Siemens QAA73.110, Basic Documentation

Page 1: ...Edition 1 2 Device series A CE1P2284en 10 07 2002 Siemens Building Technologies HVAC Products QAA73 110 Room Unit for Boiler Control with OpenTherm Interface Basic Documentation ...

Page 2: ...2 70 Siemens Building Technologies Basic Documentation QAA73 110 Room unit CE1P2284en HVAC Products 10 07 2002 ...

Page 3: ...ing 20 2 10 Operational faults 21 3 Description of enduser settings 22 User interface 22 3 1 Heating circuit operating modes 22 3 2 Operating mode of d h w heating 22 3 3 Occupancy button 23 3 4 Info button 23 Time of day 24 3 5 Time of day date and year 24 Setpoints 25 3 6 Nominal room temperature setpoint 25 3 7 Reduced room temperature setpoint 26 3 8 Frost protection setpoint of room temperatu...

Page 4: ...art control 46 4 20 Maximum forward shift for optimum stop control 46 D h w 47 4 21 Reduced setpoint of the d h w temperature 47 4 22 Release of d h w heating 47 4 23 Legionella function 48 4 24 D h w operating mode selector 49 4 25 Control of d h w circulating pump 49 General 49 4 26 Programming 49 4 27 Clock time master 51 4 28 Winter summertime changeover 51 4 29 Summer wintertime changeover 52...

Page 5: ... 6 1 2 Weather compensation with room influence 60 6 1 3 Room compensation 61 6 2 Automatic 24 hour heating limit 61 6 2 1 Without room influence 61 6 2 2 With room influence 62 6 3 Quick setback with room influence 63 6 4 D h w push 63 6 5 Frost protection 64 6 5 1 Frost protection for the building 64 6 5 2 Frost protection for the boiler and the d h w 64 7 Dimensions 65 8 Technical data 66 ...

Page 6: ... and thus acknowledged Yearly clock with automatic summer wintertime changeover One heating program per heating circuit with up to 3 heating periods per day can be selected on an individual basis D h w program with up to 3 heating periods per day can be selected on an individual basis Holiday program The heating programs and the d h w program can be reset to their default settings Programming lock...

Page 7: ... radiator convector underfloor and ceiling heating systems and radiant panels Especially suited for heating plants with pump heating circuits If the boiler control systems feature integrated mixing valve control it is also possible to control mixing heating circuits Primarily in connection with Heating boilers or small gas fired appliances or condensing boilers Heating boilers or instantaneous wat...

Page 8: ...iation or other heating or cooling sources Mounting height is about 1 5 meters above the floor The unit can be fitted to most commercially available recessed conduit boxes or directly on the wall 2 2 Installation Wall Boiler control panel with the help of clips The controller may not be exposed to dripping water Permissible ambient temperature 0 50 C Open the unit at the top and remove the base fr...

Page 9: ...d connect it to the screw teminals 2284Z34a Engage the housing front at the top of the base and close the unit to the bottom 2284Z35a Pull the bus cable through the opening of the base and connect it to the screw teminals 2284Z37 Engage the housing front at the top of the base and close the unit to the bottom 2284Z35a 3 step 4 step Mounting in a panel cut out 1 step 2 step ...

Page 10: ...t fit check the size of the cut out and the housing 2284Z15 Fit the clips usually 4 pieces to the rear of the housing They engage on the housing 2284Z38 The controller s mounting dimensions are 92 x 92 mm Due to the dimensions of the front however the standard spacing is 96 mm The mechanical mounting facility allows the controller to be fitted in front panels having a thickness of 1 to 3 mm 96 1 2...

Page 11: ...ucts Handling 10 07 2002 2 3 Electrical installation The local regulations for electrical installations must be complied with 1 3 4 5 6 2 2284Z40 1 2 3 4 5 6 COA COB OpenTherm terminal A interchangeable OpenTherm terminal B interchangeable 23 mA max Regulations for installation Connection diagram ...

Page 12: ...r for operating mode Display of data and operating mode Heating circuit operating mode button and associated symbols Operating mode changes to Automatic operation continuous operation Standby D h w operating mode button with associated symbol D h w heating ON OFF Line selection buttons up and down Selection of operating line Setting buttons plus and minus Setting the parameters Operating elements ...

