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Siemens Building Technologies

Basic Documentation RVL471

CE1P2524E

HVAC Products

12 Function block "Boiler"

23.10.2002

T

Kw

+ 0,5

*

SD

0

1

2

522D

1

4

T

K

T

Kw

T

Kw

- 0,5

*

SD

T

Kx

t

Y

B

SD

Switching differential

t

Time

TKx

Boiler temperature

TKw Boiler temperature setpoint
TKx

Actual value of boiler temperature

Y

B

Burner control signal

When controlling a single-stage burner, the reset limit of the second stage should be
set to zero.

12.4.2

Control with a 2-stage burner

For 2-position control with a 2-stage burner, the variables that can be set are the
switching differential and the minimum burner running time – which now apply to both
stages – plus the following variables:

•

The release integral (FGI) for the second stage. This is the variable generated from the

temperature (T) and time (t). If the maximum limit is exceeded, the second burner
stage is released and can switch on, provided the minimum waiting time for the second
stage has elapsed. Prerequisite is that the minimum locking time for the second stage
has elapsed.

FGI =

∆

T dt

t

0

∫

where:

∆

T = ( w

−

0.5

*

SD

−

x ) > 0

•

The reset limit (RSI). This is the variable generated from the temperature (T) and time

(t). If the maximum limit is exceeded, the burner will be locked and switches off

RSI =

∆

T dt

t

0

∫

where:

∆

T = ( x

−

w + 0.5

*

SD ) > 0

•

The minimum locking time for the second stage, which is the period of time on comple-

tion of which the second stage can switch on at the earliest

The controller compares the actual value of the flow temperature with the setpoint. If it
falls below the setpoint by half the switching differential (x < w

−

0.5

*

SD), the first

burner stage will be switched on. At the same time, the minimum waiting time for the
second burner stage commences and the release integral is being generated. The
controller ascertains for how long and by how much the flow temperature remains be-
low w

−

0.5

*

SD. It continually generates the integral based on the time and the pro-

gression of temperature.
If, on completion of the minimum locking time, the flow temperature is below
w

−

0.5

*

SD, and if the release limit reaches the set maximum limit, the second burner

stage will be released and switched on. The flow temperature starts rising.
When the flow temperature has exceeded the setpoint by half the switching differential
(x = w + 0.5

*

SD), the second burner stage is switched off again, but will remain re-

leased. The first stage continues to operate. If the flow temperature drops, the second
stage will be switched on again at x < w

−

0.5

*

SD. The setpoint is now maintained by

the second burner stage.

Note

Setting parameters

Control process

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Содержание RVL471

Страница 1: ...Edition 2 2 Controller series C CE1P2524E 23 10 2002 Siemens Building Technologies HVAC Products RVL471 Heating and Domestic Hot Water Controller Basic Documentation ...

Страница 2: ...2 118 Siemens Building Technologies Basic Documentation RVL471 CE1P2524E HVAC Products 23 10 2002 ...

Страница 3: ...mbinations 16 3 2 2 Heating circuit type 1 space heating with mixing valve 17 3 2 3 Heating circuit type 2 space heating with boiler 17 3 2 4 Heating circuit type 3 space heating with district heat 18 3 2 5 Heating circuit type 4 precontrol with mixing valve 18 3 2 6 Heating circuit type 5 precontrol with boiler 18 3 2 7 Heating circuit type 6 precontrol with district heat 19 3 2 8 D h w plant typ...

Страница 4: ...asurement 26 4 2 2 Handling faults 27 4 3 Outside temperature B9 27 4 3 1 Measurement 27 4 3 2 Handling faults 27 4 4 Primary return temperature B7 27 4 4 1 Measurement 27 4 4 2 Handling faults 27 4 5 Secondary return temperature B71 28 4 5 1 Measurement 28 4 5 2 Handling faults 28 4 6 D h w flow temperature B3 28 4 6 1 Measurement 28 4 6 2 Handling faults 28 4 7 D h w storage tank temperature B31...

Страница 5: ...k Space heating 37 10 1 Operating lines 37 10 2 ECO function 37 10 2 1 Compensating variables and auxiliary variables 37 10 2 2 Heating limits 38 10 2 3 Mode of operation 38 10 2 4 Operating modes and operating states 39 10 3 Room temperature source 39 10 4 Optimization 39 10 4 1 Definition and purpose 39 10 4 2 Fundamentals 39 10 4 3 Process 40 10 4 4 Room model temperature 40 10 4 5 Optimum stop...

Страница 6: ...on of the boiler temperature 51 12 3 2 Minimum limitation of the boiler temperature 52 12 3 3 Actions during d h w heating 52 12 4 2 position control 52 12 4 1 Control with a single stage burner 52 12 4 2 Control with a 2 stage burner 53 12 4 3 Frost protection for the boiler 54 12 4 4 Protective boiler startup 55 12 4 5 Protection against boiler overtemperatures 55 12 5 Operating mode of pump M1 ...

Страница 7: ...he holiday period 65 16 4 Frost protection for d h w 66 16 4 1 Frost protection in the d h w storage tank 66 16 4 2 Frost protection in the d h w storage tank flow 66 16 4 3 Frost protection for the secondary d h w flow 66 17 Function block Release of d h w heating 67 17 1 Operating line 67 17 2 Release 67 17 2 1 Function 67 17 2 2 Release programs 67 17 2 3 D h w heating during the holiday period...

Страница 8: ...at exchanger 78 21 1 Operating line 78 21 2 Description 78 22 Function block Multi functional relay 79 22 1 Operating lines 79 22 2 Functions 79 22 2 1 No function 79 22 2 2 Outside temperature switch 79 22 2 3 ON OFF according to the time switch 80 22 2 4 Relay energized in the event of fault 80 22 2 5 Relay energized during occupancy time 80 22 2 6 Relay energized during occupancy time including...

