Rotex Controller Series Product Documentation
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Rotex Controller Series Product Documentation

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Product documentation THETA NORM/UNIT
Product documentation
Controller series THETA
NORM, UNIT, RS and RFF types
Standing: Software version 2.3

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Summary of Contents for Rotex Controller Series

  • Page 1 Product documentation THETA NORM/UNIT Product documentation Controller series THETA NORM, UNIT, RS and RFF types Standing: Software version 2.3...

  • Page 3: Table Of Contents

    Product documentation THETA NORM/UNIT Softwareversion ..................... 1-1 General safety instructions ..................2-1 Application ....................2-1 Conditions for start-up .................. 2-1 Safety measures for EMC - conform installation .......... 2-2 Cable dimensions and maximum cable length ..........2-3 Maximum cable lengths ................2-4 Grounding and neutralizing ................
  • Page 4 Product documentation THETA NORM/UNIT 5.6.1 HYDRAULIC Level ................5-40 5.6.2 SYSTEM level ..................5-42 5.6.3 DOMESTIC HOT WATER (Type ..B..) Level ........5-43 5.6.4 Selection levels unmixed circuit / mixed circuit 1 / mixed circuit 2 ..5-44 5.6.5 Heat generator level (..2..) ..............5-45 5.6.6 Raising Return Temperature Level ............
  • Page 5 Product documentation THETA NORM/UNIT 8.1.8.4 Modulation running time ..............8-8 8.1.8.5 Modulation starting time ..............8-9 8.1.8.6 Modulation starting load ..............8-9 8.1.9 Control of communicating heat generators (H-GEN type 5) ....8-10 8.1.10 Flue Gas Temperature Monitoring ............8-10 8.1.11 Charging pump (CHP) .................
  • Page 6 Product documentation THETA NORM/UNIT Function Buffer Loading Pump (..VV..) ............8-43 Solid Fuel Loading Pump (SFP) ..............8-51 Tank charge changeover ................8-53 Heat forced dissipation valve ..............8-54 Hydraulic buffer release (HBR) (..VV..) ............8-55 8.10 Heating Circuit Constant Temperature Control (..2.. or ..3..) ...... 8-56 8.11 Fixed Value Control (..2..
  • Page 7 Product documentation THETA NORM/UNIT 11.5 Sensor Calibration ..................11-7 12 Mounting ......................12-1 12.1 Mounting instructions for NORM type ............12-1 12.1.1 Electrical installation ................12-1 12.1.2 Electrical installation ................12-2 12.2 Mounting instructions for UNIT type ............12-3 12.2.1 Mounting UNIT ..................12-3 12.2.2 Electrical installation ................
  • Page 8 Product documentation THETA NORM/UNIT...

  • Page 9: Softwareversion

    Product documentation THETA NORM/UNIT Softwareversion Please use this documentation in conjunction with softwareversion V 2.3 of your controller. The version will be displayed for about 8 s when the controller is connected to the mains. If you are using an older version, please contact your heating specialist.
  • Page 10 Product documentation THETA NORM/UNIT...

  • Page 11: General Safety Instructions

    Product documentation THETA NORM/UNIT General safety instructions Application The controller family THETA is designed exclusively for the control of warm water heating and district heating systems including domestic hot water control. These systems should not exceed a flow temperature of 120 °C. Conditions for start-up CAUTION The heating installation must be completed and filled with water in order to prevent...

  • Page 12: Safety Measures For Emc - Conform Installation

    Product documentation THETA NORM/UNIT Safety measures for EMC - conform installation • Cables with mains voltage must generally be installed separately from sensor and data bus cables. In this case a minimum distance of 2 cm between the cables must be observed. Crossing of lines is permitted.

  • Page 13: Cable Dimensions And Maximum Cable Length

    Product documentation THETA NORM/UNIT • All data bus cables must be carried out in shielded version. Suggested version, see technical specifications on page 14-1 • The shielding of the cable has to be connected with earth potential to one side, i.e. boiler covering, connecting terminals for earth potential etc.

  • Page 14: Maximum Cable Lengths

    Product documentation THETA NORM/UNIT Maximum cable lengths Sensor, selector and analogue inputs • A maximum cable length of 100 m is recommended. Longer cables are possible but increase the risk of interferences. Relay outputs • Unlimited cable length. Bus lines •...

  • Page 15: Connecting Accessories

    Product documentation THETA NORM/UNIT Connecting accessories WARNING According to VDE 0730 the power supply for the controller must have a separate main switch for life and neutral. Please observe local guidelines for grounding and neutralizing! As soon as there is power supply at the terminals 21, 22, 2, 6, 12 and 18 also the terminal rows X3 and X4 will carry 230 V connections! If a manual switch function is desired for pumps, even though the DHW charging pump does not have on/off switches, external switches must be installed.
  • Page 16 Product documentation THETA NORM/UNIT...

  • Page 17: Overview

    Product documentation THETA NORM/UNIT Overview If the described function is practicable in combination with the controller type, can be seen in the type key. The description refers to this key. Example: In the description, it says: "(Type ..VV..)". This means that this function is implemented in controller types that have the designation "VV"...
  • Page 18 Product documentation THETA NORM/UNIT...

  • Page 19: List Of Abbreviations

    Product documentation THETA NORM/UNIT List of abbreviations Boiler circuit pump OS 2 Outdoor sensor 2 BOSF Boiler sensor (solid fuel) Outside temperature Buffer sensor (top) Time program BU 2 Buffer sensor 2 (bottom) Time program BULP Buffer charging pump Time program BURN1 Burner stage 1 Parallel H-GEN clearance...
  • Page 20 Product documentation THETA NORM/UNIT...

  • Page 21: Operation

    Product documentation THETA NORM/UNIT Operation User interface Display and operating instruments 1 – Key for emission measurement and manual operation 2 – "Operating mode" key for all heating and set back modes 3 – "Heating curve" key 4 – "Information" key for the display of temperatures and operating modes 5 –...

  • Page 22: Operating Elements

    Product documentation THETA NORM/UNIT In the automatic mode the basic display shows the weekday, the date, the time and the heat generator temperature. Depending on the set operating mode (automatic, party etc.), other information will be displayed in the basic display. In the operation mode "Holiday", the note HOLIDAY TIL is displayed instead of the date and the return date is displayed instead of the temperature.

  • Page 23: Night-Time Room Temperature" Key

    Product documentation THETA NORM/UNIT 5.1.2.3 "Night-time Room Temperature" Key This key sets the reduced room temperature setpoint in the AUTOMATIC MODE ¦ between the heating cycles as well as during the ABSENT and RED.HEATING operating modes. In control mode 1 the set point is identical for all the heating circuits. In control mode 2 the setpoint is individual for the circuits concerned.

  • Page 24: Operating Mode" Key (Basic Display)

    Product documentation THETA NORM/UNIT Setting: Press the § key Set the flashing specified domestic hot water temperature by turning the 50. 0 rotary pushbutton î to the desired value. Confirm the set value by pressing either the § key or the rotary pushbutton î.
  • Page 25 Product documentation THETA NORM/UNIT Overview of the Operating Modes Arrow on the Operating mode Basic Display Individual setting Symbol Summer P1(2,3) ê SUMMER 58. 5 19. 2 7 Heating ë HEATING 58. 5 19. 2 7 Red. heating ì RED. H EATING 58.
  • Page 26 Product documentation THETA NORM/UNIT Control during the holiday mode If outdoor temperatures are below the frost limit (see menu "System- parameter - Parameter 5 = plant frost protection"), the heating circuits without wall modules are controlled according to a reduced specified room temperature of 3 °C. with wall modules are controlled according to their individual frost protection limit of the heating circuit (see menu "Unmixed- or mixed circuit -Parameter 8 = Room frost protection limit") of...
  • Page 27 Product documentation THETA NORM/UNIT Setting range P1(P2, P3) / 0.5 ... 24 h from the current time P1 (P2, P3) Program-controlled restart of the heating operation. After activating the absent mode the heating mode is interrupted until the next switch-on time of the current automatic program P1 (as well as P2 or P3 if enabled).
  • Page 28 Product documentation THETA NORM/UNIT 5.1.2.5.4 Automatic mode In automatic mode, a maximum of 3 automatic time programs with various heating FR. 21. S EP. 0 1 times are available. The standard time programs P1, P2 or P3 set at the factory can be overwritten if necessary with one’s own switching times in the time program level 58.
  • Page 29 Product documentation THETA NORM/UNIT 5.1.2.5.5 Manual Summer Mode (only DHW mode) In this program only the domestic hot water circuit remains active and the DHW SUMMER1 temperature is controlled according to the DHW setpoint and the DHW time program. The heating operation is interrupted and frost protected. 58.
  • Page 30 Product documentation THETA NORM/UNIT 5.1.2.5.7 Constant reduced mode The operating mode RED.HEATING provides for a constant reduced heating mode RED. H EATING according to the specified reduced room temperature corresponding to the ECO (frost protected switch-off mode) or ABS (reduced mode) reduced operating mode 40.

