weekday

With this setting, you select the weekdays or the 7-day block for which the switching times of the time switch program apply.

The heating program thus set becomes active when selecting automatic mode

1. Press the operating line selection buttons to select line 5.

2. Press the + / - buttons to preselect the 7-day block or the individual day.

Setting range Unit

1-7

1...7

7-day block Individual days

• This setting must be made before the switching times are entered!

• For every day on which other switching times shall apply, the preselection of the

individual day with subsequent entry of the switching times must be repeated

This setting is used to select either the whole week (1-7) or individual days (1...7).

7-day block

Entry of the switching times from operating line 6 to 11 is identical for every day from Monday through Sunday.

0 2 4 6 8 10 12 14 16 18 20 22 24

...

2373Z11

Switching time for nominal setpoint Switching time for reduced setpoint

Benefit

Description

Setting

Important

Effect

Entry of 1-7

Example:

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Individual days

The setting of the switching times from operating line 6 through 11 is entered only for the individual day selected here.

 Tip

First, choose the 7-day block (1-7) to enter the switching times that apply to the majority of days; then, select the individual days (1...7) to make the required adjustments.

0 2 4 6 8 10 1 2 1 4 16 18 20 2 2 2 4 h

237 3Z12

3.10 Switching times

With this setting, you determine the switching times for space heating. At these switching times, the temperature setpoints of the heating circuit change. The heating program thus set becomes active when selecting automatic mode

1. Press the line selection buttons to select line 6 to 11.

2. Press the + / – buttons to set the switching time on each line.

Setting range Unit Factory setting

- -:- -...24:00 h : min

See "Program overview" below

First, select the weekday (operating line 5) for which the switching times shall be entered!

The controller then makes a check to ensure the entries have been made in the correct order.

At the times entered, the program will switch to the respective temperature setpoints. The table below shows at what times the setpoints will be activated.

Entry of 1...7

Example:

Description

Setting

• • •

! Important

 Note

Effect

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Entry: – – : – – Switching point inactive

00:00...24:00 At the time entered, heating to the respective temperature is ensured.

Line

Switching point Temperature setpoint Standard

Switch-on time period 1 Setpoint of knob

06:00

Switch-off time period 1 Reduced setpoint

22:00

Switch-on time period 2 Setpoint of knob

– – : – –

Switch-off time period 2 Reduced setpoint

– – : – –

Switch-on time period 3 Setpoint of knob

– – : – –

Switch-off time period 3 Reduced setpoint

– – : – –

When using a QAA70 room unit, the heating program will be acted upon. However, this works only if operating mode “AUTO” is selected on the controller.

Program overview

Effect of room unit

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D.h.w. values

3.11 Nominal d.h.w. temperature setpoint

• D.h.w. heating only if there is a demand for it

• Possibility of using 2 different d.h.w. temperature setpoints

1. Press the operating line selection buttons to select line 13.

2. Press the + / – buttons to adjust the nominal setpoint of the d.h.w. temperature.

Setting range Unit Factory setting

TBWR...TBWmax °C 55

TBWR Reduced setpoint of d.h.w. temperature (setting on operating line 120) TBWmax Maximum nominal setpoint of d.h.w. temperature (setting on line 40

OEM

)

0 10 20 30 40 50 60 70 80 90 100 120 130 140 °C

2379Z16

The temperature setpoint during normal d.h.w. operation will be changed.

13 Setting "Nominal setpoint of the d.h.w. temperature” 120 Setting "Reduced setpoint of the d.h.w. temperature” 40

OEM

Setting "Maximum nominal setpoint of the d.h.w. temperature”

D.h.w. heating has 2 different setpoints that can be used:

• Nominal d.h.w. temperature setpoint: It ensures the d.h.w. temperature required

during main occupancy times

• Reduced d.h.w. temperature setpoint (setting on operating line 120): it ensures the

d.h.w. temperature required during the main occupancy times.

The criteria required for releasing d.h.w. heating are defined by the settings made on lines 121 and 123 and 124.

In the event of a sensor with a short-circuit (display ”- - -” in input test, test step 1) the d.h.w. will not be heated (protection against scalding).

Benefit

Setting

Effect

D.h.w. temperature setpoints

D.h.w. charging

 Note

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Heating circuit values

3.12 Reduced room temperature setpoint

• Lower room temperatures during non-occupancy times, e.g. during the night

• Energy savings

The heating system has 3 different setpoints that can be adjusted:

• The reduced room temperature setpoint described here.

• The nominal room temperature setpoint (to be adjusted with the setpoint knob).

• The frost protection setpoint of the room temperature (setting on operating line 15)

1. Press the operating line selection buttons to select line 14.

2. Press the + / – buttons to adjust the reduced room temperature setpoint.

Setting range Unit Factory setting

TRF...TRN °C 16

TRF Frost protection setpoint of the room temperature (setting on line 15)

TRN Nominal room temperature setpoint (to be adjusted with the setpoint knob)

If the required temperature level cannot be set, the adjustment made with the setpoint knob may be too low. It is not possible to set a value above the adjustment made with the setpoint knob.

0 2 4 6 8 10 12 14 16 18 20 22 24 26

°C

2379Z17

Room temperature setpoint setting ranges

14 Setting "Reduced room temperature setpoint ” 15 Setting "Frost protection setpoint of the room temperature”

With this setting, the reduced room temperature setpoint will change to the level called for by reduced operation

in the living rooms.

0 2 4 6 8 10 12 14 16 18 20 22 24

...

2373Z11

The heating periods are in accordance with the settings made on lines 6 to 11.

Benefit

Description

Setting

 Note

Effect

Example

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3.13 Frost protection setpoint of the room

temperature

• Protects the building against frost

This function is ensured only when the heating plant operates properly!

This function prevents the room temperature from falling below the adjusted frost protection setpoint.

1. Press the operating line selection buttons to select line 15.

2. Press the + / – buttons to adjust the frost protection setpoint of the room

temperature.

Setting range Unit Factory setting

4...TRRw °C 10

TRRw Reduced room temperature setpoint (setting on operating line 14)

This setting will change the frost protection setpoint of the room temperature.

In operating mode

, the room temperature is prevented from falling below a certain

level. This means that the frost protection setpoint of the room temperature

will be

maintained.

0 2 4 6 8 10 12 14 16 18 20 22 24 26

°C

2379Z17

Room temperature setpoint setting ranges

14 Setting "Reduced room temperature setpoint” 15 Setting "Frost protection setpoint of the room temperature”

3.14 Summer / winter changeover temperature

of the heating circuit

• Fully automatic operation throughout the year

• The heating will not be switched on when the outside temperature drops for short

periods of time

• Additional savings function

The summer / winter changeover temperature is the criterion for automatic summer / winter changeover of the heating plant.

Benefit

Caution

Description

Setting

Effect

Frost protection for the building

Benefit

Description

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1. Press the operating line selection buttons to select line 16.

2. Press the + / – buttons to select the summer / winter changeover temperature.

Setting range Unit Factory setting

8...30.0 °C 17

By changing the setting, the respective periods of time will be shortened or extended. The change will only affect the heating circuit. Entry: Increase: Winter operation will start earlier

Summer operation will start later .

Decrease: Winter operation will start later

Summer operation will start earlier

The summer / winter changeover temperature can act either locally or on other devices in the system (also refer to section "Effect of summer / winter changeover temperature") (Also refer to "Effect of automatic summer / winter changeover" on operating line 91).

• This function only acts in automatic mode

and standby mode .

• Level cursor flashes during summer operation.

To determine changeover, the setting of the summer / winter changeover temperature ( ± a fixed switching differential) is compared with the attenuated outside temperature. Also refer to page 64.

Heating OFF (from winter to summer)

TAged > SoWi + 1°C

Heating ON (from summer to winter)

TAged < SoWi - 1°C

SoWi

TAged

°C

OFF

2379D06

SoWi

+1 °C

SoWi

-1 °C

501015

Changeover between summer and winter operation:

TAged Attenuated outside temperature SoWi Summer / winter changeover temperature T Temperature t Time in days H Heating

Setting

Effect

 Notes

Changeover

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3.15 Heating curve slope

• Constant room temperature in spite of outside temperature variations

• Generation of a flow temperature with no external demand for heat

The controller generates the flow temperature setpoint as a function of the selected heating curve. For plants where the controllers cannot transmit their demand for heat via LPB or input H1, the controller can generate a weather-compensated flow temperature.

1. Press the operating line selection buttons to select line 17.

2. Press the + / - buttons to select the heating curve slope or - - . - einstellen.

Setting range Unit Factory setting

- : - - / 2.5...40.0 Increment 15.0

By changing the setting, the slope of the heating curve will be increased or decreased with the following effects:

Increase: The flow temperature will be raised when the outside temperature drops

Decrease: The flow temperature will be raised less when the outside temperature drops

The following settings produce the following effects:

2.5...40.0 The controller delivers a weather-compensated flow temperature.

- - : - The controller delivers no weather-compensated flow temperature.

To release heat generation, an external heat demand signal is required. Frost protection for the plant is active, but not frost protection for the building. The settings and the display on the room unit are also deactivated.

The setting of the heating curve slope (value from 2.5 to 40 or inactive - - - ) affects the automatic generation of plant type (operating line 53).

An external demand for heat can be delivered to the controller via LPB (LPBcompatible controllers) or input H1 (controllers of other manufacture). If several signals are present, the controller will use the highest of them as the setpoint.

Using the heating curve, the controller generates the flow temperature setpoint, enabling the system to maintain a constant room temperature even without using a room temperature sensor. The steeper the slope of the heating curve, the higher the flow temperature setpoint at low outside temperatures. Comfort is considerably enhanced when using a room temperature sensor.

Benefit

Description

Setting

Effect

 Notes

The heating curve

 Note

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20 10 0 -10 -20

-30

°C

27,5 25 2 2,5

17,5

12,5

7,5

2,5

100

2000D07

TV Flow temperature TA Composite outside temperature

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Actual values

• Display of the actual room temperature

• Display of the actual outside temperature

All displays of actual values require the respective temperature detectors.

3.16 Actual value of the room temperature

1. Press the operating line selection buttons to select line 18.

2. No setting can be made with the + / - buttons.

Display Unit

0...50 °C °C

The temperature measured with the room unit will automatically be displayed on this line.

– – –

Sensor with open-circuit or no room sensor connected

0 0 0 Sensor with short-circuit

3.17 Actual value of outside temperature

1. Press the operating line selection buttons to select line 19.

2. No setting can be made with the + / - buttons.

Display Unit

- 50... + 50 °C

The temperature measured with the outside sensor will automatically be displayed on this line.