Страница 9: ...low alarm 89 25 4 3 Manual overriding of operating mode contact H1 90 25 4 4 Pump overrun 90 25 4 5 Pump kick 90 25 4 6 Winter summertime changeover 90 25 4 7 Gain of locking signal 91 25 5 Entries for LPB 92 25 5 1 Source of time of day 92 25 5 2 Outside temperature source 92 25 5 3 Addressing the devices 93 25 5 4 Bus power supply 93 25 5 5 Bus loading number 94 25 6 Heat demand output DC 0 10 V...

Страница 10: ...ss rights 103 28 2 Commissioning 103 28 2 1 Installation instructions 103 28 2 2 Operating lines 103 28 3 Installation 104 28 3 1 Mounting location 104 28 3 2 Mounting choices 104 28 3 3 Electrical installation 104 29 Engineering 105 29 1 Connection terminals 105 29 1 1 Low voltage side 105 29 1 2 Mains voltage side 105 29 2 Connection diagrams 106 29 2 1 Low voltage side 106 29 2 2 Mains voltage ...

Страница 11: ...used to pass the heat demand signal to other systems A multifunctional relay provides additional control functions if required For direct adjustment of the heating curve the well known bar is used Digital ad justment of the heating curve is possible also A setting knob is used for making room temperature readjustments All the other parameters are set digitally based on the operating line principle...

Страница 12: ...ication is possible with the following units All LPB compatible controllers supplied by HVAC Products SYNERGYR central unit OZW30 software version 3 0 or higher 1 3 5 Passing on of heat demand signal The scalable DC 0 10 V signal can be used to pass the heat demand signal to other devices in the system 1 3 6 Documentation Type of documentation Ordering number for English Data Sheet RVL471 CE1N2524...

Страница 13: ...ited for use with all standard heating systems such as Radiators Convectors Underfloor heating systems Ceiling heating systems Radiant panels 2 4 Functions The RVL471 is used if one or several of the following functions is are required Weather compensated flow temperature control Flow temperature control via a modulating seat or slipper valve or boiler temperature control through direct control of...

Страница 14: ...oom unit and external switches Service functions Frost protection for the plant the boiler and the house or building Minimum or maximum limitation of the return temperature DRT limitation Minimum and maximum limitation of the flow temperature Maximum limitation of the room temperature Periodic pump run Pump overrun Maximum limitation of the rate of setpoint increase Flow alarm Legionella function ...

Страница 15: ...urce cascades or heat generation systems 3 1 2 Plant types with regard to d h w heating In terms of d h w the following plant types are available D h w plant type 0 no d h w D h w plant type 1 storage tank with charging pump D h w plant type 2 storage tank with mixing valve D h w plant type 3 storage tank with diverting valve D h w plant type 4 instantaneous d h w heating via heat exchanger D h w ...

Страница 16: ...mmersion heater 2 0 Space heating with boiler No d h w 2 1 Space heating with boiler Storage tank with charging pump 2 2 Space heating with boiler Storage tank with mixing valve 2 3 Space heating with boiler Storage tank with diverting valve 2 5 Space heating with boiler Only electric immersion heater 3 0 Space heating with district heat No d h w 3 1 Space heating with district heat storage tank w...

Страница 17: ...3 2 2 Heating circuit type 1 space heating with mixing valve A6 B5 B7 2524S01 1 2 4 0 5 Space heating with weather compensated flow temperature control 3 position control acting on the mixing valve of the heating zone Outside temperature signal from own sensor or data bus With or without room influ ence Heating up and setback according to the heating program 3 2 3 Heating circuit type 2 space heat...

Страница 18: ...from own sensor or data bus With or without room influ ence Heating up and setback according to the heating program 3 2 5 Heating circuit type 4 precontrol with mixing valve 2524S04 B7 1 2 0 5 Precontrol with demand dependent control of the main flow temperature 3 position control acting on the mixing valve in the main flow Heat demand signal from data bus No heating program 3 2 6 Heating circuit ...

Страница 19: ...ide d h w heating 3 2 9 D h w plant type 1 d h w storage tank with charging pump B31 B32 M3 M4 2524S07 K6 Charging of d h w storage tank through control of the charging pump Acquisition of the d h w temperature with one or 2 sensors or thermostats Circulating pump and electric immersion heater are optional 3 2 10 D h w plant type 2 d h w storage tank with mixing valve 2524S08 B3 Y7 B31 B32 M3 M4 K...

Страница 20: ... h w tempera ture in the heat exchanger s secondary flow Circulating pump is optional but strongly recommended 3 2 13 D h w plant type 5 only electric immersion heater M4 2524S11 K6 Charging of d h w storage tank only through release of the electric immersion heater No control of d h w heating by the controller Circulating pump is optional A6 Room unit QAW50 or QAW70 E2 Consumer space B1 Flow boil...

Страница 21: ...e heating with district heat 3 position control acting on valve B7 B71 2524S03 A6 B5 Y1 N1 2524S08 B3 Y7 B31 B32 M3 M4 K6 2 D h w heating through control of the mixing valve Possible d h w com binations Õ2 4 1 3 0 5 4 Precontrol with mix ing zone heat de mand signal via data bus 2524S04 B7 2524S09 Y3 B31 B32 M4 K6 3 D h w heating through control of the diverting valve Possible d h w combi nations ...

Страница 22: ...ionella function Enduser space heating Enduser d h w Enduser general Plant type Enduser Space heating 3 position actuator heating circuit Boiler Setpoint limitation of return temperature District heating Max limitation of d h w return temperature Basic settings d h w Release of d h w charging D h w storage tank 3 position d h w actuator D h w priority and flow temperature setpoint Multifunctional ...

