Siemens Synco 700 Series Operator's manual

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

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Siemens Switzerland Ltd
Industry Sector
Building Technologies Division
International Headquarters
HVAC Products
Gubelstrasse 22
CH -6301 Zug
Tel. [phone]
Fax [phone]
www.sbt.siemens.com
© 2004-2009 Siemens Switzerland Ltd
Subject to alteration

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Contents
1Summary ....................................................................................................... 11
1.1 Product range ................................................................................................ 11
1.2 System topology ............................................................................................ 12
1.3 Equipment combinations ............................................................................... 12
1.4 Product documentation.................................................................................. 13
1.5 Important notes.............................................................................................. 14
2Operation....................................................................................................... 15
2.1 Operation without operator unit ..................................................................... 15
2.2 Operation with operator unit .......................................................................... 16
2.2.1 Functions of the operator unit........................................................................ 16
2.2.2 Operating concept ......................................................................................... 16
2.2.3 Operating levels............................................................................................. 17
2.2.4 Access rights ................................................................................................. 18
3Commissioning .............................................................................................. 19
3.1 Basic concept ................................................................................................ 19
3.2 Entering the commissioning mode ................................................................22
3.3 Basic configuration ........................................................................................ 22
3.3.1 Plant types..................................................................................................... 22
3.3.2 Terminal assignment and properties of outputs ............................................ 31
3.3.3 Short designations for basic module and extension modules ......................32
3.3.4 Maximum configuration ................................................................................. 32
3.3.5 Use of configuration diagrams....................................................................... 32
3.3.6 Extension modules ........................................................................................ 34
3.4 Extra configuration......................................................................................... 36
3.4.1 Hydraulics-dependent inputs and outputs of function block “Boiler
sequence manager”....................................................................................... 37
3.4.2 Hydraulics-dependent inputs and outputs of function block “Boiler“.............. 38
3.4.3 Hydraulics-dependent inputs and outputs of function block
“Precontrol“.................................................................................................... 39
3.4.4 Hydraulics-dependent inputs and outputs of function block “Heating
circuit“ ............................................................................................................ 40
3.4.5 Miscellaneous................................................................................................ 41
3.4.6 Faults............................................................................................................. 42
3.4.7 Configuration of the universal inputs and outputs .........................................42
3.5 Several boiler sequence controllers RMK770 ...............................................44
3.6 Wiring test...................................................................................................... 45
3.7 Completing commissioning............................................................................ 46
3.8 Data backup .................................................................................................. 46
3.9 Device information......................................................................................... 46

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3.10 Leaving the password level............................................................................47
3.11 Marking changes............................................................................................47
3.12 Plant types and default terminal assignments ...............................................48
4General settings.............................................................................................52
4.1 Time of day and date .....................................................................................52
4.1.1 Operating principle.........................................................................................52
4.1.2 Communication ..............................................................................................52
4.1.3 Fault handling ................................................................................................53
4.2 Selecting the language ..................................................................................54
4.3 Selecting the unit of temperature ...................................................................54
4.4 Contrast of the operator unit’s display ...........................................................54
4.5 Text entry .......................................................................................................54
4.5.1 Device name and file name ...........................................................................54
4.5.2 Aggregate names...........................................................................................55
4.5.3 Text of fault inputs..........................................................................................55
4.5.4 Electronic business card ................................................................................55
4.5.5 Resetting text entries .....................................................................................56
5General functions, fundamentals ...................................................................57
5.1 Time switch ....................................................................................................57
5.1.1 Communication ..............................................................................................57
5.1.2 Entering the 24-hour program for space heating ...........................................58
5.1.3 Fault handling ................................................................................................59
5.2 Holidays / special days ..................................................................................59
5.2.1 Communication ..............................................................................................59
5.2.2 Holidays .........................................................................................................60
5.2.3 Special days...................................................................................................60
5.2.4 Calendar entry ...............................................................................................61
5.2.5 Control inputs for holidays and special days..................................................61
5.2.6 Fault handling ................................................................................................62
5.3 Frost protection for the plant ..........................................................................62
5.4 Pump overrun and mixing valve overrun .......................................................63
5.5 Pump kick and valve kick...............................................................................63
5.6 Heat demand and load control.......................................................................64
5.6.1 Heat demand .................................................................................................64
5.6.2 Load control ...................................................................................................65
5.7 Mixing valve control .......................................................................................66
5.7.1 Control ...........................................................................................................66
5.7.2 Setting aids ....................................................................................................67
5.7.3 Control signal .................................................................................................69
5.8 Pump control..................................................................................................69
5.8.1 Hours run counter ..........................................................................................69

