Siemens RMH760 User Manual
CE1N3131en
03.07.2003
Siemens Building Technologies
HVAC Products
3
131
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
2/16
Siemens Building Technologies Data sheet RMH760 CE1N3131en
HVAC Products 03.07.2003
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 inputs
Note
Remote operation
Control functions
Limitation functions
3/16
Siemens Building Technologies Data sheet RMH760 CE1N3131en
HVAC Products 03.07.2003
• 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 protective functions
Service functions
Boiler functions (requiring 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
4/16
Siemens Building Technologies Data sheet RMH760 CE1N3131en
HVAC Products 03.07.2003
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 Ω
BSG21.1
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
5/16
Siemens Building Technologies Data sheet RMH760 CE1N3131en
HVAC Products 03.07.2003
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 require extension modules.
When commissioning a plant, the relevant basic plant type must be entered. All associated functions, terminal assignments, settings and displays will automatically be activated, 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 devices
Precontrol
Heating circuit control
Loading...