Page 13: ...ivated if flame present 2c Fault service activated if fault present service due 3 Time pointer 4 Time of day 5 Heating circuit operating modes 6 D h w operating mode Display of operating level in this case Nominal 1 2284z04 1 Current operating level Display of measured value Outside temperature 1 2 2284z05 1 Parameter name 2 Parameter value Display of parameter Holidays start 1 2 3 2284z06 1 Param...

Page 14: ...er control Only then is the full functionality of the QAA73 110 ensured so that the most common applications can be fully covered If a parameter is not supported by boiler control the display shows 3 strokes in place of a value 2 6 Parameter settings for the enduser The following settings can be made to meet the individual needs of the enduser Buttons Explanation Line 1 PROG Press one of the 2 lin...

Page 15: ...6 00 22 Switch off time period 1 00 00 24 00 hh mm 10 min 22 00 23 Switch on time period 2 00 00 24 00 hh mm 10 min 24 Switch off time period 2 00 00 24 00 hh mm 10 min 25 Switch on time period 3 00 00 24 00 hh mm 10 min 26 Switch off time period 3 00 00 24 00 hh mm 10 min Time switch program 3 d h w 30 Preselecting the weekday Mo Su week week day 1 day 31 Switch on time period 1 00 00 24 00 hh mm...

Page 16: ...s This will take you to the programming level Heating engineer 51 3 PROG Press the line selection buttons to select the required line The parameter list on the next pages contains all available lines 51 98 4 Press the or button to set the required value The setting will be stored as soon as you leave the programming mode or change to another line The parameter list on the next pages contains all s...

Page 17: ...ating curve slope HC1 HC1 inactive 2 5 40 0 0 5 15 0 71 Minimum limitation of flow temperature HC1 TV1 min 8 TV1max C 1 8 72 Maximum limitation of flow temperature HC1 TV1max TV1min TKmax C 1 80 73 Parallel displacement of heating curve HC1 4 5 4 5 K 0 5 0 0 74 Type of building construction Heavy Light Light 75 Room influence None on HC1 on HC2 on HC1 HC2 on HC1 76 Switching differential of room t...

Page 18: ... Resolution Factory setting General 95 Programming lock Locked released Released 96 Clock time master QAA73 external QAA73 97 Summer time start 1 Jan 31 Dec dd mm 1 day 25 March 98 Summer time end 1 Jan 31 Dec dd mm 1 day 25 Oct These lines are only displayed in OpenTherm Plus mode Also the relevant functions must be supported by boiler control ...

Page 19: ... code If the combination of buttons is correct you reach the programming mode OEM è Wrong code If the code has been entered incorrectly the display will change to the Parameter settings for the heating engineer 4 PROG Press the line selection buttons to select the required line The parameter list on the next 2 pages contains all available lines 100 199 5 Press the or button to set the required val...

Page 20: ... 1 65 132 Dwelling time legionella function 0 360 min 10 0 133 Effect of legionella function on circulating pump No yes Yes Service functions OEM 150 Info display Temporary continuously Temporary 151 Frost warning inactive 10 10 C 0 5 3 0 152 Operation lock Locked released Released 153 Action occupancy button On HC1 HC2 on HK1 On HC1 HC2 199 Software version QAA73 0 99 9 1 These lines are only dis...

Page 21: ...the manual reset safety limit thermostat STB Check wiring and fuse of boiler control Check the communication link to boiler control The room temperature does not agree with the required temperature level Does the room temperature setpoint agree with the required temperature level Is the required operating mode indicated Are weekday time of day and the displayed heating program correct Info display...

Page 22: ...s not active Standby Heating circuits 1 and 2 are switched off Holiday function is not active Frost protection functions are active 3 2 Operating mode of d h w heating D h w heating can be switched on and off independent of the other operating modes D h w heating ON is indicated by a pointer under the d h w symbol No pointer OFF Complete pointer ON Half the pointer ON with ECO function è This oper...