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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
6Boiler sequence management....................................................................... 73
6.1 Overview of function block............................................................................. 73
6.2 Configuration ................................................................................................. 74
6.3 Boiler sequence management....................................................................... 77
6.3.1 Concept ......................................................................................................... 77
6.3.2 Orders for boilers to be switched on and off.................................................. 78
6.3.3 Boiler sequence order ................................................................................... 81
6.3.4 Boiler sequence operating mode................................................................... 83
6.3.5 Sustained mode............................................................................................. 85
6.3.6 Switching boilers on and off........................................................................... 85
6.4 Supervision of faults ...................................................................................... 89
6.5 Heat demand and heat request ..................................................................... 91
6.5.1 Heat request modulating ............................................................................... 92
6.5.2 Heat request 2-position ................................................................................. 92
6.5.3 Heat demand transformers............................................................................ 93
6.6 Other functions .............................................................................................. 93
6.6.1 Common maintained boiler return temperature............................................. 93
6.6.2 Maximum limitation of the flow temperature setpoint .................................... 94
6.6.3 Frost protection.............................................................................................. 95
6.7 Diagnostics .................................................................................................... 95
6.8 Fault handling ................................................................................................ 97
7Boiler control.................................................................................................. 99
7.1 Overview of function block............................................................................. 99
7.2 Configuration ............................................................................................... 101
7.2.1 Burner types ................................................................................................ 103
7.2.2 Boiler hydraulics .......................................................................................... 104
7.3 Additional boilers ......................................................................................... 106
7.4 Boiler operating modes and boiler setpoints ...............................................106
7.5 Releasing and locking a boiler..................................................................... 106
7.6 Individual operation ..................................................................................... 107
7.7 Test mode and commissioning aids ............................................................ 108
7.8 Control of the burner.................................................................................... 109
7.8.1 2-position control of 1-stage burners ........................................................... 109
7.8.2 2-position control of 2-stage burners ........................................................... 110
7.8.3 Control of burner’s basic stage and stage 2 ................................................ 110
7.8.4 Control of modulating burners ..................................................................... 112
7.8.5 External burner control ................................................................................ 116
7.9 Protective boiler functions ...........................................................................116

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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
7.9.9 Frost protection for the boiler .......................................................................119
7.9.10 Protection against pressure shocks .............................................................120
7.10 Minimum limitation of the return temperature ..............................................120
7.11 Flue gas temperature supervision................................................................122
7.12 Flue gas measuring mode ...........................................................................123
7.13 Boiler faults ..................................................................................................124
7.14 Burner hours run counter and output balance ............................................126
7.15 Fault status messages .................................................................................127
7.16 Boiler designations.......................................................................................132
7.17 Diagnostic choices .......................................................................................132
8Heat demand and heat requests..................................................................134
8.1 Heat requests...............................................................................................134
8.2 Weather-compensated setpoint for boiler sequencing.................................135
8.3 Heat demand transformers ..........................................................................135
9Precontrol.....................................................................................................138
9.1 Overview of function block ...........................................................................138
9.2 Configuration................................................................................................138
9.3 Types of primary controller ..........................................................................139
9.3.1 Control of mixing valve.................................................................................139
9.3.2 Pump control................................................................................................139
9.4 Plant operation.............................................................................................140
9.5 Heat demand and heat request ...................................................................140
9.5.1 Heat request modulating..............................................................................141
9.5.2 Heat request 2-position................................................................................142
9.5.3 Heat demand transformers ..........................................................................142
9.6 Control of mixing valve.................................................................................143
9.6.1 General ........................................................................................................143
9.6.2 Load control .................................................................................................143
9.7 Setpoint boost mixing valve and system pump............................................143
9.8 Limit and protective functions ......................................................................144
9.8.1 Frost protection ............................................................................................144
9.8.2 Limitations....................................................................................................144
9.8.3 Limitation of the return temperature.............................................................145

