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Honeywell DHC, Service Manual

The Honeywell DHC Service Manual is a comprehensive guide to operating and maintaining your Honeywell DHC device. This invaluable manual provides step-by-step instructions to optimize its performance and troubleshoot any issues. Download your free copy from manualshive.com and make the most of your Honeywell DHC experience.

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SDC / DHC 

Hydraulic Components 

 EN2H-0221GE51 R0812 

239 

This function works as described under "Safety temperature 
limiter check", with the following extension: 

As soon as a safety temperature limiter function is detected within 
the BUS system, all consumers (heating circuits) are disabled. 

 

Configuration of cascade control occurs in the central device with 
the bus address 10. If that controller becomes unavailable due to 
some defect, the remaining stages continue operating in an 
emergency mode. In this mode all heat generators adjust to the 
same boiler setpoint temperature (parallel operation). As soon as 
the cascade manager comes back into operation, cascade control 
is reactivated automatically. 

 

To enable the cascade function to process fast switching events, 
the cascade data are transferred with a higher priority. 
Consequently, the data transmission from any device to the 
master device, and of the request values from the master to the 
slave devices, takes no longer than approx. 3 seconds. 

 

7.3.13  Commissioning, maintenance and troubleshooting help 

7.3.13.1  Automatic set function 

The central devices are equipped with a function which ignores 
unused sensors and control functions. Fault messages from non-
connected sensors are not displayed. 

The AUTO SET function is only active at power up. There are two 
possibilities for calling up the AUTO SET function. 

 

If the commissioning date has not yet been stored and the 
corresponding system parameters for activating this function are 
set to ON, connected or disconnected sensors are registered 
automatically whenever the control device is switched on. Fault 
messages from sensors (short-circuit interruption) are suppressed 
in this period. After the commissioning date has been saved, a 
change to the sensor configuration is only still possible after the 
manual SET function. The AUTO SET function can be enabled at 
any time again for a day (day change) using the system 
parameter. 

 

Safety temperature 

limiter 

Emergency mode 

Data transmission 

Function 

Automatic call-up 

Summary of Contents for DHC

Page 1: ...EN2H 0221GE51 R0812 Smile SDC heating and district heating controller SERVICE MANUAL ...

Page 2: ...EN2H 0221GE51 R0812 ...

Page 3: ... 14 2 5 Maintenance and cleaning 14 2 6 Safety precautions for EMC compliant installation 15 3 Overview 20 4 Abbreviations 21 5 Operation 22 5 1 Display and operating elements 22 5 1 1 Display basic display 23 5 1 2 Operating elements 24 5 1 2 1 Input button press turn 24 5 1 2 2 Daytime room temperature button 24 5 1 2 3 Night time room temperature button 25 5 1 2 4 Daytime hot water temperature ...

Page 4: ... 2 Time program 72 5 2 3 3 Operating mode 74 5 2 3 4 Parameter reset 76 5 2 3 5 Complete reset 77 5 2 4 DHW menu 77 5 2 4 1 Night time hot water temperature 78 5 2 4 2 Legionella protection day 78 5 2 5 Direct Heating Circuit Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu 78 5 2 5 1 Reduced operation 79 5 2 5 2 Heating system 80 5 3 Error messages 80 5 4 Parameter settings 81 5 4 1 Hydraulic...

Page 5: ...nt of the hydraulic parameters variable inputs and outputs 114 6 1 1 Connection and settings table 116 6 2 Switching time program enabling 117 6 3 Suppressing the cycle temperature on time program level 118 6 4 Enabling Separate Control Mode 118 6 5 Switching from SDC to DHC 119 6 6 Selection of hydraulic parameter presettings 119 6 7 The variable inputs and outputs of device series SDC DHC 43 119...

Page 6: ...0 Modulation of sample time Ta 137 7 1 11 Modulation of integral action time Tn 138 7 1 12 Modulation of runtime 138 7 1 13 Modulation of start time 138 7 1 14 Modulation of start power 139 7 1 15 OpenTherm 140 7 1 16 Use of boiler sensor 2 141 7 1 17 External heat generator cut off 141 7 1 18 Heat generator forced discharge 141 7 1 19 Exhaust gas temperature monitoring 142 7 1 20 Burner counter m...

Page 7: ...59 7 2 17 1 Bypass pump RBP 161 7 2 17 2 Return maintenance through controlled feed water addition161 7 2 17 3 Indirect return increase 162 7 3 Heating circuit 162 7 3 1 General heating circuit functions 162 7 3 1 1 Heating curve 162 7 3 1 2 Heating curve setting heating curve 163 7 3 1 3 Reduced operation 165 7 3 1 4 Heating system 165 7 3 1 5 Heating circuit temperature limit 165 7 3 1 6 Heating...

Page 8: ...95 7 3 6 Solar Solid fuel Buffer 198 7 3 6 1 Solar function 198 7 3 6 2 Buffer tank function 201 7 3 6 3 Solid fuel function 214 7 3 7 Tank loading switch over 215 7 3 8 Hydraulic buffer relief HBR 217 7 3 9 Easy enabling and disabling of a heating pump 218 7 3 10 Other system components 219 7 3 10 1 Global fault message input 219 7 3 10 2 Global fault message output 219 7 3 10 3 Timer 219 7 3 10 ...

Page 9: ...nction 239 7 3 13 2 Emission measurement not for DHC 43 240 7 3 13 3 Relay function test 241 7 4 Error messages 245 7 4 1 Basic display fault stack fault messages 250 7 4 1 1 Sensor calibration 251 7 4 1 2 Full controller reset 251 7 4 1 3 Controller time correction 251 8 Technical data 252 8 1 General 252 8 1 1 Installation recommendations 253 8 2 Sensor resistance values 253 8 2 1 NTC 20 253 8 2...

Page 10: ...Contents SDC DHC 10 EN2H 0221GE51 R0812 ...

Page 11: ... pumps do not run dry and the heating boiler is not damaged The control equipment must be installed in accordance with the installation instructions All electrical connections voltage supply burner mixer motor pumps sensor wiring etc must be carried out by the technician in accordance with the applicable VDE regulations and correspond with the circuit diagrams If floor heating is connected a limit...

Page 12: ...les carrying 230 V power supply burner pumps actuator 0 6 mm2 for bus cables recommended type J Y St Y 2 x 0 6 0 5 mm2 for sensors selectors and analog signal cables 2 2 4 Maximum cable lengths Sensor selector and analog inputs We recommend using cables no longer than 200 m Longer connection lines could be used but increase the risk of interference Relay outputs Unlimited cable length Bus connecti...

Page 13: ...nd in the hot water tank In the manual mode emission measurement operating mode the hot water is heated up to the highest possible boiler temperature as the burner and all pumps are switched on and the mixer is opened fully There is an acute danger of scalding at all connected hot water draw off points Add sufficient cold water or switch off the hot water loading pump at the switch of the pump if ...

Page 14: ...pplied to terminals 21 22 2 6 12 and 18 headers X3 and X4 can also carry mains voltage If the heating circuit and hot water loading pumps do not have an On Off switch but manual switch on and switch off capability is still desired the appropriate switches must be installed by the customer All accessory parts sensors selectors etc are to be connected to the respective circuit diagram 2 5 Maintenanc...

Page 15: ...rate from each other A minimum of 2 cm space must be present between the lines It is permissible to cross lines a Mains 230 V AC x 15 cm b Data bus line 12 V AC y 2 cm For control devices with their own mains connection separate installation of mains and sensor bus lines must absolutely be ensured If cable ducts are used they are to be provided with cut off bridges ...

Page 16: ...ith electromagnetic emissions e g relays motors transformers dimmers microwave ovens and televisions audio speakers computers cordless telephones etc is to be ensured x 40 cm A minimum spacing of 40 cm is to be ensured between wall devices and central devices Multiple central devices in the data bus system can be mounted directly next to one another ...

Page 17: ...fluorescent lamps nor any machines which are potential sources of interference may be connected connectable a Safety fuse 16 A b Boiler room emergency switch c Connect boiler room lighting and electrical outlets to separate circuits only d Wall devices e Heat generator Shielded cables must be used for the data bus lines For a recommended layout see 8 Technical data pg 252 ...

Page 18: ...cable shielding must occur on one side at the protective conductor connection e g at the cladding plate of the heat generator protective conductor terminal etc Multiple earth connections of a single cable are not permissible buzzing loop a No earth connection here b Central device ...

Page 19: ...onnection must be made on one side of the star a Shielding b Two lead data bus line c Distributor terminal d Branch box The outside sensor may not be installed near transmitters or receivers e g on garage walls near garage door opener receivers amateur radio antennas radio alarm systems or directly next to large transmission equipment etc ...

Page 20: ...pe Number of output relays Burner stage 2 or District heating valve CLOSED Burner stage 1 Direct heating circuit Variable output 3 Mixed heating circuit 1 Mixed heating circuit 2 Tank loading pump Variable output 2 Variable output 1 SDC 3 10 3 x x x SDC 3 40 3 x SDC 7 21 1 7 x x x x x SDC 9 21 2 7 two variable relays x x x x x x x SDC 12 31 3 10 two variable relays x x x x x x x x 1 DHC 43 1 2 DHC...

Page 21: ...sipation EHR Electric heating rod SLP Solar loading pump SFB Solid fuel boiler sensor STL Stratified tank loading pump SFR Solid fuel buffer sensor VO Variable output general FC Fixed value control VO1 Variable output 1 SFP Solid fuel pump VO2 Variable output 2 PI Pulse input VI Variable input general BP Boiler circuit pump VI1 Variable input 1 CC Constant control VI2 Variable input 2 CRS Collecto...

Page 22: ...ng controllers 2 Operating modes button basic display 3 Switching time programs Holiday programs button 4 System information button 5 Display 6 Cover clip for service socket 7 Daytime room temperature button 8 Night time room temperature button 9 Daytime hot water temperature button 10 Input button press turn 11 Operating mode symbols heating programs ...

Page 23: ...h automatic fault diagnosis is carried out The respective device type and the software version number then appear briefly The basic display that then appears shows the day of the week the date the time and the heat generator temperature in automatic mode Different values appear in the basic display depending on the set operating mode AUTOMATIC PARTY etc Thus for example in the ABSENT operating mod...

Page 24: ...ature room setpoint in automatic mode during the heating cycles and in the PARTY and HEATING operating modes In operating mode 1 the set value for all heating circuits is the same In operating mode 2 the set value applies for the respective heating circuit To set the operating mode see 5 2 3 3 Operating mode pg 74 Press button Set flashing room temperature specification to the desired value by tur...

Page 25: ...input button Alternative Automatic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 16 C 5 30 C 5 1 2 4 Daytime hot water temperature button Sets the daytime hot water temperature during the hot water operational readiness times in automatic mode and in the PARTY and HEATING operating modes This set value also applies for exclusively hot water oper...

Page 26: ...et in minutes With a reload time of 0 minutes loading is started once and the hot water tank is loaded to the daytime setpoint The time for this superimposed hot water circuit loading can be set between 0 and 240 minutes The current week program is superimposed here 5 1 2 5 Operating mode button basic display Sets the operating mode and returns to the basic display from every operating level Setti...

Page 27: ...he operating modes Symbol Operating mode Display Setting ABSENT P1 P2 P3 return date PARTY P1 P2 P3 party end time AUTOMATIC P1 P2 P3 SUMMER P1 P2 P3 HEATING RED HEATING STANDBY P2 and P3 only after enabling see System Parameters menu parameter 2 P1 to P3 ...

