Siemens Synco 700 Series Basic Documentation
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Siemens Synco 700 Series Basic Documentation

Modular boiler sequence controller including extension modules rmz785, rmz787, rmz788 and rmz789
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™
Synco
700
Modular boiler sequence controller RMK770
including extension modules RMZ785, RMZ787, RMZ788 and
RMZ789
Basic Documentation
Edition 2.1
Controller series B
CE1P3132en
23.04.2009
Building Technologies

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Summary of Contents for Siemens Synco 700 Series

  • Page 1 ™ Synco Modular boiler sequence controller RMK770 including extension modules RMZ785, RMZ787, RMZ788 and RMZ789 Basic Documentation Edition 2.1 Controller series B CE1P3132en 23.04.2009 Building Technologies...
  • Page 2 Siemens Switzerland Ltd © 2004-2009 Siemens Switzerland Ltd Industry Sector Subject to alteration Building Technologies Division International Headquarters HVAC Products Gubelstrasse 22 CH -6301 Zug Tel. +41 41 724 24 24 Fax +41 41 724 35 22 www.sbt.siemens.com 2/232 Building Technologies...

  • Page 3: Table Of Contents

    Contents Summary ....................... 11 Product range ....................11 System topology .................... 12 Equipment combinations ................12 Product documentation.................. 13 Important notes....................14 Operation....................... 15 Operation without operator unit ..............15 Operation with operator unit ................16 2.2.1 Functions of the operator unit................ 16 2.2.2 Operating concept ..................
  • Page 4 3.10 Leaving the password level................47 3.11 Marking changes....................47 3.12 Plant types and default terminal assignments ..........48 General settings.....................52 Time of day and date ..................52 4.1.1 Operating principle..................52 4.1.2 Communication ....................52 4.1.3 Fault handling ....................53 Selecting the language ..................54 Selecting the unit of temperature ..............54 Contrast of the operator unit’s display ............54 Text entry .......................54 4.5.1...
  • Page 5 5.8.2 Pump supervision and twin pumps..............70 5.8.3 Changeover logic................... 71 5.8.4 Overload message and supervision of flow........... 72 Boiler sequence management............... 73 Overview of function block................73 Configuration ....................74 Boiler sequence management............... 77 6.3.1 Concept ......................77 6.3.2 Orders for boilers to be switched on and off..........
  • Page 6 7.9.1 Maximum limitation of the boiler temperature ..........117 7.9.2 Minimum limitation of the boiler temperature ..........117 7.9.3 Protective boiler startup ................117 7.9.4 Optimization of the minimum boiler temperature .........118 7.9.5 Boiler shutdown ...................118 7.9.6 Protection against boiler overtemperatures ..........119 7.9.7 Pump kick and valve kick................119 7.9.8 Frost protection for the plant with boiler pump..........119...
  • Page 7 9.8.4 Pulse limitation .................... 146 9.8.5 Pump overrun and mixing valve overrun ............. 147 9.8.6 Pump kick and valve kick ................147 Text designation ..................147 9.10 Fault handling ....................148 9.11 Diagnostic choices..................148 Heating circuit control .................. 150 10.1 Overview of function block................
  • Page 8 10.8.6 Pump kick and valve kick................176 10.9 Heat demand ....................176 10.10 Extra functions .....................177 10.10.1 Text designations..................177 10.10.2 Acquisition of the room temperature ............177 10.10.3 Room control combination ................179 10.11 Fault handling ....................181 10.12 Diagnostic choices ..................182 Data acquisition ...................184 11.1 Trend......................184 11.1.1...
  • Page 9 13.5.3 Plant behavior....................197 13.6 State diagrams of the individual types of fault ..........198 13.7 Predefined fault inputs................. 199 13.8 Fault inputs ....................199 13.8.1 Universal fault inputs ................... 199 13.8.2 Analog fault input with limit value supervision ..........201 13.9 Communication....................
  • Page 10 16.2.6 Meters ......................223 16.2.7 Devices ......................223 16.2.8 Menu tree.....................223 16.3 Info pages ....................224 10/232 Building Technologies Boiler Sequence Controller RMK770 CE1P3132en HVAC Products Contents 23.04.2009...

  • Page 11: Summary

    Summary Product range Type of unit Description Product no. Controller Boiler sequence controller RMK770 Extension modules Universal module with 8 inputs RMZ785 Universal module with 4 inputs and 4 RMZ787 relay outputs Universal module with 4 inputs, 2 RMZ788 analog outputs and 2 relay outputs Universal module with 6 inputs, 2 RMZ789 analog outputs and 4 relay outputs...

  • Page 12: System Topology

    System topology RXB… QAW740 KNX TP1 RMZ790 RMZ791 RMK770 RMU7… RM… OCI700.1 Equipment combinations Description Technical data / product no. Data Sheet no. Passive sensors Sensors using sensing elements N1721…N1846, LG-Ni1000, Pt 1000 or T1 (PTC) N1713 Active sensors Sensors •...

  • Page 13: Product Documentation

    Product documentation In addition to this Basic Documentation, the product documents listed below provide detailed information on the safe and correct deployment and operation of Synco™ 700 products in building services plant. Type of document Classification Product range description "HVAC controllers with KNX interface” S3110 Data Sheet ”Boiler sequence controller RMK770”...

  • Page 14: Important Notes

    Synco™ 700 products may only be operated by staff who have been instructed by Operation Siemens Building Technologies or their delegates and whose attention has been drawn to potential risks. When wiring the system, the AC 230 V section must be strictly segregated from the...

  • Page 15: Operation

    Operation Synco™ 700 devices may only be operated by staff who have been instructed by Siemens Building Technologies or their delegates and whose attention has been drawn to potential risks. Operation without operator unit Without operator unit, the following operating elements on the controller and extension...

  • Page 16: Operation With Operator Unit

    Operation with operator unit 2.2.1 Functions of the operator unit The operator unit is used to make all settings and readouts required for operating the controller. All entries made on the operator unit are transmitted to the controller where they are handled and stored; the operator unit itself does not store any data. Informa- tion for the user is generated by the controller and forwarded to the operator unit where it is displayed.

  • Page 17: Operating Levels

    Start display: Display examples Wednesday 02.12.05 14:52 Welcome « Information Main menu » Setting level. Selection of a setting parameter, e.g. from the Main menu of the user level: Main menu Boiler sequence manager… Boiler 1… Boiler 2… Heating circuit Setting level, pop-up, setting a numerical value: Entry 1 Start:...

  • Page 18: Access Rights

    • Switching from the Info level to the setting level: Switching between the operating levels 1. Select the start page by pressing the ESC button. 2. Press the OK knob to change to the setting level. • Switching from the setting level to the Info level: 1.

  • Page 19: Commissioning

    Commissioning Preparation for use and commissioning of Synco™ 700 controllers must be undertaken by qualified staff who have been appropriately trained by Siemens Building Technologies. Basic concept Using the RMK770 controller, boiler sequencing can include up to 6 boilers. When selecting a plant type, boiler sequencing with 2 boilers is predefined.
  • Page 20 RMK770 To integrate the third boiler, 2 choices are available: Variant with Since the RMK770 controller does not have a sufficient number of outputs, an exten- extension module sion module is required. Now, in the extra configuration, boiler 3 is assigned the boiler temperature sensor, the first burner stage, the boiler pump and the shutoff valve.
  • Page 21 Depending on the type of plant, it may be practical to use a second RMK770 controller Variant with a second RMK770 with the third boiler. On that second RMK770, select basic type K and – in the extra configuration – assign boiler 3 the plant components boiler temperature sensor, burner stage 1, boiler pump and shutoff valve.

  • Page 22: Entering The Commissioning Mode

    Entering the commissioning mode During commissioning, the plant’s control and safety functions remain deactivated. The relays maintain their normal position, which means that their normally open contacts are open. When supplying power to the controller for the first time, the Language menu appears. Here, the language for commissioning and plant operation can be selected.
  • Page 23 The plant type is made up of a 2-digit number, e.g. K2.3: Plant type • The first digit defines the type of hydraulic circuit of the boiler sequence • The second digit defines the type of burner or the type of burner control: −...
  • Page 24 K4.x K5.x K6.x 24/232 Building Technologies Boiler Sequence Controller RMK770 CE1P3132en HVAC Products 3 Commissioning 23.04.2009...
  • Page 25 Plant types and Controller Extension modules Plant type module assignment RMK770 RMZ789 RMZ787 RMZ789(2) With main pump, no shutoff valve, no boiler pump 1-stage burner K1.1 K1.2 2-stage burner K1.3 Modulating burner, 3-position With main pump, with shutoff valve, no boiler pump 1-stage burner K2.1 K2.2...
  • Page 26 Bo2.TBo Bo1.TBo MnPu Bo2.BuSt1 Bo1.BuSt1 Bo2.BuSt2 Bo1.BuSt2 TMnFl Bo2.BoPu_A Bo1.BoPu_A Bo2.VlvShOff Bo2.VlvShOff TMnRt TMnFl Main flow temperature sensor TMnRt Main return temperature sensor Bo1.TBo Boiler 1, boiler temperature sensor Bo1.TRtBo Boiler 1, boiler return temperature sensor Bo2.TBo Boiler 2, boiler temperature sensor Bo2.TRtBo Boiler 2, boiler return temperature sensor Bo1.BoPu...
  • Page 27 Plant types K1.1, K1.2, K2.1, K2.2 K1.x C E - K1.x and K2.x C E + RMK770 Q 12 Q 14 Q 24 Q 34 Q 42 Q 44 Q 54 Q 64 Q 74 Q 11 Q 23 Q 33 Q 41 Q 53 Q 63...
  • Page 28 Plant types K3.1, K4.1, K4.2: K3.x C E - K3.x and K4.x C E + RMK770 Q 12 Q 14 Q 24 Q 34 Q 42 Q 44 Q 54 Q 64 Q 74 Q 11 Q 23 Q 33 Q 41 Q 53 Q 63...
  • Page 29 Plant type K5.x K5.1 K5.x C E - C E + RMK770 Q 12 Q 14 Q 24 Q 34 Q 42 Q 44 Q 54 Q 64 Q 74 Q 11 Q 23 Q 33 Q 41 Q 53 Q 63 Q 73 RMK770...
  • Page 30 Plant type K6.x K6.1, K6.2: K6.x C E - C E + RMZ789 RMK770 Q 12 Q 14 Q 24 Q 34 Q 42 Q 44 Q 54 Q 64 Q 74 Y 1 4 Y 2 4 Q 14 Q 11 Q 23 Q 33...