  • Page 31: Heating Curve" Key

    Product documentation THETA NORM/UNIT 5.1.2.6 "Heating curve" key Determines the heating curve for the heating circuits (diagram, see detailed £ description in chapter "Controller functions") The slope of the heating characteristic describes the relation between the change in the flow temperature and the change in the outside temperature. In case of large heating surfaces (and therefore low flow temperatures) like floor heating systems, the heating characteristic curve is less steep compared to smaller heating surfaces (e.
  • Page 32 Product documentation THETA NORM/UNIT 5.1.2.7.1 Temperature displays The following information appear only under the indicated display conditions. Some displays are not available and are skipped according to the respective type of control. INFORMATION Displayed value Remarks Application Outdoor temp. (1) Average value / Outside sensor connected current value...
  • Page 33 Product documentation THETA NORM/UNIT INFORMATION Displayed value Remarks Application Ambient temper. Nominal/actual value Remote control necessary (..33..) Mixing circuit 2 Thermostat function THERMOSTAT Room thermostat function (..2..) Unmixed heating circuit activated OFF = no room temperature limit Thermostat function THERMOSTAT Room thermostat function (..3..) Mixing circuit 1...
  • Page 34 Product documentation THETA NORM/UNIT Information Display Function Application (Example) Status heat gener. HEAT GENER. Switching state of heat generator (..2..) stage 1 Single stage or stage 1 (2-stage) Status heat gener. HEAT GENER. Switching state of heat generator (..22..) stage 2 ST-2 Stage 2 Status modulating...

  • Page 35: Emission Measurement / Manual Mode" Key

    Product documentation THETA NORM/UNIT Automatic return If the "information key" ¤ is pressed for approx. 3 s upon accessing the information INFO TIME level, the INFO TIME parameter appears. This parameter determines the time for the automatic return to the standard display. Factory preset: Setting range OFF, 1...10 min...
  • Page 36 Product documentation THETA NORM/UNIT 5.1.2.8.2 Manual mode Function: ¡ If the key is pressed for more than 5 s while the standard display is on, the controller is switched to manual mode. In this operating mode the heat generator temperature is set manually with the rotary pushbutton according to the desired setpoint (does not MANUAL have any effect if operated as extension of heating circuits).

  • Page 37: Code-Input

    Product documentation THETA NORM/UNIT Code-Input 5.2.1 Installer code and OEM code • After entering the specialist code the parameters which are certain for the heating specialist are released and can be processed according to the heating plant design. • To enter the specialist code the buttons ¥ and § have to be pressed simultaneously for approx. 3 seconds until the request to enter the code is displayed.

  • Page 38: Automatic Exit Time

    Product documentation THETA NORM/UNIT 5.2.3 Automatic exit time When work with the control unit has finished, the unit automatically returns to the standard display after a factory-set time of 2 minutes. The exit time can be changed by setting a system parameter (see Page 5-42). The exit time applies to keys ¢, £, ¥, ¦...

  • Page 39: Automatic Return Time

    Product documentation THETA NORM/UNIT Automatic return time When work with the control unit has finished, the unit automatically returns to the standard display after a factory-set time of 2 minutes. The return time can be changed by setting a system parameter. The return time applies to keys ¢, £, ¥, ¦...

  • Page 40: Menu Selection Level

    Product documentation THETA NORM/UNIT Menu selection level The controller has a parameter menu which varies according to the different controller types. Entry into the Parameter Menu Level To enter the menu, the rotary pushbutton is to be pressed for approx. 3 s. The parameter menu always starts with the time programs menu;...

  • Page 41: Level And Parameter Overview

    Product documentation THETA NORM/UNIT 5.4.1 Level and Parameter overview Programming Configuration Parameterization (Heating circuits, controlled systems) Hydraulic DHW economy Reduced Reduced Reduced Time (h/min) Language H-GEN type diagram temperature Operational mode Operational mode Operational mode Enable time Legion.prot. Heating system Heating system Heating system Start-up...
  • Page 42 Product documentation THETA NORM/UNIT Parameterization Communicat Service Return temp. Switch-on differ. Minimum temp. Minimum temp. Switching Bus address Malfunction Heat generator setpoint collector-buffer limit limit differential Basic unit message #1 Switch-off diff. Switch-off diff. Maximum Maximum Switch-on Bus access pump Malfunction Outdoor pump...

  • Page 43: Time - Date" Menu

    Product documentation THETA NORM/UNIT 5.4.2 "Time - Date" Menu The following current daytime values can be set in this menu: - Time - Year - Date - Daylight-savings time (summer-winter time) All the listed values are preset at the factory and do not usually need to be updated. If corrections are necessary in exceptional cases, the values can be adjusted to the current conditions.

  • Page 44: Time Program" Menu

    Product documentation THETA NORM/UNIT 5.4.3 "Time program" menu In this menu the time programs can be set individually for the heating and DHW modes. The P1 standard program set at the factory (also P2 and P3, if enabled) for each heating or DHW circuit can be overwritten with individual switching times and temperature values.

  • Page 45: Programming Time Programs And Cycle Temperatures

    Product documentation THETA NORM/UNIT 5.4.3.4 Programming Time Programs and Cycle Temperatures 5.4.3.4.1 Switch-on time The switch-on time defines the start of heating or the occupancy start time if the optimization is enabled. After selecting the weekday and the corresponding cycle the relevant switch-on time starts to flash on the display and can be set with the rotary pushbutton.
  • Page 46 Product documentation THETA NORM/UNIT 5.4.3.4.3 Cycle temperature After confirming the switch-off time the relevant cycle temperature starts to flash on the display and can be set using the rotary pushbutton. In the case of heating circuits the displayed cycle temperature always refers to the desired room temperature, while in the case of the DHW circuit it refers to the desired water heater normal temperature in the selected cycle.
  • Page 47 Product documentation THETA NORM/UNIT Time program programming (Program P2 and P3 disabled) After entry into the level selection, the time program is always displayed first. Enabling programs P2 and P3 in level - SYSTEM (Page 5-42) - (see level selection Page 5-20) STANDARD DISPLAY Level - SELECTION...
  • Page 48 Product documentation THETA NORM/UNIT Time program programming (Program P2 and P3 enabled) After entry into the level selection, the time program is always displayed first. Enabling programs P2 and P3 in level - SYSTEM (Page 5-42) - (see level selection Page 5-20) STANDARD DISPLAY Level - SELECTION...
  • Page 49 Product documentation THETA NORM/UNIT Block-programming The copy function makes it possible to copy a source day to the desired target day or to all weekdays (week programming). All the cycles of the source day are copied. Single heating cycles cannot be copied. STANDARD DISPLAY Level - SELECTION...
  • Page 50 Product documentation THETA NORM/UNIT Copying complete programs NOTE: Heating circuits cannot be copied to DHW circuits, as these have different cycle temperatures: if a heating circuit is selected as a source circuit, the DHW circuit can no longer be used as a target circuit. STANDARD DISPLAY Level - SELECTION...
  • Page 51 Product documentation THETA NORM/UNIT Reloading Standard Programs Time programs P2 and P3 disabled: STANDARD DISPLAY Level - SELECTION Push for approx. 3 seconds UNMIXED TIME- SYSTEM- TIME PROGRAMS CALENDER CIRCUIT PARAMETER etc. press MIXED CIRCUIT UNMIXED MIXED CIRCUIT COPY STANDARD ð...