Page 23: ...ominal to reduced or vice versa D h w The occupancy button has no effect on d h w heating Holiday program The occupancy button has no effect summer operation After automatic summer changeover the occupancy button has no effect 3 4 Info button The Info level can be accessed any time by pressing the Info button By repeatedly pressing the Info button the various data made available by the Info level ...

Page 24: ...he line selection buttons to select line 1 2 or 3 2 Press the buttons to set the current values Line Setting range Unit 1 2 3 00 00 23 59 1 Jan 31 Dec 2000 2094 Minute hour day month year Time of day date and year will be set to their current values These settings are important ensuring that the heating program the d h w program the holiday program and summer wintertime changeover of the room unit...

Page 25: ...ature setpoint setting ranges 5 Reduced room temperature setpoint 6 Frost protection setpoint of the room temperature Readjustment of the nominal setpoint with the knob can be locked via OEM parameter 152 Minimum and maximum limitation of the nominal setpoint setting range can be accomplished via OEM parameters 100 and 101 When the nominal room temperature setpoint is active the rooms will be heat...

Page 26: ...es the reduced room temperature setpoint is maintained Any lower nominal temperature is given priority however 3 8 Frost protection setpoint of room temperature TRF This function prevents the room temperature from falling below the adjusted frost protection setpoint 1 Press the line selection buttons to select line 6 2 Press the buttons to adjust the frost protection setpoint of the room temperatu...

Page 27: ...f d h w temperature setting on line 130 The temperature setpoint during normal d h w operation will be changed 0 10 20 30 40 50 60 70 80 90 100 120 130 140 C 2284Z17 90 7 130 7 Nominal d h w temperature setpoint 90 Reduced setpoint of the d h w temperature 130 Maximum nominal setpoint of d h w temperature D h w heating has 2 different setpoints that can be used Nominal setpoint of d h w temperatur...

Page 28: ...only if line 91 is set for use by the d h w time switch program 3 10 Preselecting the weekday With this setting you select the weekdays or the 7 day block for which the switching times of the time switch program apply 1 Press the line selection buttons to select line 10 or 20 or 30 2 Press the buttons to preselect the 7 day block or the individual day Setting range Unit Week Mo Su 7 day block Indi...

Page 29: ... and d h w heating The temperature setpoints of the 2 heating circuits and the d h w usage times change at the times set 1 Press the line selection buttons to select lines 11 through 16 for HC1 or lines 21 through 26 for HC2 or lines 31 through 36 for d h w 2 Press the buttons to set the switching time on each line Setting range Unit Factory setting 24 00 h min see standard time switch programs Fi...

Page 30: ...ay period the heating level will be reduced either to Reduced or Frost according to the parameter setting made on programming line 42 During the holidays d h w heating is locked On completion of the holiday period the current room unit settings apply again The dates of the start and the end of the holiday period will automatically be cleared when the holidays are over The entered holiday period is...

Page 31: ...display changes to Yes Display Unit No yes In that case the individual settings will be lost The time settings for the time switch programs will be overwritten with standard values This applies to the following settings Switching times of time switch programs 1 and 2 11 16 or 21 26 Switching times for d h w program 31 36 Switching point Setting line TSP1 or 2 d h w Standard time Switch on time per...

Page 32: ...espective periods of time will be shortened or extended The change will only affect the heating circuit Entry Increase Winter operation will start earlier Summer operation will start later Decrease Winter operation will start later Summer operation will start earlier To determine changeover the setting of the summer winter changeover temperature a fixed switching differential is compared with the ...

Page 33: ...layed is always the fault with the highest priority most severe fault If other faults are present at the same time the next fault with the highest priority will be displayed after the present fault has been corrected In the case of a room unit specific fault or a fault of Siemens boiler control the error code and appropriate error text will be displayed 2284z25 Example of own fault display In the ...

Page 34: ...en rectified Press the Info button to select Info line 3 If a status code is indicated the fault status code symbol flashes When pressing the Info button the relevant status code is displayed in clear text Display QAA73 110 Description of error None No service required Maintenance Boiler or burner service required Chimney sweep Chimney sweep function active Controller stop Controller stop function...