– – –

Sensor with open-circuit or no sensor connected

0 0 0 Sensor with short-circuit

For resetting the attenuated outside temperature to the actual room temperature, refer to page " Attenuated outside temperature".

Benefit

Note

Setting

Effect

Special displays

Setting

Effect

Special displays

Note

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Maintenance

3.18 Standard time switch program for heating

circuit and d.h.w.

• Straightforward resetting of all time switch programs to their standard values

The standard time program resets the time settings of all time switch programs. For this purpose, the controller is supplied with non-volatile factory settings.

1. Press the operating line selection buttons to select line 23.

2. Press the + / - buttons for 3 seconds. The standard time program is activated as soon as the display changes to 1.

Display Unit

0 / 1 -

In that case, the individual settings will be lost!

The time settings for the time switch programs will be overwritten with standard values. This applies to the following settings:

• Switching times of time switch program "heating circuit"

...

• Switching times for d.h.w. program

...

Switching point

Setting line

Heating circuit D.h.w.

Standard time

Period 1 ON 6 30 06 : 00

Period 1 OFF 7 31 22 : 00

Period 2 ON 8 32 – – : – –

Period 2 OFF 9 33 – – : – –

Period 3 ON 10 34 – – : – –

Period 3 OFF 11 35 – – : – –

Benefit

Description

Setting

! Caution

Effect

Standard values

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Time switch program for d.h.w. heating

• D.h.w. is heated only if required.

• The user can set the d.h.w. heating times to suit his lifestyle.

• Energy can be saved by making adequate use of the time switch program

The time switch program for d.h.w. consists of the switching times to be entered for the weekdays or the 7-day block. The time switch program for d.h.w. and the time switch program for space heating operate independently of one another. The time switch program is active only when, on operating line 121 (d.h.w. program), setting 2 has been selected.

3.19 Preselecting the weekday

With this setting, you define the weekdays or the 7-day block for which the switching times of the d.h.w. time switch program apply.

The time switch program thus set is activated by pressing the d.h.w. operating mode button

1. Press the operating line selection buttons to select line 29.

2. Press the + / - buttons to preselect the 7-day block or the individual day.

Setting range Unit

1-7

1...7

7-day block Individual days

• This setting must be made before the switching times are entered!

• For every day on which other switching times shall apply, the preselection of the

individual day with subsequent entry of the switching times must be repeated

This setting is used to select either the whole week (1-7) or individual days (1...7). Entry: 1-7 7-day block: Entry of the switching times on lines 30 to 35 is identical for every

day from Monday through Sunday

1...7 Individual days: Entry of the switching times on lines 30 to 35 is made only for the individual day selected here

The principle is the same as that used with "Time switch program space heating" (refer to the diagrams and tips on page 39).

3.20 Switching times

This is the setting of the switching times for d.h.w. time switch program at which the d.h.w. temperature setpoint will change. The time switch program thus set is activated by pressing the d.h.w. operating mode button

Benefit

Description

 Important

Description

Setting

Important

Effect

Example:

Description

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1. Press the line selection buttons to select line 30 to 35.

2. Press the + / – buttons to set the switching time on each line.

Setting range Unit Factory setting

- -:- -...24:00 h : min

See "Program overview" below

First, select the weekday for which the switching times shall be entered!

The controller then makes a check to ensure the entries have been made in the correct order.

At the times entered, the program will switch to the respective temperature setpoints. The table below shows at what times the setpoints will be activated. Entry:

– : – – Switching point inactive

00:00...24:00 At the time entered, the d.h.w. will be heated to the respective

temperature.

Line

Switching point D.h.w temperature setpoint Standard

Switch-on time period 1

Nominal setpoint

06:00

Switch-off time period 1

Reduced setpoint

22:00

Switch-on time period 2

Nominal setpoint

– – : – –

Switch-off time period 2

Reduced setpoint

– – : – –

Switch-on time period 3

Nominal setpoint

– – : – –

Switch-off time period 3

Reduced setpoint

– – : – –

Setting

• • •

! Important

 Note

Effect

Program overview

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Service .

3.21 Displaying the BMU error code

• Straightforward checking of plant.

• Fault tracing is made easier.

For each BMU, the RVA47.320 can log and store one fault status signal with the associated BMU number and error code. The faults are indicated on this operating line.

1. Press the operating line selection buttons to select operating line 49.

2. Press the + / - buttons to interrogate the individual BMUs.

Display Unit

1...4 / 0...255

BMU number / error code

The number of the lowest connected BMU number containing a fault entry will automatically be displayed on this line.

Error messages cannot be acknowledged. They disappear only if the appropriate fault has been rectified.

The display shows the BMU number and the associated error code. When none of the BMUs delivers a fault status signal, or when no BMU is connected, there will be no display. The meaning of the different error codes depends of the make of BMU used. For this reason, no overview of all the different error codes can be given here. For details, please refer to the technical documentation of the relevant product.

812162024

2379Z02

BMU 1 signals error code 1.

If there is a BMU error code, operating line 50 also displays a general BMU error (error

code 150).

Benefit

Description

Setting

Effect

 Note

Display

Example:

Note

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3.22 Indication of faults

• Straightforward checking of plant

• Fault tracing is made easier

The controller indicates faults that may have occurred in the controller itself or in the system. The display shows "Er" if an error has occurred.

1. Press the operating line selection buttons to select line 50.

2. Press the + / - buttons to display the list of faults.

Display Unit

0...255 -

The first entry in the error list will automatically be displayed on this operating line. By pressing

, it is possible to switch between error signals.

The controller can store a maximum of 2 error signals. The error signal will be cleared only after the cause of the fault has been removed. If additional errors are present, they will be stored as soon as storage capacity becomes available. Errors that may occur locally on this device:

Display Description of error

Blank No error

10 outside temperature sensor

26 Cascade flow temperature sensor

46 Cascade return temperature sensor

50 D.h.w. temperature sensor

58 D.h.w. thermostat

61 Fault room unit

70 Buffer storage tank temperature sensor

81 Short-circuit LPB

82 Address collision on LPB (same address several times)

86 Short-circuit PPS

100 2 clock masters present

145 Wrong device connected to PPS

146 Inadmissible plant configuration

147 No BMU connected

150 General BMU fault

In the case of error code 150, operating line 49 also gives the manufacturer-specific error code of the BMU.

Benefit

Description

Setting

Effect

Note

Error signals

Device errors

 Note

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Other devices that are faulty and whose faults are signaled:

Display Description of error

Example:

26.0.01

Fault with address of the faulty device

- The first digit gives the error code (26).

The second digit indicates the segment address of the faulty device (.01).

(for the segments 10-14, the letters A, b, C, d, and E are used)

The third digit indicates the device address of the faulty device (.01).

Example of a display after an error has occurred:

812162024

2379Z02

Faulty devices

Display

“Er” indicates that a fault has occurred.

dditional faults can be displayed by pressing

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4 Description of the heating engineer

settings

Service values

4.1 Output test

• Connections can be checked prior to commissioning

• Faults can be traced much faster

Also termed relay test, which is used to check the wiring and the configuration.

1. Press the operating line selection buttons to select operating line 51.

2. Press the + / - buttons to run through the output test.

Setting range Unit Factory setting

0...3 Increment 0

The output test will automatically become available on this operating line. With each test step, the respective output will be activated so that it can be checked.

The test sequence is arranged in the form of a ring counter. This means it can be run through either forward or backward by pressing the + / - buttons.

Test step 0 All outputs are switched according to actual control operation

Test step 1 All outputs are deactivated

Test step 2 D.h.w. charging pump (Q3) is activated

Test step 3 Heating circuit or system pump (Q1) is activated.

For additional information, refer to section "Commissioning”.

4.2 Input test

• Commissioning is facilitated

• Faults can be traced much faster

Also termed detector test, which is used to check the wiring and the configuration.

1. Press the operating line selection buttons to select operating line 52.

2. Press the + / - buttons to run through the input test.

Setting range Unit Factory setting

0...5 Increment 0

The input test will automatically become available on this operating line. With each test step, the respective input will be displayed so that it can be checked.

The test sequence is arranged in the form of a ring counter. This means it can be run through either forward or backward by pressing the + / - buttons.

Benefit

Description

Setting

Effect

Test sequence

Note

Benefit

Description

Setting

Effect

Test sequence

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Test step 0 Display of the function (B70/B4) [°C] selected on operating line 97.

Test step 1 Display of the d.h.w. temperature (B3).

Test step 2 Display of the cascade flow temperature (B10).

Test step 3 Display of the actual outside temperature (B9)

Test step 4 Display of room temperature acquired with room unit connected to

Test step 5 Display of input H1 according to the function selected on operating

line 170 [°C, - - - , o o o].

For additional information, refer to section "Commissioning”.

– – –

Sensor with open-circuit or no sensor connected

0 0 0 Sensor with short-circuit

4.3 Display of plant type

• Plant structure is easy to understand

• Straightforward checking of configuration

Displays the plant type used.

1. Press the operating line selection buttons to select operating line 53.

2. No setting can be made with the + / - buttons.

Display Unit

0, 27...36, 65...67

The number of the current plant type will automatically be displayed on this line. 0 Invalid configuration of plant

27...36, Valid configuration of plant

65...67 Based on the connected peripheral devices and parameter settings, the controller ascertains the current plant type. The plant type is displayed in the form of a number which corresponds to the plant diagram. For the graphic illustration of the various plant types, refer to chapter "Application".

The following factors have an impact on the generation of the type of plant:

- Connection of a d.h.w. temperature sensor:

The controller identifies a connected d.h.w. temperature sensor and also whether it is connected directly to the controller or to one of the BMUs.

- Setting of operating line "Type of d.h.w. demand" (line 125)

Based on this setting, the controller knows whether the d.h.w. is heated by means of a temperature sensor or control thermostat.