Страница 23: ...ECO function No holiday mode Remote operation from a room unit not possible Frost protection is ensured 3 4 3 Continuously NORMAL heating Continuous heating to NORMAL temperature No ECO function No holiday mode Remote operation via room unit not possible Frost protection is ensured 3 4 4 STANDBY Heating is switched off but is ready to operate Frost protection is ensured 3 5 D h w operating modes D...

Страница 24: ...tion D h w slipper seat valve This valve is driven to the fully closed position in which case the closing time is five times the set running time Then it is deactivated Circulating pump M4 Continuously running Electric immersion heater K6 Continuously released Multifunctional relay Continuously energized Manual operation also negates any overriding of the controller s operating mode bridging of H1...

Страница 25: ... 2 operating states with the exception of operating mode Continuously NORMAL heating only one operating state possi ble When the ECO function is active and in the case of quick setback the operating state is always OFF When the operating state is ON there is a maximum of 3 operational levels depending on the operating mode The operational level is determined by the heating program and the holiday ...

Страница 26: ...QAA24 operating line 65 2 In the event of a short circuit or open circuit the control continues to operate with the room model depending on the function An error message will be generated Average value operating line 65 3 In the event of a short circuit or open circuit in one of the 2 measuring circuits the control continues to operate with the normally working measuring circuit An error message w...

Страница 27: ...oller responds as follows depending on the outside temperature source Controller not connected to the data bus LPB The control operates with a fixed value of 0 C outside temperature An error message will be generated Controller connected to the data bus LPB If the outside temperature is available via data bus it will be used An error message will not be generated this is the normal state in interc...

Страница 28: ...ature DRT limitation will be deactivated An error message will be generated 4 6 D h w flow temperature B3 4 6 1 Measurement The d h w flow temperature is acquired with a sensor having a sensing element LG Ni 1000 4 6 2 Handling faults If there is a short circuit or open circuit in the measuring circuit the d h w will no longer be heated The charging pump is deactivated and the actuating device sli...

Страница 29: ... h w storage tank is always charged when sensor B3 d h w flow works normally One d h w storage tank thermostat operating line 126 2 If in measuring circuit B31 there is neither an open circuit thermostat open nor a short circuit thermostat closed an error message will be generated The d h w will no longer be heated and the charging pump is deactivated Exception With plant type x 2 the d h w storag...

Страница 30: ... temperature of 5 C C 60 20 120 5 2 Setpoints 5 2 1 General The setpoints of the NORMAL and the REDUCED room temperature and of frost pro tection for the plant holiday mode are entered directly in C room temperature They are independent of whether or not the control uses a room temperature sensor 5 2 2 Frost protection for the building The lowest valid room temperature setpoint always corresponds ...

Страница 31: ...gram A maximum of 8 holiday periods per year can be programmed At 00 00 of the first day of the holiday period changeover to the setpoint for frost protection holiday mode takes place At 24 00 of the last day of the holiday period the RVL471 will change to NORMAL or REDUCED heating in accordance with the time switch settings The settings of each holiday period will be cleared as soon as the respec...

Страница 32: ... the setpoint of the thermostat or if 2 thermostats are used of both thermostats If there is a deviation the charging temperature cannot be correctly cal culated charging temperature NORMAL setpoint operating line 26 boost of charging temperature operating line 127 If d h w heating is switched to the electric immersion heater the setpoint adjustment is inactive in that case since the thermostat of...

Страница 33: ...time switch program for the circulating pump As a time switch program for the release of d h w heating As a time switch program for the multi functional relay Switching program 2 of the RVL471 affords a maximum of three ON periods per day Also every day of week may have different ON periods As with the heating program it is not the switching times that are to be entered but the periods of time dur...

Страница 34: ...r short circuit in the measuring circuit of the d h w sensor B3 60 Open circuit or short circuit in the measuring circuit of the room sensor B5 61 Open circuit or short circuit in the measuring circuit of the room unit s sensor A6 62 Wrong room unit connected 81 Short circuit on data bus LPB 82 Bus address on the data bus LPB exists several times 100 2 clock masters on the data bus LPB 120 Flow al...

Страница 35: ... Plant type 1 1 1 0 6 5 8 2 General When commissioning the plant the respective plant type must be entered first This ensures that the functions required for the specific type of plant the parameters and operating lines for the settings and displays will be activated All plant specific variables and operating lines existing for the other plant types will then be hidden They will not be displayed E...

Страница 36: ...tegral is a variable generated from the progression of the cascade flow temperature and time t If the variable falls below the setpoint the difference will be communicated to the cascade master as the heat deficit KFI T dt t 0 where T TVKw 0 5 SD TVKx 0 TVKw Flow temperature setpoint of the cascade TVKx Actual value of cascade flow temperature SD Switching differential of the boiler t Time 9 2 2 B...

Страница 37: ...ing system operates only or consumes energy only when required 10 2 1 Compensating variables and auxiliary variables As compensating and auxiliary variables the ECO function takes into account the de velopment of the outside temperature and the heat storage capacity of the building The following variables are taken into consideration The building time constant this is a measure of the type of buil...

Страница 38: ...g or OFF holidays frost protection In both cases the heating limit is the outside temperature at which the heating shall be switched on and off The switching differential is 1 C 10 2 3 Mode of operation The heating will be switched off when one of the 3 following conditions is satisfied The actual outside temperature exceeds the current ECO heating limit The composite outside temperature exceeds t...

Страница 39: ...re source 0 No room sensor 1 Room unit at terminal A6 2 Room sensor connected to terminal B5 3 Average of devices connected to A6 and B5 A Automatic selection Operating line 65 also displays the room temperature source actually used by the con troller ACTUAL ACTUAL 0 controller operates without a sensor ACTUAL 1 controller operates with a room unit connected to terminal A6 ACTUAL 2 controller oper...