Page 35: ... outside temperature that affects the room temperature Consideration is given to the building s thermal storage capacity The attenuated outside temperature is generated by the room unit It is continually calculated based on the prevailing outside temperature Operating line 53 automatically displays the actual value C of the attenuated outside temperature No direct setting can be made The generatio...

Page 36: ...iable for flow temperature control Operating line 54 automatically displays the actual value C of the composite outside temperature No direct setting can be made Display Unit 50 50 C The composite outside temperature as a compensating variable acts on flow temperature control that is thus matched to the prevailing weather conditions It also acts on the 24 hour heating limit to shut down the heatin...

Page 37: ...ion buttons to select line 56 Display Unit 0 16 l min 4 6 Actual boiler return temperature The current boiler return temperature is displayed Press the line selection buttons to select line 57 Display Unit 40 127 C 4 7 Actual value of the flue gas temperature The current flue gas temperature is displayed Press the line selection buttons to select line 58 Display Unit 40 500 C 4 8 Actual value of s...

Page 38: ...vers only one signal to the boiler control for controlling the heat output In the event of fault boiler control signals Boiler Lock Out Fault to the QAA73 110 Press the line selection buttons to select line 62 Display Unit Lite Plus Directly after connection of OpenTherm the QAA73 110 ascertains whether boiler control supports the OpenTherm Plus or the OpenTherm Lite protocol The protocol currentl...

Page 39: ...increased or decreased with the following effects Increase The flow temperature will be raised when the outside temperature drops Decrease The flow temperature will be raised less when the outside temperature drops The following settings produce the following effects 2 5 40 0 The room unit delivers a weather compensated flow temperature for the respective heating circuit The relevant heating circu...

Page 40: ...x C 8 82 TV2min TKmax C 80 TKmax Maximum boiler temperature TV1max Maximum limitation of flow temperature HC1 TV1min Minimum limitation of flow temperature HC1 TV2max Maximum limitation of flow temperature HC2 TV2min Minimum limitation of flow temperature HC2 0 10 20 30 40 50 60 70 80 90 100 TV max min akt C 2284Z21 TVw 71 81 72 82 TVw Current flow temperature setpoint 71 minimum limitation of flo...

Page 41: ...red all room temperature setpoints will be appropriately raised or lowered This allows the room temperature setpoints to be matched to the effective room temperatures If a nominal room temperature setpoint of 20 C adjusted on the room unit always produces a room temperature of 22 C independent of the prevailing outside temperature the heating curve should be displaced downward by 2 C Each setpoint...

Page 42: ...e variations Light Light building structures The room temperature will respond quicker to outside temperature variations Heavy building structures Buildings with thick walls or with external insulation Light building structures Buildings with a light envelope 4 16 Room influence Owing to the temperature checkback signal received from the room a constant room temperature is maintained and if requir...

Page 43: ...ected to boiler control Room influence must be enabled to act on the relevant heating circuits There may be no thermostatic radiator valves in the reference room If such valves are present they must be set to their fully open position 4 17 Switching differential of the room temperature It is used for room temperature limitation This function is recommended for pump heating circuits and prevents th...

Page 44: ...he heating curve takes place automatically which means that it need not be adjusted manually 1 Press the line selection buttons to select line 77 1 Press the buttons to select the type of heating curve adaption Setting range Unit Factory setting Inactive active Active The setting will switch automatic adaption of the heating curve on or off Entry Inactive No adaption The heating curve settings are...

Page 45: ...t of the heating curve Simple adaption range At attenuated outside temperatures below 4 C it is only the slope of the heating curve that is adapted In this temperature range the readjustment is weighted with factor f2 and adaption sensitivity 2 Combined adaption range At attenuated outside temperatures of between 4 and 12 C it is partly the slope and partly the parallel displacement that are adapt...

Page 46: ...Optimization calculates the changeover time such that at the start of occupancy the room temperature will have reached the nominal setpoint The switch on point for the heating system change to the nominal temperature level is selected such that at the start of occupancy according to the heating program the room temperature reached will be the setpoint minus 0 25 K Optimum start control only acts o...