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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
9.9 Text designation .......................................................................................... 147
9.10 Fault handling .............................................................................................. 148
9.11 Diagnostic choices....................................................................................... 148
10 Heating circuit control .................................................................................. 150
10.1 Overview of function block........................................................................... 150
10.2 Configuration ............................................................................................... 150
10.2.1 3-position or modulating mixing valve ......................................................... 152
10.2.2 Pump control ............................................................................................... 152
10.3 Heating circuit operating mode.................................................................... 152
10.3.1 Room operating modes ............................................................................... 152
10.3.2 User requests from the room....................................................................... 154
10.3.3 Room operating mode contact .................................................................... 154
10.3.4 Timer function.............................................................................................. 155
10.3.5 Room operating mode outputs .................................................................... 155
10.3.6 Plant operation ............................................................................................ 157
10.3.7 Control priorities in the heating circuit .........................................................157
10.4 Room temperature setpoints ....................................................................... 159
10.4.1 Settings........................................................................................................ 159
10.4.2 Increasing the Economy setpoint ................................................................160
10.4.3 Room temperature setpoint adjuster, absolute............................................ 160
10.4.4 Room temperature setpoint adjuster, relative.............................................. 162
10.5 Weather-compensated heating circuit control ............................................ 162
10.5.1 The composite and the attenuated outside temperature ............................. 163
10.5.2 Heating curve .............................................................................................. 164
10.5.3 Influence on the flow temperature setpoint.................................................. 166
10.5.4 Heating limit switch...................................................................................... 167
10.6 Mixing valve control ..................................................................................... 168
10.6.1 Control ......................................................................................................... 168
10.6.2 Load control................................................................................................. 169
10.7 Optimization functions ................................................................................. 170
10.7.1 Type of optimization .................................................................................... 170
10.7.2 Otimum start / stop control .......................................................................... 171
10.7.3 Quick setback and boost heating ................................................................171
10.8 Limit and protective functions ...................................................................... 172
10.8.1 Maximum limitation of the room temperature .............................................. 172
10.8.2 Return temperature limitation ...................................................................... 173
10.8.3 Pulse limitation ............................................................................................ 175
10.8.4 Frost functions and general protective functions ......................................... 175
10.8.5 Pump overrun and mixing valve overrun ..................................................... 176

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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
11 Data acquisition ...........................................................................................184
11.1 Trend............................................................................................................184
11.1.1 Connections and use ...................................................................................184
11.1.2 Views ...........................................................................................................184
11.1.3 Trend function settings.................................................................................185
11.2 Fault handling ..............................................................................................186
11.3 Meters ..........................................................................................................186
11.3.1 Configuration................................................................................................186
11.3.2 Meter types ..................................................................................................186
11.3.3 Pulse valency...............................................................................................187
11.3.4 Overflow value .............................................................................................188
11.3.5 Setting and resetting meter readings ...........................................................188
11.3.6 Meter readings .............................................................................................188
11.3.7 Assignment of texts......................................................................................189
11.3.8 Fault handling ..............................................................................................189
12 Function block “Miscellaneous“....................................................................190
12.1 Overview of function block ...........................................................................190
12.2 Configuration................................................................................................190
12.3 Outside sensor.............................................................................................190
12.3.1 Outside temperature simulation ...................................................................192
12.3.2 Fault handling ..............................................................................................192
12.4 Display inputs...............................................................................................193
12.5 Outside temperature relay ...........................................................................194
12.6 Diagnostic choices .......................................................................................194
13 Function block “Faults“.................................................................................195
13.1 Overview of function block ...........................................................................195
13.2 Configuration................................................................................................195
13.3 Fault button ..................................................................................................195
13.4 External fault button .....................................................................................196
13.5 Fault properties ............................................................................................196
13.5.1 Acknowledgement and reset........................................................................196
13.5.2 Signal priority ...............................................................................................197

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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............................................................................................ 202
13.10 Fault relays .................................................................................................. 202
13.11 Display of faults ........................................................................................... 204
13.12 Deletion of all fault status messages ........................................................... 204
13.13 Function check and wiring test .................................................................... 204
13.14 Diagnostic choices....................................................................................... 205
14 Communication............................................................................................ 206
14.1 Basic settings .............................................................................................. 206
14.2 Calendar data (holidays and special days).................................................. 207
14.3 Room data ................................................................................................... 208
14.3.1 Communication variants .............................................................................. 208
14.3.2 Settings........................................................................................................ 208
14.3.3 Settings on the room unit............................................................................. 209
14.4 Heat generation zone and boiler sequence zone ........................................ 209
14.5 Heat distribution zones ................................................................................ 210
14.5.1 Heat demand and load control .................................................................... 211
14.5.2 Outside temperature.................................................................................... 211
14.6 Fault handling .............................................................................................. 211
15 Fault tracing support.................................................................................... 214
15.1 Fault code list .............................................................................................. 214
15.2 Rectification of faults ...................................................................................217
16 Addendum ................................................................................................... 218
16.1 Configuration diagrams ............................................................................... 218
16.1.1 Terminal markings ....................................................................................... 218
16.1.2 Code letters ................................................................................................. 218
16.1.3 Configuration choices .................................................................................. 218
16.1.4 Configuration diagram plant type K ............................................................. 219
16.1.5 Configuration diagram plant type K1.1 ........................................................ 220
16.2 Editable texts ............................................................................................... 221
16.2.1 Boiler sequence manager............................................................................221
16.2.2 Boilers.......................................................................................................... 221
16.2.3 Primary controller ........................................................................................ 222
16.2.4 Heating circuit.............................................................................................. 222
16.2.5 Faults........................................................................................................... 223