Страница 40: ...orward shift of the switching points In this ways optimization can also detect changes made to the house or building and to take them into consideration The learning process always concentrates on the first heating period per day When no room temperature sensor is used the room model only allows optimum start control Optimization operates with fixed values no learning process based on the set maxi...

Страница 41: ...e the control switches to the REDUCED setpoint Optimization calculates the changeover time such that at the end of occu pancy the room temperature will lie 0 5 C below the setpoint of NORMAL heating optimum shutdown By entering 0 hours as the maximum optimum shutdown optimum stop control can be deactivated 10 4 6 Quick setback When changing from the NORMAL temperature to a lower temperature level ...

Страница 42: ...f previously quick setback took place Optimum start control can be deactivated by entering 0 hours as the maximum heating up period 10 4 8 Boost heating For boost heating a room temperature setpoint boost can be set After changeover to the NORMAL temperature the higher room temperature setpoint applies resulting in an appropriately higher flow temperature setpoint D h w heating during boost heatin...

Страница 43: ...he room temperature setpoint will be lowered by 4 C Maximum limitation of the room temperature is independent of the setting used for the room influence If the room temperature lies above the limit value the display shows The reduction of the flow temperature setpoint TVw is calculated as follows TVw K TRw 1 s 1 0 5 0 5 1 1 5 2 2 5 3 TRw TR s Heating curve slope TRw Reduction of the room temperatu...

Страница 44: ...etpoint TRx Actual value of the room temperature TR Room temperature deviation TRw TRx TVw Change of flow temperature setpoint VF Gain factor 10 6 Heating curve 10 6 1 Purpose With the space heating systems plant types 1 x 2 x and 3 x flow temperature con trol is always weather compensated The assignment of the flow temperature setpoint to the prevailing outside temperature is made via the heating...

Страница 45: ...onally when the difference between radiator and room temperature increases For this reason the radiators heat exchanger characteristic is deflected The heating curve s deflection takes these characteristics into consideration In the range of small slopes e g with underfloor heating systems the heating curve is practically linear due to the small flow temperature range and therefore corresponds to ...

Страница 46: ...10 100 0 10 10 0 30 TRw TA TV Parallel displacement of heating curve s Slope TA Outside temperature TV Flow temperature TRw Room temperature setpoint 10 6 5 Display of setpoints 2 current setpoints result from the basic setting the position of the setting knob and if made the entry on operating line 72 which can be called up on operating line 166 TV1 resultant flow temperature setpoint at an outsi...

Страница 47: ...oller Flow temperature setpoint TVw Setpoint on operating line 165 Parallel displacement of heating curve operating line 72 LPB SYNERGYR OZW30 Room setpoint or s 1 s 20 C Operating line 1 2 or 3 1 s 2524B 01e LPB Data bus OZW30 SYNERGYR central unit s Slope Active only with room unit level The impact of the central unit OZW30 is described in section 27 1 4 Combination with SYNERGYR central unit OZ...

Страница 48: ... 140 83 Maximum rate of flow temperature increase C 1 600 84 Flow temperature boost mixing valve heat exchanger C 10 0 50 85 Actuator running time s 120 30 873 86 P band of control Xp C 32 0 1 100 87 Integral action time of control Tn s 120 30 873 11 2 Limitations 11 2 1 Flow temperature limitations The following settings can be made Maximum limitation of the flow temperature At the limit value th...

Страница 49: ... 6 x Limitation of the rate of increase is always active 3 1 3 3 Limitation of the rate of increase only acts with shifting or parallel d h w priority 11 3 3 position control 3 position control operates as weather or demand compensated PI flow temperature control The flow temperature is controlled through a modulating actuating device slip per or seat valve Owing to the I part there is no control ...

Страница 50: ...temperature controller wN2 Setpoint of flow temperature controller w Excess mixing valve temperature set on controller N2 11 5 Pulse lock If during a period of time that equals five times the running time the actuator has re ceived only closing pulses additional closing pulses delivered by the controller will be locked This minimizes the strain on the actuator For safety reasons the controller del...

Страница 51: ...th manual shutdown The boiler will be shut down when there is no demand for heat and operating mode standby is selected setting 0 on operating line 91 With automatic shutdown The boiler will be shut down when there is no demand for heat irrespective of the selected operating mode setting 1 on operating line 91 Boiler operating modes when there is no demand for heat Controller s operat ing mode Boi...

Страница 52: ...ays and indicated by LEDs 12 4 1 Control with a single stage burner For 2 position control with a single stage burner the variables that can be set are the switching differential and the minimum burner running time The controller compares the actual value of the boiler temperature with the setpoint If the boiler temperature falls below the setpoint by half the switching differential the burner wil...

Страница 53: ...e burner will be locked and switches off RSI T dt t 0 where T x w 0 5 SD 0 The minimum locking time for the second stage which is the period of time on comple tion of which the second stage can switch on at the earliest The controller compares the actual value of the flow temperature with the setpoint If it falls below the setpoint by half the switching differential x w 0 5 SD the first burner sta...

Страница 54: ...uration of the deviation that is considered but also its extent when deciding whether the second stage shall be switched on or off SD Switching differential w Boiler temperature setpoint x Actual value of boiler temperature 1 0 INT max FGB2 1 0 YB2 t FGI RSI 2522D09 0 1 0 t t t t YB1 max TKw 0 5 SD TKw 0 5 SD TKx RSI FGB2 Release of burner stage 2 FGI Release integral INT Integral RSI Reset integr...

Страница 55: ...therwise the locking signal will become invalid for at least 15 minutes On completion of the 15 min utes protective boiler startup will become active again as soon as the boiler tempera ture gradient turns positive If the boiler carries out protective boiler startup the boiler temperature controller s dis play shows Protective boiler startup cannot be deactivated Section 25 4 7 Gain of locking sig...

