Siemens Synco700 RMK770 Operator's manual

Edition 1.0
Controller series A
CE1P3132en
01.03.2005
Building Technologies
HVAC Products
Synco™700
Modular Boiler Sequence Controller
RMK770
including extension modules RMZ785, RMZ787, RMZ788 and
RMZ789
Basic Documentation

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Siemens Switzerland Ltd
Building Technologies Group
HVAC Products
Gubelstrasse 22
CH -6301 Zug
Tel. [phone]
Fax [phone]
www.sbt.siemens.com
© 2005 Siemens Switzerland Ltd
Subject to alteration

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Contents
1Summary ....................................................................................................... 11
1.1 Range of units ............................................................................................... 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 ........................................................................................ 35
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“.............. 39
3.4.3 Hydraulics-dependent inputs and outputs of function block
“Precontrol“.................................................................................................... 40
3.4.4 Hydraulics-dependent inputs and outputs of function block “Heating
circuit“ ............................................................................................................ 41
3.4.5 Heat requisition.............................................................................................. 42
3.4.6 Miscellaneous................................................................................................ 43
3.4.7 Faults............................................................................................................. 44
3.4.8 Configuration of the universal inputs and outputs .........................................44
3.5 Several boiler sequence controllers RMK770 ...............................................46
3.6 Wiring test...................................................................................................... 46
3.7 Concluding commissioning............................................................................ 47
3.8 Data backup .................................................................................................. 47

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3.9 Device information .........................................................................................48
3.10 Leaving the password level............................................................................48
3.11 Marking changes............................................................................................48
3.12 Plant types and default terminal assignments ...............................................49
4General settings.............................................................................................53
4.1 Time of day and date .....................................................................................53
4.1.1 Operating principle.........................................................................................53
4.1.2 Communication ..............................................................................................53
4.1.3 Error handling ................................................................................................54
4.2 Selecting the language ..................................................................................55
4.3 Selecting the unit of temperature ...................................................................55
4.4 Contrast on the operator unit’s display ..........................................................55
4.5 Text entry .......................................................................................................56
4.5.1 Device name and file name ...........................................................................56
4.5.2 Aggregate names...........................................................................................56
4.5.3 Text of fault inputs..........................................................................................56
4.5.4 Electronic business card ................................................................................56
5General functions, fundamentals ...................................................................58
5.1 Time switch ....................................................................................................58
5.1.1 Communication ..............................................................................................58
5.1.2 Time switch for external controllers on the bus..............................................58
5.1.3 Entering the 24-hour program for space heating ...........................................59
5.1.4 Error handling ................................................................................................60
5.2 Holidays/special days ....................................................................................60
5.2.1 Communication ..............................................................................................60
5.2.2 Holidays .........................................................................................................61
5.2.3 Special days...................................................................................................61
5.2.4 Calendar entry ...............................................................................................62
5.2.5 Control inputs for holidays and special days..................................................62
5.2.6 Error handling ................................................................................................63
5.3 Frost protection for the plant ..........................................................................63
5.4 Pump overrun and mixing valve overrun .......................................................64
5.5 Pump kick and valve kick...............................................................................64
5.6 Heat demand and load control.......................................................................65
5.6.1 Heat demand .................................................................................................65
5.6.2 Load control ...................................................................................................66
5.7 Mixing valve control .......................................................................................67
5.7.1 Control ...........................................................................................................67
5.7.2 Setting aids ....................................................................................................68
5.7.3 Control signal .................................................................................................70
5.8 Pump control and twin pumps........................................................................71

