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Siemens Building Technologies

Basic Documentation RVA47.320

CE1P2379E

HVAC Products

Functions with no settings

15.07.2002

7.9 Frost

protection

•

Ensures that the boiler and d.h.w. temperature will not fall below a certain level

In addition to the frost protection modes described here, frost protection for the building

and frost protection for the plant, whose parameters can be set, are also active. For
details, refer to the description given on lines 15 and 33

OEM

.

7.9.1

For the boiler

The frost protection function for the boilers is integrated in the BMUs. For detailed
information, refer to the technical documentation of the product used.

For details, refer to the documentation of the relevant product.

7.9.2

For the d.h.w.

Frost protection for the d.h.w. prevents freeze-ups of the d.h.w. storage tank that is

connected directly to the RVA47.320. Whenever the d.h.w. temperature drops
excessively, forced charging will be initiated.

If... then...

the actual value of the d.h.w. temperature falls below 5
°C...

(TBWx < 5 °C)

... the frost protection
function for the d.h.w.
becomes

active

the actual value of the d.h.w. temperature exceeds 5 °C
by more than one d.h.w. switching differential (line

41

OEM

)...

(TBWx > 5 °C + SDBW)

... the frost protection
function for d.h.w. will be

terminated

•

The frost protection setpoint for the d.h.w. is factory-set at 5 °C and cannot be
changed

•

Pump overrun will be activated when d.h.w. heating is terminated.

•

The frost protection function only acts on a d.h.w. storage tank connected directly

to the RVA47.320. In the case of plant types with d.h.w. heating via BMU, this
function must be provided by the BMU.

•

The frost protection function is only active when using a temperature sensor. If the
d.h.w. is heated with the help of a control thermostat, no frost protection function is
possible because there is no actual value of the storage tank temperature.

Benefit

Note

Description

Process

Notes

Important

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Summary of Contents for RVA47.320

Page 1: ...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 ...

Page 2: ...2 166 Siemens Building Technologies Basic Documentation RVA47 320 CE1P2379E HVAC Products 15 07 2002 ...

Page 3: ...gineer 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 operati...

Page 4: ...perature 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 valu...

Page 5: ...ith 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...

Page 6: ...f 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...

Page 7: ... 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 ...

Page 8: ...A43 222 C series it is possible to operate mixed cascades modulating multi stage 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 ...

Page 9: ...ompensated 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 delivere...

Page 10: ...ostat 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 de...

Page 11: ...ller 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 senso...

Page 12: ...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...

Page 13: ...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 guidelin...

Page 14: ...79Z12 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 ...

Page 15: ...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 em...

Page 16: ...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 Q3 Q1 F1 L N M B10 B9 MD A6 MB DB 6 5 4 M 2 1 M M 3 2 F 4 3 2 F L N 2379A01 B3 B70 B4 H1 Rear of controlle...

Page 17: ... 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 Termina l 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 Not used Not used Not used L Live AC 230 V mai...

Page 18: ...ne 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 3 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 s...

Page 19: ...emperature 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 5 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...

Page 20: ...ection buttons to select the required line The parameter list on the next pages contains all available lines 3 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 4 By pressing any of the operating mode buttons you leave the programm...

Page 21: ...om 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 th...

Page 22: ...rogramming level Heating engineer 3 Press the line selection buttons to select the required line The parameter list on the next 2 pages contains all available lines 4 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 5 You leave th...

Page 23: ...lue 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 1 Input B3 or value from BMU 0 140 C 1 60 Attenuated outside temperature Taxged 50 0 50 0 C 0 5 61 Composite outside temperature TAxgem 50 0 50 0 C 0 5 62 outside tem...

Page 24: ... 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 adapt...

Page 25: ... 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 1...

Page 26: ... 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 1 If a BMU is connected via LPB this setting will not be active The respective setting must be made directly on the BMU ...

Page 27: ...entered incorrectly the display will change to the Parameter settings for the heating engineer 4 Press the line selection buttons to select the required line The parameter list on the next 2 pages contains all available lines 5 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 co...