Страница 56: ...ing circuits allow the pumps to continue running D h w plant type 4 instantaneous d h w heating via heat exchanger does not respond to forced signals since it can draw heat from the boiler only if there is demand for d h w If the boiler sets the forced signal to zero the loads and heat exchanges that have responded to the forced signal respond as follows They close their mixing valves Their pumps ...

Страница 57: ...to the respective sections the display shows when pressing buttons and 13 3 Minimum limitation of the return temperature This function block ensures minimum limitation of the boiler return temperature where possible or required This applies to the following plant types Plant type 1 x space heating with mixing valve Plant type 4 x precontrol with mixing valve Plant type 5 x precontrol with boiler M...

Страница 58: ... 2 Plant type 1 0 Controller 3 Plant type 1 1 Critical locking signal Controller 2 shuts the heating circuit mixing valve Controller 3 shuts the heating circuit mixing valve and deacti vates the d h w charging pump LPB 2524B07e Setting operating line101 50 C return sensor connected Setting operating line 101 no own return sensor connected Setting operating line 101 no own return sensor connected C...

Страница 59: ...tegral action time of maximum limitation of return tem perature min 30 0 60 115 Maximum limitation of return temperature differential C 0 5 50 116 Minimum stroke limitation Ymin function min 6 1 20 14 2 Limitations 14 2 1 Maximum limitation of the primary return temperature The primary return temperature uses maximum limitation to make certain that too hot water will not be fed back to the distric...

Страница 60: ...ority over minimum limitation of the flow temperature This function can be deactivated on operating line 101 If the return temperature is limited the display shows 14 2 2 Maximum limitation of return temperature differential DRT limitation For the differential of primary return and secondary return temperature a maximum limitation can be set For this purpose a temperature sensor sensing element LG...

Страница 61: ...limitation suppression of hydraulic creep To avoid measurement errors in connection with heat metering due to extremely small flow rates the flow through the two port valve in the primary return can be limited to a minimum Ymin function If the valve is supposed to open below the minimum stroke position it will be fully closed and remains closed until the set closing time has elapsed The first open...

Страница 62: ...e primary return temperature of the d h w circuit has its own maximum limitation in order to be able to differentiate between the maximum limit value during d h w heating and the limit value during space heating only make certain that too hot water will not be fed back to the district heating network minimize piping losses of the district heating utility satisfy the regulations of the district hea...

Страница 63: ...on of the return temperature d h w 23 10 2002 This function can be deactivated on operating line 117 In that case no maximum limi tation of the return temperature is provided during d h w heating If the function is active the display shows This maximum limitation has priority over minimum limitation of the flow temperature ...

Страница 64: ...r the heating circuits of the con trollers with the same segment number that are connected to the data bus LPB 2 D h w heating is provided for all heating circuits of the controllers connected to the data bus LPB The setting is required in connection with operating lines 122 circulating pump pro gram and 123 release of d h w heating 16 3 Program for the circulating pump 16 3 1 General mode of oper...

Страница 65: ...or of the circulating pump when con trollers A B C and D are interconnected via data bus Operating line 121 Operating line 122 Con trollers Operating mode Heating program holidays A 06 00 18 00 1 B 07 00 23 00 C 07 00 22 00 2 D 03 00 22 00 HOLIDAYS The circulating pump runs from 06 00 00 to 23 00 Operating line 121 Operating line 122 Con trollers Operating mode Heating program holidays A 06 00 00 ...

Страница 66: ...s a heat requisition to the primary control ler The switch off temperature is at 5 C plus the switching differential set on operating line 128 When using thermostats there is no frost protection for the d h w storage tank 16 4 2 Frost protection in the d h w storage tank flow This type of frost protection is used with plant types x 2 If the d h w flow temperature acquired with sensor B3 falls belo...

Страница 67: ...ature at sensor B3 will be reached This function makes it possible to reduce the d h w temperature during nonoccupancy times to the REDUCED setpoint at night or to shut it down e g during holiday peri ods If d h w heating in the summer takes place alternately with an electric immersion heater the latter will be released continuously independent of the setting made on operating line 123 that is 24 ...

Страница 68: ...se of d h w heating is explained using 2 examples in which controllers A B C and D are interconnected via the data bus Operating line 121 Operating line 123 Con trollers Operat ing mode Heating program opti mization holidays Release A 06 00 18 00 no optimi zation B 07 00 23 00 C 07 00 22 00 optimum start control shifts forward by 2 hours 2 1 D 03 00 22 00 HOLIDAYS D h w heating is released from 04...

Страница 69: ...ven priority over space heating For this purpose the controller offers 3 types of d h w priority Absolute priority Shifting priority No priority parallel operation In the case of plants using a diverting valve plant types x 3 absolute priority is always present In that case selection of the kind of priority has no impact The priority is provided by delivering locking signals The effect of the lock...

Страница 70: ...riti cal locking signal in the range 0 100 generated If the heat source is located in segment 0 it delivers the locking signal to all controllers in all segments If the heat source is in segment 1 14 it only sends the locking signal to the controllers in the same segment 18 3 3 No priority No priority means parallel operation D h w charging has no impact on the heating circuits 18 4 Flow temperatu...

Страница 71: ... 4 2 D h w With d h w heating the temperature setpoint of the common flow for the d h w and the heating circuit is that required for the d h w circuit Example It is assumed that the mixing heating circuit calls for 80 C and the d h w circuit for 65 C With d h w charging the setpoint of the common flow temperature will then be that of the d h w circuit namely 65 C ...

Страница 72: ...ater 19 2 1 D h w charging with hot water The setting on operating line 125 is 0 The d h w storage tank is charged exclusively with hot water throughout the year 19 2 2 Alternate d h w charging with hot water and electricity The setting on operating line 125 is 1 2 or 3 In the winter the d h w storage tank is charged with hot water from the heating system and in the summer with the electric immers...