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5.8.1 Changeover logic........................................................................................... 72
5.8.2 Overload message and supervision of flow................................................... 73
6Boiler sequence management....................................................................... 74
6.1 Function block overview ................................................................................ 74
6.2 Configuration ................................................................................................. 76
6.3 Boiler sequence management....................................................................... 78
6.3.1 Concept ......................................................................................................... 78
6.3.2 Orders for boilers to be switched on and off.................................................. 79
6.3.3 Boiler sequence order ................................................................................... 82
6.3.4 Boiler sequence operating mode................................................................... 84
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 requisition................................................................. 91
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.............................................................................................. 94
6.7 Diagnostics .................................................................................................... 94
6.8 Error handling ................................................................................................ 96
7Boiler temperature control ............................................................................. 98
7.1 Function block overview ................................................................................ 98
7.2 Configuration ................................................................................................. 99
7.2.1 Burner types ................................................................................................ 102
7.2.2 Boiler hydraulics .......................................................................................... 102
7.3 Additional boilers ......................................................................................... 104
7.4 Boiler operating modes and boiler setpoints ...............................................104
7.5 Releasing and locking a boiler..................................................................... 105
7.6 Individual operation ..................................................................................... 106
7.7 Test mode and commissioning aids ............................................................ 106
7.8 Burner control .............................................................................................. 107
7.8.1 2-position control of 1-stage burners ........................................................... 107
7.8.2 2-position control of 2-stage burners ........................................................... 108
7.8.3 Control of burner’s basic stage and stage 2 ................................................ 108
7.8.4 Control of modulating burners ..................................................................... 110
7.8.5 External burner control ................................................................................ 114
7.9 Protective boiler functions ...........................................................................114
7.9.1 Maximum limitation of the boiler temperature.............................................. 115
7.9.2 Minimum limitation of the boiler temperature............................................... 115
7.9.3 Protective boiler startup............................................................................... 115
7.9.4 Optimization of the minimum boiler temperature......................................... 116

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7.9.5 Boiler shutdown ...........................................................................................116
7.9.6 Protection against boiler overtemperatures .................................................117
7.9.7 Pump kick and valve kick.............................................................................117
7.9.8 Frost protection for the plant with boiler pump.............................................117
7.9.9 Frost protection for the boiler .......................................................................117
7.9.10 Protection against pressure shocks .............................................................118
7.10 Minimum limitation of the return temperature ..............................................118
7.11 Flue gas temperature supervision................................................................119
7.12 Flue gas measuring mode ...........................................................................120
7.13 Boiler faults ..................................................................................................121
7.14 Burner hours run counter and output balance .............................................123
7.15 Error messages............................................................................................123
7.16 Boiler designations.......................................................................................128
7.17 Diagnostic choices .......................................................................................129
8Heat demand and heat requisitions .............................................................131
8.1 Heat requisitions ..........................................................................................131
8.2 Weather-compensated setpoint for boiler sequencing.................................132
8.3 Heat demand transformer ............................................................................132
9Precontrol.....................................................................................................135
9.1 Function block overview...............................................................................135
9.2 Configuration................................................................................................136
9.2.1 Types of primary controllers.........................................................................136
9.2.2 Control of mixing valve.................................................................................137
9.2.3 Pump control................................................................................................137
9.2.4 Return temperature limitation primary controller..........................................137
9.3 Text designation of the primary controller....................................................138
9.4 Plant operation.............................................................................................138
9.5 Heat demand and heat requisition ...............................................................139
9.5.1 Heat requisition modulating .........................................................................139
9.5.2 Heat requisition 2-position ...........................................................................140
9.5.3 Heat demand transformers ..........................................................................141
9.6 Control of mixing valve.................................................................................141
9.6.1 General ........................................................................................................141
9.6.2 Load control .................................................................................................141
9.7 Setpoint boost mixing valve and system pump............................................141
9.8 Limit and protective functions ......................................................................142
9.8.1 Frost protection ............................................................................................142
9.8.2 Limitations....................................................................................................142
9.8.3 Pump overrun and mixing valve overrun .....................................................143
9.8.4 Pump kick and valve kick.............................................................................143
9.9 Error handling ..............................................................................................143