Page 28: ...tic acceptance of the value after the set information time see 5 1 2 7 System information button pg 35 Press the button for approx 3 s to return to the basic display from any operating level Holiday mode is set via the Switching time programs Holiday programs button see 5 1 2 6 Switching time programs Holiday programs button pg 33 5 1 2 5 1 Absence mode short term program With the ABSENT operating...

Page 29: ...rogram is called up again the last set value is saved and suggested as the initial value An active absence program appears in the basic display with information on the return time 5 1 2 5 2 Party mode short term program Party mode causes one time intermediate heating of all heating circuits up to a specified point in time and bridges an upcoming or already active absence cycle totally or partially...

Page 30: ...is called up again the last set value is saved and suggested as the initial value An active party program appears in the basic display with information on the party end time 5 1 2 5 3 Automatic mode In automatic operation max three time programs with different heating operation times are available They are called up during start up as factory set and unlosable default programs P1 P2 or P3 and can ...

Page 31: ...ogram The symbols are only displayed with the time program P1 to P3 active 5 1 2 5 4 Manual summer operation excluding heating operation With manual summer operation only the hot water circuit remains operation and controls the heat generator temperature based on the specified hot water temperature and the specified hot water switching time program Heating operation is stopped and protection from ...

Page 32: ...er temperature The HEATING operating mode remains active until another operating mode is activated Activated continuous heating operation appears in the basic display with the information HEATING 5 1 2 5 6 Continuous lowering operation The RED HEATING operating mode causes continuously reduced heating operation based on the specified lowered room temperature On the heating circuit levels the reduc...

Page 33: ...h full building protection The heat generator and hot water production remain in operation in case of external demand or demand by other heating circuits on the bus network The heating circuit pumps are switched on briefly every day pump anti blocking protection The standby mode remains active until another operating mode is activated Activated continuous standby mode appears in the basic display ...

Page 34: ...ars in the display Turn input button to the left HOLIDAY appears in the display Press input button HOLIDAY 01 appears in the display Press input button The year flashes in the display Set year with the input button Press input button The day on which the holiday is to begin flashes in the display Set the day the holiday will begin with the input button Press input button TIL appears in the display...

Page 35: ...ent date current date 250 days An active holiday program appears in the basic display with information on the return date 5 1 2 7 System information button Calls up system information such as temperatures and counter data The information on the outside temperature appears first after the button is pressed Turning the input button causes the system temperatures and the counter and consumption state...

Page 36: ...Operation SDC DHC 36 EN2H 0221GE51 R0812 Operating overview ...

Page 37: ... value Outside temperature 1 Min max value 0 00 to 24 00 hours Outside sensor connected and no fault message Outside temperature 2 Determined value Current value Variable input configured as OS2 Connection OS2 to variable input VI1 VI2 or VI3 Outside temperature 2 Min max value 0 00 to 24 00 hours OS2 connected no fault message EM SET energy management setpoint EM SET Highest hot water setpoint an...

Page 38: ...ble input VI1 Water heater temperature 1 Setpoint Actual value If hot water circuit is present Code 1 only appears if SF2 is present Water heater temperature 2 Setpoint Actual value Variable input configured as SF2 Connection to variable input VI1 VI2 or VI3 Water heater temperature controller Load condition ON OFF Thermostat mode Thermostat instead of sensor SF1 only Demand via switching contact ...

Page 39: ...xed heating circuit 2 room temperature Setpoint Actual value Mixed heating circuit 2 specified Setpoint inquiry without room temperature sensing Current room setpoint of mixed heating circuit 2 Direct heating circuit thermostat function DC THERMOSTAT Thermostat function specified OFF temperature limit exceeded Mixed heating circuit 1 thermostat function MC1 THERMOSTAT Thermostat function specified...

Page 40: ...nk loading pump Connection of KRLF to variable input VI1 VI2 or VI3 Solar tank switch over temperature Actual value Solar loading valve activated 5 1 2 7 2 Operating states An operating state inquiry occurs after the information menu is called up by turning the input button anti clockwise The following displays appear only under the specified conditions and may not be available depends on device v...

Page 41: ...ating status District heating valve opens closes or does not move With district heating controllers Heat generator operating status st 1 Heat generator specified Information on the switching state of the multi stage heat generator Heat generator operating status st 2 Multi stage heat generator specified Information on the switching state of the second stage of the heat generator Operating status o...

Page 42: ...HKP constant KP timer CLOCK Function and status of variable output 2 Outputs specified based on function Solar SOP circulation CIR electric heating rod ELH feeder CHP boiler circuit KKP1 KKP2 fault message SMA return RLP buffer PLP solid fuel FSP heating circuit HKP constant KP timer CLOCK District heating valve volume flow Heat generator specified With district heating controllers District heatin...

Page 43: ...st temperature sensor connection to variable input VI1 VI2 or VI3 Operating status of ext switching modem VI configured as switching modem Control modes based on the switching state of the modem AUTO automatic STBY standby HEAT continuous heating RED continuously reduced Solar heating capacity VO1 2 configured as solar tank loading pump Solar loading pump at variable output Solar heat balance VO1 ...

Page 44: ...he bottom left hand side The current heat generator temperature appears statically on the right hand side in the basic display The set switching differential corresponds to the value of automatic control and is symmetrical to the set value Controller malfunctions emergency operation errors The maximum heat generator temperature limit is paramount to the heat generator switching differential and st...

Page 45: ...d down With two stage heat generators both stages are in operation measurement at nominal output The heat generator is adjusted to the maximum heat generator temperature All heating circuits and the hot water production adjust their setpoint to the respective maximum temperature ATTENTION There is a danger of scalding by hot water as the hot water temperature can exceed the set setpoint temperatur...

Page 46: ...r by turning the input button Press the input button The second number flashes Enter all remaining code numbers as described in Steps 2 and 3 After entering the last code number the controller is enabled for the respective area technician or OEM Press and hold the rotary button longer than 3 seconds You reach the menu selection level and can enter modify parameters Pressing the button jumps back t...

Page 47: ...anged Press and hold input button for 3 s Turn the input button to select the desired heating circuit HC MC 1 or MC 2 and confirm it by pressing the input button The design temperature system appears at the bottom right hand side of the display Press input button The slope of the heating curve appears at the bottom left hand side of the display Set the flashing heating curve value by turning the i...

Page 48: ... C a Troom C 5 2 Menu selection level The control device contains a menu selection level that is structured differently depending on the respective device version Press and hold input button for approx 3 seconds The menu selection always begins with the TIME DATE menu Turn input button to select additional menus Press input button to confirm the selected menu Factory setting Access ...

Page 49: ... sensor 4 Switch over Mixed heating circuit 2 output Summer Heat limit Legionella protection temperature Room factor Room factor Maximum temperature limit Secondary flow boost Switch off differential Buffer switching differential Switch over capacity of stage sequence Mixed heating circuit 2 bus authorisation Mixer motor 1 test Fault message 4 Mixed heating circuit 1 flow sensor 3 Day Month Mixed ...

Page 50: ...ault message 13 Mixed heating circuit 2 room sensor 12 Anti blocking function Circulation pump switching time program Minimum temperature limit Minimum temperature limit Calibration of thermal output Density of medium Fault message 12 Mixed heating circuit 1 room sensor 11 Indirect return increase via mixed heating circuit Automatic exit time Hot water loading pump extended running time Constant t...

Page 51: ...tside temperature disable 24 Room control Tn Room control Tn Modulation of start power 23 Locking code for operating level Room control C factor Room control C factor Modulation of start time 22 Actuator end position function Modulation of runtime 21 Adjustment of the real time clock RTC Actuator runtime Modulation of adjustment time Tn Reset fault messages 20 I part Tn Fault message 20 Parameter ...

Page 52: ...city limit 33 Selection SDC DHC 32 31 Full load control 30 OEM maximum limit Parameter Date Hydraulics System parameter Hot water Direct heating circuit Mixed heating circuit 1 2 Heat generator District heating Return increase Solar Solid fuel Buffer Total flow control Cascading Data bus Relay test Fault messages 1 2 Sensor calibration Programming Configuration Configuration heating circuits contr...

Page 53: ...at time Heating technician 41 Switch on optimisation Switch on optimisation User 40 Offset valve position of hot water circuit pre control Resetting of stage 2 burner start up and operating hour counters Parameter Date Hydraulics System parameter Hot water Direct heating circuit Mixed heating circuit 1 2 Heat generator District heating Return increase Solar Solid fuel Buffer Total flow control Cas...

Page 54: ... weekday Mo to Su is determined from the calendar date and does not need to be set Corrections for rare fault cases See 5 2 Menu selection level pg 48 Turn input button and select the Time Date menu Turn input button and select the desired calendar value time year day month change Press input button and change the corresponding value by turning the input button Press input button to confirm the se...

Page 55: ...e heating cycles each with a switch on and switch off time are available for each day of the week for programming switching times Each heating cycle can also be combined with a freely selectable temperature specification The default programs are not lost when overwritten by individually created programs Individualised programs however are deleted when default programs are reloaded and must be recr...

Page 56: ...ection of the program If the switching time programs P2 and P3 have been enabled see System Parameter menu program parameter P1 to P3 the program selection appears If switching time programs P2 and P3 are disabled program selection is automatically skipped see System Parameters menu program parameter P1 5 2 2 3 Selection of day of the week and cycle Once the program is selected the first cycle of ...

Page 57: ...h on time is changed the corresponding time bar display is adjusted to the left hand side If the switch on time is made equal to the switch off time the corresponding cycle is deleted A subsequent cycle is automatically shifted to the position of the deleted cycle upon acceptance With subsequent insertion of a cycle that has been bumped up the corresponding day of the week must be reprogrammed A f...

Page 58: ... flashing switch off time is accepted by pressing the input button 5 2 2 4 3 Cycle temperature Once the switch off time is accepted the associated cycle temperature appears flashing and can be changed immediately with the input button With heating circuits the displayed cycle temperature is always based on the desired room temperature with the hot water circuit it is based on the desired normal ho...

Page 59: ...ccessing the menu selection level the Timeprograms menu always appears first Enabling of programs P2 and P3 in the System Parameters menu see 5 2 Menu selection level pg 48 HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit Hcy Heating cycle ...

Page 60: ...and hot water Uniform continuous heating and hot water operation on all days of the week Default program P1 Heating circuit Day Heating operation from to Heat generator heating circuit Mo to Su 6 00 22 00 Hot water circuit Mo to Su 5 00 22 00 Mixed heating circuit 1 2 Mo to Su 6 00 22 00 ...

Page 61: ...cessing the menu selection level the Timeprograms menu always appears first Enabling of programs P2 and P3 in the System Parameters menu see 5 2 Menu selection level pg 48 HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit Hcy Heating cycle ...

Page 62: ...circuit Mo to Th 6 00 8 00 16 00 22 00 Fr 6 00 8 00 13 00 22 00 Sa to Su 6 00 22 00 Hot water circuit Mo to Th 5 00 8 00 15 30 22 00 Fr 5 00 8 00 12 30 22 00 Sa to Su 6 00 23 00 Mixed heating circuit 1 2 Mo to Th 6 00 8 00 16 00 22 00 Fr 6 00 8 00 13 00 22 00 Sa to Su 7 00 23 00 Default program P3 Heating circuit Day Heating operation from to Heat generator heat ing circuit Mo to Fr 7 00 18 00 Sa ...

Page 63: ... and the program index Press input button to confirm the source day The source day appears flashing Turn input button to select the following setting values and confirm by pressing the input button The following target days Mo to Su individually All days of the week 1 to 7 as a week block All weekdays 1 to 5 as a weekday block The weekend days 6 to 7 as a weekend block Acceptance is confirmed by a...