Страница 73: ...etpoint TBWx D h w temperature If the d h w storage tank is equipped with thermostats the switch on off temperature is determined by the thermostats Determination of the switch on temperature start of d h w charging Operating line 126 Measurement Switching criterion 0 1 sensor TBWx1 TBWw SDBW 1 2 sensors TBWx1 TBWw SDBW and TBWx2 TBWw SDBW 2 1 thermostat Thermostat contact B31 closed 3 2 thermosta...

Страница 74: ...g starts a counter records the charging time If charging is terminated before the set maximum charging time has expired the counter will be set to zero A new charging cycle can commence at any time However if charging takes longer than the set maximum time charging will be stopped and than locked for the same period of time Then charging will be resumed either until the setpoint is reached or maxi...

Страница 75: ...ated prematurely plant types x 1 and x 2 the changeover valve will be driven to the position Heating circuit plant types x 3 If the storage tank is equipped with two sensors the sensor measuring the higher tem perature is considered The flow temperature is acquired with sensors B1 and B3 depending on the type of plant or obtained from the data bus LPB as the common flow temperature If the flow tem...

Страница 76: ...ff d h w heating is switched off due to holiday mode d h w heating is locked because the maximum charging time has been exceeded Manually initiated charging of the d h w storage tank is stopped only if the NORMAL d h w temperature setpoint is reached or if the maximum charging time is exceeded After manual charging d h w heating always remains switched on irrespective of whether or not it was swit...

Страница 77: ...ting line 132 is added to the setpoint of d h w flow sensor B3 Plant type x 4 heat exchanger For the temperature demand to the primary controller heat source the value of oper ating line 132 is added to the setpoint of d h w flow sensor B3 20 2 2 D h w temperature control The control process depends on the type of plant Plant type x 2 The control mode is PI the flow temperature is controlled by th...

Страница 78: ...rivative action time d h w heating via heat exchanger With plant types x 4 this function block permits entry of the D part with d h w control 21 1 Operating line Line Function parameter Unit Factory setting Range 137 Derivative action time of control Tv C 0 0 255 21 2 Description The 3 position controller provides PID mode The derivative action time Tv D part can be set on operating line 137 ...

Страница 79: ...ns can be assigned to the multi functional relay Operating line 141 Function 0 No function 1 Outside temperature switch 2 ON OFF according to the time switch 3 Relay energized in the event of fault 4 Relay energized during occupancy time according to the heating program with no optimization 5 Relay energized during occupancy time according to the heating program including optimizations 6 Relay ene...

Страница 80: ...ergized during occupancy time If the own heating circuit is maintained at operational level independent of the operating mode the multifunctional relay is energized In operating mode no consideration is given to optimum start stop control With the plant types that do not have their own heating circuit 4 x 5 x and 6 x the setting Relay energized during occupancy time makes no sense In that case the...

Страница 81: ...etting 2 every week on Tuesday etc 23 1 2 Time of legionella function The time of day the legionella function shall be activated can be set on operating line 148 23 1 3 Dwelling time at the legionella setpoint Operating line 149 is used to determine for what period of time the actual d h w tem perature must lie above the legionella setpoint operating line 130 to satisfy the re quirement of this fu...

Страница 82: ... the legionella setpoint will again be triggered since the legionella function is still released The behavior of the legionella function as a function of the d h w temperature is as follows TBWw TBWw SDBW TBWw SDBW 2K TBWx ON OFF ON OFF ON OFF TBWx t 2526D03 TBWx D h w temperature TBWw D h w temperature setpoint SDBW Switching differential of d h w charging t Time If a maximum d h w charging time ...

Страница 83: ... mm 22 00 00 00 24 00 154 Start of second ON period hh mm 00 00 24 00 155 End of second ON period hh mm 00 00 24 00 156 Start of third ON period hh mm 00 00 24 00 157 End of third ON period hh mm 00 00 24 00 24 2 Function Switching program 3 of the RVL471 affords a maximum of 3 ON periods per day Also every day of week may have different ON periods As with the heating program it is not switching t...

Страница 84: ...nt C 15 0 140 169 Device number 0 0 16 170 Segment number 0 0 14 171 Flow alarm hh mm 1 00 10 00 172 Operating mode when terminals H1 M are bridged 0 0 9 173 Gain of locking signal 100 0 200 174 Pump overrun time min 6 0 40 175 Pump kick 0 0 1 176 Winter summertime changeover dd MM 25 03 01 01 31 12 177 Summer wintertime changeover dd MM 25 10 01 01 31 12 178 Clock mode 0 0 3 179 Bus power supply ...

Страница 85: ...ng line 72 The display also shows the 2 flow temperature setpoints TV1 current setpoint at an outside temperature of 15 C TV2 current setpoint at an outside temperature of 5 C With demand compensated control plant types 4 x 5 x and 6 x the display shows TV1 TV2 Operating line 166 Parallel displacement of heating curve operating line 72 1 s 2524B06e TV TAM Heating curve TV2S TV1S 15 C 5 C TV1S TV2S...

Страница 86: ... has the following meaning No radio clock receiver connected Controller has no data bus address Connection interrupted 25 3 Commissioning aids 25 3 1 Simulation of the outside temperature To facilitate commissioning and fault tracing outside temperatures in the range 50 to 50 C can be simulated This simulation has an impact on the actual the composite and the attenuated outside temperature Simulat...

Страница 87: ... Entry of 0 on the operating line Leaving the setting level by pressing button or Leaving the setting level by pressing the Info button or any of the operating mode but tons Automatically after 30 minutes 25 3 3 Sensor test The connected sensors can be checked on operating line 163 In addition if available the current setpoints and limit values are displayed On the display the current setpoints ar...