Page 28: ... C 1 5 33 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...

Page 29: ...n 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 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 ...

Page 30: ...dout 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 c...

Page 31: ... 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...

Page 32: ...ting 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 progr...

Page 33: ... 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 fu...

Page 34: ...ng 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 prote...

Page 35: ...nt 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 the...

Page 36: ...gs 15 07 2002 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 2OEM Common flow temperature cascade flow temperature 0 4 8 12 16 20 24 2379Z02 Display ...

Page 37: ...t 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 Pr...

Page 38: ...l 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 corre...

Page 39: ...ng 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 sw...

Page 40: ...tching 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 weekda...

Page 41: ...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...

Page 42: ...0 140 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 40OEM 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 m...

Page 43: ...oint 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...

Page 44: ... 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 s...

Page 45: ... 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 switc...

Page 46: ...e 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 ...

Page 47: ...tation RVA47 320 CE1P2379E HVAC Products Description of the enduser settings 15 07 2002 20 10 0 10 20 30 90 80 70 60 50 40 30 C C 40 35 30 27 5 25 22 5 20 17 5 15 12 5 10 7 5 5 2 5 100 2000D07 TA TV TV Flow temperature TA Composite outside temperature ...

Page 48: ...red 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...

Page 49: ...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 S...

Page 50: ...g 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 set...

Page 51: ...een 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 0...

Page 52: ...t 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 c...

Page 53: ...s 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 sen...

Page 54: ...th 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 0 4 8 12 16 20 24 2379Z02 Faulty devices Display Er indicates that a fault has oc...

Page 55: ... 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 detect...

Page 56: ...ith 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 diag...

Page 57: ...y pump for HCs only temperature Yes No 34 2 5 40 heating circuit pump temperature No No 35 2 5 40 heating circuit pump temperature x Yes 35 2 5 40 heating circuit pump Control x No 36 2 5 40 heating circuit pump temperature Yes No 65 x Pump H1 temperature No No 66 x Pump H1 temperature x Yes 66 x Pump H1 Control x No 67 x Pump H1 temperature Yes No x means that the setting has no influence on the ...

Page 58: ... 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...

Page 59: ...e 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 comm...

Page 60: ...s 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 ...

Page 61: ...n 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 sens...

Page 62: ... 15 07 2002 4 1 2 3 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 ...

Page 63: ...de 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...

Page 64: ...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 prevail...

Page 65: ...ture 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 TAakt TAged Light setting 105 1 Tagem TAakt 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 t...

Page 66: ...vice 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 ...

Page 67: ...he 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 o...

Page 68: ...al 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 ...

Page 69: ...tpoint 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 se...

Page 70: ...d 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 ...

Page 71: ...uence 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 lea...

Page 72: ...83 Number of burner operating hours of BMU 4 For information about the selection of the cascade management strategy refer to operating lines 50OEM to 52OEM 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 boi...

Page 73: ... 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 absolu...

Page 74: ...culating 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 d...

Page 75: ...ture 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 tan...

Page 76: ... 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...

Page 77: ...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 I...

Page 78: ...e s switching differential Room temperature acquisition requires a room unit OFF ON P C TRx TRw SDR 2371D02 TRw t C 2379Z19 ON OFF w TRx P 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 Fu...

Page 79: ... 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 hi...

Page 80: ...al 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 ...

Page 81: ...e 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 h...

Page 82: ... of 20 C 0 2371D07 TA 12 4 4 12 0 5 1 f 20 ged f1 f2 ZAF1 ZAF2 f Factor f1 Factor for parallel displacement f2 Factor for slope TAged Attenuated outside temperature ZAF1 Adaption sensitivity 1 line 36OEM ZAF2 Adaption sensitivity 2 line 37OEM 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...

Page 83: ... 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 tE TAgem Compo...

Page 84: ...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 t...

Page 85: ... 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 40OEM Setting Maximum nominal setpoint of the d h w temperature D h w heating has 2 different setpoints that can be used Nominal setpoi...