Page 64: ...enabled program selection is skipped Press input button to confirm the source circuit Based on the same chart the desired target circuit and if enabled the desired program can be selected and accepted Acceptance is confirmed by acknowledging COPY OK The copy function is then called up again to copy additional circuits if necessary Heating circuits cannot be copied to hot water circuits or the re v...

Page 65: ...the week week programming All cycles of the source day are copied Individual heating cycles cannot be copied HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit 1 Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the System Parameter menu ...

Page 66: ...Operation SDC DHC 66 EN2H 0221GE51 R0812 ...

Page 67: ...ycle temperatures If a heating circuit is selected as the source circuit the hot water circuit can no longer be called up as the target circuit The hot water circuit as the source circuit is also the target circuit In this case only programs of the hot water circuit are copied among one another if they were enabled in the System Parameter menu NOTE ...

Page 68: ... the heating circuit selection after accessing the Timeprograms menu After confirming by pressing the input button the circuit dedicated to reloading appears flashing HC MC 1 MC 2 ALL If the automatic programs P1 P2 and P3 see System Parameter menu program parameter P1 to P3 were enabled the desired switching time program P1 P2 or P3 of the heating circuit affected by the reload can be selected If...

Page 69: ...d the hot water circuit are overwritten with their default switching times with regard to the selected program When overwriting occurs individually created switching time programs are permanently lost and must be recreated from scratch Pressing the button causes an immediate return to the basic display ...

Page 70: ...DC DHC 70 EN2H 0221GE51 R0812 Reloading default programs Switching time programs P2 and P3 disabled HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit ...

Page 71: ...led HC Direct heating circuit MC 1 Mixed heating circuit 1 MC 2 Mixed heating circuit 2 DHW Hot water heating circuit 5 2 3 System Parameters menu The system parameters refer to general limiting parameters and specification values within the heating system See 5 2 Menu selection level pg 48 Access Returning ...

Page 72: ...g the input button additional communication takes place in the respective language DE German GB English FR French IT Italian NL Dutch ES Spanish PT Portuguese HU Hungarian CZ Czech PL Polish RO Romanian RU Russian TR Turkish S Swedish N Norwegian DK Danish German 5 2 3 2 Time program This parameter specifies enabling of the switching time programs for program selection and for individualised switc...

Page 73: ...mode selection In the AUTOMATIC and SUMMER operating modes switching time program P1 P2 or P3 can be selected Switching time programming With switching time pro gramming the three switching time programs P1 to P3 can be selected for each heating circuit 5 2 3 2 1 Control mode selection In the AUTOMATIC and SUMMER control modes switching time program P1 P2 or P3 can be selected 5 2 3 2 2 Switching ...

Page 74: ...d an individualised set ting 1 5 2 3 3 1 Individualised daytime room temperature for each heating circuit Press button Select desired heating circuit HC MC 1 or MC 2 by turning the input button Confirm selected circuit by pressing the input button Set flashing room temperature specification to the desired value by turning the input button Confirm set value by pressing the button Alternative Automa...

Page 75: ...circuit Each heating circuit can be assigned an individualised operating mode Press button Select desired heating circuit HC MC 1 or MC 2 by turning the input button Confirm selected circuit by pressing the input button Select flashing operating mode by turning the input button Confirm set operating mode by pressing the button or the input button With short term operating modes ABSENT PARTY set de...

Page 76: ... deactivation phases standby mode manual summer operation summer deactivation lasting longer than 24 hours all pumps are switched on for approx 20 s and the mixers are temporarily opened during this time to protect against blocking by corrosion In connection with a second outside sensor the current averaged outside temperature is accepted for summer deactivation if the average value of both sensor...

Page 77: ...ears briefly Verification is then started with a call up of the first parameter in the respective menu once again After the parameter values are reset a return to the first parameter in the System Parameter menu occurs 5 2 3 5 Complete reset To reset all settings a complete reset of the device can be carried out A complete reset is initiated when the and keys are pressed simultaneously until the c...

Page 78: ...t in the following parameter ALL The legionella protection function is activated daily at the legionella protection time set in the next parameter If a hot water thermostat see 05 parameter transducer for hot water circuit is used to detect the hot water temperature these parameters are skipped 5 2 5 Direct Heating Circuit Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu These menus contain al...

Page 79: ... off completely with outside temperatures above the set frost protection limit The maximum heat generator temperature is not functional The heating circuit pump is switched off after a delay to avoid safety deactivation by reheating the heat generator pump follow up If the outside temperature is or becomes lower than the specified outside temperature frost protection limit the controller switches ...

Page 80: ...rd heating RAD radiator systems UFH floor heating with mixed heating circuits UFH RAD CONV 5 3 Error messages ATTENTION Inform the heating technician whenever any fault messages are output The control device contains substantial error notification logic The error messages appear in continuous alteration with the basic display Multiple errors that occur at the same time appear one after another in ...

Page 81: ...u refer to the general system hydraulics and the functions and configuration of the programmable inputs and outputs for the respective system components Representative of many individual settings the applications are only defined by the 1st parameter of this setting table Example The controller is to cover system No 0202 Provided that the controller features enough relays parameter 01 must be set ...

Page 82: ...nce 30 Mixed heating circuit as continuous hot water pre regulator district heating 39 Hot water pre regulator district heating 04 Mixed heating circuit 2 output For setting values see parameter 03 3 05 Direct heating circuit pump output OFF No function 2 2 Direct heating circuit pump 4 Circulating pump 5 Electric heating element 6 Constant regulation 10 Feeder pump 11 Boiler circuit pump 1 12 Boi...

Page 83: ...rcuit 9 Bypass pump 10 Feeder pump 11 Boiler circuit pump 1 12 Boiler circuit pump 2 13 Group error message 15 Solar charging pump 16 Buffer charging pump 17 Solid fuel charging pump 18 Stratified tank charging pump DHC 19 Solar charging switchover 25 Cooling switchover 26 Primary pump 27 Hydraulic buffer relief 47 Electrical water heater 07 Variable output 2 For setting values see parameter 06 OF...

Page 84: ...heating circuit 1 8 Return maximum limit of mixed heating circuit 2 9 Return temperature sensor 10 External heat generator cutoff 11 External switching modem 12 External information 13 Total flow sensor 14 Collector return sensor 15 District hot water strat ified tank charge sensor 16 Exhaust gas sensor 18 Solids buffer sensor 19 Buffer sensor 1 29 Hygrostatic switch off 30 Room sensor NTC 20 of d...

Page 85: ...or limit sensor of district heating VFB however OFF 11 Indirect return lift ing via mixed heating circuit OFF ON OFF 5 4 2 System parameters menu SYSTEM The parameters in this menu refer to general limit parameters and specification values in the heating system used Para meter Designation Setting range Setting values Factory setting Setting Language selec tion Language selection DE German DE GB En...

Page 86: ...ts Summer Summer switch off OFF setting value of parameter 05 to 30 C 20 05 System frost protection OFF 20 C to Setting value of summer parameter 3 06 Request contact module for variable input 1 1 Direct heating circuit 1 2 Mixed heating circuit 1 3 Mixed heating circuit 2 4 Hot water circuit ALL All controllers 07 Request contact module for variable input 2 For setting values see parameter 06 1 0...

Page 87: ... blocking protection active ON OFF Anti blocking protection not active 13 Logical fault messages OFF ON OFF 14 Automatic set function OFF ON OFF 15 Locking code for heating tech nician OFF 0001 to 9999 1234 16 Type code Controller type corresponding to type code table Type 18 Cycle temperature enable OFF Cycle temperature disabled ON ON Cycle temperatures enabled 19 Frost protection mode OFF Conti...

Page 88: ...ng code for operating level OFF 0000 9999 OFF 25 Cooling switch on temperature 2 10 K 6 28 Error memory 2 OFF ON OFF 29 Characteristic curve for emergency operation without outside sensor 50 to 30 C 0 Selection of SDC DHC Selection of SDC DHC SDC DHC SDC Para meter re set Parameter reset SET by pressing the input button OEM Other controllers also allow other language variants ...

Page 89: ...OFF No legionella protection OFF Mon to Sun Legionella protection on specified day of week ALL Legionella protection every day 03 Legionella protection time 00 00 23 00 hours 02 00 04 Legionella protection temperature 10 C to setting value of parameter 06 65 05 Transducer for hot water circuit 1 Hot water circuit temperature sensor 1 2 Hot water circuit temperature controller thermostat 06 Maximum...

Page 90: ... 8 Conditional parallel operation for mixed heating circuit DHC only 08 Tank discharge protection OFF No discharge protection ON Switch ing differ ential 5 20 K 5 K 09 Temperature in crease of heat generator with hot water circuit charging 0 50 K Difference between hot water circuit charging temperature and hot water circuit setpoint temperature 15 10 Switching differential of hot water circuit 2 ...

Page 91: ...g circuit 1 5 P2 mixed heating circuit 1 6 P3 mixed heating circuit 1 7 P1 mixed heating circuit 2 8 P2 mixed heating circuit 2 9 P3 mixed heating circuit 2 10 P1 hot water circuit 11 P2 hot water circuit 12 P3 hot water circuit 13 Economy interval pause of circu lating pump 0 setting value of parameter 14 Switch on interval while the circulating pump is running 5 14 Economy interval cycle period ...

Page 92: ...r heater 0 600 min 60 min 29 Offset setpoint for Electrical water heater 1 99 K 5 K 5 4 4 Direct heating circuit menu UNMIXED CIRC This menu contains all parameters required to program the un mixed heating circuits except the switching time programs Para meter Designation Setting range Setting values Factory setting Setting Heat ing curve Slope OFF 0 02 to 3 50 1 5 Re duced Reduced operation ECO S...

Page 93: ...f room temperature room sensor active operation disabled 3 Display of room temperature room sensor off operation active 04 Room factor OFF OFF 10 500 Influence active RC Room controller active 07 Heating limit OFF 0 5 to 40 K OFF 08 Room frost protection limit 5 30 C 10 09 Room thermostat function OFF 0 5 to 5 K OFF 10 Assignment of outside sensor 0 Regulation to average value outside sensor 1 out...

Page 94: ... circuit 0 15 Extended pump over run 0 60 min 5 16 Screed function OFF OFF 1 Functional heating 2 Screed drying heating 23 Room control C factor SDW 30 only 1 100 8 24 Room control Tn SDW 30 only 5 240 min 35 25 Holiday operating mode STBY Standby STBY RED Lowering operation 26 Room setpoint ramp OFF 0 5 to 60 K h OFF 41 Switch on optimisation OFF OFF 1 Adaption off 2 Adaption on 3 Adaption restar...

Page 95: ...eating circuit 1 2 MIX VALVE 1 MIX VALVE 2 menus These menus contain all parameters required to program the mixed heating circuit except the switching time programs Para meter Designation Setting range Setting values Factory setting Setting Heat ing curve Slope OFF 0 02 to 3 50 1 Re duced Reduced operation ECO Switch off operation ECO RED Lowering operation Heat ing system Heating system UFH Floor...

Page 96: ...ion active 2 Display of room temperature room sensor active operation disabled 3 Display of room temperature room sensor off operation active 04 Room factor OFF OFF 10 500 Influence active RC Room controller active 07 Heating limit OFF 0 5 to 40 K OFF 08 Room frost protection limit 5 30 C 10 09 Room thermostat function OFF 0 5 to 5 K OFF 10 Assignment of outside sensor 0 Regulation to average valu...