  • Page 52: System Level (Parameter)

    Product documentation THETA NORM/UNIT 5.4.4 SYSTEM level (Parameter) The parameters in this level refer to the general set values and limiting parameters in the heating system to be used. 5.4.4.1 LANGUAGE Factory preset: GERMAN Setting range: GERMAN, ENGLISH, FRENCH, ITALIAN Function: Several languages can be chosen for all the information appearing on the display.

  • Page 53: Control Mode

    Product documentation THETA NORM/UNIT 5.4.4.3 Control mode Factory preset: Setting range 1, 2 This parameter determines the control mode and has effects on the: - Operating mode selected with the operating mode key ¢ - Daytime temperature selected with the "daytime temperature" key ¥ - Nighttime temperature selected with the "night-time temperature"...
  • Page 54 Product documentation THETA NORM/UNIT 5.4.4.3.2 Separate Control Mode Nighttime Temperature Function: ¦ In this operating mode, the relevant setpoint applies only to the selected HC (= unmixed circuit), MC 1 (= mixed circuit 1) or MC 2 (= mixed circuit 2) Setting: •...

  • Page 55: Summer Switch-Off

    Product documentation THETA NORM/UNIT 5.4.4.4 Summer switch-off Factory preset: 20°C Setting range OFF, 10...30°C NOTE This function is only effective in operating mode automatic. Function: This parameter determines the end of the heating season based on the outside temperature. When the summer switch-off mode is active, it is indicated on the basic display by a sunshade symbol.

  • Page 56: Legionella Protection Day

    Product documentation THETA NORM/UNIT 5.4.5.2 Legionella protection day Factory preset: Setting range: OFF, MO...SU, ALL Setting values: OFF: The legionella protection function is not active. MO...SU: The legionella protection is activated on the selected weekday at the Llegionella protection time set by the heating specialist with a different parameter.

  • Page 57: Reduced Mode

    Product documentation THETA NORM/UNIT 5.4.6.1 Reduced Mode Access code: No access restriction Factory preset: Setting range ECO, RED Function: During reduced mode you can choose between two operating modes: Setting values: reduced mode The direct heating circuit’s heating circuit pump remains active during reduced mode (see Switching Time Program).

  • Page 58: Heating System

    Product documentation THETA NORM/UNIT 5.4.6.2 Heating system Access code: No access restriction Factory setting: 1.30 (Radiator systems) for direct circuit 1.10 (Floor heating systems) for mixed circuits Setting range: 1.00...10.00 Function: This parameter refers to the type of heating system (floor, radiator, convector heating) and can be compared to the exponent of the relevant heat exchanger.

  • Page 59: Malfunction Messages

    Product documentation THETA NORM/UNIT Malfunction messages The controller has an extensive built-in malfunction reporting logic, which displays the type of malfunction according to its priority. The malfunction messages alternate with the standard display as they appear. Several malfunctions occurring at the same time will appear one after the other in the temporal order in which they occur. The heating technician is to be informed of any error message.

  • Page 60: Parameter Settings

    Product documentation THETA NORM/UNIT Parameter Settings 5.6.1 HYDRAULIC Level Parameter Designation Setting range / Setting values Hydraulic diagram 0000, ..9999 No function DHW charging pump output DHW charging pump 8-34 (Type ..B..) DHW circulation pump 8-39 DHW electrical heating element 8-40 No function Direct circuit (outdoor temp.
  • Page 61 Product documentation THETA NORM/UNIT Parameter Designation Setting range / Setting values Setting range and assignment see parameter 08 Variable input 2 (..VV..) without parameter 16 (flue gas sensor) Variable input 3 Setting range and assignment see parameter 08 (.. VV..) without parameter 16 (flue gas sensor) Indirect raising of return OFF, ON (only Type ..3.., ..33..)

  • Page 62: System Level

    Product documentation THETA NORM/UNIT 5.6.2 SYSTEM level Parameter Designation Setting range / Setting values German English LANGUAGE Language selection 5-32 French Italian Only one time program TIME Number of enabled time enabled 5-32 PROGRAM programs P1-P3 Three time programs enabled Common setting for all Enabling of separate control CONTROL...
  • Page 63 Product documentation THETA NORM/UNIT 5.6.3 DOMESTIC HOT WATER (Type ..B..) Level Parameter Designation Setting range / Setting values Hot water economy DHW NIGHT 10 °C ... Hot water temperature 40 °C 8-34 temperature No legionella protection Mo...SuLegionella protection on the specified LEGION.PROT.

  • Page 64: Selection Levels Unmixed Circuit / Mixed Circuit 1 / Mixed Circuit 2

    Product documentation THETA NORM/UNIT 5.6.4 Selection levels unmixed circuit / mixed circuit 1 / mixed circuit 2 Parameter Designation Setting range / Setting values - Switch-off mode (frost protection) RED.HEATING Type of reduced mode 8-21 - Reduced mode HEAT. =1,30 Heating system (exponent) 1,00 ...

  • Page 65: Heat Generator Level

    Product documentation THETA NORM/UNIT 5.6.5 Heat generator level (..2..) Parameter Designation Setting range / Setting values without heat generator Oil/Gas 1 stage (..2..) Oil/Gas 2 stage (..22..) Heat generator type Oil/Gas 2 x 1 stage (..22..) variable burner High efficiency condensing boilers (..C../..OT..) no start-up protection Start-up protection on minim.

  • Page 66: Raising Return Temperature Level

    Product documentation THETA NORM/UNIT Parameter Designation Setting range / Setting values Basic load parallel shift (only when used in cascade 0…60 K 10 K 10-3 mode) 5 °C...BT (only if start up release is separated- Heat circuits minimum 27** 36 °C temperature limit Parameter 02 = 3) Switching difference...

  • Page 67: Solid Fuel Level

    Product documentation THETA NORM/UNIT Parameter Designation Setting range / Setting values Priority mode Parallel mode Priority mode DHW (nominal value- Solar operating mode 8-40 control) Priority mode buffer (nominal value control) OFF, 0.5 … 24 h Inhibition heat generator 8-40 (Only in priority mode - Parameter 6 = 1) OFF, 1…30 K Sol.

  • Page 68: Cascade Control Level

    Product documentation THETA NORM/UNIT Parameter Designation Setting range / Setting values Drain function Switch-on (Switch-off differential + 2 K) ... 30 K 10 K 8-43 differential Drain function Switch-off 1 K ... (Switch-on differential -2 K) 8-43 differential no start-up protection Buffer start-up protection 8-43 Start-up protection active...

  • Page 69: Relay Test Level

    Product documentation THETA NORM/UNIT 5.6.12 RELAY TEST Level Parameter Designation Setting range / Setting values Different relay sequence according to type of boiler Heat generator test 11-3 (one or tow level) Direct heating circuit pump OFF-ON-OFF -... 11-3 test Mixing circuit pump 1 test OFF-ON-OFF -...
  • Page 70 Product documentation THETA NORM/UNIT 5-50...

  • Page 71: General Functions

    Product documentation THETA NORM/UNIT General functions Starting up During the first switch-on of the control unit or at return of voltage after power failure all available display segments will appear temporarily: The desired language (D, GB, F, I) can be selected. LANGUAGE The display only appears on the day of commissioning.

  • Page 72: Controller Configuration

    Product documentation THETA NORM/UNIT Controller configuration 6.2.1 Complete reset To reset all settings, the device can be reset completely. ¢, ¥, ¦ § Press the keys simultaneously until the controller boots again. 6.2.2 Basic settings and parameter preselection CAUTION The setting options deacribed below affect the operation. After the adaptation, the end user must be informed about the changed operation.

  • Page 73: Eanbling Separate Operating Modes And Temperature Changes

    Product documentation THETA NORM/UNIT 6.2.2.3 Eanbling separate operating modes and temperature changes Description: In order to make the operation as easy as possible for most of the applications, a common control mode is set for all heating circuits when supplied. For those rare cases in which separate control modes are necessary (e.