Page 86: ...tion 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 6 12 18 24 h 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 o...

Page 87: ...to have a maximum of 3 heating periods per day The forward shift of the switch on times is inactive 0 6 12 18 24 h 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...

Page 88: ...tch 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...

Page 89: ...he 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 gen...

Page 90: ...g 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 protecti...

Page 91: ...ion 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 restri...

Page 92: ...me 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...

Page 93: ...sed 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...

Page 94: ...g 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 fo...

Page 95: ... 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...

Page 96: ...d 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 li...

Page 97: ...r 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 ...

Page 98: ... 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 ...

Page 99: ...crement 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 ...

Page 100: ...tailed 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 contr...

Page 101: ...this operating line Display ON The bus power supply via controllers is currently active At the moment the controller supplies some of the power required by the bus OFF The bus power supply via controllers is currently inactive Power supply to the bus can be accomplished in different ways The respective setting is made on operating line 142 4 54 Displaying the LPB communication Overview of communic...

Page 102: ...ed in segment 0 address 0 1 With any other addressing it has no effect 4 56 Automatic summer winter changeover Makes possible a uniform changeover of all heating circuits in the selected range of action Summer winter changeover of the selected range of action takes place when the changeover temperature set on operating line 16 is reached 1 Press the operating line selection buttons to select opera...

Page 103: ... central standby circuit does not affect d h w heating This means that the d h w is heated according to the settings made If the function is activated from the master controller the operating mode buttons of all affected controllers in the segment or system will flash 4 58 Clock mode Straightforward time synchronization of the controllers in the system Clock operation is an important setting for t...

Page 104: ...tem time Adjustment Controller time System time 3 System clock master The clock time on the unit can be adjusted and at the same time adjusts the system time The controller s time is used for the system Adjustment Controller time System time 4 59 Winter summertime changeover Automatic changeover of the yearly clock to summertime In accordance with present international standards the change from wi...

Page 105: ...place on the last Sunday in October The standard setting of the controller complies with this rule since that Sunday lies between the standard setting and the last day of the relevant month With this setting the day of changeover can be matched to changing standards On the Sunday following that date the controller s time of day will switch over to wintertime For that purpose the time of day is shi...

Page 106: ...perating mode remote telephone switch for heating circuit only The operating mode is changed when the contact closes 2 Minimum setpoint of flow temperature contact H1 The Minimum setpoint of flow temperature contact H1 set on operating line 171 will be activated when the contact closes 3 Heat generation lock The heat sources will be locked when the contact closes 4 Demand for heat The demand for h...

Page 107: ...tem also refer to Local Process Bus LPB Basic Documentation System Engineering document no CE1P2370E The effect depends on the setting made on operating line 145 Changeover of all controllers in the entire LPB system Prerequisite Operating line 145 must be set to 1 range of action entire system The contact must be connected to the master controller in segment 0 Possible address Device address 1 li...

Page 108: ...ating mode selected last Check Buttons or flash on all controllers in the same segment 1 1 With setting 0 as selected above d h w heating locked the two buttons and will flash With setting 1 as selected above d h w heating remains released only operating mode button will flash 4 61 2 Minimum setpoint of flow temperature contact H1 see operating line 171 Setting 2 4 61 3 Heat generation lock Settin...

Page 109: ...setpoint of 0 130 C and considers this value when generating the setpoint of the cascade v 0 2 4 6 8 10 10 20 30 40 50 60 70 80 90 100 110 120 130 c 2379Z26 T 130 C T 50 C T 70 C T 90 C T 110 C S 5 C T maximum value of heat demand S minimum limitation of heat demand 5 C The setpoint for 10 V can be set with parameter Maximum value of heat demand operating line 172 setting range 5 130 C The voltage...