- Selection of pump connected to output Q1 (operating line 95)

- Adjustment of heating curve (operating line 17) (- - : - or value between 2.5 and 40)

 Note

Special displays

Benefit

Description

Setting

Effect

Plant type

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The following table contains the setting combinations that lead to the required types of plant:

Plant type-

number

(operating

line 53)

Slope of

heating curve

(operating line

17)

Pump function

(output Q1)

(operating line 95)

Type of d.h.w. demand

(operating line 125)

D.h.w. sensor

connected to:

BMU RVA

27 --- heating circuit pum

temperature No No

27 x D.h.w. circulating pum

temperature No No

28 --- heating circuit pum

temperature x

28 --- heating circuit pum

Control x No

28 x D.h.w. circulating pum

temperature x

28 x D.h.w. circulating pum

Control x No

29 --- heating circuit pum

temperature

es No

29 x D.h.w. circulating pum

temperature

es No 30 x Primary pump for d.h.w. and temperature No No 30 x Primary pump for HCs onl

temperature No No

31 x Primary pump for d.h.w. and temperature x

es 31 x Primary pump for d.h.w. and Control x No 32 x Primary pump for HCs onl

temperature x

es 32 x Primary pump for HCs onl

Control x No

33 x Primary pump for d.h.w. and temperature

es No

33 x Primary pump for HCs onl

temperature

es No

34 2.5...40 heating circuit pum

temperature No No

35 2.5...40 heating circuit pum

temperature x

es 35 2.5...40 heating circuit pum

Control x No

36 2.5...40 heating circuit pum

temperature

es No 65 x Pump H1 temperature No No 66 x Pump H1 temperature x

es 66 x Pump H1 Control x No 67 x Pump H1 temperature

es No

x means that the setting has no influence on the generation of plant type.

If the heating curve is deactivated (setting ---), the controller requires an external heat demand signal to release the generation of heat. An external demand for heat can be transmitted to the controller via LPB (LPB capable controllers) or input H1. If several signals are present, the controller will use the highest of them as the setpoint.

The following settings are invalid, therefore producing fault message 58 (demand from thermostat, but sensor used):

Plant type-

number

Slope of heating

curve

Pump function

(output Q1)

Type of d.h.w.

demand

D.h.w. sensor

connected to:

BMU RVA

28 --- heating circuit pum

Control x

28 x D.h.w. circulating pum

Control x

31 x Primary pump for d.h.w. and Control x

32 x Primary pump for HCs onl

Control x

35 2.5...40 heating circuit pum

Control x

66 x Pump H1 Control x

x means that the setting has no influence on the generation of the type of plant.

combinations

 Note

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4.4 Displaying the PPS communication

• Interface for BMUs and digital room unit

• Checking the communication with the peripheral devices (BMUs, room unit)

PPS is a point-to-point interface for communication between controller, BMU and room unit. The display provides information about the communication status and the types of connected peripheral devices.

1. Press the operating line selection buttons to select operating line 54.

2. Press the + / - buttons to interrogate the various PPS users.

Display Unit

– – –

1...12 / 0...255 o o o

No communication PPS address / identification code Short-circuit of communication line

The status of the PPS communication will automatically be displayed on this line. If communication is error-free, the controller identifies the unit connected by displaying the identification number, in addition to the device address.

The display is comprised of PPS address and a device identification code.

Within the PPS, a fixed PPS address is assigned to some types of devices:

Room unit



BMU-Nummer 1



BMU-Nummer 2



BMU-Nummer 3



BMU-Nummer 4



These peripheral devices can only be operated under the respective PPS address. If one of these devices is not used, the PPS address can be allocated to some other peripheral device. Assignment of all the other peripheral devices to the PPS addresses can be made randomly. Since every controller has a specific and confined PPS address space, the same PPS addresses can be assigned to each device.

Benefit

Description

Setting

Effect

Displays

PPS-address

Note

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Only digital peripheral devices can be connected to the controller. Analog devices are not permitted. The digital devices transmit the controller an identification code in agreement with the type of device. The type of device can be identified with the help of the list given below.

82 Room unit QAA 50 (digital)

83 Room unit QAA 70 (digital)

90 Room temperature sensor QAA10 (digital)

102 BMU

• When the LCD displays a PPS address with an identification code, the

communication with the respective device is error-free

• When the LCD displays no PPS address and no identification code, there is no

communication or it is faulty

• Incompatible devices are also displayed, but produce error code 145 (operating line

50)

Identification code

 Notes

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Actual values

• Overview of the actual temperatures of the sensors used

• Better reproducibility of the control sequences thanks to visualized temperatures

4.5 Actual boiler temperature values of BMUs

(TKx)

1. Press the operating line selection buttons to select operating line 55.

2. Press the + / - buttons to interrogate the individual BMUs.

Display Unit

1...4 / 0...140 BMU number / °C

The lowest connected BMU number with the associated temperature will automatically be displayed on this line. The temperatures of the other cascaded heating boilers can be interrogated by pressing the + / - buttons. Non-existing BMUs will be skipped. The cascade boilers displayed are only those connected to this controller. If there are additional cascaded boilers, they will be displayed on the controllers to which they are physically connected.

In place of the temperature, the following displays can appear next to the BMU number: – – –

Sensor with an open-circuit or no sensor connected

0 0 0 Sensor with short-circuit

If the LCD displays – – – without giving an associated BMU number, there is no BMU connected to the controller.

4.6 Actual value of cascade flow temperature

When using several cascaded heat sources, a cascade flow temperature sensor (B10) must be installed. Also termed "Common flow temperature sensor”.

1. Press the operating line selection buttons to select operating line 56.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The temperature measured with the cascade flow temperature sensor (B10) will automatically be displayed on this line. In a cascaded system, a common cascade flow temperature sensor (B10) is used for all heat sources. The cascade temperature sensor (B10) is connected directly to the RVA47.320.

Benefit

Setting

Effect

 Note

Special displays:

 Note

Description

Setting

Effect

Cascade flow temperature sensor

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B10

B70

2379S27

B10 Cascade flow temperature sensor

– – –

Sensor with open-circuit, no sensor connected, or sensor incorrectly defined

0 0 0 Sensor with short-circuit

4.7 Actual value of the cascade return

temperature

When using several cascaded heat sources, we recommend to use a cascade return temperature sensor (B70). It is also termed "Common return temperature sensor”.

1. Press the operating line selection buttons to select operating line 57.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The temperature measured with the cascade return temperature sensor (B70) will automatically be displayed on this line. In a cascaded system, a common cascade return temperature sensor (B70) should be used for all heat sources. The value of this sensor is used for optimizing the controller’s functionality. In particular, it permits the detection of wrong mass flows (primary / secondary mass flow). The cascade return temperature sensor is connected directly to the RVA47.320.

Special displays

Description

Setting

Effect

Cascade return temperature sensor

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B10

B70

2379S27

B70 Cascade return temperature sensor

The meaning of the temperature measured at B70/B4 is defined by setting 1 (cascade return temperature sensor) on operating line 97.

– – –

Sensor with open-circuit, no sensor connected, or sensor incorrectly defined

0 0 0 Sensor with short-circuit

 Important

Special displays

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4.8 Actual value of buffer storage tank

temperature

When using alternative heat sources, the buffer storage tank temperature is used as a control criterion for the release of additional heat sources.

1. Press the operating line selection buttons to select operating line 58.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The actual temperature in the buffer storage tank (B4) will automatically be displayed on this line.

To be used as a buffer storage tank temperature sensor, input B70/B4 must be appropriately defined (operating line 97, setting 2) If input B70/B4 of the first cascade controller is already used by the optional cascade return temperature sensor B70, buffer storage tank temperature sensor B4 can be connected to input B70/B4 of the second controller.

4.9 Actual value of the d.h.w. temperature

(TBWx)

1. Press the operating line selection buttons to select operating line 59.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The temperature measured with the d.h.w. temperature sensor (B3) connected to the controller, or the d.h.w. temperature transmitted by the BMU via PPS will automatically be displayed on this line. With the type of d.h.w. demand ”Thermostat” (line 125), there will be no temperature display of course. The display shows ” --- ”. The input test (line 52, test step 1) provides information about the current switching status of the thermostat.

– – –

Sensor with open-circuit or no sensor connected

0 0 0 Sensor with short-circuit

Description

Setting

Effect

Important

 Note

Setting

Effect

 Note

Special displays

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4.10 Attenuated outside temperature

• Making use of the building’s thermal storage capacity

The attenuated outside temperature is the simulated room temperature of a fictive building that has no internal heat source. This means that it is only the outside temperature that affects the room temperature.

This operating line automatically displays the actual value [°C] of the attenuated outside temperature. No direct setting can be made. The generation of the attenuated outside temperature cannot be influenced.

Display Unit

-50...50 °C

It is possible, however, to reset the attenuated outside temperature:

1. Press the operating line selection buttons to select line 19.

2. Press the + / - buttons for 3 seconds. As soon as the display stops flashing, the attenuated outside temperature is reset to the actual outside temperature.

The attenuated outside temperature is generated by the controller. It is continually calculated based on the prevailing outside temperature. The factory setting is 0 °C. The attenuated outside temperature affects directly only the summer / winter changeover (setting 16). The attenuated outside temperature acts indirectly, via the composite outside temperature, on flow temperature control.

2371D11

18:00 06:00 06:00 18:0018:00

°C

TAakt

TAged

TAakt Actual outside temperature TAged Attenuated outside temperature

Benefit

Description

Setting

Resetting

Process

Effect

Example

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4.11 Composite outside temperature

• Compensating variable for the flow temperature control

The composite outside temperature is a mixture of the actual outside temperature and the attenuated outside temperature calculated by the controller.

This operating line automatically displays the actual value [°C] of the composite outside temperature. No direct setting can be made.

Display Unit

-50...50 °C

The mixture of actual and attenuated outside temperature is dependent on the type of building construction (setting 105) and is generated as follows:

Selected type of construction Composite outside temperature

Heavy (setting 105 = 0) Tagem = ½ TAakt + ½ TAged Light (setting 105 = 1) Tagem = ¾ TAakt + ¼ TAged

The composite outside temperature as a compensating variable acts on flow temperature control, that is thus matched to the prevailing weather conditions. It also acts on the 24-hour heating limit to shut down the heating.

2371D12

18:00 06:00 06:00 18:0018:00

TAakt

TAged

°C

TAgem1

TAgem0

TAakt Actual outside temperature TAged Attenuated outside temperature TAgem1 Composite outside temperature for light building structures TAgem0 Composite outside temperature for heavy building structures

Benefit

Description

Setting

Process

Effect

Example

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Setpoints .

4.12 Outside temperature source

• Display and location of actual outside temperature measurement

When interconnecting several controllers, only one outside sensor is required. This sensor will be connected to any of the controllers and delivers its signal via LPB. The controllers to which no sensor is connected adopt the outside temperature signal via the bus system, from a controller to which a sensor is connected.