Page 97: ... Heat generator menu OEM maximum limit 75 14 Temperature increase of heating circuit 5 20 K Mixed heating circuit 4 15 Follow up time of pump 0 60 min 5 16 Screed function OFF OFF 1 Functional heating 2 Screed drying heating 17 Return maximum temperature limit 10 90 C 90 18 P part XP 1 50 K 2 19 Sampling time Ts 1 600 s 20 20 I part Tn 1 600 s 270 21 Actuator runtime 10 600 s 120 22 Actuator end p...

Page 98: ...d heating circuit OFF 5 to 24 OFF 39 Spread of hot water circuit pre regulator 2 20 K 5 40 Offset valve position of hot water circuit pre regulator 0 100 0 41 Switch on op timisation OFF OFF 1 Adaptation off 2 Adaptation on 3 Adaptation restart 42 Minimum pre heat time 0 setting value of parameter 43 0 5 43 Maximum pre heat time Setting value of parameter 42 to 30 h 5 44 Min jump back temperature ...

Page 99: ...ing Setting 01 Design OFF Without heat generator 1 1 Oil gas one stage 2 Oil gas two stages 3 Oil gas 2 x one stage 4 Modulating burner 5 Open Therm 02 Start up protection not if parameter 01 OFF OFF No start up protection 1 1 Unlimited start up protection 2 Start up protection controlled by weather conditions 3 Start up protection disconnected 03 Minimum tem perature limit not if parameter 01 OFF...

Page 100: ...able in case of defect 07 Minimum burner runtime 0 20 min 2 08 Burner switching differential I One stage 2 30 K 6 Two stages 2 setting value of parameter 09 0 5 K 09 Burner switching differential II not if parameter 01 2 setting value of parameter 08 0 5 to 30 K 8 10 Connection delay stage II 0 60 min 0 10 s 0 11 Boiler start up relief stage II 1 Unlimited enable during start up relief 2 2 Time ou...

Page 101: ...ate configuration in the Hydraulics menu 0 60 min 2 15 Follow up time of feeder pump only with appropriate configuration in the Hydraulics menu 0 60 min 2 16 Exhaust gas temperature monitoring only with appropriate configuration in the Hydraulics menu OFF Display of exhaust gas temperature only OFF 0 60 min Heat generator lock if limit value is exceeded for set time SLT Heat generator lock if limi...

Page 102: ... Modulation of start power 0 100 70 25 Outside tempera ture lock not if parameter 01 OFF OFF 20 to 30 C OFF 26 Base load increase 0 60 K 30 27 Minimum temperature limit of heating circuits only if parameter 02 3 5 C to setting value of parameter 03 36 28 Switching differential of minimum temperature limit of heating circuits only if parameter 02 3 2 20 K 4 29 Heat generator forced discharge OFF OF...

Page 103: ... only 2 Free counter 38 Outside temperature lock inverse OFF 20 to 30 C OFF 39 Fixed delay Cascade Off 1 300min OFF RESET ST 1 Resetting of burner start counter and operating hours of stage 1 not if parameter 01 OFF SET by pressing the input button RESET ST 2 Resetting of burner start counter and operating hours of stage 2 not if parameter 01 2 or 01 OFF SET by pressing the input button OEM 5 4 7 ...

Page 104: ...strict heating valve stroke 0 50 10 04 Secondary flow boost 0 1 30 K 5 05 Adjustment time 0 60 min 3 06 Runtime of district heating valve 1 10 1800 s 120 07 Runtime of district heating valve 2 10 1800 s 30 08 Maximum return temperature setpoint 0 100 C 90 09 Application point variable district heating return temperature OFF 40 to 10 C OFF 10 Maximum return temperature setpoint with hot water circu...

Page 105: ... of heat output 1 9999 1 13 Calibration of volume flow 1 9999 1 14 Maximum heat output 1 9999 kW 9999 15 Maximum volume flow 0 01 99 99 m3 h 99 99 OEM 5 4 8 Return increase menu RETURN CONTR The parameters in this menu refer to special settings with regard to the increase in return temperature with heat generators Enabling occurs only with corresponding activation in the Hydraulics menu Para meter...

Page 106: ...ting value of parameter 01 3 K 5 03 Minimum runtime of solar charging pump 0 60 min 3 05 Buffer maximum temperature limit 20 110 C 75 06 Operating mode 1 Priority operation 2 2 Parallel operation 3 Priority operation of hot water circuit 4 Priority operation of buffer 07 Heat generator cycle inhibitor only if parameter 06 1 OFF 0 5 to 24 h OFF 08 Solar priority parallel switchover OFF 1 to 30 K OF...

Page 107: ...tion Enabling occurs only with corresponding activation in the Hydraulics menu Para meter Designation Setting range Setting values Factory setting Setting 01 Minimum temperature 20 80 C 60 02 Maximum temperature 30 100 C 90 03 Switch on differential Setting value of parameter 04 3 K to 20 K 10 04 Switch off differential 2 K to setting value of parameter 03 3 K 5 05 Heat generator cycle inhibitor O...

Page 108: ...to 80 K 0 04 Buffer switching differential 1 to 70 K 2 05 Forced discharge OFF OFF 1 In process water tank 2 In heating circuits 06 Follow up switch on differential OFF setting value of parameter 07 2 K to 50 K 10 07 Follow up switch off differential 1 K to setting value of parameter 06 2 K 5 08 Buffer start up protection OFF No start up protection ON Switching differential 5 20 K 5 K 09 Buffer di...

Page 109: ...ot water circuit 5 Charge regulation with hot water circuit switchover 6 Discharge regulation for heat generator 11 Follow up time of buffer charging pump 0 60 min 3 5 4 12 Total flow regulation menu MAIN SUPPLY The parameters in this module refer to special settings with regard to total flow regulation This selection is only available if a total flow sensor is configured on one of the variable in...

Page 110: ... setting Setting 01 Switching differential 0 5 30 K 4 02 Connection delay 0 200 min 0 03 Switch off delay 0 60 min 0 04 Switchover power of stage sequence 10 100 65 05 Stage reversal OFF 1 to 250 h OFF 06 Guidance stage 1 maximum number of stages 1 07 Peak load stage OFF 2 maximum number of stages All heat generators are numbered consecutively within the cascade The total quantity determines the m...

Page 111: ...isation 1 2 Simple access authorisation 04 Bus authorisation SDW 30 of mixed heating circuit 2 1 Expanded access authorisation 1 2 Simple access authorisation 5 4 15 Relay test menu RELAY TEST In this menu the relays contained within the central device can be selected via the input button and checked for operation Para meter Designation Setting range Setting values Factory setting Setting 01 Heat ...

Page 112: ...M Error messages that occur are displayed in this menu The fault memory can hold max 20 messages which can be displayed individually Para meter Designation Setting range Setting values Factory setting Setting 01 Error message 1 Last error message Display 02 Error message 2 Last error message but one Display 03 Error message 3 Last error message but two Display 04 Error message 4 Last error message...

Page 113: ...r message 2 Last error message but one Display 03 Error message 3 Last error message but two Display 04 Error message 4 Last error message but three Display 20 Error message 20 First error message Display 21 Reset error messages SET by pressing the input button OEM 5 4 18 Sensor calibration menu SENSOR ADJ In this menu all sensors connected to the central device can be corrected by 5 K based on th...

Page 114: ...ting circuit 2 5 5 K 0 6 Control Functions 6 1 Variable adjustment of the hydraulic parameters variable inputs and outputs The hydraulic presetting of the inputs and outputs of the controller selected via the Hydraulics menu Parameter 01 can be adjusted individually The preset hydraulics parameters can be changed individually for this purpose Thus hydraulics not covered by the automatic preconfigu...

Page 115: ... corresponding function is also available in the hydraulic system Example The parameters for setting the circulation pump are not accessible until the direct heating circuit pump output is assigned to the circulation pump function for example If a variable function requires an input value sensor then this sensor will be assigned to the matching variable input This input can then no longer be chang...

Page 116: ...nput for respective mixed heating circuit Circulation pump SLP DKP VA1 VA2 Electric heating rod SLP DKP VA1 VA2 Constant control DKP MK 1 MK 2 VF1 VF2 Sensor for connection to MK Fixed value control MK 1 MK 2 VF1 VF2 Sensor for connection to MK Boiler return control MK 1 MK 2 VF1 VF2 Bypass pump VV VA1 VA2 Charging pump DKP VA1 VA2 Boiler circuit pump 1 DKP VA1 VA2 Boiler circuit pump 2 DKP VA1 VA...

Page 117: ...r is KSPF separate solid fuel buffer tank sensor SFB can be configured optional Stratified tank loading pump DHC 43 2 VA1 VA2 SSLP Solar loading valve VA1 VA2 SLVF SLVS in DHW storage KSPF in buffer Solar forced dissipation valve VA1 VA2 6 2 Switching time program enabling The modular Smile SDC DHC 43 series of controllers features three switching time programs for each heating circuit that can be...

Page 118: ...ter heater temperature specification All connected wall devices react identically to parameter changes in the central device 6 4 Enabling Separate Control Mode To make operation as easy as possible for most of the applications a global control mode is set for all heating circuits when supplied For those rare cases in which a separate control mode is necessary e g for renters and landlords it must ...

Page 119: ...roller type SDC 6 6 Selection of hydraulic parameter presettings Each controller type covers a specific hydraulic diagram in its as supplied condition Depending on the configuration variants there is also the possibility of adapting the system by means of further parameter settings to hydraulic diagrams differing from the standard hydraulic system With parameter 01 in the Hydraulics menu a presele...

Page 120: ...mean value is obtained over a period of 2 hours Application Wooden houses lightweight brick buildings The mean value is obtained over a period of 8 hours Application Medium weight masonry in hollow blocks or bricks The mean value is obtained over a period of 24 hours Application Heavy masonry in tuff or natural stone 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 and 5 2 5 Direct Heating Cir...

Page 121: ...nsor circuits the heating circuit is regulated on the basis of a set heating characteristic curve and heating program corresponding to a fictitious outside temperature of 0 C with regard to the set minimum temperature 5 2 5 Direct Heating Circuit Mixed Heating Circuit 1 Mixed Heating Circuit 2 menu Pg 78 6 8 3 Outside temperature emergency operation value If a connected outside sensor fails during...

Page 122: ...alue to be expected For the heat demand coverage this value is taken as the basis for the design of the heating system This parameter defines the corresponding slope value of the heating curve of the heating circuit with regard to the climate zone 5 2 3 System Parameters menu Pg 71 6 8 6 Design temperature Until now configuration of the heating curve calculation occurred via the values Climate zon...

Page 123: ...d Heating Circuit 2 menu and the heating curve parameter 6 8 7 Summer switch off This function is only effective in control mode AUTOMATIC For higher outside temperatures normally above 20 C it does not make sense to keep the heating on in the building You can thus choose to switch off heating depending on the outside temperature according to the following criteria Outside temperature rise A switc...

Page 124: ...de sensor assignment Active summer deactivation is represented by a beach umbrella symbol in the basic display In case of separate operation of the heating circuits System Parameters menu Control Mode parameter the symbol is not displayed If two outside sensors are connected and they were assigned to different heating circuits the symbol is furthermore only displayed if both sensors fulfil the con...

Page 125: ...r example a mixed heating circuit is operated with room temperature sensing and the direct heating circuit is not the latter s heating curve and room temperature setpoint are to be set as low as possible In connection with a second outside sensor the frost protection function is activated as soon as one of the two outside temperatures drops below the frost protection limit In case of a faulty outs...