Page 110: ...ry setting 8 TKmax C 70 TKmax Maximum limitation of BMU setpoint operating line 2 OEM Function Minimum setpoint of flow temperature contact H1 selected on operating line 170 will be activated when contact H1 closes The heat source or the cascade will maintain the temperature level set here until either contact H1 reopens or more heat is demanded If several heat demand signals are received at the s...

Page 111: ... on this temperature the controller converts the heat demand voltage signal to a temperature 4 64 Operating action of the contact connected to H1 The operating action of the contact can be matched to the type of output signal delivered by a device of other manufacture More flexibility when selecting non Landis Staefa products both operating actions can be considered This function enables the opera...

Page 112: ...on of the boiler temperature setpoint Maximum limitation of the boiler temperature setpoint Preset temperature for manual operation Maximum limitation of the boiler temperature setpoint and delivery of the flow temperature setpoint for the cascade in manual operation 1 Press the line selection buttons to select line 2OEM 2 Press the buttons to set the maximum limitation of the boiler temperature s...

Page 113: ...etting range Unit Factory setting 0 20 min 5 All pumps that at the time of burner shutdown of the last boiler were operating continue to run for the period of time set here At the same time the previous flow temperature setpoint remains valid allowing the mixing valves of the controllers connected to LPB to stay open ON OFF t HK Q t TVNw TVRw 2373Z28 Y t tPN HK Operating mode Q Pumps Y External mi...

Page 114: ...tons to adjust the calibration factors Setting range Unit Factory setting 100 100 0 In that case Operating line 25 BMU 1 Operating line 26 BMU 2 Operating line 27 BMU 3 Operating line 28 BMU 4 The output signal delivered by the respective BMU is corrected by the adjusted factor and then used for controller internal calculations In principle operation without the adjusted calibration factor is poss...

Page 115: ...ne 30OEM 2 Press the buttons to set the gain factor Setting range Unit Factory setting 0 20 4 Changing this setting has the following impact Entry Increase Authority of room influence will increase Decrease Authority of room influence will decrease The value of setting 30OEM is divided by 2 and multiplied by the differential room temperature setpoint actual room temperature The result is then adde...

Page 116: ... setback is started as soon as a change to a lower room temperature setpoint takes place e g switching times in automatic mode During quick setback the heating circuit pump will be deactivated and no heat demand signal delivered Exception Due to frost protection for the plant the heating circuit pump can be activated however in spite of quick setback The quick setback time is generated based on se...

Page 117: ...t Setting range Unit Factory setting 0 20 C K 5 The duration of boost heating will be changed Entry Increase More setpoint boost Heating up time will become shorter Decrease Less setpoint boost Heating up time will become longer Boost heating is started as soon as switching to a higher room temperature setpoint occurs e g switching times in automatic mode The room temperature setpoint will be rais...

Page 118: ...ction deactivated 1 Frost protection for the plant ON Function activated The heating circuit pump will be switched on in function of the actual outside temperature even if there is no demand for heat Outside temperature Pump Diagram 4 C Continuously ON ON 5 1 5 C ON for 10 minutes at 6 hour intervals takt 1 5 C Continuously OFF OFF Between 4 5 C different statuses can occur In this temperature ran...

Page 119: ...le in a way that the effect of too high flow temperatures will be offset 0 Overtemperature protection deactivated 1 Overtemperature protection activated The cycling period is fixed at 10 min This period of time will be broken down according to the following on time ratio TRw TVxGed TRw TVwGef ε ε On time ratio TVwGef Demanded flow temperature setpoint TRw Current room temperature setpoint TVxGedAc...

Page 120: ...activated 1 Press the line selection buttons to select line 35OEM 2 Press the buttons to set the effect of heat gains Setting range Unit Factory setting 2 4 C 0 The setting compensates the sum of all constant heat gains as follows Increase For more compensation In the case of significant heat sources Decrease For less compensation In the case of less significant heat sources The setting in C corre...

Page 121: ...n sensitivity 2 Adaption of the heating curve as a function of the outside temperature Adaption sensitivity 2 serves for adapting the heating curve in the temperature range below 4 C also refer to section Adaption of heating curve line 106 1 Press the line selection buttons to select line 37OEM 2 Press the buttons to adjust the adaption sensitivity Setting range Unit Factory setting 1 15 15 The le...