Page 47: ...select line 90 2 Press the buttons to adjust the reduced setpoint of the d h w temperature Setting range Unit Factory setting 8 TBWw C 40 TBWw Nominal d h w temperature setpoint The temperature setpoint during reduced d h w operation will be changed 0 10 20 30 40 50 60 70 80 90 100 120 130 140 C 2284Z23 90 130 7 7 Nominal d h w temperature setpoint 90 Reduced setpoint of the d h w temperature 130 ...

Page 48: ...ella function ensures that the d h w in the storage tank will periodically be raised to a temperature of at least 60 C thus making certain that potential legionella viruses will be killed When using d h w systems with instantaneous heaters this function may not be activated 1 Press the line selection buttons to select line 92 2 Press the buttons to activate or deactivate the legionella function Se...

Page 49: ...nge Unit Factory setting Release of d h w Prog 2 D h w program Release of d h w according to d h w release The d h w circulating pump is activated and deactivated according to the d h w release selected on line 91 During that period of time the circulating pump operates continuously without giving consideration to actual d h w heating Prog 3 according to time switch program 3 The d h w circulating...

Page 50: ...ymbol in place of the value On the programming or parameter setting level locked programming can temporarily be deactivated To do this the down button and the button must be pressed simultaneously for at least 3 seconds This temporary cancellation of the programming lock is maintained until the next change to the Info level is made To have programming continuously released the down button and the ...

Page 51: ... periodically every 5 minutes from the boiler control In that case the time of day cannot be readjusted on the QAA73 110 4 28 Winter summertime changeover This function enables the yearly clock to automatically switch to wintertime 1 Press the line selection buttons to select line 97 2 Press the buttons to set the date of changeover Setting range Unit Factory setting 1 Jan 31 Dec dd mm 25 March On...

Page 52: ...les the yearly clock to automatically switch to wintertime 1 Press the line selection buttons to select line 98 2 Press the buttons to set the date of changeover Setting range Unit Factory setting 1 Jan 31 Dec dd mm 25 Oct On the Sunday following the set date the time of day of the room unit will switch to wintertime For that purpose the time of day is shifted backward by one hour Description Line...

Page 53: ... 2 Gain factor of room influence KORR Defines the influence of room temperature setpoint deviations on the controlled system The room influence can be activated and deactivated operating line 75 1 Press the line selection buttons to select line 102 2 Press the buttons to set the gain factor Setting range Unit Factory setting 0 20 4 Changing this setting has the following impact Increase Authority ...

Page 54: ...stems with no room influence 1 Press the line selection buttons to select line 103 2 Press the buttons to set the constant Setting range Unit Factory setting 0 20 2 The duration of quick setback will be changed Entry Increase Setback time will become longer For well insulated buildings that cool down slowly Decrease Setback time will become shorter For poorly insulated buildings that cool down rat...

Page 55: ...election buttons to select line 104 2 Press the buttons to adjust the room temperature setpoint boost Setting range Unit Factory setting 0 20 C K 5 The duration of boost heating will be changed Entry Increase More setpoint boost Heating up time will become shorter Decrease Less setpoint boost Heating up time will become longer Boost heating is started as soon as switching to a higher room temperat...

Page 56: ...will be more accurate 1 Press the line selection buttons to select line 106 2 Press the buttons to select the required correction of the sensor characteristic Setting range Unit Factory setting 3 3 ºC 0 The sensor characteristic is displaced parallel by the selected value When entering a negative value the temperature measured will be lowered by that value when entering a positive value it will be...

Page 57: ...ne 92 is maintained for at least the period of time set here Setting range Unit Factory setting 0 360 min 0 The dwelling time starts as soon as the legionella setpoint is reached During the entire dwelling time the temperature may not fall below the legionella setpoint by more than the set BMU d h w switching differential standard setting LMU The legionella function is terminated when this criteri...

Page 58: ...vel is displayed for only 8 minutes After that period of time the display will return to the standard display actual room temperature time of day and time pointer Continuously The information selected last with the Info button will be continuously displayed 5 12 Frost warning A frost warning can be generated depending on a selectable outside temperature 1 Press the line selection buttons to select...