  • Page 31: Terminal Assignment And Properties Of Outputs

    3.3.2 Terminal assignment and properties of outputs In principle, all input and output terminals can be freely used. The terminals preas- signed when selecting the plant type can also be reconfigured. In that case, however, the special properties of the individual extension modules, and their outputs, must be taken into consideration.

  • Page 32: Short Designations For Basic Module And Extension Modules

    3.3.3 Short designations for basic module and extension modules The following short designations are used for the basic module and the extension modules: Short designation Type of module Basic module RMK770 Extension module RMZ785 Extension module RMZ787 Extension module RMZ788 Extension module RMZ789 A9(1) First extension module RMZ789...
  • Page 33 The configuration diagram shows all function blocks active in the plant type. In this Function blocks example, they are the following function blocks: • Boiler sequence manager • Boiler 1 • Boiler 2 The configuration diagram shows the inputs and outputs that are preconfigured. Inputs and outputs If required, additional inputs and outputs (e.g.

  • Page 34: Extension Modules

    It is possible to reconfigure or remove preconfigured inputs and outputs. If, for example, the second burner stage is removed from boiler 1 (--- in place of N.Q3), the burner of boiler 1 becomes a 1-stage burner. Further function blocks can be activated via the extra configuration. Function blocks Auto Heating circuit...
  • Page 35 A maximum of 3 extension modules can be fitted. The number of extension modules of Number of extension the same type is not limited. modules The assignment of functions to the basic module and the extension modules is not Assignment of prescribed.

  • Page 36: Extra Configuration

    If the extension modules actually used and their positions do not agree with the values Fault handling on the controller list, a fault status message ”Fault extension module” is delivered. In the case of an incorrectly configured extension module, some other fault status message may also be displayed because that consequential fault has the higher priority than fault status message 7101.

  • Page 37: Hydraulics-Dependent Inputs And Outputs Of Function Block "Boiler Sequence Manager

    3.4.1 Hydraulics-dependent inputs and outputs of function block “Boiler sequence manager” Boiler sequence management MnPu_A TFlPrCtr PrCtrVlvMx TPu_A MnPu_B TPu_B BuMnSt BuMdltUp BuSt1 TRtPrCtr BuMdltDn BuSt2 TRtBo TMnFl TRtBo BoPu_B BoPu BoPu_A TRtMx TRtCo TRtMn VlvShOff VlvRtMx MnVlvRtMx The sensors and actuating devices in the highlighted part belong to function block “Boiler sequence manager”.

  • Page 38: Hydraulics-Dependent Inputs And Outputs Of Function Block "Boiler

    The return sensor on the consumer side can be used for frost protection for the plant. Consumer return sensor (TRtCo) Common main pump A (the menu item does not show designation ”A“). Main pump A (MnPu_A) Common main pump B if the common main pump is a twin pump. Main pump B (MnPu_B) Common 3-position or modulating mixing valve for minimum limitation of the boiler Maintained boiler...

  • Page 39: Hydraulics-Dependent Inputs And Outputs Of Function Block "Precontrol

    The boiler temperature sensor is used as a control sensor for the boiler temperature Boiler sensor (TBo) setpoint. It is mandatory for minimum and maximum limitation of the boiler temperature and for modulating burners. The boiler return temperature sensor is used as a control sensor for maintained boiler Return sensor (TRtBo) return temperature with mixing valve.

  • Page 40: Hydraulics-Dependent Inputs And Outputs Of Function Block "Heating Circuit

    Main menu > Commissioning > Extra configuration > Primary controller > Outputs Operating line Range Name Mixing valve 3-pos PrCtrVlvMx Mixing valve modulating PrCtrVlvMx System pump RMK770…, RMZ7…* TPu_A System pump B TPu_B * Here, the free outputs are available for selection Flow temperature sensor in the primary controller loop.

  • Page 41: Miscellaneous

    Main menu > Commissioning > Extra configuration > Heating circuit > Outputs Operating line Range Name Mixing valve 3-pos HCtrVlvMx Mixing valve modulating HCtrVlvMx Heating circuit pump RMK770…, RMZ7…* HCtrPu Heating circuit pump B HCtrPu_B * Here, the free outputs are available for selection Function block “Heating circuit”...

  • Page 42: Faults

    Here, an outside sensor can be configured. That sensor can be used for both the Outside sensor heating circuit and the boiler sequence manager. Digital input for activating the “Special day” function. Special day input Digital input for activating the “Holidays” function. Holidays input Here, 4 universal inputs for display purposes can be configured.
  • Page 43 With the analog inputs, the following settings can be made: Analog inputs • Type • Measuring range • Measured value correction Temperature sensor LG-Ni1000 is preselected as standard for all types of temperature sensors. The following types of input signals can be handled: Type •...

  • Page 44: Several Boiler Sequence Controllers Rmk770

    The digital inputs can accept signals from potential-free contacts for control functions. Digital inputs Main menu > Commissioning > Extra configuration > Miscellaneous > Input identifier Configuration of input Operating line Setting N.X5 Digital Normal position The normal position can be predefined for each digital input. Main menu >...

  • Page 45: Wiring Test

    Common plant components (main pump, system pump, primary controller) must also be connected to the controller with the boiler master. If in total more than two boilers are in operation, the number of boilers must be set on the boiler master. Main menu >...

  • Page 46: Completing Commissioning

    Completing commissioning If the application is correct, the Commissioning menu can be quit as follows: Press the ESC button. The display shows a dialog box with the following information: Caution! Plant starts Confirm by pressing the OK knob. Then, the controller starts using the settings made;...

  • Page 47: Leaving The Password Level

    Main menu > Device information > Position 1 or 2 or 3 Operating line Remarks Extension module Display of the module’s type reference Software version Display of software version Hardware version Display of hardware version 3.10 Leaving the password level On completion of commissioning, select the user level (access level for the plant opera- tor).

  • Page 48: Plant Types And Default Terminal Assignments

    3.12 Plant types and default terminal assignments Note The terminal markings used are explained at the end of this section. K1.1 N.Q7 N.X1 N.X6 N.X3 N.Q2 N.Q5 N.X2 K1.2 N.Q7 N.X1 N.X3 N.X6 1. 2. 1. 2. N.Q2 N.Q5 N.Q3 N.Q6 N.X2 K1.3...
  • Page 49 K2.2 N.Q7 N.X1 N.X3 N.X6 1. 2. 1. 2. N.Q2 N.Q5 N.Q3 N.Q6 N.Q1 N.Q4 N.X2 K2.3 N.Q7 N.X1 N.X3 N.X6 N.Q2 N.Q5 A9.Q1 A9.Q3 A9.Q2 A9.Q4 N.Q1 N.Q4 N.X2 K3.1 N.Q7 N.X1 N.X3 N.X6 N.Q3 N.Q6 N.Q2 N.Q5 N.Q1 N.Q4 N.X2 K3.2...
  • Page 50 K4.1 N.X1 N.X3 N.X6 N.Q2 N.Q5 N.Q4 N.Q1 N.X2 K4.2 N.X1 N.X3 N.X6 1. 2. 1. 2. N.Q2 N.Q5 N.Q3 N.Q6 N.Q4 N.Q1 N.X2 K4.3 N.X1 N.X3 N.X6 N.Q2 N.Q5 A9.Q1 A9.Q3 A9.Q2 A9.Q4 N.Q1 N.Q4 N.X2 K5.1 N.X1 N.X3 N.X6 N.Q2 N.Q5...
  • Page 51 K5.3 N.X1 N.X6 N.X3 N.Q2 N.Q5 A9.Q1 A9.Q3 A9.Q2 A9.Q4 N.Q3 N.Q6 N.Q1 N.Q4 N.X2 K6.1 N.X1 N.X6 N.X3 N.Q2 N.Q5 N.X7 N.X4 N.Q1 N.Q4 A9.Q3 A9.Q1 A9.Q4 A9.Q2 N.X2 K6.2 N.X1 N.X3 N.X6 1. 2. 1. 2. N.Q2 N.Q5 N.Q3 N.Q6 N.X7...

  • Page 52: General Settings

    General settings Time of day and date 4.1.1 Operating principle The controller has a yearly clock with time of day, weekday and date. The following time formats are available: Time format Time format Date Example Time of day Example 24 hours dd.mm.yyyy 31.05.2004 hh:mm...

  • Page 53: Fault Handling

    If the controller is set as a clock time slave, it can also be selected whether it shall be possible to adjust the master clock’s time of day from this controller. The following remote settings for the clock time slave are possible: •...