Page 122: ... 1D07 TA 12 4 4 12 0 5 1 f 20 ged f1 f2 ZAF1 ZAF2 f Factor f1 Factor for parallel displacement f2 Factor for slope TAged Attenuated outside temperature ZAF1 Adaption sensitivity 1 line 36OEM ZAF 2 Adaption sensitivity 2 line 37OEM For more detailed information about the effects refer to operating line Adaption of heating curve line 106 Note ...

Page 123: ...ting Nominal setpoint of d h w temperature 120 Setting Reduced setpoint of d h w temperature 40OEM Setting Maximum nominal setpoint of d h w temperature 5 15 Switching differential of the d h w temperature Optimum frequency of d h w heating D h w control is in the form of a two position controller with an adjustable switching differential The switching differential for d h w control has no impact ...

Page 124: ...d at regular intervals The legionella function ensures that the d h w in the storage tank will periodically be raised to a temperature of at least 60 C thus making certain that potential legionella viruses will be killed 1 Press the line selection buttons to select line 42OEM 2 Press the buttons to activate or deactivate the legionella function Setting range Unit Factory setting 0 1 Increment 1 Th...

Page 125: ...ons to adjust the required setpoint Setting range Unit Factory setting 8 95 C 65 The setting changes the d h w setpoint during the period of time the d h w is heated up as a result of the legionella function 6 3 Protection against discharging of d h w Prevents inadvertent discharging of the d h w storage tank via the heating system Prevents inadvertent discharging of the d h w storage tank by cold...

Page 126: ...nk sensor based on B10 or B2 When protection against discharging of the d h w is active the boost of the flow temperature operating line 126 is checked during the heating cycle If at least half the boost value is reached d h w heating will be released If the boost value is less than 1 8 of the value set d h w heating will not be released Setting 1 may be used only if the cascade return temperature...

Page 127: ...lect the required combination of lead boiler operation and running time strategy Setting range Unit Factory setting 1 6 1 2 There is a total of 2 types of lead boiler operation and three running time strategies available The 6 combinations are assigned as follows Einstellung Kombination type of lead boiler operation running time trategyrunning 1 autonomous 1 2 autonomous 2 3 autonomous 3 4 linked ...

Page 128: ...average actual output is within the defined output range however for exceptions refer to lines 51 and 52 A differentiation is made between lead boiler and lag boilers The RVA47 320 delivers a temperature setpoint to the lead boiler which translates it into output The lag boilers take this output as maximum limitation of output thus following the lead boiler 4 1 2 3 wt 70 C T 69 C P 50 2379z04 wp 5...

Page 129: ...dded to the cascade first runs on the basic stage for about one minute on completion of which it will be released for modulating control to deliver the output required The running time strategies described below become active only when the flow temperature setpoint is reached During the heating up time e g after night setback the boilers required are run up to the maximum released output as quickl...

Page 130: ...100 100 20 20 20 20 20 P OFF 30 30 OFF 40 80 80 80 Additional boilers are switched on as early as possible and switched off as late as possible Hence the aim is to have the highest possible number of boilers in operation or to obtain long running times for additional boilers 2379Z05a ON ON OFF OFF 20 20 20 30 30 20 20 40 40 20 20 30 30 20 20 20 27 27 27 100 100 100 P 27 27 27 increase in output Sw...

Page 131: ...ypically the set minimum limitation of the output lies above the lowest basic stage of all BMUs A lower setting causes several BMUs to cycle Do not use lower settings without having tested them in practical operation The setting defines the minimum limit of the output range within which the BMUs are controlled The value is used as the switch on or switch off criterion according to the selected run...

Page 132: ...exceptional cases e g when the setting of the value is too low or when due to the BMUs output ratio an invalid operational status would result after changeover When using a setting of 100 the value will of course never be exceeded 6 7 Mandatory time on basic stage The minimum running time on the basic stage can be defined This function allows the minimum running time on the basic stage to be set T...