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9.10 Diagnostic choices....................................................................................... 144
10 Heating circuit control .................................................................................. 145
10.1 Function block overview .............................................................................. 145
10.2 Configuration ............................................................................................... 145
10.2.1 3-position or modulating mixing valve .........................................................147
10.2.2 Pump control ............................................................................................... 147
10.3 Text designations for the heating circuit ...................................................... 147
10.4 Auxiliary functions........................................................................................ 147
10.4.1 Acquisition of the room temperature............................................................ 147
10.4.2 Limitation of the return temperature ............................................................149
10.4.3 Room temperature setpoint adjuster, absolute............................................ 150
10.4.4 Room temperature setpoint adjuster, relative.............................................. 151
10.4.5 Room operating mode contact .................................................................... 151
10.4.6 Timer function.............................................................................................. 151
10.4.7 Room control combination........................................................................... 152
10.5 Room operating modes and room temperature setpoints ........................... 154
10.5.1 Room operating modes ............................................................................... 154
10.5.2 Room temperature setpoints ....................................................................... 155
10.5.3 Plant operation ............................................................................................ 155
10.5.4 User requirements in the room .................................................................... 156
10.5.5 Control priorities in the heating circuit .........................................................157
10.6 Weather-compensated heating circuit control ............................................. 158
10.6.1 The composite and the attenuated outside temperature ............................. 159
10.6.2 Heating curve .............................................................................................. 160
10.6.3 Influences on the flow temperature setpoint................................................ 162
10.6.4 Heating limit switch...................................................................................... 163
10.7 Mixing valve control ..................................................................................... 164
10.7.1 Control ......................................................................................................... 164
10.7.2 Load control................................................................................................. 165
10.8 Optimization functions ................................................................................. 165
10.8.1 Type of optimization .................................................................................... 165
10.8.2 Optimum start / stop control ........................................................................ 166
10.8.3 Quick setback and boost heating ................................................................167
10.9 Limit and protective functions ...................................................................... 168
10.9.1 Maximum limitation of the room temperature .............................................. 168
10.9.2 Frost functions and general protective functions ......................................... 169
10.9.3 Pump overrun and mixing valve overrun ..................................................... 169
10.9.4 Pump kick and valve kick ............................................................................170
10.10 Heat demand ............................................................................................... 170
10.11 Error handling .............................................................................................. 170
10.12 Diagnostic choices....................................................................................... 172

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11 Function block miscellaneous ......................................................................173
11.1 Function block overview...............................................................................173
11.2 Configuration................................................................................................173
11.3 Outside sensor.............................................................................................174
11.3.1 Outside temperature simulation ...................................................................175
11.3.2 Error handling ..............................................................................................175
11.4 Display inputs...............................................................................................176
11.5 Outside temperature relay ...........................................................................177
11.6 Diagnostic choices .......................................................................................177
12 Function block faults ....................................................................................178
12.1 Function block overview...............................................................................178
12.2 Configuration................................................................................................178
12.3 Fault button ..................................................................................................179
12.4 Fault properties ............................................................................................179
12.4.1 Acknowledgement and reset........................................................................179
12.4.2 Signal priority ...............................................................................................180
12.4.3 Plant behavior ..............................................................................................180
12.5 State diagrams of the individual types of faults............................................181
12.6 Predefined fault inputs .................................................................................182
12.7 Fault inputs ..................................................................................................182
12.7.1 Universal fault inputs....................................................................................182
12.7.2 Analog fault input with limit value supervision..............................................183
12.8 Communication ............................................................................................184
12.9 Fault relay ....................................................................................................185
12.10 Alarm indication ...........................................................................................186
12.11 Cancellation of all fault status messages.....................................................186
12.12 Functional check and wiring test..................................................................186
12.13 Diagnostic choices .......................................................................................187
13 Communication ............................................................................................188
13.1 Factory settings............................................................................................188
13.2 Generation zone and boiler sequence zone ................................................189
13.3 Distribution zones ........................................................................................190
13.3.1 Heat demand and load control.....................................................................191
13.3.2 Outside temperature ....................................................................................191
13.4 Setting the heating circuit room data and the holidays/special days ...........192
13.5 Error handling ..............................................................................................192
14 Fault tracing support ....................................................................................194
14.1 Error code list...............................................................................................194
14.2 Rectification of errors ...................................................................................201