Page 126: ...menu parameter 19 has passed the demand value to the heat generator is retracted and the mixed heating circuit valve closes while the pumps continue running If no data are detected from the outside sensor e g because the sensor is defective only the pumps are switched on while heating is disabled The set minimum and maximum limits are taken into account while heating When the heat generator is act...

Page 127: ...unction activated all the pumps are switched on every day for approx 20 seconds to protect against blocking owing to corrosion in case of long switch off periods 24 h and the mixed heating circuit is opened temporarily during this period 5 2 3 System Parameters menu Pg 71 Function See also ...

Page 128: ... protection controlled by weather conditions The heating up characteristic is the same as for unlimited start up protection meaning the heat generator remains in operation until the set minimum temperature plus half of burner switching differential 1 is exceeded Below the minimum temperature the pumps remain switched off and the mixed heating circuit closed Once the heat generator has been switche...

Page 129: ...parameter is used solely for the response of the heat generator burner to the set minimum temperature WEZ KT min The function for the heat generator remains unchanged The mode of operation of the set limit is defined via the Heat Generator menu heat generator start up protection parameter There are three different modes of operation for the minimum temperature limit Minimum limit based on demand A...

Page 130: ...ting circuits minimum temperature limit If the boiler temperature BTactual is less than or equal to the parameter setting 27 BTmin HC the heating circuit pumps switch off DHCP SFP MCP The mixed heating circuit valves close If BTactual is greater than BTmin HC SCmin HC the heating circuit pumps and mixed heating circuit valves are enabled again 7 1 5 Heat generator sensor control mode There are var...

Page 131: ...electromagnetic boiler temperature controller is connected in series with the burner phase and the boiler temperature is thus limited by this boiler temperature controller Otherwise there is the danger of boiler overheating 5 4 6 Heat generator menu HEAT GENER pg 99 7 1 6 Minimum burner runtime This function extends the burner runtimes and reduces the standby losses After starting the burner a min...

Page 132: ...ching differential II When the heat generator temperature is below switching differential II stage I is switched on without delay Stage II is enabled after stage II delay has passed see Heat Generator menu Stage II is switched off as soon as the heat generator reaches the setpoint temperature plus half of switching differential I Stage II is switched on again as soon as the heat generator undersho...

Page 133: ...p coverage of heating demand at full load burner stages I and II b Switch off level stage II h Area 2 low use coverage of heat demand with partial load burner stage I only c Switch on level stage II i Area 3 increased use coverage of heating demand at full load both burner stages d Switch on level stage I x Boiler temperature e Swap of switching differential y Time f Theoretical progression with s...

Page 134: ...t during start up relief Stage II is switched on after the set time delay acc to time delay stage II In cascade mode this setting would be superseded by the cascade setting and is therefore not available The function hot water loading mode stage 1 2 allows defining of the loading mode for the hot water heater with 2 stage or 2 x single stage heat generators The following options are available 2 st...

Page 135: ...ture than the modulating stage which is switched on last This higher value is composed of the current setpoint temperature plus the set base load offset If several heat generators are switched though one control device the setting applies to every heat generator With 2 stage heat generators the counters for operating hours and burner starts see Parameter settings 5 4 pg 81 can be reset separately ...

Page 136: ... the switching differential for modulating burners is an asymmetric interval with the switch on level always 1 K below the setpoint temperature This offers the advantage that in case of another possible overshoot through the P part the burner is not switched off because the switch off point lies above the setpoint by a wider margin than the switch on point is below the setpoint overshoot reserve A...

Page 137: ...rner runtime irregardless of temperature based switch off conditions If the heat generator maximum temperature is exceeded or the heat generator minimum temperature is undershot the same functions apply as with conventional heat generators 7 1 9 Modulation of P part Xp The proportional part Xp defines how a step change of the setpoint effects a change of the corresponding actuator according to the...

Page 138: ...ning time to the control characteristics meaning that actuators with different runtimes react to the same deviation by readjusting by the same amount through adapting the action times The integral action time Tn remains unchanged in this However care must be taken that the latter must always exceed the runtime of the respective actuator 7 1 13 Modulation of start time The start time parameter dete...

Page 139: ...ring the start up phase With a setting of 0 the actuator valve remains always closed As soon as the set start time has expired the modulation switches to its normal control characteristics defined by the modulation parameters a Modulation e Base load b Upward downward modulation depending on the control deviation f On c Adjustment operation g Start d Start up phase x Starting load ...

Page 140: ...erator i e data exchange occurs in both directions In use the simplicity of the OpenTherm system is key The boiler setpoint is transmitted from the SDC controller to the automatic stokers via OpenTherm and feedback of the boiler actual value occurs from the automatic stokers in addition to the hot water actual and outside temperature and fault messages if appropriate Setting in the Heat Generator ...

Page 141: ...he specified demand value and switching differential s 7 1 17 External heat generator cut off If the assigned variable input is short circuited there will be a permanent deactivation of the heat generator It is cancelled again once the short circuit is remedied ATTENTION This function is meant exclusively for external override signals and not for safety switch off 7 1 18 Heat generator forced disc...

Page 142: ...d to the variable sensor input VI 1 Due to the high temperatures involved a PT 1000 sensor is used for this purpose The control device automatically evaluates the sensor data which are different from the data supplied by the standard sensors When a sensor fault is detected with the flue gas sensor active and if flue gas monitoring was set for temporary disable or permanent inhibit safety functions...

Page 143: ...ating hour counter can be set via a parameter The operating hour counter is deactivated If an operating hour counter is connected to the corresponding inputs of the controller operating hour counter inputs this value is called upon for counting Otherwise theoretical values are determined and included switching times and switching frequency of the outputs If a signal was detected once at the operat...

Page 144: ...ry flow temperature is the maximum selection of all the required flow setpoints An increase is to be entered under parameter 01 Para meter Designation Range Presetti ng Step Unit 01 Increase 10 50 0 0 5 K The setpoint for the secondary flow temperature has a maximum limit through code 02 There is a fixed minimum limit of 10 C 10 C corresponding to the functionality of the return interval flushing ...

Page 145: ...low the settable minimum travel in code 03 two step operation begins and the valve is closed The valve remains closed until the internal controller output reaches 10 again If a 10 controller output is reached the valve opens again to the minimum travel If the controller output drops below 10 again the valve closes again and the cycle starts from the beginning This means that whenever there are dem...

Page 146: ...in its limits The Proportional Range Adjustment Time and Motor Runtime control parameters can be set in parameters 04 and 05 Para meter Designation Range Presetti ng Step Unit 04 S gain 0 1 30 5 0 1 K 05 Adjustment time 0 pure P controller 0 60 3 1 min 06 Runtime of district heating valve 10 1800 120 1 s ...

Page 147: ...uire min volume flows in their networks This can be achieved through a high temperature differential between the flow and return a Example 1 factory setting e Example 4 b Return temperature limit f Starting points of the flexible return temperature limit in examples 3 and 4 c Example 2 x Return setpoint d Example 3 y Outside temperature ...

Page 148: ... lowest possible district heating return temperature and thus good heat exploitation are obtained The values for the maximum limitation of the district heating return temperature code 08 and the starting point of the flexible district heating return temperature limitation code 09 can be set for the operation with heating circuits The flexible return temperature limitation can be switched off by se...

Page 149: ...9 Starting point of the flexible district heating return temperature Off 40 10 Off 0 5 C 11 Return limit 0 Temperature 1 Volume flow and temperature 2 Heat output and temperature 0 1 2 0 7 2 4 Return temperature limit for hot water loading In the case of hot water loading a special constant return setpoint applies It is valid only if the hot water loading pump is operating The return setpoint is t...

Page 150: ...ating circuit cannot be used as a heating circuit anymore When the hot water pre control is active the request for hot water loading is not sent directly to the energy management unit and further to the district heating valve but instead to the hot water pre control The hot water pre control forwards the setpoint taking into account the parameter defined offset to energy management and adjusts to ...

Page 151: ...ation with hot water pre control parameter 08 tank drainage protection does not act directly on the heat generator but on the hot water pre control Parameter 08 is always adjustable for function with pre mixer Here the OFF and ON settings have different effects which are described in the following With the setting OFF there will be no start up protection through the hot water pre control The tank ...

Page 152: ...identical extended running times must be selected for them 7 2 7 Quick hot water control For monetary reasons hot water tanks are not used in many district heating systems especially in Eastern Europe The hot water setpoint temperature is held in a closed loop pipeline here see hydraulic example a Flow from closed loop pipeline b Draw off points Minimum spread between the tank sensor and the retur...

Page 153: ...y outputs The valve continually adjusts the hot water setpoint temperature at the strap on flow sensor no hysteresis The cycle time of the control unit must be less than or equal to 3 sec Normally a mixed valve with a runtime of 30 to 60 sec is used Attach a return sensor so that the mixing valve responds to the varying draw off behaviour A conclusion is made based on the quantity drawn off via th...

Page 154: ...of hot water control mode external operation If the energy supply for hot water loading is not provided through the district heating valve no hot water demand may be sent to the heat generator The following setting needs to be selected for this case Hot Water Circuit menu parameter 07 Hot Water Circuit control mode 7 external operation The hot water pre control is part of the hot water loading Con...

Page 155: ... loading the heating circuits do post a setpoint value to energy management Mixed heating circuits must operate at the temperature required by the hot water demand Direct heating circuits remain switched off Hot water loading with priority operation in the system has priority The mixed heating circuits must shut in this case 7 2 10 Circulation pump control mode During service water loading it shou...

Page 156: ...is assures that the limit sensor is adequately supplied in the return 7 2 13 Heat meter for additional limitation according to the volume flow or thermal output The requirement for this function is the heat meter whose information pulse per volume or pulse per thermal output is called upon for this limit Calibration of the thermal output and the volume flow with parameters 12 and 13 allows calcula...

Page 157: ...tor It can be connected through variable settings at one of the variable outputs or at the direct circuit pump output A charging pump connected to the central device under address 10 will run as soon as any demand is present on the data bus including all heating and hot water circuits within the control network A charging pump connected to an extension controller address 20 30 50 runs only on dema...

Page 158: ...a request to the heat generator is withdrawn 7 2 16 Boiler circuit pump This function is only active if the BOILER CIRCUIT PUMP 1 function was assigned to one of the outputs i e direct heating circuit pump variable output 1 or variable output 2 in the Hydraulics menu This function is mainly used with multi boiler systems with thermohydraulic distributors and is used for water side cut off of a hea...

Page 159: ...rn temperature required by some heat generators the control system features various options for raising the return temperature Once one of these return control options is active a menu is activated where the appropriate settings can be entered The parameter minimum return limit determines the lowest allowable return flow temperature for systems with direct or indirect return control When the heat ...

Page 160: ...Hydraulic Components SDC DHC 160 EN2H 0221GE51 R0812 5 4 8 Return increase menu RETURN CONTR Pg 105 See also ...

Page 161: ...is switched off with a time delay in accordance with the set value To avoid intermittent operation of the bypass pump the return sensor must always be positioned downstream of the mixing point for this mode of return temperature control 7 2 17 2 Return maintenance through controlled feed water addition If the control unit is equipped with a mixed heating circuit output this output can be programme...

Page 162: ...ty Indirect return control is only active with mixed heating circuits that are in heating operation as well It does not affect a heating circuit in reduced operation To avoid excessive pulsing we recommend enabling the connected consumers heating and hot water circuits with staggered switch on times This function does not affect direct heating circuits Indirect return control is only feasible for ...