Page 133: ...g a certain level The setting is only active when running time strategy 2 or 3 is selected see page 35 With running time strategy 1 the function is inactive When the return temperature rises to a level which is half a switching differential MTS 2 below the flow temperature point a the selected running time strategy 2 or 3 is switched over to running time strategy 1 This means that one of the BMUs ...

Page 134: ...lay Setting range Unit Factory setting 0 1 0 This setting changes the continuous display of the device It appears when no operating line is selected 0 Day time of day The continuous display shows the weekday 1 7 Mo Su and the time of day 1 Cascade flow temperature sensor common flow temperature sensor The continuous display shows the temperature measured with the cascade flow temperature sensor B1...

Page 135: ... first 2 digits give the software version 01 The third digit gives the software revision 0 6 11 Device operating hours Display of the number of device operating hours Here you can read the number of hours the controller has been in operation 1 Press the line selection buttons to select operating line 92OEM 2 No setting can be made with the buttons Display Unit 0 500 000 h The number of operating h...

Page 136: ...the BMU or on completion of a period of time to be adjusted on the BMU the controller returns to its initial operational status For information about the activation of the chimney sweep function and other information refer to the technical documentation of the type of BMU used 7 2 Generating the boiler temperature setpoint Demand dependent control of the burner The various heating circuits require...

Page 137: ...ermediate seasons Manual switching off is no longer required The automatic 24 hour heating limit does not function in continuous operation The display shows the automatic 24 hour heating limit as ECO 7 3 1 Without room influence If no room unit is connected the room temperature setpoint will not be readjusted by the room influence In that case the automatic 24 hour heating limit operates according...

Page 138: ...m influence is used The temperature basis used for this process are the values of the flow temperature setpoint and the current room temperature setpoint If the flow temperature setpoint corrected by the room influence falls below the room temperature setpoint plus a correction value the heating will be switched off Heating s switch off point 16 31OEM 10 S 2 TRw TVwk If the flow temperature setpoi...

Page 139: ...back is terminated as soon as the actual room temperature reaches the level of the respective room temperature setpoint TRx TRw 20 15 C t TRx 2371D08 TRw ON OFF H t TRx Actual value of the room temperature TRw Room temperature setpoint H Quick setback During quick setback the heating circuit pump will be deactivated and there will be no demand for heat This means that the room temperature falls qu...

Page 140: ...is triggered as soon as the actual d h w temperature falls below the reduced d h w setpoint line 120 by more than twice the switching differential line 41OEM TBWx TBWR 2 SDBW When the d h w push is triggered the storage tank is charged once until the nominal d h w temperature setpoint operating line 13 is reached Then normal operation according to the d h w heating program is resumed t 2379D10 TBW...

Page 141: ...k made in order to prevent the transfer of heat from the d h w storage tank to the heating system 7 7 Protection against discharging after d h w heating Inadvertent discharging of the d h w storage tank will be prevented The Protection against discharging after d h w heating prevents inadvertent discharging of the d h w storage tank resulting from the pump overrun Together with Protection against ...

Page 142: ...r heat Pump runs when there is demand for heat Pump does not run Q1 Setting 3 Pump runs when there is demand for heat Pump runs when there is demand for heat Pump runs when there is demand for heat Q1 Setting 4 No influence from type of heat demand Pump runs according to the settings made on operating line 122 Q1 Setting 5 Pump does not run Pump runs when there is demand for heat Pump does not run...

Page 143: ...320 Whenever the d h w temperature drops excessively forced charging will be initiated If then the actual value of the d h w temperature falls below 5 C TBWx 5 C the frost protection function for the d h w becomes active the actual value of the d h w temperature exceeds 5 C by more than one d h w switching differential line 41OEM TBWx 5 C SDBW the frost protection function for d h w will be termin...