Page 59: ... it can apply to both heating circuits 1 Press the line selection buttons to select line 153 2 Press the buttons to select the required function Setting range Unit Factory setting On HC1 HC2 on HC1 On HC1 HC 2 When pressing the occupancy button in automatic or continuous operation either both heating circuits or only heating circuit 1 is acted upon 5 15 Software version The software version instal...

Page 60: ...low temperature The colder the weather the quicker the building cools down and the greater the heating circuit s heat demand With this type of compensation it must be ensured that the heating curve is correctly set because the room unit gets no feedback from the space whether the amount of heat supplied meets the demand of the users The room influence line 75 must be set to None and in addition an...

Page 61: ...rt of PID control keeps the room temperature at the required level 6 2 Automatic 24 hour heating limit This is a fast acting savings function since the heating is switched off when there is no more demand for heat Economical operation is ensured throughout the year since manual switching off is no longer required especially during intermediate seasons The automatic 24 hour heating limit does not f...

Page 62: ... flow temperature setpoint and of the current room temperature setpoint If the flow temperature setpoint corrected by the room influence falls below the room temperature setpoint plus a correction value the heating will be switched off Heating s switch off point 16 KORR 10 S 2 TRw TVwk If the flow temperature setpoint corrected by the room influence exceeds the room temperature setpoint plus a cor...

Page 63: ...g circuit pump will be switched off until the quick setback process is terminated This means that the room temperature falls quicker since the supply of heat from the flow or boiler is cut off If no room influence is selected quick setback will be provided not by this process but according to the quick setback function 103 6 4 D h w push Availability of d h w is also ensured during non occupancy t...

Page 64: ...tection functions prevent plant and room temperatures from falling below a certain level thus protecting the heating plant and the rooms from freezing 6 5 1 Frost protection for the building The room unit s frost protection function ensures that the room temperature will not fall below the selected frost protection value as long as the heating plant operates 6 5 2 Frost protection for the boiler a...

Page 65: ...Siemens Building Technologies Basic Documentation QAA73 110 Room unit CE1P2284en HVAC Products Dimensions 10 07 2002 7 Dimensions 2284M02 96 96 91 47 96 1 2 92 0 8 0 92 0 8 0 2284M01 96 Room unit Panel cutout ...

Page 66: ...ion environment to EN 60730 Operation IEC 721 3 3 class 3K 5 Temperatures 0 0 50 C Humidity 85 r h Transport IEC 721 3 2 class 2K 3 Temperatures 25 70 C Humidity 95 r h Storage IEC 721 3 1 class 1K 3 Temperatures 25 70 C Humidity 95 r h conformity EMC directive 89 336 EEC Immunity EN 50 082 1 EN 50 082 2 Emissions EN 50 081 1 EN 50 081 2 Low voltage directive 73 23 EEC Electrical safety EN 60 730 ...

Page 67: ... faults 33 info button 23 info display 58 L language 33 legionella function 48 dwelling time 57 effect on circulating pump 57 light building structures 42 limitation of rate of increase of flow temperature setpoint 56 M maximum d h w setpoint TBWmax 56 maximum forward shift for optimum start control 46 maximum forward shift for optimum stop control 46 maximum limitation of setpoint rise 60 maximum...

Page 68: ...ummer operation 32 switching differential of the room temperature 43 switching times 29 T technical data 66 time of day date and year 24 time switch program for space heating 28 type of building construction 42 W weather compensation 60 weather compensation with room influence 60 winter summertime 51 winter operation 32 ...

Page 69: ...ged 20 Setting lines 132 133 added Setting line 152 Function text changed 23 Info button line 3 changed 28 Description changed 29 Entry of individual days HC2 to TSP changed Chapter Switching times HC2 to TSP changed 31 Block Effect and standard values Changed to TSP 34 Title Maintenance indication changed to Boiler status code Table Boiler changed to maintenance lines Floor curing and modem added...

Page 70: ... QAA73 110 Room unit CE1P2284en Landis Staefa Division 10 07 2002 Siemens Building Technologies AG HVAC Products Gubelstrasse 22 CH 6301 Zug Tel 41 41 724 24 24 Fax 41 41 724 35 22 www landisstaefa com Siemens Building Technologies AG Subject to alteration ...