Страница 88: ... the storage tank temperature sensor thermostat at terminal B31 8 Setpoint of d h w temperature With plant types with no storage tank the display shows Actual value of the storage tank temperature sensor thermostat at terminal B32 Faults in the measuring circuits are displayed as follows short circuit thermostat contact closed open circuit thermostat contact open 25 3 4 Test of H contacts The conn...

Страница 89: ...thin a defined period of time provided there is a demand for heat This period of time can be set on operating line 171 Plant type 1 x 3 x 4 x and 6 x Decisive is the temperature acquired by sensor B1 The switching differential corresponds to the neutral zone 1 C Plant types 2 x and 5 x Decisive is the temperature acquired by sensor B1 The switching differential corresponds to the adjusted switchin...

Страница 90: ...p a common pump overrun time can be set for all pumps associated with the controller with the exception of the circulating pump on operating line 174 In that case the pumps will overrun for the overrun time set or the diverting valve will maintain the charging position during that period of time D h w discharging protection has priority over pump overrun In interconnected plants the time set also ...

Страница 91: ...ll be reduced as a function of the set locking signal gain The mixing valve closes Heating circuit with pump In case of a defined value of the uncritical locking signal the heating circuit pump will be deactivated independent of the set locking signal gain In plants with changeover valve the valve assumes the D h w position Critical locking signals are generated by the boiler temperature controlle...

Страница 92: ...he controller can be readjusted and at the same time readjusts the system time since the change is adopted by the master The controller s time of day is nevertheless automatically and continually matched to the system time System time Adjustment Controller time 3 The time of day on the controller can be readjusted and at the same time readjusts the system time The controller time is used as a pre ...

Страница 93: ...th control processes it is not possible to use all possible device addresses in all types of plant Plant type G 0 S any no bus G 1 S 0 G 1 S 1 14 G 2 16 S any 1 x Permitted Permitted Permitted Permitted 2 x Permitted Permitted Permitted Not permitted 3 0 3 2 3 4 3 5 Permitted Permitted Permitted Permitted 3 1 3 3 Permitted Not permitted Permitted Not permitted 4 x Not permitted Permitted Permitted...

Страница 94: ... available ACTUAL 1 Bus power supply presently available The word BUS appears on the display only when the bus address is valid and when bus power supply is available This means the display indicates whether or not data traffic via the data bus is possible 25 5 5 Bus loading number The bus loading figure E for the LPB of the RVL471 is 7 The total of all E numbers of the devices connected to the sa...

Страница 95: ...play 2 Press buttons and one after the other 3 Now operating line 198 appears in the display The following locking choices are available 0 no locking 1 all settings are locked 2 Only the settings required for the district heat parameters are locked operating lines 101 to 117 After locking all settings the following setting elements remain operative The buttons for selecting the operating lines The...

Страница 96: ... heating circuit Readjustment of room temperature For this purpose the QAW50 has 3 operating elements Operating mode button Economy button also called presence button Knob for room temperature readjustments From the QAW50 the operating mode of theRVL471 can be overridden This is ac complished with the operating mode button and the economy button To enable the room unit to act on the RVL471 the fol...

Страница 97: ...471 temporary overriding with economy button possible Continuously NORMAL or continuously REDUCED heating depending on the economy button STANDBY With the knob of the QAW70 the room temperature setpoint of NORMAL heating can be readjusted by 3 C The adjustment of the room temperature setpoint on the controller s operating line 1 will not be affected by the QAW70 If 1 slave with no remote operation...

Страница 98: ...ted from the mains network and then reconnected the following parameters on the QAW70 will be overwritten with the set tings made on the RVL471 Time of day and weekday Complete heating program Room temperature setpoint of REDUCED heating Room temperature setpoint of REDUCED heating NORMAL d h w temperature setpoint This means that the RVL471 is always the data master 27 1 4 Combination with SYNERG...

Страница 99: ...er devices The heat demand corresponds to the heat requisition in C and in terms of value is identical with the heat requisition that reaches the primary controller via the data bus LPB The temperature value of the heat demand corresponding to 10 V can be set via oper ating line 181 Voltage signals Voltage Temperature when oper ating line 181 80 C Temperature when oper ating line 181 130 C DC 0 V ...

Страница 100: ...ual operation 5 Button for Open valve in manual operation 6 Button for manual operation ON OFF 7 LEDs for Manual operation Valve opens 1st burner stage ON Valve closes 2nd burner stage ON Circulating pump running 8 Button for d h w heating ON OFF ON button lit 9 Sealing facility in the cover 10 Info button for display of actual values 11 Display LCD 12 Setting slider for flow temperature setpoint ...

Страница 101: ...grated the currently active operating mode is indicated by the respective LED A button is used to switch d h w heating on and off By pressing the respective button d h w heating is switched on or off The button is lit when d h w heating is switched on Manual d h w charging is also triggered by pressing the same button For direct setting of the heating curve the little bar is used which has proved ...

Страница 102: ...l function The selection of an operating line and readjustment of the display is always made with a pair of buttons To select and readjust setting values the procedure is the following Buttons Procedure Effect Line selection buttons Press button Selection of the next lower operating line Press button Selection of the next higher operating line Setting buttons Press button Decrease of the displayed...

Страница 103: ...hich give a detailed description of installation wiring and commissioning with functional checks and settings They have been written for trained specialists Each operating line has an empty field in which the selected value can be entered The Installation Instructions should not be thrown away after use but kept together with the plant documentation 28 2 2 Operating lines The most important work t...

Страница 104: ... panel front In the sloping front of a control desk 28 3 2 Mounting choices The RVL471 can be mounted in one of 3 different ways Wall mounting The base is secured to a flat wall with 3 screws Rail mounting The base is snapped on a DIN mounting rail Flush panel mounting The base is fitted in a panel cut out measuring 138 138 mm 1 mm 0 mm The thickness of the front panel may be 3 mm maximum 28 3 3 E...