  • Page 54: Selecting The Language

    Selecting the language Every RMK770 controller has a number of languages loaded. When switching on the controller for the first time, the required language must be entered. But the language can also be changed later during operation. Depending on the type of controller, the following languages with the relevant instruc- tions are available: Product no.

  • Page 55: Aggregate Names

    4.5.2 Aggregate names Aggregates boiler 1…6, primary controller, heating circuit and time switch can be given dedicated names. The setting is made on the relevant aggregate. Setting (example Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler 1 for boiler 1) Operating line Range...

  • Page 56: Resetting Text Entries

    4.5.5 Resetting text entries The following datapoints cannot be reset: • Device name • File name • Business card line 1…4 All the other texts entered by the user, such as menu texts, fault texts, etc. can be reset at the password level: Main menu >...

  • Page 57: General Functions, Fundamentals

    General functions, fundamentals Time switch A time switch is available for the heating circuit. In “Automatic” mode, the heating circuit, operates according to that time switch. A switching program can be defined for each day of week. Using the program entered, the time switch controls the change of operating modes and the associated setpoints.

  • Page 58: Entering The 24-Hour Program For Space Heating

    5.1.2 Entering the 24-hour program for space heating For space heating, an individual 24-hour program can be selected for every day. Main menu > Heating circuit > Time switch Space heating Operating line Factory setting Monday through Sunday Comfort / Precomfort / 06:00 Comfort Economy 22:00 Economy...

  • Page 59: Fault Handling

    5.1.3 Fault handling For each "Geographical zone", only one time switch master may be used. If several controllers are parameterized as the master, a fault status message is delivered. The message is sent by the controller which receives 2 time switch signals. Fault status messages Number Text...

  • Page 60: Holidays

    Entry Effect Diagram Slave The holidays / special day program in this controller is not active. The program acting is the external holidays / special day program that has the same holi- days / special day zone set. The external holiday / special day program must be set as the master holidays / special day program Master...

  • Page 61: Calendar Entry

    5.2.4 Calendar entry A maximum of 16 entries can be made. The entries are sorted in chronological order. Every entry must include: • Date, year and starting time • Date and end time • Reason for entry (holidays or special days) Main menu >...

  • Page 62: Fault Handling

    If other controllers are configured as slaves in the same holidays / special day zone, the Note digital inputs act on all these controllers also. 5.2.6 Fault handling Per holidays / special day zone, only 1 master can be set. If there is more than 1 mas- ter in a zone, fault status message ”>1 hol/spec day program”...

  • Page 63: Pump Overrun And Mixing Valve Overrun

    Sequence of functions The sequence of frost protection for the plant is as follows: ON/OFF Outside temperature Pump Diagram <–5 °C (TO Permanently on –4…+2 °C On for 10 minutes every 6 hours ON/OFF >2 °C (TO Permanently off Adjustable are the following temperatures: •...

  • Page 64: Heat Demand And Load Control

    To prevent the pumps and valves from seizing, a point in time (kick day and kick time) can be defined at which the pumps are put into operation and the valves are driven to their fully open and fully closed positions. The function can be deactivated (pump / valve kick = ---).

  • Page 65: Load Control

    Example 2: Heat source, primary controller and heat consumer Heat consumer / Heat primary controller source Heat Heat consumer consumer Heat Heat consumer consumer The heat demand signals can be assigned a priority. If, for example, DHW heating is operated with absolute priority, its heat demand signal must be given priority.

  • Page 66: Mixing Valve Control

    no more heat. Overrun is typically triggered by a boiler after the burner has shut down in order to prevent overtemperatures in the boiler. On the heat consumers, it can be selected if and to what extent they shall respond to the different load control signals.

  • Page 67: Setting Aids

    To enable a mixing circuit to control its flow temperature to the setpoint, it requires a higher flow temperature on the inlet side. This elevated temperature can be adjusted separately for each mixing circuit. In the case of maintained boiler return temperature with mixing valve, this elevated temperature is not needed.
  • Page 68 P-band Xp = 2 × Tu / Tg × Δ Δy × 100% ˜ 2 × Tu / Tg × Ksmax Setting rules Integral action time Tn = 3 × Tu Δ Example Change of valve position y = 40% Change of flow temperature Δ...

  • Page 69: Control Signal

    The actuator running time must be matched to the type of actuator used. Actuator running time This setting is important for both 3-position and DC 0…10 V actuators. If in doubt with 3-position actuators, the setting is to be increased since otherwise the actuator will not optimally operate in the range between 0 and 100% stroke (also refer to synchronization pulse in subsection 5.7.3 “Control signal”).

  • Page 70: Pump Supervision And Twin Pumps

    Main menu > …. > Inputs/setpoints > Display values Operating line Remarks Optg hours pump 0…99'999 h Optg hours pump B 0…99'999 h Setting values Main menu > …. > Inputs/setpoints > Operating line Range Factory setting Optg hours pump 0…99'999 h Optg hours pump B 0…99'999 h...

  • Page 71: Changeover Logic

    Main menu > Commissioning > Settings > … or Setting Main menu > Settings > Boiler sequence manager > Twin pump Main menu > Settings > Boiler … > Twin pump Main menu > Settings > Primary controller > Twin pump Main menu >...

  • Page 72: Overload Message And Supervision Of Flow

    The pump kick acts as follows, depending on the priority of changeover: Pump kick Operating state of the Impact of pump kick pumps With automatic changeover With fixed assignment Both pumps do not Kick first acts on the pump that Kick first acts on the re- run (summer opera- was in operation last...

  • Page 73: Boiler Sequence Management

    Boiler sequence management Overview of function block Auto BS Release HD (DC 0…10 V) HD gen. HD DHW Auto HD Frost MnPu_A PMaxMon WLoLeDet MnPuErFlow MnPuEr_A MnPu_B MnPuEr_B TMnFl TRtMx PMinMon TMnRt TRtCo MnVlvRtMx 73/232 Building Technologies Boiler sequence controller RMK770 CE1P3132en HVAC Products 6 Boiler sequence management...

  • Page 74: Configuration

    TMnFl TMnRt TrtMx BSM * TRtCo HD DC 0…10 V HD gen. MnPu_A HD DHW MnPu_B HD Frost Rel_ BS MnVlvRtMxUP BSS1 BSS2 MNVlvRtMxDN BSS3 MnVlvRtMx DC 0…10 V MnPuEr_A MnPuEr_B MnPuErFlow Er1 (WLoLeDet) Er2 (PMaxMon) Er3 (PMinMon) BSM * = boiler sequence manager Inputs: Outputs: TMnFl...
  • Page 75 If there is no main flow temperature sensor, the following configuration adopts the meas- ured value inside the controller from the boiler sensor of the current lead boiler: Main menu > Commissioning > Extra configuration > Boiler sequence manager > Inputs > Main flow sensor: autonomous This variant can only be used with dual-boiler plant.
  • Page 76 Main flow and main return temperature sensor TMnFl TMnFl TMnRt TMnRt Startup and part load operation (m < m Setback operation (m = 0) Usually, the main flow temperature TMnFl is a mixture of heating circuit return tempera- ture and boiler temperature. The level of mixing depends on the water volumes on the boiler and consumer side.

  • Page 77: Boiler Sequence Management

    Boiler sequence management 6.3.1 Concept TBo2 TBo1 MnPu_A MnPu_B TMnFl TRtMx TMnRt TRtCo MnVlvRtMx With the signal received from the main flow temperature sensor, the boiler sequence manager controls the individual boilers or burner stages of the boiler sequence. It decides on the release of a boiler, predefines the boiler temperature setpoint for the boilers released and, in addition, releases the individual burner stages depending on heat demand.

  • Page 78: Orders For Boilers To Be Switched On And Off

    6.3.2 Orders for boilers to be switched on and off As a general rule, the boilers are switched on in ascending order and switched off in descending order: 1 – 2 – 3 – 4 – 5 – 6 However, various functions, settings and signals at the control inputs can impact this order.
  • Page 79 Auto 1 Position 1 Auto Position 2 Boiler 1 Position 3 Boiler 2 Position 4 Boiler 3 Position 5 Boiler 4 Position 6 Boiler 5 Position 7 Boiler 6 Automatic boiler In Auto position, the lead boiler and the associated boiler sequence can do an auto- changeover matic changeover depending on the burner hours run of the lead boiler.
  • Page 80 To make certain that changeover to another lead boiler does not take place at an awkward point in time (e.g. on a weekend), the time of changeover (weekday, time of day) can be set. On completion of the period of time set (see settings above), the next boiler is selected as the lead boiler.

  • Page 81: Boiler Sequence Order

    If required, a boiler can be locked depending on the outside temperature. Locking of boiler depending on the Main menu > Commissioning > Settings > … or outside temperature Main menu > Settings > Boiler … > Operation settings Operating line Range Factory setting Boiler lock outside temp >...
  • Page 82 Boiler sequence with 4 boilers and 2-stage burners as an example. Lag boilers with Example great setpoint increase. Heat demand or load Burner stage in continuous operation Burner stage cycling Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler … > Operation settings Operating line Range Factory setting...