  • Page 74: Variable Adaptation Of Hydraulic Parameters (Variable Inputs And Outputs)

    Product documentation THETA NORM/UNIT 6.2.2.5 Variable adaptation of hydraulic parameters (variable inputs and outputs) The hydraulic settings preselected via the parameter hydraulic selection for the variable inputs and outputs can be adapted individually. To this end, the preselected hydraulic parameters can be changed individually. This enables hydraulics, which are not covered by the automatic factory settings, to be realized.
  • Page 75 Product documentation THETA NORM/UNIT Connections and settings table: Function Adjustable at Inputs Notes output Assigned Optional (VI1/2) permanently DHW charging SOL-P DHWS Fixed sensor input Direct heating circuit, HC, MC1, MC2 weather controlled Mixed circuit, weather MC1, MC2 VF1, VF2 Fixed sensor input for corresponding controlled mixed circuit...

  • Page 76: Temperature Display In Fahrenheit

    Controller type code Function: The controller series THETA offers the option of reducing the scope of service of the supplied device. The scope of service set in the factory is based on the controller type (see overview on page 1).
  • Page 77 Product documentation THETA NORM/UNIT Meaning Type Device type code 233B 223B 2233B 23BC 233BC 223BC 2233BC 2BVV 23BVV 233BVV 223BVV 2233BVV 2BVVC 23BVVC 233BVVC 223BVVC 2233BVVC F23B F23BVV...
  • Page 78 Product documentation THETA NORM/UNIT...

  • Page 79: General Controller Functions

    Product documentation THETA NORM/UNIT General controller functions Outside Temperature Measurement 7.1.1 Determination of long-time value and mean value Function: Three values are used to calculate the effect of the outside temperature on the heating behavior of the plant. Current outside temperature: Value of sensor at time of measurement Long-time value outside temperature: •...

  • Page 80: Heating Circuit Outside Temperature Assignment (Outdoor Sensor 2)

    Product documentation THETA NORM/UNIT 7.1.3 Heating Circuit Outside Temperature Assignment (Outdoor Sensor 2) NOTE: Function active only when using a second outdoor sensor! Function: If a second outdoor sensor (OS2) is connected to a variable input in the central unit, the heating circuit can be assigned either to external sensor 1, 2 or to the mean value of both sensors.

  • Page 81: Climate Zone

    Product documentation THETA NORM/UNIT Climate zone Function: The climate zone is the coldest outside temperature value to be expected. For the heat demand coverage, this value is used as the basis for the design of the heating system This parameter defines the corresponding steepness value of the heating curve of the heating circuit with regard to the set climate zone.

  • Page 82: System Frost Protection

    Product documentation THETA NORM/UNIT NOTE: The HEATING LIMIT parameter can be used to assist the summer switch-off function during the transitional seasons (see selection levels unmixed circuit, mixed circuit 1 or mixed circuit 2 - Parameter 7). This function allows setting non-heating periods on warm days during the transitional seasons for each individual heating circuit.
  • Page 83 Product documentation THETA NORM/UNIT CAUTION In connection with a room sensor, the thermostat function is not active with active frost protection. Cycle Operation The existing frost protection function will be complemented by the option of cyclic frost protection in Version 2.1. The frost protection function is activated as soon as the temperature drops below the set frost protection limit (SYSTEM-PARAMETER 5), in the same way as before.

  • Page 84: Pump And Mix Valve Forced Operation (Anti-Blocking Protection)

    Product documentation THETA NORM/UNIT Pump and mix valve forced operation (Anti-blocking protection) Function: With this function 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 (>...

  • Page 85: Hydraulic Components And Their Functions

    Product documentation THETA NORM/UNIT Hydraulic components and their functions Heat Generator: Boiler 8.1.1 Heat Generator Start-up Protection (..2.., ..22.., ..C..) Start-up protection prevents the deposit of condensate during heating up. H-GEN Start-up protection: There are three different modes of start-up protection that can be set: Unlimited start-up protection When the temperature in the heat generator drops to 2 K below the set minimum limit, all heating circuits are separated, at the water side, from the heat generator...

  • Page 86: Heat Generator Minimum Temperature Limit

    Product documentation THETA NORM/UNIT 8.1.2 Heat Generator Minimum Temperature Limit (..2.., ..22.., ..C..) Function: In order to protect the heat generator against agressive condensate the minimum temperature limit documented by the manufacturer of the heat generator is to be set. The heat generator switches on when the temperature falls below the set value, while it switches off when the set value plus the burner switching differential is exceeded.

  • Page 87: Heat Generator Maximum Temperature Limit

    Product documentation THETA NORM/UNIT 8.1.4 Heat Generator Maximum Temperature Limit (..2.., ..22.., ..C..) Function: In order to protect the heat generator against overheating, the controller is equipped with an electronic maximum temperature limit. It shuts off the burner if the temperature in the heat generator exceeds the limit value.
  • Page 88 Product documentation THETA NORM/UNIT 8.1.6 Minimum Burner Run Time (..2.., ..22..) Function: This function extends the burner run times and reduces the standby losses. After starting the burner, at least the set time must lapse before the burner is deactivated again.
  • Page 89 Product documentation THETA NORM/UNIT The decrease in temperature becomes slower every time stage II is switched off because stage I acts as a backup. Switch on line of stage II is not reached, temperature is rendered by stage I. The temperature decreases below switch on line of stage II due to higher heat demand. Swap SD Swap SD Switch-off line stage I...
  • Page 90 Product documentation THETA NORM/UNIT WW Loading Mode Stage II (..22..) By means of the "1 or 2-stage Domestic Hot Water Loading Mode" the loading mode for the hot water heater can be determined for 2 one stage or two-stage heat generators.
  • Page 91 Product documentation THETA NORM/UNIT Operation: Note on operation Key / parameter tree Parameter ..2.., ..22.., ..C.. Selection of heat generator type HEAT GENER. PARAMETER 01 (depends on controller type) Select sensor mode HEAT GENER. PARAMETER 06 Outdoor temp. locking HEAT GENER. PARAMETER 25 Basic load offset HEAT GENER.

  • Page 92: Minimum Burner Run Time

    Product documentation THETA NORM/UNIT Activation of modulation The modulating burner stage is activated when the heat generator temperature has dropped below the setpoint by more than 1K. The burner is enabled through the burner relay. As soon as the heat generator temperature exceeds the switch-off line, the burner is deactivated.

  • Page 93: Modulation Starting Time

    Product documentation THETA NORM/UNIT 8.1.8.5 Modulation starting time The starting time parameter determines the length of the start-up phase in modulation mode so that a stable start-up is ensured. As soon as the set starting time has expired, the modulation switches to its normal control characteristics defined by the modulation parameters.

  • Page 94: Control Of Communicating Heat Generators (H-Gen Type 5)

    Product documentation THETA NORM/UNIT Connecting THETA NORM If installing the THETA NORM type, connect as follows: • Connection burner ON to connection of burner 1 (see Chapter 12.1.2, X3 - 1 and 2) • Connection modulation OPEN to connection of burner 2 (see Chapter 12.1.2, X4 -17 and 18) •...

  • Page 95: Charging Pump (Chp)

    Product documentation THETA NORM/UNIT Function: This function regulates the necessary measures when the permitted flue gas temperature is exceeded. Displays only flue gas temperature No function for control; the current flue gas temperature appears on the information display. Heat generator locking in case of exceeding limit for the set time If the limit value is exceeded, the heat generator is blocked for the set time and a malfunction message is triggered.

  • Page 96: Primary Pump (Pp)

    Product documentation THETA NORM/UNIT 8.1.12 Primary pump (PP) The primary pump is the functional equivalent of a CHP, with the following exceptions: • DHW demand does not go to PP (charging pump only for heating circuits) • The extended run time is the same as for CHP (same parameters) •...