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16.2.6 Meters ..........................................................................................................223
16.2.7 Devices ........................................................................................................223
16.2.8 Menu tree.....................................................................................................223
16.3 Info pages ....................................................................................................224

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1 Summary
1.1 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
relay outputs
RMZ787
Universal module with 4 inputs, 2
analog outputs and 2 relay outputs
RMZ788
Universal module with 6 inputs, 2
analog outputs and 4 relay outputs
RMZ789
Module connector For detached extension modules RMZ780
Operator units Operator unit, plug-in type RMZ790
Operator unit, detached RMZ791
KNX bus operator unit RMZ792
Service unit Service tool OCI700.1
RMK770
RMZ785 RMZ787
RMZ788 RMZ789 RMZ780
RMZ790 RMZ791 RMZ792

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1.2 System topology
RXB
…
QAW740
RMZ790
RMZ791
OCI700.1
KNX TP1
RMK770 RMU7… RM…
3132Z02
1.3 Equipment combinations
Description Technical data / product no. Data Sheet no.
Passive sensors Sensors using sensing elements
LG-Ni1000, Pt 1000 or T1 (PTC)
N1721…N1846,
N1713
Active sensors Sensors
•operating on AC 24 V
•with modulating DC 0…10 V output
N1821,
N1850…N1932
Monitors RAK…
QBM81…
QVE1900, QVE1901
N1186…N1190
N1552
N1592, N1594
Room units QAA25, QAA27
QAW740
N1721
N1633
Passive setpoint
adjusters
QAA25, QAA27
BSG21…
N1721
N1991
Active signal
sources
BSG61
N1992
Actuating devices Electromotoric and electrohydraulic actuators
•operating on AC 24 V
•3-position control
•modulating control DC 0..10 V
For more detailed information about actuators
and valves, refer to:
N4000…N4999

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1.4 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
no.
Product range description "HVAC controllers with KNX interface” S3110
Data Sheet ”Boiler sequence controller RMK770” N3132
Data Sheet “Universal modules RMZ785, RMZ787, RMZ788, RMZ789” N3146
Data Sheet “Module connector RMZ780” N3138
Data Sheet “KNX bus” N3127
Data Sheet “ Service tool OCI700.1” N5655
Installation Instructions for RMH760B and RMK770 G3133
Mounting Instructions for extension modules RMZ78… M3110
Mounting Instructions for detached operator unit RMZ791 M3112
Mounting Instructions for module connector RMZ780 M3138
Operating Instructions for RMH760B-1 and RMK770-1
(de, fr, it, es)
B3133x1
Operating Instructions for RMH760B-2 and RMK770-2
(en, de, fr, nl)
B3133x2
Operating Instructions for RMH760B-3 and RMK770-3
(sv, fi, no, da)
B3133x3
Operating Instructions for RMH760B-4 and RMK770-4
(pl, cs, sk, hu, ru, bg)
B3133x4
Operating Instructions for RMH760B-5 and RMK770-5
(sr, hr, sl, ro, el, tk)
B3133x5
Basic Documentation “Communication via KNX bus“ P3127
Declaration of CE Conformity, Synco™ 700 T3110
Environmental Declaration for controller RMK770 E3132
Mounting Instructions for extension modules RMZ78… E3110…02
Environmental Declaration for operator units RMZ790 and RMZ791 E3110…03