  • Page 83: Boiler Sequence Operating Mode

    This approach can be chosen only if the output of the basic stage of boiler 2 exceeds the rated capacity of boiler 1. If this strategy is chosen, a fixed boiler sequence makes sense, thereby ensuring that the same boiler is always boiler no. 2. Output stage Boiler release 1.1+1.2...
  • Page 84 The available boiler operating modes are “Off“, “Summer operation“ and “Auto“. In “Off“ mode, the only heat requests considered are emergency requests (e.g. ”Frost prot request 2-position” at the heat request input). During “Summer operation“, the only heat requests accepted are those from DHW heating (digital input or via KNX bus).

  • Page 85: Sustained Mode

    On the basis of the plant’s layout, the number of boilers required for heat generation in Summer operation the summer are usually known (e.g. for DHW heating). If the “Summer operation“ state is active in the boiler sequence manager, the number of boilers released can be limited. Main menu >...
  • Page 86 The moment an additional boiler is switched on, the flow temperature can drop for some time if the boiler was started up from “cold“. To prevent this undershoot from instantly switching on another boiler, a waiting time can be set before performance of the integral is started (TiDly, upward sequence delay).
  • Page 87 Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler sequence manager > Control parameters Operating line Range Factory setting Downward sequence integral 0…500 K×min 50 K×min The switching off of a boiler can be impacted by the switch-off integral. A small switch-off integral means that removal of a boiler from the boiler sequence is fast.
  • Page 88 Example The diagram above shows an example with 4 modulating boilers that are sequentially switched on and off. The basic stage of the first boiler be 30% of the rated capacity. As heat consumption increases, each boiler modulates up to 100 kW (100%) before the next boiler is switched on.

  • Page 89: Supervision Of Faults

    Supervision of faults The main pump (main twin pump) can be monitored with an overload input each and/or Supervision of a flow switch each (… Extra configuration > Boiler sequence manager > Inputs). main pump The parameters for the pump or twin pump fault inputs are fixed and cannot be changed.
  • Page 90 Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler sequence manager > Fault settings > Fault input 3 Operating line Range Factory setting Fault text A…Z Underpressure Impact of fault Stop / No stop Stop Fault acknowledgement None / Acknowledge /...

  • Page 91: Heat Demand And Heat Request

    The other sensors, which also belong to function block “Boiler sequence manager“, Sensor supervision such as the return sensor for the common maintained boiler return temperature, or the in general return sensor for the consumers, are monitored for short-circuit and open-circuit. Number Text Effect...

  • Page 92: Heat Request Modulating

    The three 2-position heat requests differ in the type of heat request. Depending on the selection of the boiler sequence operating mode (… > Main menu > Boiler sequence manager > Boiler sequence optg mode > Preselection), either all 3 types are evaluated or only individual ones.

  • Page 93: Heat Demand Transformers

    Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler sequence manager > Demand control Main menu > Settings > Primary controller > Demand control Operating line Range Factory setting [Curvepoint 1] outside temp –50…50 °C –10 °C [Curvepoint t 1] flow temp 0…140 °C...

  • Page 94: Maximum Limitation Of The Flow Temperature Setpoint

    Minimum limitation of the Minimum limitation of the return temperature return temperature with with common mixing valve separate mixing valve per boiler Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler sequence manager > Limitations Operating line Range Factory setting...

  • Page 95: Frost Protection

    6.6.3 Frost protection For more detailed information, refer to subsection 7.9.9 “Frost protection for the boiler”. Boiler frost protection Main menu > Commissioning > Settings > … or Plant frost protection Main menu > Settings > Boiler sequence manager > Limitations Operating line Range Factory setting...
  • Page 96 Info page “Boiler sequence manager“ shows the relevant temperatures of the boiler sequence. The info page(s) “Boiler …“ show(s) the relevant temperatures and setpoints of the boiler as well as the state indicating whether the boiler is released. For detailed diagnostics, the following additional information is provided: Main menu >...

  • Page 97: Fault Handling

    Operating line Range Fault text for fault input 3 Fault text 0 / 1 (1 = fault) Fault input 3 0 / 1 (1 = overload) [Main pump] overload 0 / 1 (1 = overload) [Main pump B] overload 0 / 1 (0 = no flow) Flow signal pump 0…99999 h Optg hours pump...
  • Page 98 Number Text Effect Main flow temperature 2396 Main flow temp not reached Nonurgent, must be acknowledged, no supervision plant stop Sensor supervision Number Text Effect [Boiler seq] MBRT sensor Nonurgent message; must be acknowl- general error edged, no plant stop Consumer return sensor Nonurgent message;...

  • Page 99: Boiler Control

    Boiler control Overview of function block PMaxMon(Er2) WLoLeDet(Er1) BuSt1 BuFb BuSt2 BuMdltFb BuMdltUp ErBu BuMdltDn BuMdlt_0…10 V TRtBo BoSetpt BoPuEr_A BoPu_A BoPuEr_B BoPu_B BoPuErFlow PMinMon(Er2) VlvShOff VlvRtMxUp ShOffVlvFb VlvRtMxDn VlvRtMx_0…10 V 99/232 Building Technologies Boiler sequence controller RMK770 CE1P3132en HVAC Products 7 Boiler control 23.04.2009...
  • Page 100 ReleaseBo InIndOp InFgMsm BoCtrl BoPuEr_A BoPuEr_B BoPuErFlow Error BuSt1 ErBu BuSt2 BuFb BuMdltUp Er1 (WloLeDet) BuMdltDn Er2 (PMaxMon) BuMdltDn_DC 0…10 V BuSetpt Er3 (PMinMon) BoPu_A ShOffVlvFb BoPu_B VlvShOff BuFb VlvRtMxUp VlvRtMxDn ShOffVlvFb VlvRtMx_DC 0…10 V BuMdltFb Inputs: Boiler sensor TrtBo Return sensor Release Bo Release input...

  • Page 101: Configuration

    Configuration In the basic configuration, the function block is activated for the application. The type of Basic configuration burner and boiler hydraulics are preselected by choosing the plant type. For more detailed information, refer to section 3.3 “Basic configuration”. Main menu > Commissioning > Basic configuration Operating line Range Factory setting...
  • Page 102 Outputs Main menu > Commissioning > Extra configuration > Boiler … > Outputs Operating line Adjustable values / remarks Burner stage 1 Burner stage 2 Modulating burner 3-pos Modulating burner mod Setpoint compensation Boiler pump Boiler pump B Pump function Boiler pump or bypass pump Shutoff valve Maint boiler return temp 3-pos...

  • Page 103: Burner Types

    This terminal can be used for the burner fault status message. Fault burner Also refer to section 7.13 “Boiler faults”. For additional fault supervisions, there are 3 universal fault inputs available. Fault input 1…3 Also refer to section 7.13 “Boiler faults”. Fault input for supervision of the boiler pump Boiler pump overload Fault input for supervision of boiler pump B in the case of twin pumps.

  • Page 104: Boiler Hydraulics

    7.2.2 Boiler hydraulics The following pumps are usually present: Definition of pumps • One boiler pump per boiler • The main pump for all boilers It is also possible to use a boiler pump as a mixing pump or a combination of mixing pump and main pump.
  • Page 105 Y1 Y2 3 BuSt1 VlvShOff If the shutoff valve and the boiler pump are controlled by separate outputs, both boiler pump and burner are switched on only when the shutoff valve is fully open. If there is a checkback signal from the shutoff valve, it must be configured to input “Checkb signal shutoff valve”.

  • Page 106: Additional Boilers

    Additional boilers The basic configuration is used to activate 2 boilers for the boiler sequence. If additional boilers are required, they must be configured in the extra configuration. By assigning a burner stage, the setpoint compensation or a pump to a boiler, the function block of the respective boiler is activated.

  • Page 107: Individual Operation

    • Setting ”Off“: The boiler also remains off in the event of risk of frost • Setting “On“: The boiler is put into operation to ensure frost protection Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler … > Limitations Operating line Range Factory setting...

  • Page 108: Test Mode And Commissioning Aids

    Test mode and commissioning aids During commissioning and for test purposes, boiler and burner can be put into various operating states via the service level. Main menu > Boiler … > Test mode Operating line Range Factory setting Auto / Boiler off / Auto Preselection test mode Stage 1 controlled /...

  • Page 109: Control Of The Burner

    The boiler is released and the burner with its stages 1 and 2 or basic stage and modu- Stages 1 + 2 controlled lating part maintains the adjusted test mode setpoint. The boiler is released and the modulating burner operates at the modulation level Modulating fixed according to the setting made.

  • Page 110: 2-Position Control Of 2-Stage Burners

    If the switch-off point is reached before the minimum burner running time is completed, Minimum burner running the burner remains in operation until that time has elapsed (burner cycling protection). time, burner cycling The minimum burner running time is given priority. The burner’s switch-off point is protection raised by half the boiler’s switching differential.
  • Page 111 The release logic for 2-stage burner operation aims at ensuring an optimum switch-on Burner stage 2 time for stage 2 which, in addition to a time criterion, also considers the amount of the heat deficit, calculated with a temperature-time integral. Time criterion As soon as the burner’s basic stage is switched on, the minimum locking time for burner stage 2 starts to run.