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15 Appendix...................................................................................................... 202
15.1 Configuration diagrams ............................................................................... 202
15.1.1 Terminal markings ....................................................................................... 202
15.1.2 Code letters ................................................................................................. 202
15.1.3 Configuration choices .................................................................................. 202
15.1.4 Configuration diagram basic type K.............................................................203
15.1.5 Configuration diagram plant type K1.1 ........................................................ 204
15.1.6 Menu tree .................................................................................................... 204
15.2 Info pages.................................................................................................... 219

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

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1.2 System topology
RXB…
QAW740
RMZ790
RMZ791
OCI700.1
Konnex TP1
RMK770 RMU7… RM…
3132Z02
1.3 Equipment combinations
Type of unit Type reference Data Sheet no.
Passive sensors Sensors using a sensing element
LG-Ni 1000, 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…
QVE81.13
N1186…N1190
N1552
N1592
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
•for 3-position control
•for 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
number
Product range description "HVAC controllers with Konnex interface” S3110
Data Sheet ”Boiler sequence controller RMK770” N3132
Data Sheet “Universal modules RMZ787, RMZ788, RMZ789” N3146
Data Sheet “Module connector RMZ780” N3138
Data Sheet “Konnex bus KNX” N3127
Data Sheet “ Service tool OCI700.1” N5655
Installation Instructions for RMH760 and RMK770 G3131
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 controllers RMH760-2 and RMK770-2 (en,
de , fr, nl)
B3131x2
Operating Instructions for RMH760-3 and RMK770-3 (sv, fi, no, da) B3131x3
Operating Instructions for RMH760-4 and RMK770-4 (pl, cs, sk, hu) B3131x4
Operating Instructions for RMH760-5 and RMK770-5 (sr, hr, sl, ro) B3131x5
Basic Documentation “Communication via Konnex 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 Sie-
mens 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 flashes: 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 flashes: 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 passed 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 clear-text.
The controller has several languages programmed; when commissioning the plant, the
required language is to 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
3111Z07
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-press 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 will automatically
be switched on. If the controller is not operated for 30 minutes, the operator unit will
switch itself off and the start page appears.
General
Operating elements

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Start display:
Wednesday 01.03.05 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…
Time switch…
Setting level, pop-up, setting a numerical value:
Entry 1
Start:
–
–.––.–– ––.––
End:
–
–.––.–– ––.––
Reason: Holidays
Setting level, Help picture ”Explanations relating to the selected datapoint”. The text
identification number of the menu tree will appear 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:
•Info level
•Setting level
•These 2 levels are always active, independent of which access level is being 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 the OK knob and the ESC button simul-
taneously; then, select operating line ”Service
level” and confirm by pressing the OK knob
Password level
(for the expert)
Press the OK knob and the ESC button simul-
taneously; then, select operating line "Pass-
word” and confirm by pressing the OK knob;
enter number 7 for the password and confirm
by pressing the OK knob
Individual menu points or datapoints are enabled depending on the access level. On a
higher access level, it is always possible to also display all menu and datapoints of the
lower access levels.
There is only one 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.
Switching between the
operating levels
Switching to another ac-
cess level
Password

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3 Commissioning
Preparation for use and commissioning of Synco™ 700 controllers must be undertaken by
qualified staff who have been adequately trained by Siemens Building Technologies.
3.1 Basic concept
Using the RMK770, boiler sequencing can include up to 6 boilers. When selecting a
plant type, boiler sequencing with 2 boilers is predefined. The 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 sub-
sequently 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 configuration.
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 Konnex 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 on the “Extra configura-
tion” menu. For additional boilers, each plant element (burner stages, boiler sensor,
etc.) must be configured separately.
When a second RMK770 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 assigned 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 will automati-
cally be included as a boiler of the boiler sequence, to be displayed on the first RMK770
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

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Building Technologies Boiler Sequence Controller RMK770 CE1P3132en
HVAC Products 3 Commissioning 01.03.2005
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 Q42
Q73
Q74
Y2 G0
X7
D2MM
G1 G0G1
RMK770
T
There are 2 choices for integrating the third boiler:
Since the RMK770 does not have a sufficient number of outputs, an extension 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