  • Page 97: Parallel Heat Generator Release (Phr)

    Product documentation THETA NORM/UNIT BCP extended running time: If there is no longer a demand to the heat generator the boiler circuit pump switches off with time delay in order to avoid a safety switch-off of the heat generator at high temperatures.

  • Page 98: Bypass Pump

    Product documentation THETA NORM/UNIT 8.1.15.1 Bypass pump (..VV..) Function: The return control with a bypass pump (RBP) represents a simple method for a return temperature control. If the return temperature of the heat generator falls below the set return low limit the bypass pump, which is installed parallel to the heat generator, is switched on for flow temperature addition.

  • Page 99: Indirect Return Control

    Product documentation THETA NORM/UNIT 8.1.15.3 Indirect return control Function: Indirect return control is realized by means of the mixer valves in the heating circuits. It only works for heating systems without a bypass pump and without controlled flow mixing. When this function is active, two values are calculated independently for regulating each mixing circuit.

  • Page 100: External Heat Generator Disable

    Product documentation THETA NORM/UNIT 8.1.17 External heat generator disable Function: If the corresponding variable input has a short circuit because of a switching contact, the heat generator is switched off after all demands are blocked. The logical error monitoring is switched off. After the short circuit is repaired, the heat generator is enabled directly.

  • Page 101: Dhw Operation In Combined Devices

    Product documentation THETA NORM/UNIT 8.1.19.2 DHW operation in combined devices If a combined device with MCBA is connected to a controller (RSC, N/U), the display and operation of the DHW temperatures in the switching times is blocked because the setpoint can not be set at the controller. NOTE: The operation of a controller in combination with an MCBA boiler control is a special case.

  • Page 102: Heat Generator Forced Dissipation

    Condensing boilers with MCBA boiler controls have a connection for an outdoor and hot water tank sensor by Honeywell. In combination with the controller series THETA, the outdoor and hot water sensors of the standard unit as well as the Honeywell sensors can be used.

  • Page 103: Operating Hours Counter

    Product documentation THETA NORM/UNIT 8.1.21 Operating hours counter Function: The system has two operating hours and burner start-up counters (each for the first and second stage). The display is in the INFO-level of the controller. If an operating hours counter is connected to the corresponding inputs of the controller (OHC inputs), this value is used for calculation.
  • Page 104 Product documentation THETA NORM/UNIT Outdoor temperature (°C) CAUTION In order to measure the room temperature the heating circuit of the most occupied room is to be used. Radiator thermostats are used together with correctly designed radiators to control the external heat gain and should hence be almost completely open. During the adjustment phase additional external heat sources like fireplaces, majolica stoves, etc.

  • Page 105: Heating Circuit Reduced Mode

    Product documentation THETA NORM/UNIT 8.2.1.2 Heating Circuit Reduced Mode Function: During reduced mode you can choose between two operating modes: RED: reduced mode The direct heating circuit’s heating circuit pump remains active during reduced mode (see Switching Time Program). The flow temperature is determined by the relevant reduced heating characteristic according to the decreased room setpoint.

  • Page 106: Heating System (Exponent)

    Product documentation THETA NORM/UNIT 8.2.1.3 Heating system (exponent) Function: This parameter refers to the type of heating system (floor, radiator, convector heating) and can be compared to the exponent of the relevant heat exchanger. The setting determines the curvature of the heating characteristic of the direct heating circuit and compensates the performance losses at low temperatures by means of its progressive characteristic.

  • Page 107: Heating Circuit Parallel Shift

    Product documentation THETA NORM/UNIT CAUTION To protect the floor heating systems against accidental overheating (malfunction – manual mode) a controller-independent maximum temperature limit must be provided. In this case a contact thermostat is recommended. By means of its switching contact the control phase of the relevant heating circuit pump is looped. The thermostat is to be set at the maximum permissible system temperature.

  • Page 108: Screed Function

    Product documentation THETA NORM/UNIT 8.2.1.7 Screed function NOTE: This function is not active if the heating circuit control is set at constant control (CC). Function: The screed function is used exclusively for the required drying of newly applied screed on floor heating systems. The process is based on recommendations of the German Bundesverbandes Flächenheizungen (Federal Association for Surface Heating) concerning the heating of fresh floor covers (heating according to a mandatory temperature profile).
  • Page 109 Product documentation THETA NORM/UNIT Example: Maximum temperature setting for the heating circuit = 40 °C 1. Day: constant heating at 25 °C 2. Day: constant heating at 30 °C 3. Day: constant heating at 35 °C 4. Day: constant heating at 40 °C 5.-15.

  • Page 110: Assessment Of The Room Temperature / Room Influence

    Product documentation THETA NORM/UNIT NOTE: The maximum profile temperature is determined by the respective maximum flow temperature limit. After a short power failure of restart, a previously activated screed function is continued where it was interrupted. The Screed function parameter is automatically set to OFF when the function is completed.

  • Page 111: Room Factor Heating Circuit

    Product documentation THETA NORM/UNIT Room sensor off, operation enabled If these settings are active, the room sensor only has a display character and does not influence the functions. Operation of the room device is possible. Application: All plant types that do not allow for room influence but (in contrast to the setting OFF) display of the current room temperature is desired.

  • Page 112: Room Controller Heating Circuit

    Product documentation THETA NORM/UNIT 8.2.2.3 Room Controller Heating Circuit At this setting the heating circuit concerned can be controlled through a room controller. This requires a room device THETA RS with room control function. The room controller directly determines the required flow setpoint and transmits this information to the central device.

  • Page 113: Heating Circuit Room Frost Protection Limit

    Product documentation THETA NORM/UNIT 8.2.2.5 Heating Circuit Room Frost Protection Limit Function: This function determines the room setpoint of the corresponding heating circuit during switch-off mode with frost protection activated. • during holiday mode • in automatic mode between the heating cycles with active ECO function. •...

  • Page 114: Heating Circuit Switch-On Optimisation

    Product documentation THETA NORM/UNIT 8.2.2.7 Heating Circuit Switch-on Optimisation Function: With this function the latest heating up time is calculated considering the outside and room temperature (heat loss) to assure the desired room temperature at the set occupancy start time. The switch-on times saved in the switching time programs for the relevant heating circuit do not refer any longer to the heating start time but to the occupancy start time (i.e.

  • Page 115: Optimisation For Room Controller (Rc)

    Product documentation THETA NORM/UNIT 8.2.2.8 Optimisation for room controller (RC) The advance time is determined adaptively by the room controller. To this end, a room station THETA RS must be connected and parameterised as a room controller in the corresponding heating circuit level (parameter 4 = RC).

  • Page 116: Sample Time Ta

    Product documentation THETA NORM/UNIT Note: The adjustment time can be determined through the Ziegler-Nichols method. The mixer 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) by means of the Relay Test function.
  • Page 117 Product documentation THETA NORM/UNIT Example of the coaction of P-band, I-band, adjustment time and sample time Step response to different control deviations Mixer opening (%) (open control circuit, actuator pulled off) Position OPEN Integral action time Tn=7 min Sample time Ta=20 sec Mixer running time = 2 min The P-pulse, which is proportional to the control deviation, is followed by further actuator pulses if the control...

  • Page 118: Function Heating Limit

    Product documentation THETA NORM/UNIT 8.2.4 Function Heating Limit This parameter supplements the summer switch-off function. It deactivates the respective heating circuit as soon as the computed flow temperature setpoint approaches the present room temperature setpoint. The parameter heating limit can be activated separately for each heating circuit. Function: Switch-off: Flow-set <...
  • Page 119 Product documentation THETA NORM/UNIT After: Temperature setting hot water daytime temperature: 52 °C Temperatures in switching-time program: 5:00 8:00 62 °C 08:00 16:00 52 °C 16:00 22:00 62 °C Changed settings are stored when key § or î is briefly pressed again or after automatic return at a preset time.
  • Page 120 Product documentation THETA NORM/UNIT Temperature assessment: Mode of temperature assessment This function determines the type of temperature assessment in the DHW tank. Usually an electronic temperature probe (immersion sensor in the hot water tank) is used for this purpose. The temperature-dependent electric resistance of the probe is utilized.
  • Page 121 Product documentation THETA NORM/UNIT Conditional priority: The heating circuits are enabled when the temperature in the heat generator exceeds the current DHW target value. The heating circuits will be enabled according to the following criteria: Enabling the heating circuits: H-GEN actual temperature > DHW setpoint + DHW switching differential/2 + 10 K Disabling the heating circuits: H-GEN actual temperature <...
  • Page 122 Product documentation THETA NORM/UNIT Note: The heat generator minimum temperature limit operates continuously to protect the heat generator and blocks the DHW loading pump in case of temperatures below the set value. CAUTION In case of DHW temperature settings above 60°C this function should not be activated to avoid safety switch-off (in particular for heat generators with a low water capacity).