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1.5 Important notes
This symbol shall draw your attention to special safety notes and warnings. If such
notes are not observed, personal injury and/or considerable damage to property can
occur.
Synco™ 700 products may only be used for the control and supervision of heating,
ventilation, air conditioning and chilled water plant.
Prerequisites for flawless and safe operation of Synco™ products are proper transport,
installation and commissioning, as well as correct operation.
Fuses, switches, wiring and earthing must be in compliance with local safety regula-
tions for electrical installations.
Preparation for use and commissioning of Synco™ products must be undertaken by
qualified staff who have been appropriately trained by Siemens Building Technologies.
Synco™ 700 products 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.
When wiring the system, the AC 230 V section must be strictly segregated from the
AC 24 V safety extra low-voltage (SELV) section in order to ensure protection against
electric shock hazard!
For storage and transport, the limits given in the relevant Data Sheets must always be
observed.
If in doubt, contact your supplier or Siemens Building Technologies.
Synco™ 700 products are maintenance-free, apart from cleaning at regular intervals.
System sections accommodated in the control panel should be freed from dust and dirt
whenever normal service visits are due.
Should system faults occur and you are not authorized to make diagnostics and to
rectify faults, call Siemens Building Technologies service staff.
Only authorized staff are permitted to perform diagnostics, to rectify faults and to restart
the plant. This also applies to work carried out within the control panel (e.g. safety
checks or changing fuses).
•The products contain electrical and electronic components and must not be disposed
of together with domestic waste
•Local and currently valid legislation must be observed
Field of use
Correct use
Electrical installation
Commissioning
Operation
Wiring
Storage and transport
Maintenance
Faults
Disposal

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2 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.
2.1 Operation without operator unit
Without operator unit, the following operating elements on the controller and extension
module can be used:
3140Z02
1
234
3140Z03
5
Controller Extension module
1 LED (Run) for indicating the device’s operating state:
LED lit: Power on, correct use and
LED off: No power or incorrect use / faulty peripheral devices
2 Button
with LED (red) for indicating fault status messages and their acknowl-
edgement:
LED blinks: Fault status message ready for acknowledgement
LED lit: Fault status message still present but not yet reset
LED off: No fault status message present
Press button: Acknowledge or reset fault
3 Program button (Prog): Learning button for switching between normal mode and
addressing mode for adopting the physical device address (tool required)
4 Programming LED (Prog): LED for indicating “Normal mode“ (LED off) or “Address-
ing mode“ (LED on); it goes off automatically after the physical address has been
adopted
5 LED (Run) for monitoring power supply and module addressing:
LED lit: Power on, module addressing lit
LED blinks: Power on, but module has not yet been addressed by the controller
LED off: No power

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2.2 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.
2.2.2 Operating concept
On the software side, all setting and readout values are arranged as datapoints of the
menu tree. Using the operating elements, every datapoint can be selected, displayed or
set. The LCD shows all menus in cleartext.
The controller is supplied with several languages programmed; when commissioning
the plant, the required language must be activated. The Operating Instructions for the
enduser are included with the controller; they contain the languages with which the
controller is supplied.
3
4
2
1
5
3111Z05
Plug-in type operator unit
RMZ790
3
4
3112Z08
2
1
5
Detached operator unit
RMZ791
1 Display
2 INFO button
Function 1: Display of key plant data
Function 2: Display of information about the individual datapoints on the current
menu
3 OK select-and-push knob
Turn: Menu option or adjustment of value
Press: Confirm menu line or setting
4 ESC button: Going back to the previous menu
5 Fault button with LED
LED: Fault
Press: Acknowledge or reset fault
When one of the operating elements is operated, the backlit display is automatically
switched on. If the controller is not operated for 30 minutes, the operator unit switches
itself off and the start page appears.
General
Operating elements

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Start display:
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: ––.––.–– ––.––
End: ––.––.–– ––.––
Reason: Holidays
Cancel entry
Setting level, Help picture ”Explanations relating to the selected datapoint”. The text
identification number of the menu tree appears in the corner at bottom right (only
access levels “Service level” and “Password”):
Main me> Heating> Heating
[Curvepoint 1] flow temp:
486
Info level, “Display of key plant data”:
Room operating mode
Preselection:
State: Comf
Cause: Time switch
2.2.3 Operating levels
There are 2 operating levels:
•The Info level
•The setting level
•These 2 levels are always active, independent of the access level currently used
When on this level, important plant data can be displayed.
The setting level is structured like a menu. It provides for reading and adjustment of
datapoints.
Using the INFO button, explanations relating to the menus with the individual datapoints
can be displayed. The information is displayed as long as the button is kept depressed.
Display examples
Info level
Setting level
25.02