Page 163: ...n between the change in the flow temperature and the change in the outside temperature With a larger heating surface such as with floor heaters the heating curve has a less extreme slope than with a smaller heating surface e g radiators The set value refers to the lowest outside temperature used for heat demand calculation This parameter is to be set by the technician and should not be altered any...

Page 164: ...rdless of the changes in the outside temperature If an automatic correction of the heating curve heating curve adaptation is made at the service level this parameter can no longer be manually set Instead of the slope display the message HEATING CURVE starts to flash during the adjustment and is corrected continuously Recommended settings Floor heating 0 3 1 0 Radiator heating 1 2 2 0 Convector hea...

Page 165: ...limit in case of switch off in reduced automatic mode with the activated ECO function above the frost protection limit in case of switch off in continuously reduced mode with activated ECO function in case of automatic summer switch off Floor minimum limit Ventilation pre adjustment warm air curtain Convector heating ATTENTION To protect the floor heating systems against accidental overheating mal...

Page 166: ...afety switch off of the heat generator is prevented While the pump extended running of a mixed heating circuit pump MC 1 and MC 2 only is active the mixed heating circuit continues to adjust its setpoint without forwarding a demand value to the heat generator 5 4 4 Direct heating circuit menu UNMIXED CIRC Pg 92 7 3 1 8 Screed function This function is not active if the heating circuit control is u...

Page 167: ...ing the heating of fresh floor covers heating according to a mandatory temperature profile This is a special function that is not interrupted by any other control mode including manual operation or emission measurement The screed function can be activated for mixed heating circuits and in special cases e g in conjunction with a condensing boiler also for a direct heating circuit When the screed fu...

Page 168: ...s a preset temperature profile Starting with 25 C on the first day the requested temperature rises by 5 C per day over the following days until the maximum temperature of the heating circuit is reached After that the setpoint temperature is reduced with the same stepping until the base point of 25 C is reached again Maximum temperature setting for the heating circuit 40 C 1 day constant heating at...

Page 169: ...2 The control circuit is operated with a constant temperature specification The demand value is transmitted to the heat generator The switching program of the respective heating circuit and the control modes can be activated The specification of the constant temperature occurs via parameter constant temperature setpoint Upon activation of the function on a mixed heating circuit output a flow senso...

Page 170: ...flow temperature is corrected purely by weather conditions for room influence and connected outside sensor With the room sensor switched on the heating circuit is controlled based on the weather taking into account the current room temperature The room temperature deviation is taken into account based on the room factor parameter setting If SDW 30 wall devices are connected the actual room tempera...

Page 171: ...o difference between the desired TARGET and the current ACTUAL room temperature the direct heating circuit s flow temperature is controlled according to the set heating curve If there is a difference between the room temperature and the setpoint the heating curve is shifted parallel to the room temperature axis so that the deviation is compensated The amount of the displacement depends on the sett...

Page 172: ...equired flow setpoint and transmits this information to the central device With this setting the control of the respective heating circuit is completely room guided Weather condition control is inactive However the parameters for weather response heating curve setting can still be entered 7 3 4 4 Switch on switch off optimisation The switch on optimisation leads to the set day setpoint being reach...

Page 173: ...ation active 2 Display of room temperature room sensor active operation disabled 3 Display of room temperature room sensor off operation active 4 Room factor OFF OFF 10 500 Influence active RC Room controller active 26 Room setpoint ramp OFF 0 5 60 K h OFF 41 Switch on optimisation OFF OFF 1 Adaptation off 2 Adaptation on 3 Adaptation restart 42 Min pre heat time 0 set value of parameter 43 0 5 43...

Page 174: ...e set heating cycle e g 6 a m This is only possible with a room sensor Without a room sensor parameter 45 is active without a room sensor Parameter 43 max pre heating time This parameter setting limits the duration of pre heating which is set to 5 hours at the factory This is only possible with a room sensor Without a room sensor parameter 45 is active without a room sensor Parameter 44 min jump b...

Page 175: ...f the pre heating time Pre heating time pre heating time 0 C 20 C x room setpoint outside temperature Parameter 47 lowering ramp This parameter setting specifies how fast the temperature is reduced before the end point of the heating cycle is reached e g 10 p m Switch on optimisation with room sensor adaptation a Calculation via the controller b min pre heat time c max pre heat time Switch on opti...

Page 176: ...ot damaged The function starts with the switching times switch on switch off point and the control mode change This function helps prevent jumps in temperature For this reason The ramp is recalculated starting from the actual room temperature after a power failure A setpoint jump does not occur If a new setpoint jump setpoint increased lowering initiated occurs before the room setpoint temperature...

Page 177: ...eating limit setting 2 K Switch off at flow setpoint 24 C 22 C 2 K Switch on at flow setpoint 26 C 22 C 2 K 2 K The SUMMER SWITCH OFF function System Parameters menu parameter 04 has priority over the HEATING LIMIT function The FROST PROTECTION function System Parameters menu parameter 05 has priority over the HEATING LIMIT function Boundary conditions ...

Page 178: ...e is to be adjusted accordingly 7 3 4 8 Mixed heating circuits cooling switch over If the cooling function was activated at a variable output Hydraulics menu parameters 6 and 7 setting 25 the additional parameters appear in the System Parameters menu parameter 25 and in the Mixed Heating Circuit 1 Mixed Heating Circuit 2 parameter 28 The cooling function must also be activated via parameter 28 hea...

Page 179: ...g function is not active A switching differential is required With the cooling function active the cooling switch over output in the Hydraulics menu parameter 06 07 setting 25 ON This is switched on inversely via an input on the heat pump If cooling mode is interrupted due to the switching conditions of the timer ECO lowering phase the output switches OFF even if the switching conditions are prese...

Page 180: ... to a variable input Cooling without humidistatic switch off Cooling with humidistatic switch off If the set humidity is exceeded a short circuit results A triggered humidistat interrupts cooling mode Active cooling does not affect the heat generator Demand from other heating circuits for the heating generator or hot water loading is served in parallel NOTE ...

Page 181: ... 4 9 Heating circuit name No access restriction empty 00000 ZZZZZ The max three heating circuits available in a controller are provided with the short names DC direct heating circuit MC1 mixed heating circuit 1 and MC2 mixed heating circuit 2 The heating circuits are given unique names here To enable easy assignment of the heating circuits to the living area by the end customer a unique 5 digit sh...

Page 182: ...switching differential heating is temporarily stopped heating circuit pump switched off Heating is resumed as soon as the room temperature of the respective heating circuit drops 0 5 K below the switch off temperature Example Daytime room setpoint 22 C Thermostat function set value 4 K Interruption of heating TRoom 22 C 4 K 26 0 C Resumption of heating TRoom 26 C 0 5 K 25 5 C Set value OFF disable...

Page 183: ...et maximum value the mixed heating circuit valve is adjusted to this maximum temperature The flow temperature then remains ignored 7 3 4 10 1 Mixed heating circuit control 7 3 4 10 1 1 Proportional part Xp The proportional band Xp defines how a step change of the setpoint effects a change of the corresponding actuator according to the selected setting Example Consider an actuator moving though an ...

Page 184: ...K higher flow temperature after the set time The adjustment time can be determined through the Ziegler Nichols method The mixed heating circuit is closed initially and the heat generator is taken to the maximum temperature for the heating circuit concerned As soon as half of all consumers at the circuit to be measured have been opened the mixer is fully opened from cold condition room temperature ...

Page 185: ...eviation Shorter sample times allow finer adjustments 7 3 4 10 1 4 Actuator runtime This function allows adjustment of the actuator with regard to its finite runtime to the control characteristics meaning that actuators with different runtimes e g 1 min 2 min 4 min react to the same deviation by readjusting by the same amount through adapting the action times The integral action time Tn remains un...

Page 186: ... pulse with control deviation XW 25 b Actuator behaviour with control deviation 50 adjustment time Tn 7 min h P part c Actuator behaviour with control deviation 25 adjustment time Tn 7 min i I part d Adjustment time Tn XW 25 x Mixed heating circuit opening e Adjustment time Tn XW 50 y Action time min f Actuator pulse with control deviation XW 50 ...

Page 187: ...lowed by additional actuation pulses if the control deviation is not yet remedied I part The adjustment time remains constant despite varying control deviations 7 3 4 10 1 5 Actuator end position function This function determines the type of control signal in the end positions OPEN or CLOSED of each actuator 1 Continuous voltage at connection OPEN or CLOSED at the respective end position 2 De ener...

Page 188: ...mperature settings in the switching time programs are automatically adjusted when the hot water daytime temperature is changed Example Before Daytime hot water temperature value 50 C Temperatures in switching time program 05 00 hours 08 00 hours 60 C 08 00 hours 16 00 hours 50 C 16 00 hours 22 00 hours 60 C Example After Daytime hot water temperature value 52 C Temperatures in switching time progr...

Page 189: ... higher setpoint than the setpoint of the legionella temperature Type of temperature measurement This function determines the type of temperature measurement in the hot water tank In general an electronic temperature sensor immersion sensor in hot water tank is used The temperature is measured via the change in resistance of this sensor here Alternatively hot water provision can also be controlled...

Page 190: ...est of the heating system reacts to heat demand from the hot water tank There are 5 different setting options Parallel operation During hot water circuit loading the heating circuits remain operative Priority mode During hot water loading the heating circuits are put out of operation They are restarted as soon as the hot water circuit loading pump extended running time is over If the hot water set...

Page 191: ...dure is continued at the end of the intermediate heating Hot water loading and intermediate heating are carried out in an alternating order until hot water tank loading is finished Priority isolating circuit Hot water loading is carried by means of a three way switch over valve the heating circuit pump is also the hot water circuit loading pump At the end of the hot water loading and at the expira...

Page 192: ...ON In case of hot water temperature specifications above 60 C this function should not be activated to avoid safety switch off in particular for heat generators with a low water capacity Tank discharge protection must be set accordingly for hot water loading from buffer tanks This function determines the default setting of the tank loading temperature compared to the set hot water circuit setpoint...

Page 193: ...ditional hot water priority mode HC setpoint HC setpoint DC setpoint MC setpoint AUTO Active OFF OFF Active OFF OFF OFF OFF OFF For complete loading of a hot water tank by means of automatic measuring point switch over between tank sensors 1 and 2 layer loading The measured value of the hotter sensor SF1 or SF2 is evaluated for the activation of the loading pump Termination of loading is carried o...

Page 194: ...active hot water loading reversion of stages occurs under consideration of the configured switch off delay If heating circuit operation is active with more stages than were enabled for hot water circuit operation and hot water loading then occurs in priority mode the stages above and beyond the number of stages enabled for hot water loading are switched off directly Reversion of the activated stag...

Page 195: ... a variable output is assigned to a circulation pump The output controls a hot water circulation pump The use of the economy interval minimises the usual circulation losses owing to adjustable switch on intervals during operation and determines the standstill time of the hot water circulation pump within an adjustable period economy interval This parameter determines the length of the period and h...

Page 196: ...e g an MC2 for SDC 9 21 Hot water parameter 16 allows switching off of the circulation pump during hot water loading 7 3 5 2 1 Electrical heating element ELH The electrical heating element ELH provides 2 different functions depending on the parameter settings 1 Adjustment in Hydraulic menu parameter 5 6 or 7 setting 5 electrical heating element The ELH controls via circuit breaker an electrical he...

Page 197: ... allows setting the hotwater setpoint WS to a temperature value that has dropped below the EWB Offset of the hot water setpoint As soon as the hot water setpoint is reached the function will be disabled again The heat generator demand is switched off while EWB is active This application is useful for switching on the ELH in addition in case an electrical water heater has turned out or the capacity...

