Hydraulics-Dependent Inputs And Outputs Of Function Block "Precontrol - Siemens Synco 700 Series Basic Documentation

Boiler sensor (TBo)
Return sensor (TRtBo)
Flue gas temperature
sensor(TFg)
Burner stage 1 (BuSt1)
Burner stage 2 (BuSt2)
Modulating burner
(BuMdltUp/Dn)
Setpoint compensation
(BoSetpt)
Boiler pump A (BoPu_A)
Boiler pump B (BoPu_B)
Shutoff valve (VlvShOff)
Maintained boiler return
temperature (VlVRtMx)
Building Technologies
HVAC Products
The boiler temperature sensor is used as a control sensor for the boiler temperature
setpoint. It is mandatory for minimum and maximum limitation of the boiler temperature
and for modulating burners.
The boiler return temperature sensor is used as a control sensor for maintained boiler
return temperature with mixing valve.
The flue gas temperature sensor is used for supervision of the flue gas temperature.
1st burner stage or basic stage for modulating burners.
2nd burner stage for modulating burners.
Modulating burner with 3-position or modulating control (for restriction with 3-position
output, refer to subsection 3.3.2 "Terminal assignment and properties of outputs").
Compensation of boiler temperature setpoint DC 0...10 V for boilers with own boiler
temperature control.
Boiler pump A, the pump's function can be selected: Boiler pump or bypass pump.
Boiler pump B, if the boiler pump is a twin pump.
Shutoff valve.
3-position or modulating mixing valve for maintained boiler return temperature (for
restriction with 3-position output, refer to subsection 3.3.2 "Terminal assignment and
properties of outputs").
For more detailed information, refer to chapter 7 "Boiler control".
3.4.3 Hydraulics-dependent inputs and outputs of function
block "Precontrol"
TFg
TFg
T
TBo
T
T
BuMdltUp
BuSt1
BuMdltDn
BuSt2
_B
TRtBo
T
BoPu_A
VlvShOff
VlvRtMx
Main menu > Commissioning > Extra configuration > Primary controller > Inputs
Operating line
Flow sensor
Return sensor
* Here, the free inputs are available for selection
Boiler sequence controller RMK770
3 Commissioning
MnPu_A
TBo
T
MnPu_B
BuMnSt
TRtBo
T
BoPu
TRtMx
T
MnVlvRtMx
Range
RMK770..., RMZ7...*
Primary control
PrCtrVlvMx
T
TRtPrCtr
TFlMn
T
TRtMn TRtCo
T
T
Name
TFlPrCtr
TRtPrCtr
TFlPrCtr
TPu_A
T
TPu_B
T
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CE1P3132en
23.04.2009