Siemens RMH760 User manual

CE1N3131en
03.07.2003
Siemens Building Technologies
HVAC Products
3131
Synco™700
Heating Controllers RMH760
• Heating controller for medium-size and large buildings. The RMH760 is used
as a heating circuit or primary controller. The controller is supplied with 105
preprogrammed heating plants
• Boiler temperature control, control of a second heating circuit and DHW heat-
ing with extension modules
• Menu-driven operation with separate operator unit (plug-in type or detached)
Use
• Office and administrative buildings
• Commercial buildings and shops
• Schools
• Hospitals
• Industrial buildings and workshops
• Apartment blocks and terraced houses
• Heating sections of ventilation and air conditioning plants
• Distribution zones of ventilation and air conditioning plants
• Heating systems with own heat source
• Heating zones of a larger plant
• Basic load heating systems
Buildings
Plants

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Functions
Several of the functions listed require extension modules.
Room operating modes are:
• AUTO: Automatic changeover between 3 setpoints according to the time program
• Comfort: Continuously heating to the Comfort setpoint
• Precomfort: Continuously heating to the Precomfort setpoint
• Economy: Continuously heating to the Economy setpoint
• Protective mode: Heating to the setpoint of Protective mode, if necessary
• Year clock with automatic summer-/wintertime changeover
• 7-day clocks for time program with a maximum of 6 switching points per day
• Holiday and special day program with 16 periods per year
• Selectable room operating mode for the holiday periods
• Selectable DHW operating mode for the holiday periods
• Time program for special days
2 ready configured inputs for:
• Flow temperature (averaging possible)
• Outside temperature
3 freely configurable inputs, optionally for:
• Reception of the following measuring signals:
− Room temperature (averaging possible)
− Return temperature
− Wind speed
− Intensity of solar radiation
• Connection of a remote setpoint adjuster with relative or absolute room setpoint
adjustment
• Connection of an external switch for:
− Operating mode changeover
− Timer function
− Changeover to holiday mode
− Changeover to special day
− Indication of faults
If more than 3 configurable inputs are required, extension modules must be used.
Remote operation with multifunctional room unit via Konnex bus
• Heating circuit controller
− Weather-compensated flow temperature control via the heating circuit mixing
valve, with adjustable setpoints of Comfort, Precomfort, Economy and Protective
mode
− Adjustable influence of room temperature, solar radiation and wind
− Optimized setback and heating up
− Boost heating and quick setback
− Automatic heating limit for demand-dependent control of the heating with adjust-
able heating limits for the Comfort and Economy modes
− Automatic changeover to summer operation (heating off)
− Room model for room functions without room sensor
• Primary controller
Demand-dependent precontrol via the mixing valve in the common flow, based on
the received heat demand signals
• Maximum limitation of the room temperature
• Minimum and maximum limitation of the flow temperature
• Minimum or maximum limitation of the return temperature
Note
Room operating modes
Clock functions
Holiday functions
Ready configured inputs
Freely configurable in-
puts
Note
Remote operation
Control functions
Limitation functions

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• Limitation of the rate of flow temperature increase
• Control of an actuator with 3-position or DC 0…10 V control
• Pump control (system or heating circuit pump)
• Control of maximum 2 twin pumps
• Indication of heat demand
• Configurable relays
• Mixing valve overrun, mixing valve kick
• Pump overrun, pump kick
• Outside temperature-dependent frost protection for the plant
• Frost protection for the building
• Overload supervision
• Fault relay
• Handling of status and error messages
• Outside temperature simulation
• Wiring test
• Storage and reset of parameter sets
• Demand-dependent boiler temperature control
• Boiler pump control
• Control of a 1- or 2-stage or modulating burner; modulating burner with 3-position or
DC 0…10 V control
• Control of a second heating circuit
• Maintained boiler return temperature with own mixing circuit
• Control of an actuator with 3-position or DC 0…10 V control
• Storage tank charging with charging pump, with or without mixing valve control
• Storage tank charging via internal or external heat exchanger
• Time programs for DHW heating and the circulating pump
• Operating modes: AUTO, continuously Normal, continuously Reduced, Protective
mode
• Legionella function
For a more detailed description of all controller functions, refer to Basic Documentation
P3131.
Type summary
Type of unit Type reference Data Sheet
Heating controller (default languages de, fr, it, es) RMH760-1 N3131
Heating controller (default languages de, en, fr, nl) RMH760-2 N3131
Heating controller (default languages sv, fi, no, da) RMH760-3 N3131
Heating controller (default languages pl, cs, sk, hu) RMH760-4 N3131
Operator unit, plug-in type RMZ790 N3111
Operator unit, detached RMZ791 N3112
Servicetool OCI700.1 N5655
Boiler module RMZ781 N3135
Heating circuit module RMZ782 N3135
DHW module RMZ783 N3135
Twin pump module RMZ786 N3145
Switching functions
Supervisory and protec-
tive functions
Service functions
Boiler functions (requir-
ing boiler module
RMZ781)
Second heating circuit
(requiring heating circuit
module RMZ782)
DHW functions
(requiring DHW module
RMZ783)
Note
Heating controller
Operator and service
units
Extension modules