1. Press the operating line selection buttons to select operating line 62.

2. No setting can be made with the + / - buttons.

Display Unit

– – . – –

00.01...14.16

No signal Segment and device address

The address of the outside detector that currently delivers the outside temperature signal will automatically be displayed on this line.

– – . – –

No outside sensor signal

01.02

Address of outside sensor The first 2 digits represent the segment number (01.) The second digit corresponds to the device number (.02)

If required (e.g. due to different exposure to solar radiation of the various buildings), the different sections of the system can be equipped with their own outside sensors. For more detailed information, refer to section ”Outside temperature source” of ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E).

4.13 Boiler temperature setpoint of BMUs

• Indication of BMU temperature setpoints

• Better overview of the plant’s operational status

The lowest connected BMU number with the associated temperature setpoint will automatically be displayed on this line. The temperature setpoints of the other BMUs used in the cascade can be interrogated by pressing the + / - buttons. Nonexisting BMUs will be skipped.

1. Press the operating line selection buttons to select line 65.

2. Press the + / - buttons to select the setpoint of the required BMU.

Display Unit

1...4 / 0...140 BMU number / °C

The setpoints can only be displayed but not changed. The function helps better understand the control sequences taking place in the controller. No setpoint is displayed (---), when

• there is no heat demand from the consumers

• no BMU is connected to the controller

Benefit

Description

Setting

Effect

Display

 Note

Benefit

Description

Setting

 Note

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4.14 Setpoint of the cascade flow temperature

• Indication of setpoint of the cascade flow temperature

• Better overview of the plant’s operating state

The setpoint of the cascade flow temperature will automatically be displayed on this line.

1. Press the operating line selection buttons to select line 66.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The setpoint can only be displayed, but not changed. The function helps better understand the control sequences taking place in the controller.

The setpoint displayed is generated based on the different heat demand signals received from the system. These are:

• Demand for heat from the controller’s internal heating circuits based on the outside

temperature

• Demand for heat from the external heating circuits (system) based on the outside

temperature

• Demand for heat for d.h.w. (from inside the controller or externally)

• Demand for heat via contact H1

• Demand for heat resulting from protective functions (e.g. frost protection for the

plant)

• Demand for heat by pressing the button for manual operation

The highest of the setpoints received is shown on the display as the setpoint of the cascade flow temperature.

The display shows ”---“ if one of the following points applies:

• There is no demand for heat

• The controller has been defined as a cascade controller (device address > 1)

• Sensor B10 has not been detected or connected

4.15 D.h.w temperature setpoint

• Visualization of the d.h.w. temperature setpoint

• Better overview of the plant’s operating state

The current d.h.w. temperature setpoint will automatically be displayed on this line.

1. Press the operating line selection buttons to select line 69.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The setpoint can only be displayed, but not changed.

The value displayed depends on the following parameters:

Benefit

Description

Setting

Generation of setpoint

 Note

Benefit

Description

Setting

Generation of setpoint

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• Current time of day (operating line 1)

• Time switch program d.h.w. heating (lines 29...35)

• Nominal setpoint of the d.h.w. temperature

(operating line 13)

• Reduced setpoint of the d.h.w. temperature

(operating line 120)

• Release of d.h.w. heating

(operating line 121)

• Assignment of d.h.w.

(operating line 123)

• d.h.w.frost protection (5°C)

• Number of the d.h.w. heating cycles per day (operating line 124)

• Legionella function ON / OFF (operating line 42

OEM

)

• Legionella setpoint (operating line 43

OEM

)

No value (---) is displayed in the following situations:

• No d.h.w. heating available

• D.h.w. heating is switched off (button for d.h.w. heating OFF)

4.16 Nominal room temperature setpoint

• Information about the nominal room temperature setpoint in normal operation

Displays the current nominal room temperature setpoint during the comfort period. The nominal room temperature setpoint is the temperature adjusted on the controller that shall be maintained in the rooms in normal operation (comfort).

1. Press the operating line selection buttons to select operating line 70.

2. No setting can be made with the + / - buttons.

Display Unit

0.0...35.0 °C

The nominal room temperature setpoint will automatically be displayed on this operating line.

The resulting nominal room temperature setpoint is made up of the adjusted setpoint and a readjustment that may have been made on the room unit:

• Without room unit

Adjustment made with the controller’s setpoint knob

= controller's nominal room temperature setpoint

• When using a room unit with no programming facility (e.g. QAA50)

Adjustment made with the controller’s setpoint knob + readjustment made on the room unit (± 3 °C)

= controller's nominal room temperature setpoint

• When using a room unit with a programming facility (e.g. QAA70)

Setpoint programmed with the room unit

+ readjustment made on the room unit (± 3 °C)

= controller's nominal room temperature setpoint

 In that case, the controller's setpoint knob is inactive.

 Note

Benefit

Description

Setting

Effect

Nominal room temperature setpoint

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1) Setpoints and readjustments made on room units are considered only in automatic

mode

4.17 Room temperature setpoint

• Information about the room temperature setpoint in the various operating modes

Displays the current room temperature setpoint during the respective heating period (normal operation / reduced operation).

1. Press the operating line selection buttons to select line 71.

2. No setting can be made with the + / - buttons.

Display Unit

0...35 °C

When selecting the operating line, the current room temperature setpoint is displayed, depending on the operating mode and the time switch program, that is, a selection / combination of the following parameters:

• Room temperature setpoint knob

• Reduced setpoint of room temperature (operating line 13)

• Frost protection setpoint of room temperature (operating line 15)

• Readjustments made on the room unit (QAA50 / QAA70)

If there is no heating circuit, the display shows ”---”.

4.18 Flow temperature setpoint

• Displays the current flow temperature setpoint of the pump heating circuit

When selecting this operating line, the current flow temperature setpoint of the controller’s internal pump heating circuit is displayed.

1. Press the operating line selection buttons to select line 72.

2. No setting can be made with the + / - buttons.

Display Unit

0...140 °C

The value displayed corresponds to the flow temperature of the pump heating circuit which is required for reducing the demand for heat.

The display shows ”---” in the following situations:

• No heating circuit available

• ECO function active (summer / winter changeover, automatic 24-hour heating limit)

• Quick setback active

• Room temperature limitation active

 Important

Benefit

Description

Setting

 Note

Benefit

Description

Setting

 Note

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Heat generation values

4.19 Existing boilers

• Overview of the boilers used by the system

The function makes it possible to obtain a quick overview of the boilers used by the system.

1. Press the operating line selection buttons to select line 75.

2. Press the + / - buttons to scroll through the list of available boilers.

Display Unit

00.1...16.3 -

The numbers have the following meaning:

00.1...16.3 Device address

and device subaddress (boiler number in a controller) of the boilers assigned to the system (max. 16). All boilers must be contained in segment 0 to ensure the demand for heat from all segments will be considered.

Do not mix up device / device subaddress and segment / device address! If the segment address was added, the display would read 0.00.1 ... 0.16.3.

A controller that uses device address 0

(e.g. 00.1) operates autonomously ( no communication via LPB). The device address 1

(01.1) defines the cascade master (controller).

Up to four BMUs can be connected to the first RVA47.320 (B-series) of a cascade, and up to three BMUs to each of the additional RVA47.320 (B-series). The possible device subaddresses are therefore 1.1 ... 1.4, 2.1 ... 2.3, 3.1 ... 3.3 through 16.3 One cascade can contain a maximum of 16 boilers, however.

For more detailed information, refer to ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E).

4.20 Display lead boiler

• Quick overview of current lead boiler

With ”Automatic lead boiler changeover”, this function facilitates quick identification of the current lead boiler.

When selecting this operating line, the current lead boiler is displayed. No settings can be made with the + / – buttons.

Display Unit

00.1...16.3 -

The numbers have the following meaning:

Benefit

Description

Setting

 Caution!

Device address

Device subaddress

Benefit

Description

Display

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00.1...16.3 Device address and device subaddress (boiler number in a controller) of the boilers assigned to the system (max. 16). All boilers must be contained in segment 0 to ensure the demand for heat from all segments will be considered.

Do not mix up device / device subaddress and segment / device address! If the segment address was added, the display would read 0.00.1 ... 0.16.3.

A controller that uses device address 0

(e.g. 00.1) operates autonomously ( no communication via LPB). The device address 1

(01.1) defines the cascade master (controller).

The setting for boiler sequence changeover is made on operating line 130. For more detailed information, refer to ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E).

4.21 Remaining number of operating hours for

changeover of boiler sequence

• Indication of the remaining number of operating hours until the next changeover of

boiler sequence takes place.

Indicates the number of hours the current lead boiler still operates until the next changeover of boiler sequence occurs.

When selecting this operating line, the remaining number of operating hours for changeover of the boiler sequence are displayed.

Display Unit

0...990 / --- h / -

The number displayed represents the number of operating hours until the next changeover of boiler sequence occurs. It is generated by subtracting the current number of operating hours from the setting made on operating line 130 (automatic changeover according to the number of operating hours). The display appears only if, on operating line 130, a setting of 10…990h has been selected (automatic changeover according to the number of operating hours). Otherwise, the display will show "- - -”.

 Caution!

Device address

Device subaddress

 Note

Benefit

Description

Setting

Display

 Note

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4.22 Burner operating hours BMU 1 – 4

• Overview of the number of burner operating hours of the individual BMUs

• Criterion for service and maintenance work

• Criterion for adjusting the cascade management strategy

The display shows the number of hours the respective BMU has been operating since the controller was first commissioned.

1. Press the line selection buttons to select lines 80 -83.

2. No setting can be made with the + / - buttons.

Display Unit

0...65535 h

The numbers have the following meaning: Line 80 Number of burner operating hours of BMU 1 Line 81 Number of burner operating hours of BMU 2 Line 82 Number of burner operating hours of BMU 3 Line 83 Number of burner operating hours of BMU 4

For information about the selection of the cascade management strategy, refer to operating lines 50

OEM

to 52

OEM

4.23 Minimum limitation of the boiler

temperature TKmin

• This function prevents the boiler temperature from falling below a predefined

minimum temperature.