  • Page 123: Circulation Pump (Cir.)

    Product documentation THETA NORM/UNIT Tank sensor 2: For complete loading of a hot-water tank by means of automatic measuring point changeover between tank sensors 1 and 2 (layer loading). The measured value of the hotter sensor (DHWS1 or DHWS2) is evaluated for the activation of the loading pump.

  • Page 124: Electrical Heating Element (Elh)

    Product documentation THETA NORM/UNIT 8.3.3 Electrical Heating Element (ELH) Function: The function controls indirectly (via circuit breaker) an electrical water heater if the automatic summer switch-off is active. An external DHW thermostat including the necessary safety installation will take care of the switch off function.
  • Page 125 Product documentation THETA NORM/UNIT Switch-off differential: Solar switch-off differential (SD If the temperature difference between panel flow and buffer tank falls below this adjusted differential, the pump will be switched off and the loading terminated. The maximum value is always 3K below the switch on differential. Minimum running time: Minimum running time solar charging pump (SOP)
  • Page 126 Product documentation THETA NORM/UNIT Priority mode DHW If the temperature in the DHW tank (DHWS) sinks under the nominal DHW-value by the set value during priority solar loading, the solar priority mode is switched off until the nominal DHW-value is reached. Example: DHW setpoint 50°C Set value changeover: 10K...
  • Page 127 Product documentation THETA NORM/UNIT Anti-blocking protection: This is an automatic function of the controller. If the solar loading pump was switched off for longer than 24 hours, then it will be started for 20 seconds in order to prevent blocking through corrosion. Operation of solar parameters: Note on operation Key / parameter tree...
  • Page 128 Product documentation THETA NORM/UNIT Operating modes: To support the full range of available combination options in multivalent heating systems with buffer support, the control system offers the possibility to set various operating modes for buffer operation. The different settings cause different processing sequences of heat requests for heating circuits and hot water.
  • Page 129 Product documentation THETA NORM/UNIT The heating circuit controls send their demand value to buffer control. Hot-water and buffer control request energy from the heat generator when required. With hot-water priority activated, this function acts on the buffer loading pump but not on the heating circuits.
  • Page 130 Product documentation THETA NORM/UNIT Operating mode 4 – Discharge control for HC requests only System hydraulics: HC-P BULP Heat- BURN 1 generator Buffer DHWS SOL-P Domestic hot water tank Controller function: Buffer demand As operating mode 3, except that the requests from DHW control are sent directly to the heat generator.
  • Page 131 Product documentation THETA NORM/UNIT Operating mode 6 – Discharge control to heat generator System hydraulics: HC-P BULP DHWS SOL-P Heat generator Buffer Domestic hot water tank This hydraulic layout is used when an alternative-energy buffer tank is added to an existing system.
  • Page 132 Product documentation THETA NORM/UNIT only if hot water loading is not active H-GEN is not available if • an external heat generator disable is connected to a VI • inhibition H-GEN by parameterisation in solid fuel menu tree is active •...
  • Page 133 Product documentation THETA NORM/UNIT Maximum temperature limit: Buffer tank maximum temperature limit If the temperature in the buffer tank exceeds the adjusted value, then the loading pump is switched off. The excessive heat energy will be dissipated in preselected circuits (see forced discharge). The dissipation will be disabled if the temperature in the buffer tank drops 2 K below the maximum limit.
  • Page 134 Product documentation THETA NORM/UNIT Start-up protection: Buffer start-up protection (only with charging control) In buffer operation there is no start-up protection for the heat generator acting on the heating circuits. The start-up protection only acts on the buffer loading pump. When buffer start-up protection is switched on and the buffer tank temperature drops below the minimum temperature limit, all consumer circuits are separated hydraulically (pumps are switched off).

  • Page 135: Solid Fuel Loading Pump (Sfp)

    Product documentation THETA NORM/UNIT Solid Fuel Loading Pump (SFP) NOTE: This function is only enabled, if a variable output is assigned to a solid fuel pump. The following sensors can be used for this function: • SFS for the solid fuel boiler sensor The connection is made according to the assignment to VI1 or VI2.
  • Page 136 Product documentation THETA NORM/UNIT Prerequisite: The temperature of the solid-fuel boiler is at least 10 K over the minimum temperature limit. The minimum value is 3K above the switch off differential. Switch-off differential: Switch-off differential solid fuel boiler buffer tank (SD If the temperature difference is lower than the switch-off differential, the loading process is terminated and the pump is switched off.

  • Page 137: Tank Charge Changeover

    Product documentation THETA NORM/UNIT Tank charge changeover In systems that have both an external hot water tank and a buffer tank, a diverter valve can be used to switch between loading the hot water tank and loading the buffer tank from solar equipment. Description: The use of a changeover delay (Parameter 15 solar tree) sometimes causes problems.

  • Page 138: Heat Forced Dissipation Valve

    Product documentation THETA NORM/UNIT Heat forced dissipation valve Function: This function allows preventing the degassing of the medium at high solar panel temperatures in solar power systems. Such degassing can occur when the solar heat tank is full (maximum temperature exceeded) and, consequently, forced dissipation into the heat tank is impossible.

  • Page 139: Hydraulic Buffer Release (Hbr)

    Product documentation THETA NORM/UNIT Hydraulic buffer release (HBR) (..VV..) Buffer tank SPBU In buffer charging systems (buffer operating modes 1, 2 and 5), the buffer tank is charged by the H-GEN without buffer release before the heating circuits can take up energy. First, the hydraulic buffer release charges the top buffer area and the heating circuits are switched on.

  • Page 140: Heating Circuit Constant Temperature Control

    Product documentation THETA NORM/UNIT 8.10 Heating Circuit Constant Temperature Control (..2.. or ..3..) NOTE: This function must be activated in the HYDRAULIC menu for the corresponding heating circuit (Direct heating circuit, Mixing circuit 1, Mixing circuit 2). Function: The control circuit is operated at a constant flow temperature value. The demand value is transmitted to the heat generator.

  • Page 141: Demand Contact

    Product documentation THETA NORM/UNIT 8.12 Demand contact NOTE: This function is available if a variable input is defined as demand contact and the corresponding output is defined as heating circuit (mixed circuit, unmixed circuit, constant temperature control and fixed value control) in the HYDRAULIC menu. Function: One demand contact can be assigned to every one of the three variable inputs (VI1 - VI3).

  • Page 142: Global Malfunction Message Output

    Product documentation THETA NORM/UNIT 8.13 Global Malfunction Message Output NOTE: This function must be activated in the HYDRAULIC level for a variable output (VO1 or VO2). Function: The function is activated during errors and serves as a common global malfunction message output for the connection of optical or acoustic signals.

  • Page 143: External Switching Modem

    Product documentation THETA NORM/UNIT 8.16 External switching modem NOTE: This function is available if a variable input (VI1...VI3) was defined as the switching modem in the HYDRAULIC menu. Function: In this configuration, an external modem can be used in order to switch different operation modes (by telephone) remotely.

  • Page 144: External Information

    Product documentation THETA NORM/UNIT 8.17 External information NOTE: This function must be activated in the HYDRAULIC level for a variable input (VI1 to VI3). Function: This function displays a temperature value in the information display as an info-value which is registered by a standard sensor. The function is not influenced by a controller and is only for your information.

  • Page 145: Data Bus / Bus Communication / Room Controllers

    Product documentation THETA NORM/UNIT Data bus / Bus Communication / Room controllers The data bus system Function: The controllers THETA can be connected by a data bus. This enables • controlling further heating circuits by adding up to four additional standard units •...