  • Page 112: Control Of Modulating Burners

    Owing to the performance of the temperature-time integral, it is not only the period of time that is considered, but also the extent of overshoot. This means that when the overshoot is significant, burner stage 2 is locked earlier. When the reset integral (area “b”...
  • Page 113 When the demand for heat is small, the basic stage cycles. When the demand for heat increases, the 3-position output or a DC 0…10 V output is used to control the combus- tion air damper. At the same time, the amount of fuel supplied is also increased, typically via an addi- tional switch on the air damper, or by simultaneous control of the amount of fuel (gas / fuel ratio).
  • Page 114 TBoSp+SDBo TBoSp+½ SDBo TBoSp TBoSp-½ SDBo Basic Modulat. Release integral for modulation Release integral modulation (release integral stage 2 with 2-stage burner) Reset integral modulation (reset integral stage 2 with 2-stage burner) Neutral zone On/off pulses SDBo Boiler switching differential St Basic Burner’s basic stage St Modul.
  • Page 115 The proportional band has an impact on the controller’s proportional behavior. Proportional band Xp With a setpoint / actual value deviation of 20 K, a setting of Xp = 20 K produces a manipulated variable corresponding to the damper actuator’s running time. The integral action time has an impact on the controller’s integral behavior.

  • Page 116: External Burner Control

    If the control’s response is too ”hefty” so that it overshoots or starts oscillating, setting Control action is parameters Xp, Tn and Tv must be increased in a stepwise fashion. A new readjust- too fast ment should be made only after the control action resulting from the previous readjust- ment is completed.

  • Page 117: Maximum Limitation Of The Boiler Temperature

    7.9.1 Maximum limitation of the boiler temperature This setting provides maximum limitation of the boiler temperature setpoint. For burner control, this value represents the switch-off point. In this range, the boiler’s switching differential is calculated downward. Maximum limitation of the boiler temperature is always active. The only exception is the wiring test.

  • Page 118: Optimization Of The Minimum Boiler Temperature

    In case of plants with mixing valve for the maintained boiler return temperature, the protective boiler startup function is provided by the mixing valve. In that case, no lock- ing signals for the protective boiler startup is generated. Boiler pump It can be selected whether or not the boiler pump shall be switched off when protective boiler startup is active (pump off).

  • Page 119: Protection Against Boiler Overtemperatures

    Without boiler shutdown Using this setting, the boiler is always maintained at the minimum boiler temperature. When using this setting, the boiler is operated at the minimum boiler temperature Automatic boiler shutdown whenever there is a heat request from one of the heat consumers. When there is no heat request, the boiler temperature can drop below its minimum.

  • Page 120: Protection Against Pressure Shocks

    7.9.10 Protection against pressure shocks Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler … > Limitations Operating line Range Factory setting Delta boiler temp max (stage 2) 0…10 K To prevent pressure shocks in the gas network if stages 1 and 2 switch off at the same time, stage 2 is already switched off before the maximum boiler temperature is reached the difference being the setting value “Boiler temp max”...
  • Page 121 Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler > Limitations Operating line Range Factory setting Bypass pump switching diff 1…20 K The bypass pump controls the return temperature in 2-position mode within the adjust- able switching differential.

  • Page 122: Flue Gas Temperature Supervision

    The terminals still available for selection are the free terminal pairs (Q1/Q2, Q3/Q4, Configuration of a pair of Q5/Q6) for the open and the close signal. Normally, special terminal pairs are required terminals for a 3-position for that purpose (RC units for radio interference suppression; for more detailed informa- mixing valve tion, refer to subsection 3.3.2 “Terminal assignment and properties of outputs”).

  • Page 123: Flue Gas Measuring Mode

    The maximum value is filtered to suppress faults. As a result, the maximum flue gas temperature rises at the rate of maximum 1 K/s. If a flue gas temperature limit value is parameterized, a fault status message is deliv- Supervision of the ered when the limit value is crossed.

  • Page 124: Boiler Faults

    7.13 Boiler faults If a boiler initiates lockout, it is shut down until the fault is rectified. A boiler is considered faulty if one of the following faults occurred: • Fault of burner • Fault of boiler pump • Fault of shutoff valve (no checkback signal) •...
  • Page 125 Main menu > Commissioning > Settings > … or Main menu > Settings > Boiler … > Fault settings > Checkb signal burner Operating line Range Factory setting Signal delay start 00.05…59.55 m.s 04.00 m.s Signal interruption operation 00.00…59.55 m.s 20.00 m.s Impact of fault No stop / Stop...

  • Page 126: Burner Hours Run Counter And Output Balance

    Main menu > Commissioning > Settings > … or Main menu > Settings > Inputs Operating line Range Factory setting Normal position Open / Closed Open Fault supervision For more detailed information, refer to section 5.8 “Pump control” boiler pump 7.14 Burner hours run counter and output balance...

  • Page 127: Fault Status Messages

    7.15 Fault status messages Note This section 7.15 shows the text for each fault number with which the controller is supplied. It can be changed on the password level. Fault boiler temperature Number Text (as supplied) Effect sensor [Boiler 1] boiler sensor Urgent message;...
  • Page 128 Fault burner Number Text (as supplied) Effect 2301 [K1 burner] fault Urgent message; acknowledgement can be parameterized; factory setting: “Acknowl- edge“. Boiler stop 2302 [K2 burner] fault Urgent message; acknowledgement can be parameterized; factory setting: “Acknowl- edge“. Boiler stop 2303 [K3 burner] fault Urgent message;...
  • Page 129 Number Text (as supplied) Effect 2324 [Boiler 4] water shortage Priority, effect and acknowledgement can be parameterized. Supply state Urgent, boiler stop, must be acknowledged 2325 [Boiler 5] water shortage Priority, effect and acknowledgement can be parameterized. Supply state: Urgent, boiler stop, must be acknowledged 2326 [Boiler 6] water shortage...
  • Page 130 Number Text (as supplied) Effect 2344 [Boiler 4] underpressure Priority, effect and acknowledgement can be parameterized. Supply state: Urgent, boiler stop, must be acknowledged 2345 [Boiler 5] underpressure Priority, effect and acknowledgement can be parameterized. Supply state: Urgent, boiler stop, must be acknowledged 2346 [Boiler 6] underpressure...
  • Page 131 Overload boiler pump Number Text (as supplied) Effect 2401 [K1 pump] overload Nonurgent message; acknowledgement can be parameterized; factory setting: “Acknowl- edge“. No boiler stop 2402 [K2 pump] overload Nonurgent message; acknowledgement can be parameterized; factory setting: “Acknowl- edge“. No boiler stop 2403 [K3 pump] overload Nonurgent message;...

  • Page 132: Boiler Designations

    Flow fault boiler Number Text (as supplied) Effect 2431 Nonurgent message; must be acknowl- pump B [K1 pump B] no flow edged and reset. No boiler stop Nonurgent message; must be acknowl- 2432 [K2 pump B] no flow edged and reset. No boiler stop 2433 Nonurgent message;...
  • Page 133 Operating line Adjustable values / remarks Checkb sign shutoff valve 0 /1 (1 = checkback signal) 0 / 1 (1 = overload) [Boiler pump] overload 0 / 1 (1 = overload) [Boiler pump B] overload 0 / 1 (0 = no flow) Flow signal pump Optg hours pump 0…99999 h...

  • Page 134: Heat Demand And Heat Requests

    Heat demand and heat requests Heat requests The controller can receive heat requests: • From the internal heating circuit • From external controllers (KNX) via bus • As continuous DC 0…10 V signals • As 2-position signals Heat requests can be delivered either directly or via the primary controller. Primary controller direct...

  • Page 135: Weather-Compensated Setpoint For Boiler Sequencing

    Direct delivery is described in chapter 6 “Boiler sequence management” and delivery Notes via the primary controller in chapter 9 “Precontrol”. The special case of weather-dependent setpoint compensation for boiler sequencing is described in the following section. Weather-compensated setpoint for boiler sequencing There may be a need to operate the boiler sequence according to a weather- compensated setpoint without having a heating circuit.
  • Page 136 The heat demand transformer converts the position heat request signals (in %) to heat demand signals with a flow temperature setpoint. The following example of an air handling plant shows this. Example: Air handling plant Room unit Air supply area (in reference room) Ventilation Central...
  • Page 137 Adaptation of flow Flow temperature temperature Max. flow temp. (Curve point 1): readjustment Flow temp. (Curve point 2): Flow temp. (Curve point 1): (Curve point 2): Outside Outside temp. Outside temp. temperature The adaptation of the flow temperature can be set as follows: •...

  • Page 138: Precontrol

    Precontrol Overview of function block Primary controller Precontrol Flow temperature Return temperature Configuration Function block “Primary controller“ must always be activated in the extra configuration. Basic configuration The function block is activated by assigning an output to a terminal. Extra configuration Outputs Main menu >...

  • Page 139: Types Of Primary Controller

    Heat requests The heat requests can be received from other devices via bus. In addition, there are 3 binary inputs and 1 analog input for signalling heat requests. Types of primary controller If only a pump or twin pump is configured, the primary controller consists of system pump control.

  • Page 140: Plant Operation

    Plant operation Plant operation indicates whether the primary controller is switched on and whether the pump runs. Main menu > Primary controller > Plant operation Plant operation Operating line Range Factory setting Preselection Auto / Off* Auto State Off / On Cause Commissioning / Request /...

  • Page 141: Heat Request Modulating

    • Heat demand signals from individual room controllers for air heating coils • Heat demand signals from primary air handling plant A heat demand transformer converts the last 3 signals to a flow temperature setpoint. In addition, 3 digital and/or 1 analog input can be configured on the controller as heat request inputs.

  • Page 142: Heat Request 2-Position

    9.5.2 Heat request 2-position Main menu > Commissioning > Settings > … or Main menu > Settings > Primary controller > Demand control Operating line Range Factory setting [Curvepoint 1] outside temp –50…50 °C –10 °C [Curvepoint 1] flow temp 0…140 °C 70 °C [Curvepoint 2] outside temp...