Minimum limitation of the boiler temperature setpoint is a protective function for the boiler. In addition, minimum limitation of the setting range can be provided with the setting 01

OEM

1. Press the operating line selection buttons to select line 90.

2. Press the + / - buttons to set the minimum limitation of the boiler temperature TKmin.

Setting range Unit Factory setting

TKmin

OEM

...TKmax (max 95°C) °C 8

Tkmin

OEM

Minimum limitation of the boiler temperature setpoint (setting on line 01

OEM

)

Tkmax Maximum limitation of the boiler temperature setpoint (setting on line 02

OEM

)

0 10 20 30 40 50 60 70 80 90 100 120

max

min

akt

°C

2371Z22

Benefit

Description

Setting

 Note

Benefit

Description

Setting

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55 Actual value of the boiler temperature 90 Minimum limitation of the boiler temperature setpoint 2

OEM

Maximum limitation of the boiler temperature setpoint

OEM

Lowest minimum limitation of the boiler temperature setpoint

If the boiler temperature falls below the set minimum temperature, this setting generates a locking signal which reduces the amount of heat supplied to the consumers.

4.24 Nominal output of BMU 1 - 4

• Consideration is given to the different heat source capacities

By setting this paramter, the controller knows the proportion of capacities of the connected boilers and can take this into account with the running time strategy and the linked lead boiler operation (refer to page 114 ff.).

1. Press the line selection buttons to select lines 91 -94.

2. Press the + / - buttons to set the nominal capacities of BMUs 1 - 4.

Line BMU-Nr. Setting range Unit Factory setting

BMU1 0...255 kW 20

BMU2 0...255 kW 20

BMU3 0...255 kW 20

BMU4 0...255 kW 20

The controller only uses the proportions of the numbers entered. When having capacities of 100 / 150 / 70 kW, entry of the proportions of 10 / 15 / 7 or 20 / 30 / 14 will lead to the same result as entry of the absolute figures. Hence, capacities above 255 kW can also be entered by using the respective ratios.

This setting has an impact on the accuracy of the points in time the individual boilers are switched on and off (refer to boiler management and running time strategy, operating line 50

OEM

Autonomous lead boiler operation:

No effect

Linked lead boiler operation:

The lag boilers follow the lead boiler's output at different speeds, depending on the proportion of capacities of lead boiler and lag boilers.

Running time strategy 1 - 3: Additional boilers are switched on or off earlier or later, depending on the capcities of the individual boilers in sequence.

Effect

Benefit

Description

Settings

 Note

Effect

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Configuration of plant

4.25 Pump function output Q1

• Use of pump for different types of plant

This parameter defines the function provided by the pump connected to terminal Q1.

Setting of this function has an impact on automatic generation of the type of plant. Operating line 53.

1. Press the operating line selection buttons to select operating line 95.

2. Press the + / - buttons to select the required function of the circulating pump.

Setting range Unit Factory setting

1...5 - 1

The pump provides one of the following functions, depending on the setting made:

1 Circulating pump operates as a heating circuit pump of the controller-internal

pump heating circuit or no pump is available.

2 Circulating pump works as a system pump for the heating circuits only

(located after the d.h.w. storage tank).

3 Circulating pump works as a system pump for the heating circuits and

for the

d.h.w. (located before the d.h.w. storage tank). 4 Circulating pump operates as a d.h.w. circulating pump 5 Circulating pump operates as an H1 pump

Pump overrun is active with all settings, with the exception of setting 4.

4.26 Use sensor input B70/B4

• The same sensor input can be used for different functions

This parameter setting defines the function adopted by the temperature sensor connected to terminal B70/B4.

1. Press the operating line selection buttons to select operating line 97.

2. Press the + / - buttons to select the required function of the input B70/B4.

Setting range Unit Factory setting

1...2 - 1

Depending on the setting made, the sensor provides the following function:

1 The sensor is used for measuring the return temperature (B70).

2 The sensor is used for measuring the buffer storage tank temperature (B4).

If, with the first controller, sensor input B70/B4 is defined for use with a return temperature sensor (B70), for instance, it can be defined with another controller of the

Benefit

Description

 Note

Setting

Effect

Benefit

Description

Setting

Effect

Use in cascades

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cascade for use with a buffer storage tank temperature sensor (B4). The sensor values are automatically transmitted to the cascade master. Within a cascade, each type of sensor may occur only once (with the exception of the outside sensor).

When using input B70/B4 for a buffer storage tank temperature sensor (B4), the temperature measured at B4 is used to decide whether the consumers receive their heat from the cascade or from the buffer storage tank. If the temperature measured in the buffer storage tank is higher than the flow temperature called for by the consumers, the cascade will be locked and the consumers receive their heat from the buffer storage tank. If the temperature measured in the buffer storage tank is lower than the flow temperature called for by the consuemrs, the buffer storage tank will be locked and the consumers receive their heat solely from the cascade.

Example of a hydraulic circuit with a buffer storage tank. The buffer storage tank can be charged by any type of heat source (wood-fired boiler, solar collectors, heat pump, etc).

2379S37

B10

B70

SK = solar collectors

FK = solid fuel boiler

V = consumer

The changeover valve must be connected in parallel to the pump of the first BMU. This BMU must be excluded from automatic changeover of the boiler sequence (refer to operating line 131).

Use as a buffer storage tank temperature sensor

Example

Connection of diverting valve

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Heating circuit values

4.27 Parallel displacement of the heating curve

• Adjustment of controller's temperature scale to the actual plant conditions.

Produces a parallel displacement of the heating curve in order to achieve a better match of room temperature setpoints and actual room temperatures.

1. Press the operating line selection buttons to select operating line 100.

2. Press the + / – buttons to set the parallel displacement..

Setting range Unit Factory setting

-4.5...+4.5 °C (K) 0.0

By changing the value entered, all room temperature setpoints will be appropriately raised or lowered. This allows the room temperature setpoints to be matched to the effective room temperatures. If a nominal room temperature setpoint of 20 °C adjusted on the controller always produces a room temperature of 22 °C (independent of the prevailing outside temperature), displace the heating curve downward by 2 °C.

Each setpoint readjustment, be it by changing the setting value or the operational level, corresponds to a parallel displacement of the heating curve.

20 10 0 -10 - 20

-30

°C

2406D02

100

TV Flow temperature TA Composite outside temperature TRw Room temperature setpoint

4.28 Room influence

• More accurate room temperature control due to temperature checkback signal from

the space

• Use of heat gains

• Possibility of boost heating and quick setback

Benefit

Description

Setting

Effect

Example:

Parallel displacement

Benefit

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Defines the impact of room temperature deviations on the controlled system. Room temperature deviation is the temperature differential between actual room temperature and room temperature setpoint.

1. Press the operating line selection buttons to select operating line 101.

2. Press the + / – buttons to select the room influence.

Setting range Unit Factory setting

0 / 1 Increment 1

The setting will activate or deactivate the effect of room temperature deviations on the temperature control. Entry:

0 Room influence inactive:

The measured room temperature will not affect temperature control

1 Room temperature influence active: The measured room temperature will affect

the temperature control

Room influence means: Deviations of the actual room temperature from the setpoint are acquired and taken into account by temperature control.

To use the control variant "Weather compensation with room influence", the following conditions must be satisfied:

• An outside sensor must be connected (either to B9, the PPS or the LPB).

• Setting "Room temperature influence" (101) must be active (1)

• The respective room unit must be connected to terminal A6 (PPS)

• There may be no controlled thermostatic radiator valves

(If such valves are present, they must be set to their fully open position).

4.29 Switching differential of the room

temperature

• Temperature control with pump heating circuit

• Prevents overtemperatures in the room in the case of pump heating circuits

Serves as a room temperature limitation with pump heating circuits

1. Press the operating line selection buttons to select operating line 102.

2. Press the + / – buttons to set the room temperature switching differential.

Setting range Unit Factory setting

– – . –

0.5...4.0

°C

– – . –

The switching differential for two-position control will be changed. Entry:

- - . - Switching differential is inactive

• The pump always remains activated

Description

Setting

Effect

Room influence

Benefits

Description

Setting

Effect

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Decrease: Switching differential will become smaller

• Pumps are switched on and off more often

• Room temperature varies within a narrower band

Increase: Switching differential will become greater

• Pumps are switched on and off less often

• Room temperature varies within a wider band

With pump heating circuits, the amount of heat supplied is controlled by switching the pumps on and off. This is accomplished with two-position control by means of the room temperature's switching differential.

Room temperature acquisition requires a room unit.

OFF

°C

TRx

TRw+SDR

2371D02

TRw

°C

2379Z19

OFF

TRx

[]

Pump ON TRx = TRw Pump OFF TRx = TRw + SDR

4.30 Minimum limitation of the flow temperature

setpoint

• Prevents too low flow temperatures

Minimum and maximum limitation define the range within which the flow temperature setpoint may vary.

Room temperature control

 Note

Functioning:

Switching differential

Benefit

Description

TRx Actual value of the room temperature TRw Room

temperature setpoint

SDR Switching

differential of room temperature

P Pump (ON / OFF)

Setpoint

Switch-on point

Switch-off point

Legend TRx Actual value of the room temperature TRw Room temperature setpoint SDR Switching differential of room

temperature ON Switch-on point OFF Switch-off point t Time P Pump

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1. Press the operating line selection buttons to select operating line 103.

2. Press the + / - buttons to set the minimum limitation of the flow temperature setpoint.

Einst ellbereich Unit Factory setting

8...TVmax °C 8

TVmax Maximum limitation of flow temperature setpoint (setting on operating line 104)

0 10 20 30 40 50 60 70 80 90 100

max

min

akt

°C

2379Z09

TVw

TVw Current flow temperature setpoint 103 Minimum limitation of flow temperature setpoint 104 Maximum limitation of the flow temperature setpoint

The setting will make certain that the flow temperature setpoint will not fall below a minimum level.

If the flow temperature setpoint demanded by the heating circuit reaches the minimum limit and the outside temperature rises, the flow temperature setpoint will be maintained at that limit, in other words, it will not be allowed to fall below it.

4.31 Maximum limitation of the flow temperature

setpoint

• Prevents too high flow temperatures

Minimum and maximum limitation define the range within which the flow temperature setpoint may vary.

1. Press the operating line selection buttons to select operating line 104.

2. Press the + / - buttons to set the maximum limitation of the flow temperature setpoint.

Setting range Unit Factory setting

TVmin...95 °C 80

Tvmin Minimum limitation of flow temperature setpoint (setting on operating line 103)

Setting

Effect

Limitation

Benefit

Description

Setting

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0 10 20 30 40 50 60 70 80 90 100

max

min

akt

°C

2379Z09

TVw

TVw Current flow temperature setpoint 103 Minimum limitation of the flow temperature setpoint 104 Maximum limitation of the flow temperature setpoint

The setting will ensure that the flow temperature setpoint will not exceed a maximum level. Maximum limitation is not to be regarded as a safety function as required with underfloor heating systems, for example.