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Universal module with 4 universal inputs and
4 relay outputs RMZ787 N3146
Universal module with 4 universal inputs and
2 analog and 2 relay outputs RMZ788 N3146
Module connector for detached extension modules RMZ780 N3138
Ordering
When ordering, please give type reference according to the above table.
The required operator unit and extension modules must be ordered as separate items.
Room units, sensors, actuator and valve must also be ordered separately.
Equipment combinations
Type of sensor Type of sensing
element, signal
Type reference Data Sheet
Outside sensor LG-Ni 1000 QAC22 N1811
Outside sensor NTC 575 QAC32 N1811
Strap-on temperature sensor LG-Ni 1000 QAD22 N1801
Immersion temperature sensor LG-Ni 1000 QAE2… N1791
Cable temperature sensor LG-Ni 1000 QAP21.3 N1832
Room temperature sensor LG-Ni 1000 QAA24 N1721
Room temperature sensor LG-Ni 1000 QAA64 N1722
Wind effect sensor DC 0…10 V QAV92 N1946
Solar impact sensor DC 0…10 V QLS60 N1943
Type of room unit Type reference Data Sheet
Room temperature sensor with setpoint adjuster QAA25 N1721
Room temperature sensor with setpoint readjuster QAA27 N1721
Room unit with Konnex interface QAW740 N1633
Type of remote setpoint adjuster Type reference Data Sheet
Remote setpoint adjuster, signal 0…1000 ΩBSG21.1 N1991
Remote setpoint readjuster, ±3 K BSG21.5 N1991
All types of electromotoric and electrohydraulic actuators from SBT HVAC Products can
be used:
• Operating on AC 24…230 V
• 3-position control
• DC 0…10 V modulating control
For detailed information about actuators and valves, refer to Data Sheets
N4000…N4999.
Product documentation
Type of document Number
Product Range Description S3110
Basic Documentation P3130
Installation instructions 74 319 0344 0
Operating Instructions (de, en, fr, nl) 74 319 0346 0
Declaration of Conformity (CE) T3110
Environmental Declaration E3110…01
Suitable sensors
Suitable room units
Suitable remote
setpoint adjusters
Suitable actuators