  • Page 143: Control Of Mixing Valve

    Control of mixing valve 9.6.1 General Load control The thermal output of mixing valve control can be reduced by functions of a higher priority (e.g. limitation of the return temperature) or by functions of other plant (boiler, DHW heating) via load control. The following mixing valve settings are valid for both 3-position and DC 0…10 V actua- tors.

  • Page 144: Limit And Protective Functions

    Limit and protective functions 9.8.1 Frost protection Here, the setting is made whether or not function “Frost protection for the plant” shall Frost protection act on the pump for precontrol. for the plant For more detailed information about frost protection for the plant, refer to section 5.4 “Pump overrun and mixing valve overrun”.

  • Page 145: Limitation Of The Return Temperature

    Settings Main menu > Commissioning > Settings > … or Main menu > Settings > Primary controller > Limitations Operating line Range Factory setting Flow temperature max 0…140 °C 140 °C Flow temperature min ---- / 0…140 °C ---- °C Flow temperature rise max ---- / 1…600 K/h ---- K/h...

  • Page 146: Pulse Limitation

    TRtLim TOeff TrtLim Limit value of return temperature limitation Toeff Composite (effectively acting) outside temperature Curvepoint 1 Maximum limit value of the return temperature, effective at low outside temperatures Curvepoint 2 Minimum limit value of the return temperature, effective at high outside temperatures Special cases: Setting Effect...

  • Page 147: Pump Overrun And Mixing Valve Overrun

    Main menu > Commissioning > Settings > … or Settings Main menu > Settings > Primary controller > Limitations > Pulse limitation Operating line Range Factory setting Meter input ---- / 1…4 ---- Type of limitation Absolute / Scaled Absolute Limit value 5…4000 pulses/min 75 pulses/min...

  • Page 148: Fault Handling

    9.10 Fault handling Note This section 9.10 shows the text for each fault number with which the controller is supplied. It can be changed on the password level. When commissioning is completed ( Commissioning menu quit), the system checks Fault handling whether the configured sensors have been connected.
  • Page 149 Operating line Range [System pump B] overload 0 / 1 (1 = overload) Flow signal pump 0 / 1 (0 = no flow) Optg hours pump 0…99999 h Optg hours pump B 0…99999 h When making diagnostics or the wiring test, logic states are displayed. The input is active when 1 appears on the display.

  • Page 150: Heating Circuit Control

    Heating circuit control 10.1 Overview of function block Heating circuit Timer function Special day input Holidays input Heating circuit diagram HCtrVlvMx TFlHCtr HCtrPu HCtrPu_B TRtHCtr HctrPu Heating circuit pump HctrPu_B Heating circuit pump B HCtrVlvMx Heating circuit mixing valve TFlHCtr Flow temperature sensor Outside sensor Room temperature sensor...
  • Page 151 Using setting “Heating circuit = Active“, a virtual heating circuit can be activated, which Virtual heating circuit predefines heat demand according to the outside temperature or the heating curve (for that purpose, a measured value of the outside temperature must be available), without having this measured value available for the flow sensor and the actuating devices.

  • Page 152: 3-Position Or Modulating Mixing Valve

    10.2.1 3-position or modulating mixing valve Mixing valve control can be accomplished with a 3-position mixing valve or a mixing valve using DC 0…10 V control. The type of actuator is selected in the extra configuration. Extra configuration The output is activated via the extra configuration: Main menu >...
  • Page 153 Preselection Economy This operating mode is suited when the room is not occupied for a few hours or when a reduced room temperature is desired. Economy mode is usually selected for the night Protection With this operating mode, the room is heated only when there is risk of frost, which could lead to frozen pipes, etc.

  • Page 154: User Requests From The Room

    10.3.2 User requests from the room Overriding the The user is given a number of choices to override the current 24-hour program and to 24-hour program change the setpoint. Following can be used to override operation from the room: • Switches or buttons (directly connected) •...

  • Page 155: Timer Function

    10.3.4 Timer function Using a configured input, the pulse triggered via a button can be acquired to extend Comfort mode when in mode. The timer’s time can be adjusted. The timer function is immediately activated. 60 min 60 min 60 min Room operating mode according to the time switch Timer function Resultant room operating mode...
  • Page 156 RMK770 Synco™200 RLU2… Main menu > Commissioning > Extra configuration > Heating circuit > Outputs Configuration of the 2 operating mode relays Operating line Adjustable values / display / remarks Operating mode relay 1 --- / N.Q1…, etc. (free relays only) / Assign operating mode relay Operating mode relay 2 --- / N.Q1…, etc.

  • Page 157: Plant Operation

    10.3.6 Plant operation Plant operation indicates whether the heating circuit is switched on and whether the pump operates. Plant operation Main menu > Heating circuit > Plant operation Operating line Range Factory setting Preselection Auto / Off* Auto State On / Off Cause Commissioning / Frost protection for the room /...
  • Page 158 Priority Name Explanation Wiring test In the wiring test (highest priority), the plant compo- nents can be directly controlled, independent of all other settings The controller-internal safety functions will be overridden! Plant operation selector The plant operating mode selector has the second highest priority and can only be overridden by the controller’s frost protection External master...

  • Page 159: Room Temperature Setpoints

    Priority Name Explanation The current time program can be overridden by Presence and timer presence button or timer button button The timer button at digital input (or of a third- party KNX device) can also override the room operating mode. If 2 or more functions are triggered, the function activated last prevails.

  • Page 160: Increasing The Economy Setpoint

    10.4.2 Increasing the Economy setpoint The room temperature setpoint of Economy mode is increased depending on the composite outside temperature. The increase is greater at low outside temperatures and zero at high outside temperatures; the transitions are adjustable. The function helps prevent peak loads when changing from Economy to Precomfort or Comfort mode.
  • Page 161 +10 K Setpt C H Cmf -10 K z.B. / e.g.: Setpt C Prt 32 °C Setpt C Eco 28 °C 25 °C Setpt C PreC 23 °C Setpt C Cmf Setpt H Cmf 21 °C Setpt H PreC 19 °C Setpt H Eco 16 °C Setpt H Prt...

  • Page 162: Room Temperature Setpoint Adjuster, Relative

    The Economy setpoints are shifted only if, otherwise, the Precomfort setpoints would Impact on the Economy lie outside the Economy setpoints (also refer to the diagram above). setpoint The input is activated via the extra configuration: Extra configuration Main menu > Commissioning > Extra configuration > Heating circuit > Inputs > Room setpoint adjuster absolute Assign terminal Main menu >...

  • Page 163: The Composite And The Attenuated Outside Temperature

    To determine the heating limit (summer / winter operation), the attenuated outside Attenuated outside temperature temperature is required (refer to section below). The heating curve is defined by the 2 curvepoints at the design temperature and the Heating curve theoretical heating limit. Heat transmission in the space is not linear, however. When the difference between flow temperature and room temperature is small, the rate of heat transmission diminishes.

  • Page 164: Heating Curve

    ToStrDmp Toeff Settings Main menu > Commissioning > Settings > … or Main menu > Settings > Heating circuit > Space heating Operating line Range Factory setting Building time constant 0…100 h 20 h Heating curve Main menu > Settings > Heating circuit > Heating curve or Main menu >...
  • Page 165 With a radiator exponent nH between 1…1.5, the heating curve is only slightly deflected Inflection point and can therefore be replaced by linearized sections. This is achieved by setting an- other curvepoint, the so-called inflection point. The inflection point lies 30% below the outside temperature at which the flow tempera- ture setpoint is 20 °C and the outside temperature at curvepoint This means that curvepoint...

  • Page 166: Influence On The Flow Temperature Setpoint

    10.5.3 Influence on the flow temperature setpoint Basis for the flow temperature setpoint is the heating curve. In addition, the setpoint is influenced by the following variables: • Room setpoints • Actual value of the room temperature • Morning boost (refer to subsection 10.7.3 “Quick setback and boost heating”) Influence of the room The basic heating curve applies to a room temperature setpoint of 20 °C.

  • Page 167: Heating Limit Switch

    SpTFlDe TOeff SpTFlHi SpTRN TODe TOHi TOeff SpTR SpTR TR × V 20 °C Δ Rule of thumb Due to the room temperature deviation TV, the change of flow temperature setpoint corresponds roughly to the value of: Δ TFl= Δ TR ×...

  • Page 168: Mixing Valve Control

    • When all 3 temperatures lie 1 °C below the Comfort heating limit, heat is released in Comfort heating limit Comfort and Precomfort mode • When 1 of the 3 temperatures lies above the Comfort heating limit, the delivery of heat is locked ⇒...

  • Page 169: Load Control

    Main menu > Commissioning > Settings > … or Main menu > Settings > Heating circuit > Mixing circuit controller Operating line Range Factory setting Actuator running time 1…600 s 150 s P-band Xp 1…100 K 50 K Integral action time Tn 0…600 s 60 s For more detailed information about mixing valve control and its setting aids, refer to...

  • Page 170: Optimization Functions

    10.7 Optimization functions The optimization functions are activated or influenced by the following settings: Settings Main menu > Commissioning > Settings > … or Main menu > Settings > Heating circuit > Optimizations / Influences Operating line Range Factory setting Type of optimization With room model / With With room model...

  • Page 171: Otimum Start / Stop Control

    10.7.2 Optimum start / stop control The purpose of optimum start control is to reach a temperature level 0.25 K below the Optimum start control Comfort or Precomfort setpoint when occupancy according to the time program starts. For that, the heating circuit must be switched on at an earlier point in time. If a room temperature sensor is connected, the controller calculates the forward shift depending on the current room temperature.