If the flow temperature setpoint demanded by a consumer reaches the maximum limit and the outside temperature falls, the flow temperature setpoint will be maintained at that limit, in other words, it will not be allowed to exceed it.

4.32 Type of building construction

• Consideration is given to the building's thermal dynamics

Enables the control system's response to be matched to the type of building construction.

1. Press the operating line selection buttons to select operating line 105.

2. Press the + / – buttons to select the type of building construction.

Setting range Unit Factory setting

0 / 1 Increment 1

When the outside temperature varies, the room temperature changes at different rates, depending on the building's thermal storage capacity. The above setting ensures that the generation of the composite outside temperature will be matched to the type of building construction. Also refer to "Composite outside temperature” in section "Functions without settings". Entry:

0 Heavy building structures: The room temperature will respond slower to outside

temperature variations

1 Light building structures: The room temperature will respond quicker to outside

temperature variations

• Heavy building structures:

Buildings with thick walls or with external insulation

• Light building structures:

Buildings with a light envelope

Effect

 Important

Limitation

Benefit

Description

Setting

Effect

Building construction

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4.33 Adaption of the heating curve

• No heating curve adjustments required

• Automatic adaption of heating curve

The adaption facility learns from the different heating situations and matches the control to the heating circuit at regular intervals. Also refer to section ”Adaption sensitivities” (lines 36

OEM

+ 37

OEM

1. Press the operating line selection buttons to select operating line 106.

2. Press the + / – buttons to select the type of heating curve adaption.

Setting range Unit Factory setting

0 / 1 Increment 1

The setting will switch automatic adaption of the heating curve on or off. Entry:

0 Automatic adaption inactive: The heating curve will use the setting made

1 Automatic adaption active: In automatic mode (nominal room temperature

setpoint

), the heating curve will automatically and continuously be adapted

Prerequisite is the presence of a room temperature sensor.

The adaption facility automatically matches the heating curve to the type of building construction and the heating requirements. Adaption gives consideration to room temperature deviations, outside temperature characteristics and adaption sensitivity. To achieve optimum adaption, the following situations should occur as rarely as possible - especially after commissioning - since this would reset certain calculations required for the adaption:

− Manual correction of heating curve

− Power failure

− Heating curve set to --.-

− Changes to the room temperature setpoint

Every day at midnight, the room temperature control differential of the previous day is evaluated. This evaluation leads to an automatic readjustment of the heating curve.

• Simple adaption (range

): At attenuated outside temperatures below 4 °C, it is only the slope of the heating curve that is adapted.

Within this temperature range, the readjustment is weighted with the factor f2 and adaption sensitivity 2 (line 37

OEM).

• Combined adaption (range

): At attenuated outside temperatures of between 4 and 12 °C, it is partly the slope and partly the parallel displacement that are adapted.

Within this temperature range, the readjustment of the parallel displacement is weighted with the factor f1 and adaption sensitivity 1 (line 36

OEM).

Benefit

Description

Setting

Effect

 Note

Adaption

 Note

Process

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The readjustment of the slope in this temperature range is weighed with factor f2 and adaption sensitivity 2 (line 37

OEM).

• No adaption (range

): At attenuated outside temperatures above 12 °C, the heating curve will not be adapted.

Example using a nominal room temperature setpoint of 20 °C.

2371D07

12 4 -4 -12

0,5

ged

ZAF1 ZAF2

f Factor f1 Factor for parallel displacement f2 Factor for slope TAged Attenuated outside temperature ZAF1 Adaption sensitivity 1 (line 36

OEM

)

ZAF2 Adaption sensitivity 2 (line 37

OEM

)

4.34 Maximum forward shift of optimum start

control

• Maximum forward shift of optimum start control.

Maximum forward shift is a limit function that defines the range of optimum start control.

Setting range Unit Factory setting 00:00...06:00 hh:mm 00:00

00:00 Optimum start control switched off

00:10...06:00 Optimum start control switched on

Diagram

Benefit

Description

Setting

Effect

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4.34.1 Optimum start control

Optimum start control acts with or without room influence. The maximum forward shift can be set with parameter ”Maximum forward shift with optimum start control” (range 0…6 h). This parameter can also be used to switch optimum start control off (setting 0).

During non-occupancy hours, the heating is maintained at the reduced level. Towards the end of the nonoccupancy time, optimization switches the control back to the normal level. Optimization calculates the changeover time such that, at the start of occupancy, the room temperature will have reached the nominal setpoint.

4.34.2 Without room influence

The composite outside temperature is used as the compensating variable. In the case of floor heating systems, the maximum forward shift should be longer than with radiator systems. Using the parameter for the constant of quick setback and optimum start control (KON), the forward shift can be matched the building dynamics.

Forward shift tE in hours and minutes with optimum start control without room influence:

TAgem KON 0 4 8 12 16 20

- 20 0 1h20 2h40 4h00 5h20 6h00

- 10 0 0h50 1h50 2h40 3h40 4h30

0 0 0h30 1h00 1h30 2h00 2h30

+ 10 0 0 0h10 0h10 0h20 0h20

TAgem Composite outside temperature tE Forward shift KON

Parameter for quick setback and optimum start control without room influence

KON = 0: Function deactivated

note: KON also acts on quick setback Small KON: for high building structures can be heated up fairly quickly Large KON: for heavy, well insulated building structures whose heating

up time is fairly long

4.34.3 With room influence

Optimum start control acts only when room influence is active.

The switch-on time for the heating (change to nominal level) is selected such that, at the beginning of the occupancy time according to the heating program, the room temperature reached will be the room temperature setpoint - 0.25 K. The correct switch-on time is determined by adaption.

Parameter KON:

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4.35 Maximum forward shift of optimum stop

control

• Maximum forward shift of optimum stop control.

Maximum forward shift is a limit function that defines the range of optimum stop control.

Setting range Unit Factory setting

00:00...06:00 hh:mm 00:00

00:00 Optimum stop control deactivated

00:10...06:00 Optimum stop control activated

4.35.1 Optimum stop control

Optimum stop control acts only when a room sensor is used and when room influence is active. The maximum forward shift can be set with parameter ”Maximum forward shift with optimum stop control” (range is 0…6 h). This parameter can also be used to switch optimum stop control off (setting = 0).

During occupancy hours, the heating is maintained at the nominal level. Towards the end of the occupancy time, the control switches to the reduced level. Optimization calculates the changeover time such that, at the end of occupancy time, the room temperature will be 0.5 °C below the nominal setpoint (early shutdown).

Adaption takes place only with the first occupancy period per day. The switch-off point is adapted in steps of 10 minutes. If the 0.25 K are not reached, the switch-off point is shifted forward by 10 minutes (earlier shutdown). In the other case, the switch-off point is shifted backward by 10 minutes (later shutdown).

Benefit

Description

Setting

Effect

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D.h.w. values

4.36 Reduced setpoint of the d.h.w. temperature

• High d.h.w. temperatures only if required

• Energy savings due to lower temperatures in the remaining time

Reduction of the d.h.w. temperatures outside main occupancy times. The time switch integrated in the controller automatically switches between main and secondary occupancy times. For more detailed information, refer to "D.h.w. heating program", operating lines 29...35 If the d.h.w. is heated by means of a control thermostat connected to terminal B3, reduced setpoint operation will not be possible.

1. Press the operating line selection buttons to select operating line 120.

2. Press the + / – buttons to adjust the reduced setpoint of the d.h.w. temperature.

Setting range Unit Factory setting

8...TBWw °C 40

TBWw Nominal setpoint of d.h.w. temperature (setting on line 13)

The temperature setpoint during reduced d.h.w. operation will be changed.

0 10 20 30 40 50 60 70 80 90 100 120 130 140 °C

2379Z10a

13 Setting "Nominal setpoint of d.h.w. temperature” 120 Setting "Reduced setpoint of the d.h.w. temperature” 40

OEM

Setting "Maximum nominal setpoint of the d.h.w. temperature”

D.h.w. heating has 2 different setpoints that can be used:

• Nominal setpoint of the d.h.w. temperature (setting on line 13)

Produces the d.h.w. temperature required during main occupancy times

• Reduced setpoint of the d.h.w. temperature (setting on line 120)

Produces the d.h.w. temperature required outside the main occupancy times

The periods of time during which these d.h.w. temperature setpoints shall be used can be set on line 121.

4.37 Release of d.h.w. heating

• Release of d.h.w. heating to the nominal setpoint as demanded by the consumers

• Release of d.h.w. heating can be matched to the plant's load curve

Makes it possible to limit the period of time during which d.h.w. heating at the nominal setpoint is released.

Benefit

Description

 Note

Setting

Effect

D.h.w. temperature setpoints

Benefit

Description

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1. Press the operating line selection buttons to select operating line 121.

2. Press the + / – buttons to enter the required period of time during which d.h.w. heating at the nominal setpoint shall be released.

Setting range Unit Factory setting

0...2 Increment 1

The setting defines the period of time during which d.h.w. heating at the nominal setpoint is released. Outside this period of time, the reduced d.h.w. setpoint applies. There is one exception, however, function d.h.w. push (function with no setting). Release of d.h.w. heating to the nominal setpoint takes place when using the following settings:

0 24 hours per day

1 According to the heating circuit time switch program)s) with forward shift

2 According to the d.h.w. time switch program of the RVA47.320

The frost protection temperature for d.h.w. is fixed at 5 °C and is always active.

4.37.1 24-hour operation - Setting 0

The d.h.w. temperature is always maintained at the nominal d.h.w. temperature setpoint, independent of any time switch programs (setting line 13).

0 6121824

2371Z18

4.37.2 Operation according to heating program(s) with

forward shift - Setting 1

For d.h.w. heating, the heating circuit time switch programs of the controllers in the selected range are taken into consideration. The selection of the range (local / segment / system) for which the d.h.w. is produced is made on operating line 123. The switch-on point for the release is shifted forward in time against the earliest switchon point of all heating circuits. The switch-off point for the release coincides with the last switch-off point of all heating circuits.

At the switch-on point, the controller switches from the reduced d.h.w. temperature setpoint (operating line 120) to the nominal d.h.w. temperature setpoint (operating line

13).

At the switch-off point, the controller switches from the nominal to the reduced d.h.w. temperature setpoint.