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Technical design
The controller is supplied with 28 basic types of heating plant preprogrammed. They
have been selected to cover the majority of standard applications. Some of them re-
quire extension modules.
When commissioning a plant, the relevant basic plant type must be entered. All associ-
ated functions, terminal assignments, settings and displays will automatically be acti-
vated, and parameters not required will be deactivated.
Precontrol can only be provided by the controller. There are 2 choices:
With mixing valve: With system pump:
P1 P2
3131S01
Y1
B1
M1
B7*B7
3131S02
B1*
M1
B1 Flow temperature sensor
B1* Flow temperature sensor
(optional, for display only)
B7 Return temperature sensor (op-
tional, for minimum limitation)
B7* Return temperature sensor (op-
tional, for maximum limitation)
M1 System pump (can be a twin
pump)
Y1 Mixing valve
Measuring input B7 for the return temperature can be configured for either minimum or
maximum limitation.
The control of 1 or 2 heating circuits can be provided either by the controller or the
RMZ782 heating circuit module. The available choices are the same with both types of
unit, provided the required connection terminals for the desired auxiliary function are
present.
Please also note the following:
• If the controller and heating circuit module do not have a sufficient number of config-
urable connection terminals, an additional extension module can be used
• If the controller is used as a primary controller, the RMZ782 heating circuit module
must be used for the control of the heating circuit
• A second heating circuit must be controlled with the RMZ782 heating circuit module
• Measuring input B7 for the return temperature can be configured for either minimum
or maximum limitation
Y1
M1
B1
B7
B7*
B9
A5
B5
B91
B92
3131S39
R5
A5 Room unit (optional)
B1 Flow temperature sensor
B5 Room temperature sensor (optional)
B7 Return temperature sensor (optional, for minimum limitation)
B7* Return temperature sensor (optional, for maximum limitation)
B9 Outside sensor
B91 Solar impact sensor (optional)
B92 Wind effect sensor (optional)
M1 Heating circuit pump (can be a twin pump)
R5 Remote setpoint adjuster (optional)
Y1 Mixing valve
Mode of operation
Use of individual de-
vices
Precontrol
Heating circuit control

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Boiler temperature control requires the RMZ781 boiler module. There are three
choices:
Pump in the flow: Boiler pump in the bypass:
G1 G2
3131S03
B2
M2
B7
3131S04
B2
M2 B7
B2 Boiler temperature sensor
B7 Return temperature sensor
(optional, for minimum limitation)
M1 Boiler pump or system pump
(can be a twin pump)
M2 Bypass pump (can be a twin
pump)
In plants with maintained boiler return temperature with own mixing valve, the following
types of modules are required, in addition to the controller:
• Heating circuit module RMZ782; it controls the boiler return temperature via a mixing
valve, depending on the temperature acquired with B1. The module also controls
boiler pump M1
• Boiler module RMZ781; this module controls the boiler temperature depending on
the temperature acquired with B2, and also controls system pump M2
One of the basic types 4–… must be selected on the controller.
G3
3131S41
M2
RMZ782
RMZ781
B2
B1
M1
Y1
Y2
B1 Boiler return temperature sensor (controlled variable)
B2 Boiler temperature sensor
M1 Boiler pump (can be a twin pump)
M2 System pump (can be a twin pump)
Y1 Mixing valve
Y2 Balancing valve
DHW heating requires the RMZ783 DHW module. There are 5 choices:
DHW1 DHW2
3131S34
M4
B41
B4
E7
M3
E7
3131S35
M3
M4
B41
B4
Y5
B3
DHW3 DHW4
3131S36
M3
M4
B3
Y5
E7
B41
B4
3131S37
M3
M4
B3
Y4
B41
M5
B31 E7
B4
Boiler temperature control
Maintained boiler return
temperature
DHW heating

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HVAC Products 03.07.2003
DHW5
3131S38
M3
M4
B3
B41
B4
M5
B31 E7
B3 Charging temperature sensor
B31 Primary flow temperature sensor (optional)
B4 Storage tank sensor at the top
B41 Storage tank sensor at the bottom (optional)
E7 Electrical immersion heater (optional)
M3 Charging pump (can be a twin pump)
M4 Circulating pump (optional)
M5 Primary pump (can be a twin pump)
Y5 Mixing valve or 2-port valve
The illustrations contained in this section use the following symbols for precontrol,
boiler temperature control and DHW heating:
Precontrol Boiler temperature control DHW heating
3131S07
RMH760
0-1
RMZ783
3131S05
RMH760
0-2
3131S08
0-3
RMH760
RMZ783
3131S06
RMH760
0-4
RMZ782
0-5
3131S09
RMZ783 RMH760 RMZ782
With all basic types 1–x, primary controller variants P1 and P2 can be selected.
3131S13
RMH760
1-1
RMZ783
RMH760
1-2
RMZ782
3131S11
RMH760
1-3
RMZ782
3131S14
RMZ783 RMH760
1-4
RMZ782
3131S12
RMZ782
Basic types
Note on illustrations
Basic types 0–x
Basic types 1–x