  • Page 146: Control Functions Via The Bus

    Product documentation THETA NORM/UNIT 9.1.2 Control functions via the bus 9.1.2.1 Boiler corrosion protection If the heat generator is working with boiler corrosion protection, then this status is sent to all corresponding heating circuits. These will then block the energy supply for the time being (valves closed and pumps off). 9.1.2.2 Indirect return temperature control The heat generator in the central controller (ADR 10) sends its current boiler data to each mixing circuit in...
  • Page 147 Product documentation THETA NORM/UNIT Operation of wall devices 9.2.1 Operation of wall devices RS Function: A wall device RS can be connected to the controller. With a wall device, remote control for a standard unit (e.g. from a living room) is possible in addition to the room temperature detection.

  • Page 148: Operation With Wall Device Rff

    Product documentation THETA NORM/UNIT 9.2.2 Operation with wall device RFF Function: A wall device RFF can be connected to the controller. With a wall device, it is possible to detect the room temperature, to remotely adjust the room setpoint temperature and to change the operating mode for a heating circuit.
  • Page 149 Product documentation THETA NORM/UNIT Automatic mode: The heating circuit is controlled constantly in accordance with the specification of the automatic program P1 - P3 set in the standard unit plus or minus the room setpoint correction at the rotary button. Heating: The heating circuit is controlled constantly in accordance with the desired daytime room temperature plus or minus the room setpoint correction at the rotary button.

  • Page 150: Bus Priority Heating Circuit

    Product documentation THETA NORM/UNIT 9.2.3 Bus priority heating circuit Function: This setting serves to determine the privilege status of a room station connected to a heating circuit. One parameter per available heating circuit is available for this setting. Possible setting: Simple access Only switching times and parameters of the own heating circuit can be read and modified.

  • Page 151: Expanding The System By Several Standard Units

    Product documentation THETA NORM/UNIT Expanding the system by several standard units 9.3.1 Examples with several controllers Example 1: Heating system with 2 stage heat generator, DHW control, and 4 mixed circuits. The following diagram shows the hydraulic system. DHW tank Boiler The following components will be connected to the first controller with busadress 10: •...

  • Page 152: Unrestricted Use Of Gateway Gwk

    Product documentation THETA NORM/UNIT Example 2: Heating system with 2 stage heat generator, 2 mixed circuits and 2 DHW controls (e.g. for a semi detached house with one boiler only). The following diagram shows the hydraulic system. DHW tank DHW tank Boiler Unrestricted use of Gateway GWK Starting in software version 2.x, the Gateway Web (THETA GWK) will be available to the full extent.

  • Page 153: Cascading Of Heat Generators In The Bus System

    Product documentation THETA NORM/UNIT Cascading of heat generators in the bus system 10.1 General description of cascading of control devices In heating applications, a cascade is the hydraulic connection of several heat generators of different types to create a complex of heat generators. The advantage compared to a single heat generator of the same capacity is that only the necessary number of heat generators supply to the heat demand.
  • Page 154 Product documentation THETA NORM/UNIT Switch-over power • The switch-over power set in the cascade level is only suitable for operating boiler controls. Until the last burner stage has been started, all active burner stages up to that moment are reduced to the set switch-over power (capacity limitation). After the last burner stage is activated, all the others are enabled to perform at 100 % capacity (full load).

  • Page 155: Mode Of Operation Of Cascade Control

    Product documentation THETA NORM/UNIT Changeover basic load in group formation: Wenn the group is formed by parameterization and the peak load boiler(s) are activated, the leading groups can be switched via a parameter. If this parameter is on ON, the group of peak load boilers, on demand, takes over the basic load and the basic load boilers take over the correction of the flow temperature.

  • Page 156: Switch-Off Behavior

    Product documentation THETA NORM/UNIT 10.3.2 Switch-off behavior The number of stages is reduced as soon as the boiler temperature of the leading boiler or the common flow sensor exceeds the current set boiler temperature plus half of the switching differential during the calculated switch-off delay. The switch-off delay is reduced if the actual temperature is far above the switching differential.

  • Page 157: Operation With Boiler Control (New)

    Product documentation THETA NORM/UNIT 10.3.5 Operation with boiler control (new) THETA controllers with communicative heat generator interfaces (..C..) enable connecting more than one heat generator per controller. The cascade control in the THETA system comprises a main cascade and, depending on the plant design, one or more subcascades.
  • Page 158 Product documentation THETA NORM/UNIT Information display: If a subcascade is recognized, the standard unit shows a detailed information display. Detailed temperature display heat generator: INFORMATION Display value Notes Heat generator HEAT GENER. Combined display of heat generator address and actual temperature H-GEN actual ADR-1...

  • Page 159: Operation With Group Reversal

    Product documentation THETA NORM/UNIT Function: The set switch-over power in the CASCADE level and the basic load excess in the HEAT GENER. level are only suitable for operation with a boiler control. Until the last burner stage has been started (basic load mode), all active burner stages up to that moment are reduced to the set switch-over power (ventilator rpm limitation).

  • Page 160: Behavior During Heat Generator Fault

    Product documentation THETA NORM/UNIT Example for switching sequence: Heat generator for peak load Heat generator for basic load H-GEN 1 H-GEN 2 H-GEN 3 H-GEN 4 H-GEN 5 Sequence Sequence Sequence Group switch ñ basic load is taken over by peak load heat generators: Sequence In some cases, it might be better to have the peak load boilers take over the basic load if they are necessary.
  • Page 161 Product documentation THETA NORM/UNIT Emergency mode: The parameters of cascade control are determined 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 nominal temperature (parallel operation).
  • Page 162 Product documentation THETA NORM/UNIT 10-10...

  • Page 163: Help For Commissioning, Maintenance And Problem Solving

    Product documentation THETA NORM/UNIT Help for commissioning, maintenance and problem solving 11.1 Automatic Set-Function Function: This function allows to remove heating or hot water circuits from operation. The control circuits are registrated automatically, if their corresponding sensors are connected and provide acceptable measuring values. Control circuits without the corresponding sensors remain automatically without consideration.

  • Page 164: Check Safety Temperature Limiter

    Product documentation THETA NORM/UNIT For the boiler sensor: Level HEAT GENERATOR Parameter 1 – Type of heat generator Setting range OFF or 1 (1-stage-burner) With that a programmed parameterisation will not be changed again, the current values will be checked before. A modification is carried out only if one of the adjustments listed above is given.

  • Page 165: Relay / Function Test

    Product documentation THETA NORM/UNIT 11.3 Relay / Function Test Function: Depending on the controller version various outputs can be tested. This is not only a relay test, but a function test by means of which the hydraulic components are tested. The partially compulsory sequence of the switching procedures is considered.

  • Page 166: Malfunction Messages

    Product documentation THETA NORM/UNIT 11.4 Malfunction messages In order to set up a precise diagnosis in the case of malfunction the control system is equipped with an extensive malfunction message system. An occurring error is always announced in the display of the corresponding basic control and stored.
  • Page 167 Product documentation THETA NORM/UNIT Table of malfunction messages: Error jams Designation Alarm cause Code Note System Outdoor sensor break 10-0 System Outdoor sensor short circuit 10-1 System Boiler sensor break 11-0 System Boiler sensor short circuit 11-1 System Flow sensor 1 break 12-0 MCP=off, MIMO=de-...

  • Page 168: Error Messages Basic Display / Error Stack

    Product documentation THETA NORM/UNIT If a boiler control is connected, helpful error messages may come from the boiler control which will be displayed as follows: Error type Error code Field 1 Field 2 Field 3 Hydrau. press 80-1 HYDRAU. PRESS HIGH Hydrau.

  • Page 169: Oem-Information For Troubleshooting

    Product documentation THETA NORM/UNIT 11.4.2 OEM-Information for troubleshooting 11.4.2.1 Controller complete reset A complete reset can be carried out to change the settings of the controller back to the settings at delivery. All parameters, values and counters accessible via the enabled code will be reset and the controller will be restarted.
  • Page 170 Product documentation THETA NORM/UNIT 11-8...