Setting

Effect

 Note

Example:

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The extent to which the switch-on point is shifted forward in time depends on the number of d.h.w. heating cycles permitted in a 24-hour period (operating line 124):

0 61217 245

2379Z29

4.37.3 Operation according to the d.h.w. time switch program

- Setting 2

For d.h.w. heating, time switch program (d.h.w.) of the local controller is taken into account. The set switching times of that program are then used to change over between the nominal d.h.w. setpoint (operating line 13) and the reduced d.h.w. setpoint (operating line 120). D.h.w. heating takes place independent of the heating circuit programs.

With this d.h.w. heating program, it is possible to have a maximum of 3 heating periods per day. The forward shift of the switch-on times is inactive.

0 6121824

2373Z24

4.38 Switching program circulating pump

• The circulating pump runs only during the selected periods of time

• No heat losses during the periods of time when there is no demand for d.h.w.

Defines the time switch program according to which the circulating pump is switched on and off.

1. Press the operating line selection buttons to select operating line 122.

2. Press the + / - buttons to select the required time switch program.

Setting range Unit Factory setting

0...1 Increment 1

Depending on the setting made, the circulating pump will be operated according to the following time switch program:

0 For the switching program of the circulating pump, the switching program of the

controller internal heating circuit will be adopted.

1 Switching program according to the selected d.h.w. release (operating line 121).

 Note

Example:

Heating periods

Example:

Benefit

Description

Setting

Effect

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4.39 Assignment of d.h.w. heating

• Assignment of d.h.w. heating to the respective consumers

• All relevant time switch programs are taken into consideration

• Controllers in holiday mode are taken into consideration

Determines the consumers for which d.h.w. will be heated and which time switch programs will be appropriately considered, also checking whether the relevant controllers are in holiday mode.

1. Press the operating line selection buttons to select operating line 123.

2. Press the + / – buttons to select the required assignment.

Setting range Unit Factory setting

0...2 Increment 2

Depending on the selection made, the d.h.w. will be heated for the following consumers: 0 For the local consumer only (RVA47.320)

1 For all consumers (controllers) in the same segment

2 For all consumers (controllers) in the LPB system

In the case of d.h.w. heating according to the heating circuit time switch program (operating line 121, setting 1), the time switch programs are used from the appropriate range for the release of d.h.w. heating at the nominal temperature setpoint, based on the consumers selected here. With all settings (operating line 121, setting 0 - 2), it is checked whether the controllers of the selected range are in holiday mode. Controllers in holiday mode will not be considered for d.h.w. heating.

If all controllers in the selected range are in holiday mode, d.h.w. heating will not be released. Only the frost protection function will remain active (function with no setting).

4.40 Number of d.h.w. charging cycles

• Choice of one or several d.h.w. charging cycles

• Forward shift of release matched to the number of d.h.w. charging cycles

With this setting, d.h.w. heating can be reduced to one charging cycle per day. The forward shift of d.h.w. heating against the range selected on operating line 123 will be appropriately adjusted.

This setting is effective only if, on operating line 121, setting 1 (according to the heating circuit time switch program(s)) has been selected.

1. Press the operating line selection buttons to select operating line 124.

2. Press the + / - buttons to select the type of d.h.w. heating.

Setting range Unit Factory setting

0...1 Increment 1

Benefit

Description

Setting

Effect

 Important

Benefit

Description

Note

Setting

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According to the selection made, the controller releases d.h.w. heating either once or several times per day and adjusts the forward shift accordingly.

Setting Charging / day Forward shift

0 One 2.5 hours

1 Several 1 hourStunde

4.40.1 Once per day with a forward shift of 2.5 hours

Setting 0

The number of daily releases for d.h.w. heating at the nominal temperature setpoint is limited to one. Also with this setting, the switch-on point is shifted forward by 2.5 hours against the range selected on line 123.

On days where space heating at the nominal room temperature setpoint is provided for 24 hours, d.h.w. heating is released at midnight for 2.5 hours.

4.40.2 Several times per day with a forward shift of 1 hour

Setting 1

The number of d.h.w. charging cycles will not be limited. Also with this setting, the switch-on point is shifted forward by one hour against the range selected on line 123.

4.41 Type of d.h.w. demand

• Possibility of using a d.h.w. storage tanks equipped with a control thermostat

Defines the type of d.h.w. control (via d.h.w. sensor or control thermostat).

Setting of this function has an impact on automatic generation of the type of plant. Operating line 53.

1. Press the operating line selection buttons to select operating line 125.

2. Press the + / - buttons to select the type of d.h.w. demand.

Setting range Unit Factory setting

0 / 1 Increment 0

By making this setting, the controller takes into account the signal fed to it by the d.h.w. sensor connected to terminal B3. Entry: 0: Sensor: the temperature measured with the sensor connected to terminal B3 is

used for the control of the d.h.w. temperature.

1: Control thermostat: the switching status of the control thermostat connected to

terminal B3 is used for the control of the d.h.w. temperature.

Effect

Benefit

Description

 Note

Setting

Effect

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The contacts of the control thermostat must be suited for extra low voltage (goldplated)!

When using a d.h.w. sensor: The controller calculates the switching points with the respective switching differential as a function of the d.h.w. temperature setpoint entered.

Sensor / line with a short- = fault message

Sensor value available = d.h.w. according to the current setpoint

Sensor / line with a short- = no d.h.w.

When using a d.h.w. control thermostat:

The controller takes into consideration the switching statuses of the control thermostat.

Line / terminal with short-circuit = d.h.w. charging ON

Line / terminal with open-circuit = d.h.w charging OFF

Contact resistance too high = error message from the thermostat

When using a d.h.w. control thermostat, reduced operation is not possible.

• The nominal d.h.w. temperature setpoint (operating line 13) must be equal to or

higher than the setpoint adjusted on the control thermostat (thermostat is calibrated at switch-off point)

• Boost of the flow temperature setpoint (setting on operating line 126) must be

minimum of 10 °C (has an impact on the charging time)

• In that case, frost protection for d.h.w. is not ensured

50 °C

56 °C

60 °C

70 °C

SD = 6 °C

∆

T > 0 °C

TBWw

2371Z36

TBWw + UEBW

TRw - SD

TRw

UEBW >= 10 °C

UEBW = Boost of the temperature setpoint (setting 126) TBWw = Nominal setpoint of the d.h.w. temperature (setting on operating line 13) TRW - SD = setpoint of the thermostat minus the switching differential TRw = setpoint of the thermostat (point of calibration)

4.42 Boost of the flow temperature setpoint for

d.h.w.

• Efficient d.h.w. heating

To allow the d.h.w. to be heated up, the boiler temperature must be higher than the d.h.w. setpoint.

 Important

Difference

 Note

Important when using a d.h.w. thermostat

D.h.w. control thermostat (example)

Benefit

Description

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1. Press the operating line selection buttons to select line 126.

2. Press the + / - buttons to adjust the setpoint boost.

Setting range Unit Factory setting

0...30 °C (K) 16

The setting will raise the boiler temperature setpoint when there is demand for d.h.w. Increase: Heating up time will become shorter

More overshoot

Decrease: Heating up time will become longer

Less overshoot

Using the two settings, the controller generates the boiler temperature setpoint for d.h.w. heating.

Setting on operating line 13

Nominal d.h.w. temperature setpoint

Setting on operating line 126

Boost

Total Boiler temperature setpoint

For d.h.w. control, refer to section "Switching differential of d.h.w. temperature” (line 41

OEM

4.43 D.h.w. priority

• Optimum allocation of boilers' heat output

Defines the priority of d.h.w. heating over space heating.

1. Press the operating line selection buttons to select line 127.

2. Press the + / - buttons to select the type of d.h.w. priority.

Setting range Unit Factory setting

0...3 Increment 1

During d.h.w. heating, space heating will be restricted, depending on the setting made. Entry:

0 Absolute priority

The controller-internal heating circuit and the heating circuits of other controllers connected to the LPB will be locked until the d.h.w. is heated up. The system pump remains in operation.

1 Shifting priority If the capacity of the heat generating equipment is no longer

sufficient, the amount of heat supplied to the heating circuits will be restricted until d.h.w. heating is terminated.

2 No priority: D.h.w. heating and space heating at the same time.

Setting

Effect

boiler boost

 Note

Benefit

Description

Setting

Effect

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In the case of tightly sized boilers and mixing heating circuits, the setpoint may not be reached if the heating load is great, since too much heat is required for space heating.

3 Shifting / absolute priority

If the capacity of the heat source is no longer sufficient, the mixing heating circuits will be restricted until d.h.w. heating is terminated. The pump heating circuits will be locked until d,h.w. is heated up.

Frost protection for the plant is fully active only in the case of setting 2. With setting 0 or 1, it will be partly or fully restricted. If the boiler is correctly sized, frost protection for the plant is also ensured when using setting 1. In the case of plants where there is a considerable risk of frost (e.g. plants with outdoor heating), setting 0 should not be used.

4.43.1 Shifting priority

The purpose of the function "Shifting priority" is to achieve optimum d.h.w. heating. This means that during d.h.w. heating, the actual boiler temperature should be as close as possible to the boiler temperature setpoint without shutting down the burner. To achieve this, it may be necessary to restrict the heating circuits by means of a locking signal. The signal is generated by a temperature-time integral. Depending on the consumer, the locking signal will lead to switching on / off or a setpoint reduction.

Cycling or deactivation of the pumps will reduce the amount of heat drawn from the heat source. This will considerably shorten the time required for heating up the d.h.w.

• Heating circuit pump:

Status Effect

Locking signal < 20 % Normal pump operation Locking signal > 20 % Heating circuit pump cycles Locking signal > 93 % Heating circuit pump OFF

• D.h.w. pump or boiler pump:

No effect

Through the generation of the temperature-time integral it is not only the period of time that is considered, but also the extent of the undershoot. This means that when the crossing is significant, the pumps will be deactivated earlier.

The consumption of heat is considerably reduced through the reduction of the flow temperature setpoints. This reduces considerably the heating up time for d.h.w., with a minimum impact on the heating circuits.

• Mixing valve:

Status Effect

Locking signal > 0 %

Flow temperature setpoints will be lowered.

The extent of lowering is dependent on the magnitude and the period of time of the undershoot.

Locking signal reduced to 0 %

Setpoints according to the normal control condition

Through the generation of the temperature-time integral it is not only the period of time that is considered, but also the extent of the undershoot. This means that when the undershoot is significant, the setpoint reduction will be greater.

Frost protection for the plant

Impact on 2-position loads

Switching point

Impact on modulating loads

setpoint reduction

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This temperature-time integral generates the locking signal for restricting the heating circuits. When generating the locking signal, one of four different procedures is used:

Diagram

Procedure

a to b Within a foreseeable period of time, the actual value of the boiler

temperature (TKx) will no longer be within the switching differential of the boiler temperature setpoint.