Page 198: ...e differential between collector flow and tank will become bigger than the set value and the solar loading pump is switched on to load the buffer tank The minimum set value is 3 K above the switch off differential switching differential OFF If the temperature differential between the collector flow and tank falls below or equal to the set value the solar loading pump is switched off and loading te...

Page 199: ...allel operation During solar loading demand for the heat generator is permitted Solar priority mode hot water setpoint control During solar loading demand for the hot water control at the heat generator is suppressed Solar priority mode buffer setpoint control During solar loading demand for the buffer control at the heat generator is suppressed Heat generator cycle disable only with solar control...

Page 200: ... buffer setpoint by the set amount solar priority mode is cancelled until the buffer setpoint has been reached Example Setpoints at buffer of heating circuits 45 C Buffer offset 10 K Switch over set value 20 K There is no demand for the heat generator until the buffer temperature drops below 35 C Heat balancing is activated through a parameter setting The user can select between flow calculation v...

Page 201: ...sical values of volume flow density and specific heat capacity form the basis for determining the solar heat balancing and the solar power and are calculated according to the mathematical relation W V t ρ cW Δδ tSOP The results can be seen on the information level W Heat balancing V t Volume flow of the heat carrier medium ρ Density of the heat carrier medium cW Specific heat capacity of the heat ...

Page 202: ...ion ensures that a controlled heat generator supplies the additional energy to the buffer tank or the heating and hot water circuits respectively If no controlled heat generator is used e g heating by wood boilers only buffer functions such as forced dissipation into the heating circuits can be used by connecting and activating buffer sensor 1 to a variable input To support the full range of avail...

Page 203: ...water tank b Buffer tank Heating circuit and hot water controls send their demand values to buffer control Buffer control demand additional energy from the heat generator via the buffer loading pump See the table below for detailed correlations Control mode 2 Loading control for heating circuit demand System hydraulics a Heat generator c Hot water tank b Buffer tank ...

Page 204: ...ontrol for heating circuit and hot water demand System hydraulics a Buffer tank c Hot water tank b Heat generator Heating circuit and hot water controls send their demand value to buffer control The buffer loading pump output switches ON when the energy demand can be met by the buffer If the energy in the buffer is insufficient buffer control demands additional energy from the heat generator and t...

Page 205: ...ator As control mode 3 except that the demand from hot water control are sent directly to the heat generator An active hot water priority only acts on the heating circuits when there is no buffer discharge in progress See the table below for detailed correlations Control mode 5 Loading control with hot water switch over valve System hydraulics a Heat generator b Buffer tank ...

Page 206: ...water tank b Heat generator This hydraulic layout is used when an alternative energy buffer tank is added to an existing system In such systems it is often the case that there are existing unit boilers with integrated hot water circuit loading tank and hot water loading in the boiler All heat demand is forwarded to the heat generator When the buffer tank can cover the energy demand the heat genera...

Page 207: ...tection X X X Buffer frost protection monitoring X X X Buffer minimum temperature monitoring X X X Buffer maximum temperature monitoring X X X X X X Buffer forced dissipation into HC HW HC HC HW HC HC HC HW Buffer siphon function X X X Loading temperature offset acts from HC HW HC HC Heat generator start up protection on buffer loading pump X X X Buffer loading pump with no demand OFF OFF OFF OFF ...

Page 208: ... loading pump function if heat generator is not available and buffer start up protection is not active ON ON Action of heating generator start up protection on heating circuits HDCP MC1 MC2 No No Yes Yes No Yes Action of heat generator start up protection on hot water circuit tank loading pump No Yes Yes Yes No Yes Action of heat generator start up protection on buffer loading pump Yes Yes No No Y...

Page 209: ...generator is not available if An external heat generator disable is active at a variable input Heat generator cycle disable is active via configuration in the Solid Fuel menu parameter 05 Heat generator cycle disable is active via configuration in the Solar menu parameter 07 A heat generator is not present in the system e g purely solid fuel buffer combinations Discharge control 1 The heating circ...

Page 210: ...alue hot water 65 C buffer setpoint temperature 65 C A required offset value e g hot water load temperature offset has already been taken into consideration in the demand value of the heating circuits When there is heat demand for the buffer tank from the heating circuits or from hot water this request will be maintained at least to the minimum temperature limit When the temperature drops below th...

Page 211: ...nk The heating circuits into which the forced dissipation is routed are determined by the respective parameter OFF No heat dissipation Tank loading pump with provision tanks only Dissipation of the excess heat occurs to an existing water heater ATTENTION Use a thermal mixing valve in accordance with the regulations as there is a risk of scalding Heating circuit pump s Any excess heat is dissipated...

Page 212: ...r start up protection is switched on all consumer circuits heating circuits hot water are separated on the water side pumps switch off The buffer start up protection is disabled pumps are switched on again when the buffer temperature exceeds the buffer minimum temperature plus half of the buffer switching differential All consumer circuits remain in operation when buffer start up protection is swi...

Page 213: ...tor Heat gene rator Buffer Buffer sensor 2 BS2 As an option the buffer tank can be equipped with the second buffer sensor BS2 via the variable inputs for stratified loading The buffer is loaded through the active heat generator as soon as the higher temperature of the two sensors undershoots the setpoint value Loading though the heat generator is terminated when the lower temperature of the two se...

Page 214: ...nk buffer sensor input can be used as a sensor input for several uncontrolled heat generators e g solar or solid fuel ATTENTION Note the sensor position and stratification conditions A forced switch on will be initiated for the solid fuel loading pump if a solid fuel boiler sensor is defective The solid fuel function allows the integration of solid fuel boilers usually in combination with a buffer...

Page 215: ...ue is constantly 3 K below the selected activation difference in order to prevent rear discharging of the buffer tank Heat generator solid fuel cycle disable The solid fuel cycle disable serves to prevent frequent switching between loading through the solid fuel boiler and loading through a conventional oil gas heat generator After the solid fuel loading pump has been switched off the set time mus...

Page 216: ...ority tank remains below the set switch over temperature and if the loading conditions for the second priority tank temperature sensing by the collector tank buffer sensor usually buffer tank for heating support are fulfilled the solar loading pump SOP is temporarily switched off after the time set in the Solar menu parameter 15 During the switch off time the differential between the collector flo...

Page 217: ...ve priority supply of energy When the buffer temperature exceeds the buffer setpoint by 2 5 K the 3 way switching valve is hydraulically coupled to the lower region of the buffer tank so that the entire buffer tank can be loaded Another switch over to the upper region of the buffer tank is initiated as soon as the buffer temperature undershoots the buffer setpoint temperature by 2 5 K Partial buff...

Page 218: ...pecial handling with regard to the outside temperature disable occurs so that a heating pump can be combined with supplemental heat generators Below a set outside temperature the heat pump first heat generator is then disabled but the supplementary heater second heat generator remains enabled If no inverse outside temperature disable was configured Heat Generator menu parameter 38 OFF a configured...

Page 219: ...ut Up to three different fault messages can intrude via variable inputs 7 3 10 2 Global fault message output This function must be activated in the Hydraulics menu for a variable output VO1 or VO2 The function becomes active on detection of fault messages of any kind It serves as a global fault message output for connecting optical or acoustic alarm signal devices 7 3 10 3 Timer Only active if set...

Page 220: ...ect circuit DC mixed heating circuit 1 MC1 mixed heating circuit 2 MC2 hot water circuit HW or the entire system ALL i e globally on all central devices on the data bus system The control mode depends on the wiring at the respective variable input in the following way Connection terminal of variable input 1 2 3 open Control based on the current control mode AUTO RED HEATING HEATING STANDBY Connect...

Page 221: ...n value in the information display This function is controller independent and is for information only 7 3 10 6 Demand contact This function is active for a demand contact if demand contact was selected for a variable contact and a heating circuit function was assigned to the associated output The heating circuit functions are mixed heating circuit direct heating circuit constant controller and fi...

Page 222: ... signaled by the string disable in the status display a closed contact is identified by the string demand A variable input that has been defined as a demand contact acts on the heating circuit in the following way Variable input open No demand The heating circuit is switched of unconditionally no frost protection no standby function Variable input short circuited Demand The heating circuit is in c...

Page 223: ...ntral device each The following figure shows the maximum possible expansion stage of the bus system The individual devices in the SDC DHC 43 bus system contain a unique address It is set in the corresponding parameter in the Data Bus menu Assignment is carried out using the table below Address Device type Assignment 10 SDC DHC 43 Central device 1 as base unit 20 SDC DHC 43 Additional central devic...

Page 224: ...increase 7 3 11 2 3 Tank control mode tank priority operation Each central device can carry out hot water circuit loading For loading in priority operation hot water circuit loading that has been started disables all other heating circuits and hot water circuit loading within the bus system If tank loading occurs in parallel operation all heating circuits in the system remain active and an additio...

Page 225: ...2 7 Fault messages Status indications Fault messages and status indications are sent from the central device to the associated wall units and displayed there 7 3 11 2 8 Examples with multiple control devices Heating system with a two stage heat generator industrial water production and four mixed heating circuits The following diagram shows the hydraulics of this system a Boiler b Hot water tank E...

Page 226: ...sed and flow sensor of heating circuit 2 The following components are connected to the second control device with bus address 20 Mixed heating circuit pump mixed heating circuit open closed and flow sensor of heating circuit 3 Mixed heating circuit pump mixed heating circuit open closed and flow sensor of heating circuit 4 Heating system with a two stage heat generator two mixed heating circuits a...

Page 227: ...r of the heat generator can be influenced by a deviation between the total flow setpoint temperature and the total flow actual temperature The PI controller can be influenced via three setting options P part Proportional part of the controller Sample time The sample time is a controller internal value which defines the time interval between two subsequent actuator pulses in the presence of a contr...

Page 228: ...Hydraulic Components SDC DHC 228 EN2H 0221GE51 R0812 Example Initial values P part 0 5 K Sample time 20 sec Adjustment time 600 sec Total flow setpoint w 68 C Total flow actual value x 53 C ...

Page 229: ...ng circuit to which the SDW 30 is to be assigned bus address After the input has been confirmed feedback of the heating circuit DC MC1 MC2 and the central unit CU to which the digital wall device has been assigned is output Assignment is carried out on the basis of the following table Address CD address Assignment 11 10 CU 1 Direct heating circuit 12 10 CU 1 Mixed heating circuit 1 13 10 CU 1 Mixe...

Page 230: ...to the control device With an SDW 10 it is possible to detect the room temperature adjust the room setpoint temperature and change the control mode for a heating circuit remotely The settings only apply for the assigned heating circuit The bus address of the wall device is used to specify on which heating circuit the room sensor and the adjustment of the control mode are to act The connection is c...

Page 231: ...ng sequence AUTOMATIC MODE HEATING LOWERING AUTOMATIC MODE After control mode selection the selected control mode is transferred to the central device Only the control mode of the heating circuit to which the SDW 10 is assigned is transferred The heating circuit is controlled constantly in accordance with the specification of the automatic program P1 P3 set in the central device plus or minus the ...

Page 232: ...SHING BRIEF FLASHING Error at address setting FLASHING ON ON Bus fault as well as indication when parameters are disabled ON FLASHING ON Party can be set via central device OFF OFF FLASHING Absent can be set via central device FLASHING OFF OFF Holiday can be set via central device OFF Flash OFF Definition Flashing 0 8 sec on and 0 8 sec off Brief flashing 0 08 sec on and 0 7 sec off Flash 0 08 sec...