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HVAC Products 03.07.2003
RMH760
1-5
3131S15
RMZ782
RMZ783 RMZ782
With all basic types 2–x, primary controller variants P1 and P2 can be selected.
RMH760
2-0
3131S42
RMH760
2-1
RMZ783
3131S19
RMH760
2-2
RMZ782
3131S17
3131S20
RMH760
2-3
RMZ782RMZ783 RMH760
2-4
RMZ782 RMZ782
3131S18
RMH760
2-5
RMZ782RMZ782
3131S21
RMZ783
With all basic types 3–x, boiler pump variants G1 and G2 can be selected.
RMZ781
3-0
RMH760
3131S22
RMZ783RMZ781
3-1
RMH760
3131S25
RMZ781
3-2
3131S23
RMH760 RMZ781
3-3
RMH760
3131S26
RMZ783
Basic types 2–x
Basic types 3–x

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HVAC Products 03.07.2003
3-4
RMH760 RMZ782RMZ781
3131S24
3-5
3131S27
RMH760RMZ781 RMZ783 RMZ782
For minimum limitation of the boiler return temperature, basic types 4–x have their own
mixing circuit.
For minimum limitation of the boiler return temperature, basic types 4–x have their own
mixing circuit
3131S28
RMH760RMZ782
RMZ781
4-0
3131S31
RMH760
RMZ782
4-1
RMZ781
RMZ783
RMH760
RMZ782
4-2
3131S29
RMZ781
RMZ782
RMZ781
4-3
RMH760
3131 S32
RMZ783
3131S30
RMZ782
RMH760
RMZ782
4-4
RMZ781
3131S33
RMZ782
4-5
RMZ781
RMZ782
RMH760
RMZ783
Mechanical design
The controller consists of terminal base and controller insert. It has a plastic housing
with the printed circuit boards, 2 terminal levels and carries the connecting elements
(electrical and mechanical) for an extension module.
The controller can be fitted to a top hat rail conforming to EN 60 715-TH35-7.5, or can
be mounted directly on a wall.
Basic types 4–x
Basic design

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Operation takes place with either a plug-in type or detached operator unit (refer to sec-
tion "Type summary").
3144Z01
123
45 67 8 5 10
9
11
11
1 Connection facility for the service interface (RJ45 socket)
2 Connection facility for the operator unit (with removable cover)
3 LED (green) for indication of operation
4 Fault button with LED (red) for indication of faults and for resetting
5 Openings for plug-in type operator unit RMZ790
6 Button for assignment of the device address
7 LED (red) for indication of the programming process
8 Mounting facility for fitting the controller to a top hat rail
9 Fixing facility for a cable tie
10 Electrical and mechanical connection elements for the extension module
11 Rest for the terminal cover
Engineering notes
• The controller operates on AC 24 V. Operating voltage must conform to the require-
ments of SELV/PELV (safety extra low-voltage)
• The transformers used must be safety isolating transformers featuring double insula-
tion to EN 60 742 or EN 61 558-2-6; they must be suited for 100 % duty
• Fuses, switches, wiring and grounding must be in compliance with local regulations
• Sensor wires should not be run parallel to mains carrying cables powering actuators,
pumps, etc.
• The controller can be used with a maximum of 4 extension modules
• The reference room for control with a room temperature sensor should be the room
that cools down quickest. That room may not be equipped with thermostatic radiator
valves; manual valves must be locked in their fully open position
Mounting and installation notes
• Controllers and extension modules are designed for:
− Mounting in a standard cabinet as per DIN 43 880
− Wall mounting on an existing tophat rail (EN 50 022-35×7.5)
− Wall mounting using two fixing screws
− Flush panel mounting
• Not permitted are wet or damp spaces. The permissible environmental conditions
must be observed
• If the controller shall not be operated inside a control panel, use the detached opera-
tor unit RMZ791 in place of the plug-in type operator unit RMZ790
• Disconnected the system from the power supply prior to mounting and installation
the controller
• The controller insert may not be removed from the terminal base!
• If extension modules are used, they must be attached to the right side of the control-
ler in the correct order. This means in agreement with ascending type reference
Operating, indicating
and connecting ele-
ments