Page 144: ...d up a cascade of up to 16 heat sources modulating multi stage or mixed Where shown the applications require proper hydraulic decoupling between heat generation and heat consumption since the volumetric flows on both sides vary and are different from one another The simplest hydraulic decoupling method is the use of a sufficiently large pressureless header bypass hydraulic decoupler about two to t...

Page 145: ...isplay of plant type 27 Heating curve line 17 inactive Pump function Q1 line 95 1 heating circuit pump or no pump This application requires the heat demand signal from a consumer to release heat generation LPB capable controllers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 N1 B3 B9 B70...

Page 146: ... Display of plant type 28 Heating curve line 17 inactive Pump function Q1 line 95 1 heating circuit pump or no This application requires the heat demand signal from a consumer or d h w heating to release heat generation LPB capable controllers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H...

Page 147: ...his application requires the heat demand signal from a consumer to release heat generation LPB capable controllers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 A heat demand signal from the d h w storage tank releases only that boiler to which the storage tank is hydraulically connected...

Page 148: ...mp for HC only or 3 primary pump for HC and d h w Heat generation is released by the heat demand signal from a consumer LPB capable controllers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 When there is no heat demand signal from the consumers no LPB capable controllers connected and no...

Page 149: ...1 line 95 3 primary pump for HC and d h w Heat generation is released by the heat demand signal from a consumer or d h w heating LPB capable controllers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 When there is no heat demand signal from the consumers no LPB capable controllers connect...

Page 150: ...e 95 2 primary pump for HCs only Heat generation is released by the heat demand signal from a consumer or d h w heating LPB capable controllers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 When there is no heat demand signal from the consumers no LPB capable controllers connected and no...

Page 151: ...trollers signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 When there is no heat demand signal from the consumers no LPB capable controllers connected and no possibility to use input H1 the controller itself can generate a weather compensated flow temperature adjustment of heating curve with...

Page 152: ...B10 B70 2379S34 Type of unit BMU 1 BMU 2 BMU 3 BMU 4 RVA47 320 Display of plant type 34 Heating curve line 17 2 5 40 Pump function Q1 line 95 1 heating circuit pump Other LPB capable controllers on the consumer side signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 L N Q1 F1 N1 Q3 B3 B9 B70 ...

Page 153: ... 2 3 B10 B70 2379S35 B3 Type of unit BMU 1 BMU 2 BMU 3 BMU 4 RVA47 320 Display of plant type 35 Heating curve line 17 2 5 40 Pump function Q1 line 95 1 heating circuit pump Other LPB capable controllers on the consumer side signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 L N Q1 F1 N1 Q3 B3...

Page 154: ...pump Other LPB capable controllers on the consumer side signal the RVA47 320 their current heat demand directly via LPB Controllers not suited for use with the LPB can deliver their heat demand signal via input H1 When there is only a heat demand signal from the d h w storage tank heating circuits do not currently call for heat the boiler put into operation is only that to which the storage tank i...

Page 155: ... 3 BMU 4 RVA47 320 Display of plant type 65 Heating curve line 17 inactive or 2 5 40 Pump function Q1 line 95 5 pump H1 Other LPB capable controllers on the consumer side signal the RVA47 320 their current heat demand directly via LPB The heat demand signal for the pump heating circuit is generated via input H1 In addition the controller itself can generate a weather compensated flow temperature s...

Page 156: ...pe of unit BMU 1 BMU 2 BMU 3 BMU 4 RVA47 320 Display of plant type 66 Heating curve line 17 inactive or 2 5 40 Pump function Q1 line 95 5 pump H1 Other LPB capable controllers on the consumer side signal the RVA47 320 their current heat demand directly via LPB The heat demand signal for the pump heating circuit is generated via input H1 In addition the controller itself can generate a weather comp...

Page 157: ...trollers on the consumer side signal the RVA47 320 their current heat demand directly via LPB The heat demand signal for the pump heating circuit is generated via input H1 In addition the controller itself can generate a weather compensated flow temperature setting the heating curve to a valid value When there is only a heat demand signal from the d h w storage tank heating circuits do not current...