  • Page 172: Limit And Protective Functions

    Room temperature If a room temperature sensor is connected, the actual value room temperature is used for aborting quick setback. If there is no sensor, the temperature of the room model is used to make the calcula- tion. In that case, the setback time depends on the outside temperature and the build- ing time constant.

  • Page 173: Return Temperature Limitation

    TRw + TR TRw + TR - TRSD Pump TRSD Temperature differential for switching the heating circuit off Δ TR Time Room temperature TRSD Temperature differential for switching the heating circuit on Room temperature setpoint Actual room temperature Main menu > Commissioning > Settings > … or Settings Main menu >...
  • Page 174 Main menu > Commissioning > Settings > … or Settings Main menu > Settings > Heating circuit > Limitations Operating line Range Factory setting [Curvepoint 1] outside temp –50…50 °C –11 °C [Curvepoint 1] return temp ---- / 0…140 °C ----°C [Curvepoint 2] outside temp –50…50 °C...

  • Page 175: Pulse Limitation

    10.8.3 Pulse limitation The heating circuit can accept pulses for limiting the output of heat or the volumetric flow. Prerequisite for pulse limitation is a heating circuit plant with mixing valve. The pulses are delivered via the meter inputs of function block “Meters”. For more Meter inputs detailed information about function block “Meters”, refer to chapter 11 “Data acquisi- tion“.

  • Page 176: Pump Overrun And Mixing Valve Overrun

    Setting --- deactivates the function. Δ Δ Maximum boost = Time Δ Unit of time TVw Flow temperature setpoint Δ TVw Rate of setpoint boost per unit of time Main menu > Commissioning > Settings > … or Settings Main menu > Settings > Heating circuit > Limitations Operating line Range Factory setting...

  • Page 177: Extra Functions

    The temperature request for the current heat demand is calculated based on the flow temperature setpoint of the heating circuit (refer to subsections 10.5.2 “Heating curve” and 10.5.3 “Influence on the flow temperature setpoint”) plus an adjustable setpoint increase for the mixing valve. Main menu >...
  • Page 178 The type of room temperature sensor can be selected (example with input terminal Type of sensor RMK770.X4): Main menu > Commissioning > Settings > … or Main menu > Settings > Inputs > RMK770.X4 > Type The following choices are available: •...

  • Page 179: Room Control Combination

    Variant Effect Diagram 2 room sensors or When communication is Synco 1 KNX room sensor and activated, the heating circuit 1 room unit QAW740* receives the room temperature of the same geographical zone. The heating circuit operates with the average of the 2 temperature signals received.
  • Page 180 Example with Problem: The basic load is covered by a heating circuit with weather-compensated control and 2 heating circuits the load-dependent part by a second heating circuit with or without room influence. The 2 heating circuits shall operate in parallel and be controlled by a common switching program or a room operating mode selector.

  • Page 181: Fault Handling

    Important The ventilation controller’s room temperature sensor must not be installed in the extract air duct! Otherwise, functions “Room temperature influence” and “Type of optimization” with room temperature may not be activated. 10.11 Fault handling As soon as commissioning is completed (by quitting the Commissioning menu), a check is made to see if the configured sensors are connected.

  • Page 182: Diagnostic Choices

    Number Text (as supplied) Effect Fault heating circuit pump 2521 Nonurgent message. Acknowledgement can [Heat circuit pump] be parameterized; factory setting: ”Acknowl- overload edgement“ 2522 Nonurgent message. Acknowledgement can [Heat circuit pump B] be parameterized; factory setting: ”Acknowl- overload edgement“ 2523 [Heat circuit pump] no Nonurgent message;...
  • Page 183 Main menu > Heating circuit > Outputs Outputs Operating line Adjustable values / remarks Mixing valve position 0…100% (3-position or modulating) Heating circuit pump Off / On Heating circuit pump B Off / On Heating limit relay Off / On Operating mode relay 1 Off / On Operating mode relay 2...

  • Page 184: Data Acquisition

    Data acquisition 11.1 Trend 11.1.1 Connections and use Trend Purpose Function block ”Trend” is used for time-related recording of measured values. It provides 4 independent trend channels. A trend channel can record 1 measured value. Each trend view can display 2 trend channels: Primary channel plus extra channel as a reference.

  • Page 185: Trend Function Settings

    11.1.3 Trend function settings Main menu > Settings > Data acquisition > Trend > Trend channel 1…4 Settings Operating line Adjustable values / remarks Trend channel 1… Channel name Trend channel 4 (editable text, max. 20 characters) Trend signal Assign trend signal: ---, room temperature via bus, outside temperature via bus, N.X1…A9(3).X4 Geographical zone...

  • Page 186: Fault Handling

    11.2 Fault handling Trend signal not available If a trend signal at the local inputs is no longer available (e.g. due to a faulty sensor), trends are no longer recorded. In this case, observe the fault status messages under: Main menu > Faults > Faults current If the values are not available via bus, trends are no longer recorded.

  • Page 187: Pulse Valency

    The pulse values represent: • Energy in kJ, MJ, GJ, Wh, kWh or MWh • Volume in m , l or ml • Variables without unit (max. 3 decimal places) • Heat cost unit • BTU (British Thermal Unit) The pulses are converted to consumption values as per the setting values, added, and the cumulated values are stored as 15-month values at midnight upon month rollover.

  • Page 188: Overflow Value

    Main menu > Commissioning > Settings or Pulse valency Main menu > Settings > Data acquisition > Meter 1 (or 2, 3 or 4 ) Operating line Range Factory setting Pulse unit Wh / kWh / MWh / kJ / MJ / GJ / ml / l / m3 / Heat cost unit / No unit / BTU...

  • Page 189: Assignment Of Texts

    11.3.7 Assignment of texts Each meter can be assigned specific text. This text appears on the operating pages in the form of menu text and datapoint text. Main menu > Commissioning > Settings … or Settings Main menu > Settings > Data acquisition > Meter 1 (or 2 , 3 or 4 ) Operating line Range Factory setting...

  • Page 190: Function Block "Miscellaneous

    Function block “Miscellaneous“ 12.1 Overview of function block Miscellaneous 12.2 Configuration Function block “Miscellaneous” is automatically provided for all basic types. To activate the function block, special basic configuration is not required. The functions required for the plants can be activated in the extra configuration. Extra configuration Inputs Main menu >...
  • Page 191 Connection choices The outside temperature can be delivered by different sources: • Locally connected to a terminal • Delivered via bus The following variants are available: Variant Effect Diagram Outside temperature Controller operates with its locally at terminal. own outside temperature. Communication outside No impact on the bus temperature not active...

  • Page 192: Outside Temperature Simulation

    12.3.1 Outside temperature simulation To test the response of the plant, an outside temperature can be simulated and the measured value of the outside temperature (outside sensor or bus) can be overridden. Main menu > Miscellaneous > Inputs Operating line Range Factory setting Outside temperature simulation...

  • Page 193: Display Inputs

    12.4 Display inputs On the RMK770, 4 universal inputs can be defined for display purposes. Main menu > Commissioning > Extra configuration > Miscellaneous > Inputs Operating line Adjustable values / remarks Display input 1 Assign terminal Display input 2 Assign terminal Display input 3 Assign terminal...

  • Page 194: Outside Temperature Relay

    12.5 Outside temperature relay Extra configuration The function must be activated via the extra configuration: Main menu > Commissioning > Extra configuration > Miscellaneous > Outputs > Outside temperature relay Assign terminal Settings Main menu > Commissioning > Settings > … or Main menu >...

  • Page 195: Function Block "Faults

    Function block “Faults“ 13.1 Overview of function block The task of function block “Faults” is to collect and evaluate all fault status messages, and to trigger appropriate actions to prevent damage to the building and plant. The function block is always active for internal fault status messages. In the extra configuration –...

  • Page 196: External Fault Button

    Indication Cause / procedure Button is not lit No fault present • There is a fault which has not been Button blinks acknowledged. After pressing the button, the button remains lit until the fault is rec- tified • There was a temporary fault which, at the moment, can be no longer detected, de- manding on acknowledgement which has not yet been made.

  • Page 197: Signal Priority

    These types of fault require an acknowledgement. Acknowledgement (standard fault) Example If a plant uses more than 1 time switch master in the same geographical zone, this fault status message must be acknowledged. There is an acknowledgement and a reset required for this type of fault. Acknowledgement and reset (extended fault) Example...

  • Page 198: State Diagrams Of The Individual Types Of Fault

    13.6 State diagrams of the individual types of fault A simple fault need not be acknowledged. If there is a fault relay (see below), it must be Simple fault reset, however. No fault (acknowledged) Fault coming Fault going Faulty (acknowledged) When there is a simple fault, the LED is lit.

  • Page 199: Predefined Fault Inputs

    Extended faults are faults that must be acknowledged and reset. This is the case with a Extended faults twin pump, for example, when both pumps signal a fault. The pumps start running again only after the fault has been acknowledged, corrected and reset. Aggregate or plant stopped LED lit LED flashes...
  • Page 200 Main menu > Commissioning > Settings > … or Main menu > Settings > Inputs > RMK770.D… (or RMZ78… ) Operating line Range Factory setting Normal position Open / Closed Open Following can be set for each fault status message: Main menu >...