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•Switching from the Info level to the setting level:
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. Select the start page with the ESC button. Press the button repeatedly until the
start page reappears.
2. Press the INFO button to change to the Info level.
2.2.4 Access rights
An access right is defined for each parameter (operating line). There are 3 access
levels:
Level Access Icon
User level
(for the plant operator)
The user level is always accessible.
The alterable datapoints displayed here can be
changed by the plant operator
Service level
(for the service engineer)
Press OK knob and ESC button simultane-
ously. Then, select operating line ”Service
level” and confirm by pressing the OK knob
Password level
(for the expert)
Commissioning:
Press OK knob and ESC button simultane-
ously. Then, select operating line "Password”
and confirm by pressing the OK knob. Enter
number 7 for the password and confirm by
pressing the OK knob
District heat parameters:
Press OK knob and ESC button simultane-
ously. Then, select parameter Password level
and confirm by pressing the OK knob. Enter
number 11 for the password and confirm by
pressing the OK knob
Individual menu items or datapoints are enabled depending on the access level. On a
higher access level, it is always possible to also display all menu items and datapoints
of the lower access levels.
There is only 1 menu (the password level shows the entire menu).
•After a time-out (30 minutes with no operation on the controller), the controller
switches to the user level
•Switching from the current access level to another access level:
1. Press the OK knob and the ESC button simultaneously. The Access levels menu
appears.
2. Select the required access level by turning the OK knob and confirm by pressing
the knob.
3. Enter number 7 as a password to access the password level.
The password can be changed via the ACS7… plant operating software.
These parameters can be provided by the district heat utility.
After entering the respective password, the settings for maximum limitation of the return
temperature and for pulse limitations can be made.
Switching between the
operating levels
Switching to another
access level
Password
District heat parameters

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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 3 Commissioning 23.04.2009
3 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.
3.1 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. Boiler hydraulics
and the type of burner selected with the plant type in the basic configuration always
apply to both boilers. Any adaptations in terms of boiler hydraulics and type of burner
can subsequently be made in the extra configuration. By selecting a plant type that is
very similar to the actual plant, adaptations can be kept to a minimum. But it is also
possible to start with basic type K and then add all plant elements in the extra configu-
ration.
The boilers predefined with the plant type are assigned to boiler 1 and boiler 2. They
are also given boiler addresses 1 and 2 on the KNX bus. Further, by selecting the plant
type, the common main flow and main return temperature sensors are predefined.
If additional boilers need to be configured, this is to be made via the Extra configuration
menu. For additional boilers, each plant element (burner stages, boiler sensor, etc.)
must be configured separately.
When a second RMK770 controller is used with the third boiler, the start must be made
on the second RMK770 with basic type K. The plant components must now be as-
signed to boiler 3. On the RMK770 with boilers 1 and 2, the number of boilers must be
increased to 3 via the Settings > Boiler sequence manager menu. As a result, boiler 3 is
automatically included as a boiler of the boiler sequence, to be displayed on the first
RMK770 controller in the overview on the information level.
Boiler sequence with 3 boilers, each equipped with a 1-stage burner.
T T
T
T
3132S41
T
First, select plant type K5.1 because it corresponds to the required boiler hydraulics
and the types of burner (refer to subsection 3.3.1 “Plant types”).
Example

20/232
Building Technologies Boiler Sequence Controller RMK770 CE1P3132en
HVAC Products 3 Commissioning 23.04.2009
T T
T
3132S42
CE-
Q11
D1X8
Q24
Q23
G0M
MY1G1 G
G1
X6
M
X5
MMM
X3X2
M
X4
M
Q33
Q34
Q41
Q44
Q53
Q54
Q63
Q64
Q14
CE+ X1 G1
Q12 Q4 2
Q73
Q74
Y2 G0
X7
D2MM
G1 G0G1
RMK770
T
To integrate the third boiler, 2 choices are available:
Since the RMK770 controller does not have a sufficient number of outputs, an exten-
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.
TT
T
T
3132S43
CE-
Q11
D1X8
Q24
Q23
G0M
MY1G1 G
G1
X6
M
X5
MMM
X3X2
M
X4
M
Q33
Q34
Q41
Q44
Q53
Q54
Q63
Q64
Q14
CE+ X1 G1
Q12 Q42
Q73
Q74
Y2 G0
X7
D2MM
G1 G0 G1
RMK770
T
RMZ78…
123
Variant with
extension module