Page 158: ...1 Heating circuit pump primary pump B70 Cascade return temperature sensor M Ground sensors Q3 D h w charging pump B3 D h w temperature sensor control thermostat H1 input H1 LPB Local Process Bus ALBATROS process bus N1 ALBATROS controller RVA47 320 PPS Point to point interface ALBATROS peripheral bus BMU Boiler Management Unit burner control with additional management functions The connection diag...

Page 159: ...ding Technologies Basic Documentation RVA47 320 CE1P2379E HVAC Products Dimensions 15 07 2002 9 Dimensions 96 96 9 3 81 17 4 11 6 91 x 91 2379M100 96 2 10 92 0 8 0 92 0 8 0 96 92 0 8 0 2371M02 188 96 Room unit Panel cutout ...

Page 160: ...ironment Operation to IEC 721 3 3 class 3M2 Storage to IEC 721 3 1 class 1M2 Transport to IEC 721 3 2 class 2M2 To EN 60730 par 11 4 11 4 1b Voltage range AC 24 230 V Nominal current AC 0 02 2 2 A Switch on peak max 10 A for max 1 s Fusing max 10 A Perm cable length for PPS Telephone wire 0 8 mm dia 2 wire interchangeable Max cable length central unit peripheral unit 75 m Max total cable length su...

Page 161: ... at 0 C QAD21 Cascade return temperature sensor Ni 1000 Ω at 0 C QAD21 buffer storage tank sensor Ni 1000 Ω at 0 C QAZ21 H1 as an analog input with safety extra low voltage SELV UH1 12 24 V contact open IH1 2 5 mA contact closed H1 as an analog input with safety extra low voltage SELV Uin 0 10 V für 0 130 C Rin 100 kΩ max ratings 20 V 20 mA Backup of time switch 12 hours Weight approx 0 5 kg Softw...

Page 162: ...ating mode 107 changeover temperature heating circuit 44 chimney sweep 108 136 clock mode 103 Clock setting 37 103 communication status 101 communication via BUS 101 communication via LPB 99 Composite outside temperature 65 constant for quick setback 116 contact H1 106 110 111 continuous display 134 control of the burner 136 D D h w temperature setpoint 67 d h w switching times 50 D h w operating ...

Page 163: ...itation of the boiler temperature setpoint 112 Maximum limitation of the flow temperature setpoint 79 maximum nominal setpoint of d h w temperature 123 maximum value of the heat demand signal DC 0 10 V 111 minimum demand for heat 106 minimum limit of output range 131 minimum limitation boiler return temperature 113 minimum limitation of flow temperature setpoint 79 Minimum limitation of the boiler...

Page 164: ...7 Room temperature setpoint 69 Room unit 58 Rücksetzen der Zeitprogramme 49 running time stragety 127 129 S screw plug in strips 11 segment address 100 segment controller 99 with master function 99 setpoint boost for d h w heating 90 setpoint of the cascade flow temperature 67 setpoint of the legionella function 125 Setting the clock 37 Shifting priority 92 shortened heating up time 117 slope of t...

Page 165: ... 8 Short description Text changed 9 Features Group formed to heating circuit and heat generation 12 Range Burner controls LGM and OCI12 deleted LMU and OCI42 inserted 22 Line No 3 and 4 inserted 25 Footnote for lines 90 94 Lines 107 and 108 inserted 27 Footnote 1 inserted 29 Footnote for lines 1 25 28 30 Footnote 1 inserted 39 Lines 3 and 4 description inserted 55 Example Graphic and Note changed ...

Page 166: ...tion RVA47 320 CE1P2379E Landis Staefa Division 15 07 2002 Siemens Building Technologies AG HVAC Products Gubelstrasse 22 CH 6301 Zug Tel 41 41 724 24 24 Fax 41 41 724 35 22 www landisstaefa com 1999 Siemens Building Technologies AG Änderungen vorbehalten ...

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