  • Page 201: Analog Fault Input With Limit Value Supervision

    >1 fault input fault The fault with the highest priority is sent via KNX bus. If more than 1 fault input with priority “Urgent“ want to signal a fault, message ”>1 fault input faulty“ is delivered with the highest priority. Without this fault status message, the message from only 1 fault input would appear.

  • Page 202: Communication

    13.9 Communication When communication is activated, the impact on fault handling is as follows: • Fault status messages are always delivered via bus and can be further handled by other Synco™ 700 devices • Fault status messages from other Synco™ 700 devices are shown on the controller •...
  • Page 203 Setting values Main menu > Commissioning > Settings or Main menu > Settings > Faults > Fault relay 1 (or 2) Operating line Range Factory setting Fault priority Urgent / Nonurgent / All Indication of fault* Fault internal (optically) / Fault internal Fault internal (audibly) / (audibly)**...

  • Page 204: Display Of Faults

    13.11 Display of faults The current state of the fault status messages can be interrogated on the operator unit. Faults current The current faults include all faults currently pending. A maximum of 10 faults can be displayed. Following is displayed with every fault: •...

  • Page 205: Diagnostic Choices

    When making diagnostics or the wiring test, logic states are displayed. The input is active when 1 appears on the display. If “Normal position open“ is selected, this is the case when the contact is closed; if “Normal position closed“ is selected, this is the case when the contact is open.

  • Page 206: Communication

    Communication A detailed description of communication is given in Basic Documentation “Communica- tion via KNX bus” (P3127). In the following, the most important settings required for commissioning a multiboiler plant are described. Communication is activated when the following conditions are satisfied: Activating •...

  • Page 207: Calendar Data (Holidays And Special Days)

    RM.. RM.. Time of day Time of day Device 1 Device 2 Master Slave Legend for all figures in this Signal transmitter chapter: Signal receiver Effects when communication is activated: Remote reset of fault • Fault status messages are always delivered via bus and can be further handled by other Synco™...

  • Page 208: Room Data

    Holiday/special day Holiday/Special day Calendar operation: Master Calendar operation: Slave Calendar zone: 1 Calendar zone: 1 14.3 Room data Every heating circuit belongs to a geographical zone. The zone represents the room to be controlled. Within the zone, the data related to the room are exchanged: •...

  • Page 209: Settings On The Room Unit

    Time switch slave If the time switch shall operate as a slave of a master time switch, the geographical zone of the master time switch must be set here. If this is the case, no more time switch data are sent via the geographical zone. But the geographical zone is still required for communication with the room unit.

  • Page 210: Heat Distribution Zones

    The boiler sequence manager is always in the controller with the main flow sensor. Usually, boiler 1 is also controlled by the controller with the main flow sensor. Normally, boiler 1 is assigned boiler address 1, boiler 2 boiler address 2, etc. In normal situations, no changes are required here.

  • Page 211: Heat Demand And Load Control

    14.5.1 Heat demand and load control The heat demand and the load control signals are exchanged via the heat distribution zones. Main menu > Commissioning > Communication > Distribution zones Operating line Range Factory setting Heat distribution zone 1…31 Heat distr zone consumer side ---- / 1…31 Outside temperature zone ---- / 1…31...

  • Page 212: Fault Handling

    14.6 Fault handling The RMK770 controller has maximum 1 heating circuit and 1 time switch. Index 1 indicates that the fault occurred on this plant. Bus power supply fault Number Text Effect 5000 No bus power supply No bus power supply. Urgent message;...
  • Page 213 Addressing fault Number Text Effect 6001 >1 identical device ad- More than 1 device with the same device dress address. Urgent message; must be acknowledged Boiler addressing fault Number Text Effect >1 boiler with address 2 boilers with boiler address 1. 5512 number 1 Nonurgent message;...

  • Page 214: Fault Tracing Support

    Fault tracing support If a fault is displayed, it is always practical to select the Main menu , operating line ”Faults > Faults current” , and look for any pending fault status messages before starting to rectify a fault. If an extension module is faulty, that fault must be corrected first because it can lead to sub sequential fault status messages.
  • Page 215 Number Name (as supplied) For explanation, refer to section … 2302 [B2 burner] fault 7.15 2303 [B3 burner] fault 7.15 2304 [B4 burner] fault 7.15 2305 [B5 burner] fault 7.15 2306 [B6 burner] fault 7.15 2311 [B1 burner] no checkback signal 7.15 2312 [B2 burner] no checkback signal...
  • Page 216 Number Name (as supplied) For explanation, refer to section … 2411 [B1 pump] no flow 7.15 2412 [B2 pump] no flow 7.15 2413 [B3 pump] no flow 7.15 2414 [B4 pump] no flow 7.15 2415 [B5 pump] no flow 7.15 2416 [B6 pump] no flow 7.15...

  • Page 217: Rectification Of Faults

    Number Name (as supplied) For explanation, refer to section … >1 boiler with address number 3 5532 14.6 5542 >1 boiler with address number 4 14.6 >1 boiler with address number 5 5552 14.6 5562 >1 boiler with address number 6 14.6 5591 Failure boiler sequence manager...

  • Page 218: Addendum

    Addendum 16.1 Configuration diagrams Use of the configuration diagrams is explained in subsection 3.3.5 „Use of configuration diagrams“ 16.1.1 Terminal markings The designations of the signal inputs and outputs and of the assigned connection terminals are structured according to the following pattern: Example Explanation N.X3...

  • Page 219: Configuration Diagram Plant Type K

    16.1.4 Configuration diagram plant type K 219/232 Building Technologies Boiler sequence controller RMK770 CE1P3132en HVAC Products 16 Addendum 23.04.2009...

  • Page 220: Configuration Diagram Plant Type K1.1

    16.1.5 Configuration diagram plant type K1.1 220/232 Building Technologies Boiler Sequence Controller RMK770 CE1P3132en HVAC Products 16 Addendum 23.04.2009...

  • Page 221: Editable Texts

    16.2 Editable texts The following list of editable texts shall serve as an aid for engineering and commis- sioning. The maximum text length is 20 characters. On the password level, operating texts, such as menu, fault or datapoint texts can be reset as follows: Main menu >...

  • Page 222: Primary Controller

    Main menu > Settings > Boiler 1 (or 2…6 ) > Fault settings Datapoint name Factory setting [Boiler x] boiler sensor error [Bx] boil sens err [Boiler x] return sensor error [Bx] ret sens err [Bx] flue gas temp sensor error [Bx] flue gas s err [Bx] flue gas overtemperature [Bx] flue gas o’temp...

  • Page 223: Faults

    16.2.5 Faults Main menu > Settings > Faults > Fault input 1 (or 2 , 3 or 4 ) Datapoint name Factory setting Fault text 1: [Fault input 1] fault Fault text 2: [Fault input 2] fault Fault text 3: [Fault input 3] fault Fault text 4: [Fault input 4] fault...

  • Page 224: Info

    16.3 Info pages From the start page (Welcome picture), the Info level (refer to subsection 2.2.3 “Operating levels”) is reached by pressing the INFO button. Here, you find the key plant data listed. No values can be changed here. The Info level comprises several pages.
  • Page 225 Heating circuit Actual value flow temperature Flow temperature setpoint State Cause Heating circuit Actual value room temp Current room temp setpoint Actual value outside temp Display values Actual value outside temp Display input 1 Display input 2 Display input 3 Display input 4 Fault inputs Fault input 1...
  • Page 226 Building time constant ..........163 Data backup ............46 Burner cycling protection........110 Data set ..............46 Burner hours run counter ........126 Device address............206 Burner output............126 Device information ........... 46 226/232 Siemens Boiler sequence controller RMK770 CE1P3132en Building Technologies Index 23.04.2009...
  • Page 227 Field of use .............. 14 Heating up brake, heating circuit......175 File name ..............54 Holiday input ............42 Fixed lead boiler............80 Holidays .............59, 60 Flow temperature setpoint, influence ..... 166 Holidays input............61 227/232 Siemens Boiler sequence controller RMK770 CE1P3132en Building Technologies Index 23.04.2009...
  • Page 228 Meter units..............186 Plant stop............... 197 Meters ..............186 Plant types............... 22 Minimum boiler temperature optimization ....118 Precontrol .............. 138 Minimum limitation of the boiler temperature ..117 Predefined fault inputs........... 199 228/232 Siemens Boiler sequence controller RMK770 CE1P3132en Building Technologies Index 23.04.2009...
  • Page 229 Room temperature, maximum limitation ....172 Types of primary controller........139 Room unit QAW740 ..........154 Room unit, communication ........209 Run priority............... 71 Universal fault inputs ..........199 Urgent fault status messages.........197 229/232 Siemens Boiler sequence controller RMK770 CE1P3132en Building Technologies Index 23.04.2009...
  • Page 230 Wiring test............45, 204 Valve kick in general ........63, 119 Valve kick primary controller ........147 Yearly clock ............. 52 Valve kick, heating circuit ........176 Views, trend............184 Virtual heating circuit ........41, 135, 150 230/232 Siemens Boiler sequence controller RMK770 CE1P3132en Building Technologies Index 23.04.2009...
  • Page 231 231/232 Building Technologies Boiler Sequence Controller RMK770 CE1P3132en HVAC Products Revision history 23.04.2009...
  • Page 232 Siemens Switzerland Ltd © 2004-2009 Siemens Switzerland Ltd Industry Sector Subject to alteration Building Technologies Division International Headquarters HVAC Products Gubelstrasse 22 CH-6301 Zug Tel. +41 41 724 24 24 Fax +41 41 724 35 22 www.sbt.siemens.com 232/232 Building Technologies...

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