Page 233: ...all room functions of the heating circuit are in effect Direct Heating Circuit Mixed Heating Circuit 1 or Mixed Heating Circuit 2 menu parameter 4 active In conjunction with the NTC 20 room sensor this means a shift of the controller software to the central device The configuration of the room controller with NTC 20 room sensor operation occurs via additional parameters in the central device menu ...

Page 234: ... control system features the possibility to couple and cascade several boilers The cascade control is independent of the type of heat generators to be combined For instance condensing boilers can be easily combined with atmospheric gas boilers The system automatically recognises a cascade by checking if several central devices have programmed a heat generator or if more than one condensing boiler ...

Page 235: ...hing differential is exceeded the run down of heat generators is controlled by the switch off delay The setting has to be adjusted to the afterheating characteristics of the heat generators To ensure the balanced utilisation of the heat generators within a cascade a runtime dependent leading stage swap can be activated After the set operating time of the presently leading heat generator has passed...

Page 236: ...n delay Additionally the requested stage number must have been sent to central device 10 as the active status response The additional boiler stages can be switched on by using a fixed time delay Switch off of the dynamically determined switch on delay This can be used for the fixed control of the switch on delay of an additional heat generator e g of a heat pump Therefore in the Heat Generator men...

Page 237: ... disable or outside temperature disable is ignored within the stage sequence The next available heat generator will be switched on instead 7 3 12 3 4 Delay enabling full load in cascade operation The switch over power set within the cascade selection level is only intended for the operation of automatic stokers As long as the last burner stage is not started all burner stages up to that point whic...

Page 238: ...was carried out via the configuration and the peak load boiler was in demand a change of the leading group can be activated via a parameter If this parameter is set to ON the group of peak load boilers take over the base load upon demand and the base load boilers take over adjustment of the flow temperature Further switching of stages is still only active for the actual base load boilers 7 3 12 3 ...

Page 239: ...st values from the master to the slave devices takes no longer than approx 3 seconds 7 3 13 Commissioning maintenance and troubleshooting help 7 3 13 1 Automatic set function The central devices are equipped with a function which ignores unused sensors and control functions Fault messages from non connected sensors are not displayed The AUTO SET function is only active at power up There are two po...

Page 240: ...uration carried out is not changed by the AUTO SET function A change is only carried out if one of the settings specified above is applicable This ensures that the AUTO SET function cannot for example ever log off a return increase at the MC2 or re function it into a mixed heating circuit 7 3 13 2 Emission measurement not for DHC 43 By pressing this key the heat generator is controlled for 20 minu...

Page 241: ...water loading pumps are stopped The emission measurement is continued from the moment of termination with the previously saved remaining time Safety temperature limiter check by the heating technician Release the input button The emission measurement still active is stopped with the key 7 3 13 3 Relay function test Depending on the controller version various outputs can be tested This is not only ...

Page 242: ...ng sequence OFF STAGE 1 STAGE 1 2 STAGE 1 OFF 2x single stage heat generators Heat Generator menu parameter 1 3 Switching sequence OFF HG 1 HG 1 2 HG 2 OFF Modulating mode Heat Generator menu parameter 1 4 Switching sequence OFF ON OPEN STOP CLOSED OFF Pump test Direct heating circuit pump mixed heating circuit pump tank loading pump variable output 1 variable output 2 Switching sequence OFF ON OF...

Page 243: ...nsor test sequence is similar to the final device test Value Range OT 50 C 40 C VF 10 C 90 C SF 5 C 90 C RT SDW 10 SDW 30 0 C 40 C SVLF 5 C 90 C SBUS 5 C 90 C VF1 evaluation as NTC 20 not PT 1000 5 C 90 C VF2 5 C 90 C VF3 5 C 90 C Confirmation is required for each sensor value All available inputs are checked Unoccupied inputs are marked with Meaning Display Value OK 80 C Value outside the sensibl...

Page 244: ...corresponding central device Bottom right Address of the operated central device Bottom left Display of the control network 1 ZG10 2 ZG20 3 ZG30 Top Display of the peripheral devices of operated central device 1 2 3 wall devices DC MC1 MC2 assigned to operated controller Example The central device is operated at address 10 Two central devices are found in the bus system addr 10 and 20 A wall unit ...

Page 245: ...ending on the type and allocation with fault code 30 to 40 and index 0 1 or 2 These error messages evaluate the control result to be expected They appear depending on the type and allocation with fault code 50 to 60 and index 0 1 or 2 These error messages refer to address faults such as double issuance or non recognition of address settings on the data bus They appear with fault code 70 and index ...

Page 246: ...nsor Short circuit 13 1 System VI 2 Interruption 14 0 System VI 2 Short circuit 14 1 System VI 2 Fault message 14 7 System VI 3 Interruption 15 0 System VI 3 Short circuit 15 1 System VI 3 Fault message 15 7 System VI 1 Interruption 16 0 System VI 1 Short circuit 16 1 System VI 1 Fault message 16 7 System Buffer sensor of collector Interruption 17 0 System Buffer sensor of collector Short circuit ...

Page 247: ... Flue gas temperature STL triggered 33 8 logical Boiler temperature Not reached 50 4 logical Tank temperature Not reached 51 4 logical MC1 flow temperature Not reached 52 4 logical MC2 flow temperature Not reached 53 4 logical Room temperature HC Not reached 54 4 logical MC1 room temperature Not reached 55 4 logical MC2 room temperature Not reached 56 4 System Address Address collision 70 0 System...

Page 248: ...o minimise the danger of system freezing Five fault messages from automatic stokers condensing versions with OpenTherm These fault messages come from automatic stokers and are categorised as either locks blockages or warnings The display and further processing of logical fault messages from the SMILE system can be enabled or suppressed via a corresponding configuration see System Parameters menu p...

Page 249: ...her fault messages may arrive from it They are displayed as follows Fault type Fault code Field 1 Field 2 Field 3 Water pressure S0 1 Water pressure HIGH Water pressure S0 5 Water pressure LOW Water pressure S0 2 Water pressure MIN Ventilation S1 0 Ventilation Maintenance S2 0 Maintenance Switch off Switch off OFF Service 240 1 Service The control unit features two fault message logs FAULT MESSAGE...

Page 250: ...rding this and switches off the system The message Heating system off appears instead of the fault message in this case If a heat generator defect occurs fault message 30 1 or 31 3 and system frost protection is active at the same time boiler start up protection is switched off and thus the heating circuit pumps are started to minimise the danger of system freezing 7 4 1 Basic display fault stack ...

Page 251: ...nstant over the entire measurement range With sensor compensation the respective amount must be noted down as otherwise the factory setting is no longer valid and the reference value is lost The original factory setting cannot be restored via a reset Compensation in the case of very longer sensor cables Constant external temperature influence on sensors 7 4 1 2 Full controller reset To revert the ...

Page 252: ...evices wall device PC modem or gateway Max bus length 50 m Power supply via bus 12 V 150 mA Ambient temperature 0 50 C Storage temperature 25 60 C Degree of protection IP 30 Protection class as per EN 60730 II Protection class as per EN 60529 III Radio protection EN 55014 1993 Interference resistance EN 55104 1995 EC conformity 89 336 EEC Housing dimensions 144 x 96 x 75 mm W x H x D Housing mater...

Page 253: ...sor OT heat generator sensor BLRS BS tank sensor DHWS mixed heating circuit 1 flow sensor VF1 mixed heating circuit 2 flow sensor VF2 variable input 1 VI 1 setting not for exhaust gas sensor variable input 2 VI 2 variable input 3 VI 3 collector tank buffer sensor SBUS C Ω C Ω C Ω C Ω C Ω 50 0 1659706 9 0 115575 31 0 15180 71 0 2989 111 0 793 7 49 0 1541379 8 0 109189 32 0 14511 72 0 2882 112 0 770...

Page 254: ...0 923 9 14 0 154185 27 0 18224 67 0 3464 107 0 896 0 13 0 145450 28 0 17404 68 0 3338 108 0 869 1 12 0 137262 29 0 16624 69 0 3216 109 0 843 1 11 0 129583 30 0 15884 70 0 3100 110 0 818 0 10 0 122380 8 2 2 PT 1000 For variable input 1 VI 1 setting of exhaust gas sensor collector flow sensor SPFS C Ω C Ω C Ω C Ω C Ω 40 0 842 7 1 0 1003 9 41 0 1159 3 81 0 1312 8 121 0 1464 5 39 0 846 7 2 0 1007 8 42...

Page 255: ...9 150 0 1573 1 10 0 960 9 31 0 1120 6 71 0 1274 6 111 0 1426 7 9 0 964 8 32 0 1124 5 72 0 1278 4 112 0 1430 5 8 0 968 7 33 0 1128 4 73 0 1282 2 113 0 1434 3 7 0 972 6 34 0 1132 2 74 0 1286 0 114 0 1438 0 6 0 976 5 35 0 1136 1 75 0 1289 9 115 0 1441 8 5 0 980 4 36 0 1140 0 76 0 1293 7 116 0 1445 6 4 0 984 4 37 0 1143 8 77 0 1297 5 117 0 1449 4 3 0 988 3 38 0 1147 7 78 0 1301 3 118 0 1453 1 2 0 992 ...

Page 256: ...function PT 1000 e g for exhaust gas sensor connection 8 4 Digital inputs Designation Brief description Input type Measurement range Impulse metering unit Imp Extra low voltage 10 Hz Burner stage 1 operating hour counter BZ1 230 V OFF ON Burner stage 2 operating hour counter BZ2 230 V OFF ON ...

Page 257: ...ect Set by On Mon 1 Cont circuit Time Setpoint Opt Tue 2 Cont circuit Time Setpoint Opt Wed 3 Cont circuit Time Setpoint Opt Thu 4 Cont circuit Time Setpoint Opt Fri 5 Cont circuit Time Setpoint Opt Sat 6 Cont circuit Time Setpoint Opt Sun 7 Cont circuit Time Setpoint Opt ...

Page 258: ...pump 157 Circulation pump 195 Circulation pump 155 Climate zone 122 Collector maximum temperature limit 198 Conditional priority 190 Constant temperature control 169 Cooling switch over 178 Cycle operation 125 D Delay enabling full load in cascade operation 237 Demand contact 221 Design temperature 122 District heating control 156 District heating valve 145 E Economy interval 195 Electrical heatin...

Page 259: ... 134 Hot water tank Loading 188 Hydraulic buffer relief 217 I Indirect return increase 162 224 L Legionella protection 189 Loading enabling 192 Loading pump extended running 193 M Menu Direct Heating Circuit 173 181 Mixed Heating Circuit 181 Mixed Heating Circuits 173 Minimum burner runtime 131 O OpenTherm 140 Operating mode 118 Operating states 40 Operation with NTC 20K room temperature sensor 23...

Page 260: ...esetting heat balancing 200 201 Switch off differential 198 Switch on differential 198 Tank maximum temperature limit 199 Solid fuel Function 214 Solid fuel Minimum temperature 214 Solid fuel Maximum temperature 215 Solid fuel Switch on differential 215 Solid fuel Switch off differential 215 Solid fuel Anti blocking protection of solid fuel pump 215 Summer switch off 123 Switching differential I 1...

Page 261: ......

Page 262: ...Rolle Z A La Pièce 16 Switzerland by its Authorized Representative Automation and Control Solutions Honeywell House Arlington Business Park Bracknell Berks RG12 1EB Phone 44 1344 656000 Fax 44 1344 656644 http honeywell com uk Printed in Germany All rights reserved Subject to change without notice EN2H 0221GE51 R0812 ...

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