Siemens Synco700 RMK770 Documentation Handbook page 38

Main flow sensor (TMnFl)
Main return sensor
(TMnRt)
MBRT return sensor
(TRtMx)
Consumer return
sensor (TRtCo)
Main pump A (MnPu_A)
Main pump B (MnPu_B)
Maintained boiler
return temperature
(MnVlvRtMx)
38/226
Building Technologies
HVAC Products
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Outputs
Operating line
Main pump
Main pump B
Maint boiler return temp 3-pos
Maint boiler return temp mod
* Here, the free inputs are available for selection
The main flow temperature is the main controlled variable of the boiler sequence and
must always be available with the boiler master (for more detailed information, refer to
section 3.5 "Several boiler sequence controllers RMK770").
If there is no main flow temperature sensor, the following configuration is used to adopt
the measured value inside the controller from the boiler sensor of the current lead boiler:
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Inputs > Main
flow sensor: autonomous
This variant can only be used with 2-boiler plant.
The main return temperature sensor is recommended for plant with pressureless
headers.
The MBRT return temperature sensor is required for minimum limitation of the return
temperature in connection with a common mixing valve (MnVlvRtMx). For this type of
application, the TMnRt sensor cannot be used.
When there is no mixing valve for the common maintained boiler return temperature,
the sensor for minimum limitation of the return temperature with action on the consum-
ers can be used.
The sensor can also be used for display purposes.
The return sensor on the consumer side can be used for frost protection for the plant.
Common main pump A (the menu item does not show designation "A").
Common main pump B if the common main pump is a twin pump.
Common 3-position or modulating mixing valve for minimum limitation of the boiler
temperature (for restriction regarding the 3-position output, refer to subsection 3.3.2
"Terminal assignment and properties of outputs").
For more detailed information, refer to chapter 6 "Boiler sequence management".
Boiler Sequence Controller RMK770
3 Commissioning
Range
RMK770..., RMZ7...*
Name
MnPu_A
MnPu_B
MnVlvRtMx
MnVlvRtMx
CE1P3132en
01.03.2005