 Locking signal will be increased b to c and d to e

Within a foreseeable period of time, the actual boiler temperature (TKx)

will lie within the switching differential of the boiler temperature setpoint.

 Locking signal will remain at a constant level

c to d and e to f

Within a foreseeable period of time, the actual boiler temperature (TKx)

will lie above TKw.

 Locking signal will be decreased f

The actual boiler temperature (TKx) exceeds the boiler temperature

setpoint.

 Locking signal will be set to 0 %.

a Start of d.h.w. heating TK Boiler temperature TKw Boiler temperature setpoint TKx Actual value of the boiler temperature SDK Boiler’s switching differential (factory setting 8K) t Time Y Locking signal

Temperature-time integral

Example:

TKx

2378Z1 1

a b

TKw

cd ef

SDK

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4.44 Demand for heat with reduced d.h.w.

setpoint

• Selectable type of heat demand with reduced d.h.w. setpoint

In connection with alternative sources of energy, an early release of heat generation (BMUs) for d.h.w. heating outside the main occupancy times is often undesirable. A choice of two different procedures is available releasing the cascade earlier or later.

1. Press the operating line selection buttons to select operating line 129.

2. Press the + / - buttons to select the required assignment.

Setting range Unit Factory setting

0 / 1 - 1

The setting determines whether or not heat generation will be released for maintaining the reduced d.h.w. setpoint:

No (use with buffer storage tank and alternative heat source).

Outside the main occupancy hours, the attempt is made to bring the d.h.w. temperature to the reduced setpoint level using energy from the buffer storage tank. This means that the d.h.w. charging pump runs but the demand for heat will be suppressed. Heat generation for d.h.w. charging will be released only (d.h.w. push) when the d.h.w. temperature has dropped below the reduced setpoint by twice the d.h.w. switching differential (41

OEM

Yes (standard procedure).

Outside the main occupancy hours, the d.h.w. temperature is raised to the level of the reduced setpoint. This is accomplished by sensing a heat demand signal to the heat source (individual boiler or cascade).

Benefit

Description

Setting

Effect

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Cascade settings

4.45 Changeover of boiler sequence in a

cascade

• Even wear and tear of the boilers in a cascade, or

• Selectable fixed switching on / off sequence

• Different time intervals for changeover of boiler sequence can be set

The parameter determines whether or not the switching on / off sequence of the boilers shall be changed after an adjustable period of time.

1. Press the operating line selection buttons to select operating line 130.

2. Press the + / – buttons to select “---“ or enter the number of operating hours after

which changeover of boiler sequence shall take place.

Setting range Unit Factory setting

--- / 10...990 - / hours 500

--- Fixed switching on / off sequence of the boilers in the cascade. The lead

boiler can be freely selected (refer to operating line 132); the other boilers are switched on and off in the order of the device addresses / subaddresses.

10...990 On completion of the number of operating hours set here, the switching

sequence of the boilers in the cascade will change. This means that the boiler with the next higher device address will become the lead boiler.

Example of four boilers with a set differential of 100 operating hours.

1st changeover 2nd changeover 3rd changeover 4th changeover

BMU 1

BMU 2

BMU 3

BMU 4

BMU 2

BMU 3

BMU 4

BMU 1

BMU 3

BMU 4

BMU 1

BMU 2

BMU 4

BMU 1

BMU 2

BMU 3

t [h]

100

300

400200

P [kW]

2379Z07

Lag boiler

lead boiler

t = Total number of operating hours of all lead boilers [h] P = Total output of cascade [kW]

Benefit

Description

Setting

Effect

Example:

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4.46 Exemption from automatic changeover of

the boiler sequence

• Individual boilers can be exempted from automatic changeover

Use this function if you want to operate a certain boiler as the first and / or last boiler of the switching on sequence.

1. Press the operating line selection buttons to select line 131.

2. Press the + / – button to enter the boiler(s) to be exempted from automatic changeover.

Setting range Unit Factory setting

0...3 - 0

Setting this parameter has an effect only if, on operating line ”Changeover of boiler sequence in a cascade” (line 130), setting ”Automatic changeover according to the number of operating hours” (10...990 h) has been selected.

Depending on the selected setting, the respective boiler will be exempted from automatic changeover of the boiler sequence. Entry:

0 No exemption.

The switching on sequence of the boilers will change on completion of the number of operating hours set (line 130).

1 The first boiler is exempted.

The first boiler in the addressing scheme always remains the lead boiler. With the other boilers, the switching on sequence changes when the set number of operating hours have elapsed (line 130).

2 The last boiler is exempted.

The last boiler in the addressing scheme always remains the last boiler. The other boilers will be switched over on completion of the number of operating hours set (line 130).

3 The first and the last boiler are exempted.

The first boiler in the addressing scheme always remains the lead boiler. the last boiler in the addressing scheme always remains the last boiler. The boilers in between will be switched over on completion of the number of operating hours set (line 130).

The boiler sequence is to be determined on operating lines ”Device address” (line 140) and ”Segment address” (line 141).

Benefit

Description

Setting

 Important

Effect

 Note

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4.47 Lead boiler with a fixed changeover of the

boiler sequence

• Lead boiler of the cascade with a fixed changeover of the boiler sequence can be

freely selected

• Better adjustment to the plant’s demand profile by selecting a suitable type of boiler

as the lead boiler With a fixed changeover of the boiler sequence (refer to operating line 130), the lead boiler can be freely selected.

1. Press the operating line selection buttons to select operating line 132.

2. Press the + / - buttons to select the required lead boiler.

Setting range Unit Factory setting

00.1...16.3 - -

The boiler defined as the lead boiler is always the first boiler to be switched on and the last to be switched off. The other boilers are switched on and off in accordance with the order of the device addresses / device subaddresses. For example, display 1.1 means that device 1 (in segment 0), device subaddress 1 (BMU 1), is the selected lead boiler.

All cascade boilers must be in segment 0 so that the heat demand signals from all segments can be acquired. For more detailed information about the device address / device subaddress, refer to ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E).

This setting has an effect only if function "Changeover of boiler sequence in cascades" (operating line 130) is set to ”---” = fixed switching on / off sequence.

Benefit

Description

Setting

Effect

 Note

 Important

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4.48 Switch-on delay lag boilers

• Smooth operation due to stable operating conditions

• Adjustable rate of release of total capacity

After a BMU has switched on, an adjustable period of time must elapse until another BMU can be switched on.

1. Press the operating line selection buttons to select operating line 133.

2. Press the + / - buttons to enter the number of minutes on completion of which another BMU can be switched on.

Setting range Unit Factory setting

1...120 Minutes 5

For stability reasons, each BMU added to the cascade will first run in its basic stage for about one minute. This minute is already contained in the adjusted switch-on delay. Correct adjustment of the switch-on delay ensures that plant operating conditions will be stable. This prevents frequent cycling of the BMUs.

The function is only active with "Serial 2" (setting on line OEM 61 = 0)

4.49 Restart lock of BMUs

• Too frequent switching on / off cycles of the BMUs will be avoided

A BMU that has just been switched off can be switched on again only after an adjustable period of time has elapsed.

1. Press the operating line selection buttons to select operating line 134.

2. Press the + / - buttons to enter the number of minutes on completion of which a switched off BMU can be switched on again.

Setting range Unit Factory setting

0...1800 Seconds 300

The restart lock ensures that a BMU that has just been switched off will not be switched on again a short time later. The BMU will be released again only after the adjusted period of time has elapsed. This prevents frequent cycling of the BMUs and ensures that plant conditions will be more stable.

Benefit

Description

Setting

Effect

Note

Benefit

Description

Setting

Effect

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LPB / system

• Creation of systems

• Wide field of use with a smaller number of unit versions

• Plants can be extended in a straightforward manner

The LPB is used as a communication basis for generating a system with additional ALBATROS™ controllers or controllers of other manufacture.

4.50 LPB device address

The device address and the segment address are used as destinations in the bus system (similar to a postal address). To ensure communication, each device must be correctly addressed.

1. Press the operating line selection buttons to select operating line 140.

2. Press the + / - buttons to enter the device number.

Setting range Unit Factory setting

0...16 Increment 1

Entry of the device address is especially important when using combinations of units, or in a system. The addresses classify the controllers within a segment. Entry:

Address Effect Example

0 Standalone Single controllers

1 Master (LPB)

− Controllers with master function

− Cascade master

− Heat generation master

− Consumer master in the respective segment

2...16 Slave (LPB)

− Controllers with slave function

− Other heat generation controller

− Heating circuit controller

− D.h.w. controller

The device addresses should be assigned in consecutive order in accordance with the controllers connected. It is not permitted to assign an address several times within a bus segment, since this would lead to communication errors. Each segment must have a device as a master (address 1).

For more detailed information about the addressing of devices in a system, refer to ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E).

Benefit

Description

Setting

Effect

Device address

 Note

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4.51 LPB segment address

The segment address and the device address are used as destinations in the bus system (similar to a postal address). To ensure communication, each device must be correctly addressed.

1. Press the operating line selection buttons to select operating line 141.

2. Press the + / - buttons to enter the segment address.

Setting range Unit Factory setting

0...14 Increment 0

Entry of the segment address is especially important when used in a system. With this setting, the system can be subdivided into a number of segments. Entry:

0 Heat generation segment

1...14 Heat consumer segment

A bus segment is comprised of a number of devices that are used in the same place of application. All devices in a segment must carry the same segment address.

For more detailed information about the addressing of devices in a system, refer to ”Local Process Bus (LPB), Basic Documentation, System Engineering” (document no. CE1P2370E).

4.52 LPB power supply

• A central bus power supply is not required in systems with up to 16 devices

• Straightforward extension of systems

The bus power supply via the controllers enables the bus system to be powered directly by the individual controllers (no central bus power supply).

1. Press the operating line selection buttons to select operating line 142.

2. Press the + / - buttons to select the type of bus power supply.

Setting range Unit Factory setting

0 / 1 Increment 1

Entry: 0 Off

No bus power supply via the controller.

1 Automatically

The bus power supply (LPB) via the controller is automatically switched on and off depending on the requirements of the LPB.

The actual status of the power supply is shown on operating line 143.

The bus system (LPB) can be powered either via the individual controller bus power supplies or via a central bus power supply.

Description

Setting

Effect

Segment number

 Note

Benefit

Description

Setting

Effect

 Note

Bus power supply