  • Page 171: Mounting

    Product documentation THETA NORM/UNIT Mounting 12.1 Mounting instructions for NORM type All standard units are designed exclusively as units for incorporation and will be installed from the front side into the boiler panel after finishing the electrical wiring. The instrument is fastened by a quarter turn clockwise of the quick clamping devices at the left and right side of the front panel (1).
  • Page 172 Product documentation THETA NORM/UNIT 12.1.2 Electrical installation 230 V~ Connections Sensor and data bus connections Floating exit for heat generator, output 23 - Ground for data bus and sensors (stage 1) 24 - Data bus signal A Floating exit for heat generator, input 25 - Data bus signal B (stage 1)

  • Page 173: Mounting Instructions For Unit Type

    Product documentation THETA NORM/UNIT 12.2 Mounting instructions for UNIT type 12.2.1 Mounting UNIT The boiler control panel is completely prewired and will be mounted from the front side into the panel cut-out of the boiler after finishing the electrical wiring. The panel is fastened with the four enclosed screws.

  • Page 174: Electrical Installation

    Product documentation THETA NORM/UNIT 12.2.2 Electrical installation The electrical installation is done at the back side of the boiler control panel via the plugged-in connection terminals corresponding to the identification on the coloured- marked connection pads. Caution: Low voltage connecting terminals: 230 V~ All blue marked connecting terminals work with safety low voltage and must not get into contact with the mains voltage.

  • Page 175: Electrical Connection

    Product documentation THETA NORM/UNIT 12.2.3 Electrical connection 230 V~ Connections Sensor and data bus connections 01 - Mains 230V~ +6/-10%, 50 Hz 14 - Outdoor sensor 02 - Safety circuit 1 (burner loop) 15 - Heat generator sensor/boiler sensor 03 - Safety circuit 2 (burner loop) 16 - DHW sensor...

  • Page 176: Mounting Instructions For Mounting With Wall Socket Ms-K

    Product documentation THETA NORM/UNIT 12.3 Mounting instructions for mounting with wall socket MS-K Application: The wall socket MS-K is used for wall mounting application of all types of standard units. Application: The wall-mounted connection base is intended for the sole purpose of housing the standard unit.
  • Page 177 Product documentation THETA NORM/UNIT Insert standard unit with evenly distributed pressure. The electrical connection is done by plugging the instrument into the terminals at the socket print. Lock standard unit with both quick clamping devices left and right. NOTE! Cables with mains voltage must be installed separate from low voltage cables (data bus, sensors etc.).

  • Page 178: Electrical Connection In Wall Socket Ms-K

    Product documentation THETA NORM/UNIT 12.3.2 Electrical connection in wall socket MS-K 230 V~ Connections N (mains) HC-P SOL-P L1 (mains) MC1-P MC2-P Sensor and data bus connections Burner connections Control terminal stage 1 Control terminal stage 1 -data bus- Op. hours counter burner stage 1 Outdoor Op.

  • Page 179: Mounting Instructions Remote Unit

    Product documentation THETA NORM/UNIT 12.4 Mounting instructions remote unit 12.4.1 Mounting location - for applications without room sensor Without room sensor function the remote unit may be fixed at any place in the interior range. - for applications with room sensor The remote unit should be fixed at a height of approx.

  • Page 180: Electrical Connection

    Product documentation THETA NORM/UNIT NOTE! For new installations use an underplaster wiring box for perfect wiring. Locating lug 12.4.2 Electrical connection The wiring between remote unit and standard unit or boiler control panel has to be made by a shielded data bus cable at terminals A and B of both units. The connections may not be switched and must be installed according to the labelling of the terminals A/B in the wall socket.

  • Page 181: Mounting Instructions Wall Device Rff

    Product documentation THETA NORM/UNIT Operation Note on operation Key / parametertree Parameter Setting the bus address DATA BUS PARAMETER 01 Control mode SYSTEM CONTROL MODE 12.5 Mounting instructions wall device RFF A - Mounting location The remote unit should be fixed at a height of approx. 1.20 -1.50 m at a place most representative of all rooms.
  • Page 182 Product documentation THETA NORM/UNIT Remote unit open (front cover removed) Rotating encoding switch for setting bus address Contact strip 12-12...

  • Page 183: Accessories

    Product documentation THETA NORM/UNIT Accessories 13.1 Outdoor sensor AF Outdoor sensor AF Mounting location The outdoor sensor should be installed on the coldest side of the building (north or north-west) at approx. one third of the buildingís height (minimum distance from the ground: 2 m).

  • Page 184: Immersion Sensor Kvt

    Product documentation THETA NORM/UNIT 13.2 Immersion sensor KVT Immersion sensor KVT 20... Types: KVT 20/2/6 cable length 2 m Application: Boiler sensor, hot water sensor (for boiler integrated hot water tanks), return flow sensor KVT 20/5/6 cable length 5 m Application: Hot water sensor (for add-on tanks, buffer tanks, solar collector return flow sensor etc.

  • Page 185: Flow Sensor Vf

    Product documentation THETA NORM/UNIT 13.3 Flow sensor VF Feeding sensor VF Types: VF 202 cable length 2 m VF 204 cable length 4 m Application: Contact sensor for mixer controlled heating circuits onto flow- or return pipes Mounting location: Used as mixer flow sensor: Behind the mixer pump for mixed heating circuit in the minimum distance of 50 cm.

  • Page 186: Flue Gas Sensor / Solar Panel Flow Sensor

    Product documentation THETA NORM/UNIT 13.4 Flue gas sensor / solar panel flow sensor Types: PT1000/6 cable length 2.5 m Application: Flue gas temperature Collector flow temperature Mounting location: - In the flue gas tube in the minimum distance of the double tube diameter - In the immersion sleeve of the solar collector.

  • Page 187: Technical Data

    Product documentation THETA NORM/UNIT Technical Data 14.1 General Power supply voltage: 230V +6%/ -10% Rated frequency: 50...60 Hz Power input: max. 5.8 VA Recommended pre-fuse: max. 6.3 A slow Output relay contact load: 2 (2) A Bus interface: T2B to connect to external devices (remote station, PC, modem or gateway) Power supply via T2B bus: 12 V/ 150 mA Ambient temperature:...

  • Page 188: Digital Inputs

    Product documentation THETA NORM/UNIT 14.2 Technical data for sensor and digital inputs 14.2.1 Sensor Resistance Values Resistance values KTY-sensor for AF, H-GENS/BS, DHWS, VF1, VF2, VI1 (setting not FGS), VI2, VI3, SPBU °C kOhm °C kOhm °C kOhm °C kOhm 1.386 1.630 1.922...

  • Page 189: Index

    Product documentation THETA NORM/UNIT Index "Time - Date" Menu ......5-23 Daytime Water Heater Temperature ..5-3 ALARM Level ........5-49 Demand contact .......8-57 Absent Mode ........5-6 Digital inputs measuring ranges ..14-2 Anti-blocking protection ..... 7-6 Domestic Hot Water-daytime Anti-blocking protection SFP ... 8-52 temperature ........8-34 Automatic Set-Function ....
  • Page 190 Product documentation THETA NORM/UNIT Hydraulic parameters ......6-4 Room Controller .......8-28 Information temperature ....8-60 Room Influence ........8-26 Legionella protection ....... 8-35 Room factor ........8-27 Legionella protection day ....8-18 Room frost protection limit ....8-29 List of abbreviations ......4-1 Room influence ........8-26 Long-time value outside temperature 7-1 Room thermostat function ....8-29...
  • Page 191 Product documentation THETA NORM/UNIT Temperature displays ...... 5-12 Variable inputs and outputs ....6-4 Thermostat ........8-36 Weather controlled heating Time delay stage II ......8-5 operation ..........8-19 Time programs ........ 5-32 Weather responsive parallel mode ..8-37 Timer ..........8-58 Parallel mode ........8-36 User interface ........
  • Page 192 PD_THETA NURS_EbV_GB_0460017001_0612-23...

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