Страница 105: ...geover contact Operating mode B32 Storage tank sensor thermostat 2 B5 Room sensor B71 Return sensor secondary circuit H4 Minimum stroke limitation Ymin contact H3 Contact for locking the district heat parameters In addition to the standard connection terminals there is an auxiliary terminal M avail able 29 1 2 Mains voltage side N Neutral conductor AC 230 V L Live conductor AC 230 V F1 F4 Input fo...

Страница 106: ...M3 M4 Y7 Q3 Y3 Q4 K6 Y7 Y8 Y3 1 A6 Room unit QAW50 or QAW70 LPB Data bus B1 Flow boiler sensor M1 Heating circuit pump circulating pump B3 D h w flow sensor M3 Charging pump B31 Storage tank sensor thermostat 1 M4 Circulating pump B32 Storage tank sensor thermostat 2 N1 Controller RVL471 B5 Room sensor S1 Remote operation Operating mode B7 Return sensor primary circuit B71 Return sensor secondary ...

Страница 107: ...ting Whichever mounting method is chosen the base must always be mounted and wired first To ensure the orientation will be correct the upper side of both the base and the controller housing carry the marking TOP Both the top and the bottom side of the base has 5 knockout holes for cable entries and there are 10 knock out holes in the floor The controller insert is placed in the base The controller...

Страница 108: ...3 Y3 Q4 K6 AC 0 02 1 2 A Rated current ignition transformer max 1 A during max 30 s Switch on current ignition transformer max 10 A during max 10 ms Bus loading number E LPB 7 Clock reserve 12 h min Perm cable lengths to the sensors thermostats and external contacts Copper cable 0 6 mm dia max 20 m Copper cable 1 0 mm2 max 80 m Copper cable 1 5 mm2 max 120 m Perm cable lengths to the room unit Cop...

Страница 109: ... commissioning aids 86 communication 98 compensating variables and auxiliary variables 37 composite outside temperature 37 connection diagrams 106 connection terminals 105 contact H1 90 control with a 2 stage burner 53 control with a single stage burner 52 controller insert 107 critical locking signals 91 D d h w temperature control 77 d h w button 101 d h w charging 72 d h w circuit type 0 19 d h...

Страница 110: ...ice functions and general settings 84 function block setpoint of return temperature limitation 57 function blocks 15 G gain factor of room influence 43 gain factor room temperature influence 43 gain of locking signal 91 generation of setpoint 47 H handling 100 handling faults 26 27 H contacts 88 heat demand 80 heat demand signal 99 heat exchanger 78 heat storage capacity 37 heating circuit operati...

Страница 111: ...urve 46 parallel operation 70 periodic pump run 90 periodicity of legionella function 81 plant type and operating mode 24 plant types 15 16 precontrol with boiler 18 precontrol with district heat 19 precontrol with mixing valve 18 primary return temperature 27 progression of outside temperature 37 protection against boiler overtemperatures 55 protection against discharging 75 protective boiler sta...

Страница 112: ...nk with mixing valve 19 stored heat 37 suitable actuators 12 suitable room units 12 suitable sensors 11 summary of plant types and plant combinations 21 summertime 90 summertime 33 suppression of hydraulic creep 61 switching differential of the d h w temperature 73 switching program 2 33 switching program 3 83 T technical data 108 temperature differential 60 time switch ON OFF 80 TV1 TV2 45 85 typ...

Страница 113: ... 63 37 Bus power supply 179 84 C Circulating pump operation during the legionella function 150 81 Clock mode 178 84 Controller s software version 195 84 D Date 40 33 Date of first day of holiday 12 30 Date of last day of holiday 13 30 DC 0 10 V heat demand output UX 181 84 Derivative action time control Tv 137 78 Device number 169 84 D h w charging 125 72 D h w charging temperature boost 127 72 D ...

Страница 114: ...imum limitation of return temperature 114 59 L Locking of settings 198 95 M Manually ON OFF 142 79 Maximum d h w charging time 129 72 Maximum early shutdown 68 37 Maximum heating up time 67 37 Maximum limitation of the boiler temperature 92 51 Maximum limitation of flow temperature 81 48 Maximum limitation of return temperature d h w 117 62 Maximum limitation of return temperature differential 115...

Страница 115: ...urve 166 84 Room temperature source 65 37 S Segment number 170 84 Selection time switch 146 79 Sensor test 163 84 Setpoint of holiday mode frost protection 3 30 Setpoint of the legionella function 130 72 Setpoint of NORMAL heating 1 30 Setpoint of NORMAL d h w temperature 26 32 Setpoint of REDUCED d h w temperature 28 32 Setpoint of REDUCED heating 2 30 Setpoint of return temperature limitation Co...

Страница 116: ...habetical list of operating lines 23 10 2002 Type of optimization 66 37 W Waiting time for second burner stage 98 51 Weekday 39 33 Weekday for the heating program 4 30 Weekday for switching program 2 31 33 Weekday for switching program 3 151 83 Winter summertime changeover 176 84 Y Year 41 33 ...

Страница 117: ...NORMAL and REDUCED setpoints 7 1 Operating line 32 Default value corrected 9 New chapter 10 4 4 Formula for room model temperature corrected 10 4 7 Formula for forward shift corrected 12 4 4 4 Sections 4 and 5 added 17 D h w setpoint is the NORMAL setpoint 17 1 2 d h w setpoints NORMAL and REDUCED 18 3 2 Item 2 signal replaced by locking signal 19 3 Legend to second table Operating line 28 added 1...

Страница 118: ...mentation RVL471 CE1P2524E HVAC Products 23 10 2002 Siemens Building Technologies Ltd HVAC Products Gubelstrasse 22 CH 6301 Zug Tel 41 41 724 24 24 Fax 41 41 724 35 22 www landisstaefa com 1997 Siemens Building Technologies Ltd Subject to alteration ...

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