Siemens Synco RMK770, Basic Documentation

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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 3 Commissioning 23.04.2009
3.4.1 Hydraulics-dependent inputs and outputs of function
block “Boiler sequence manager”
T
T
T
TRtCo TRtMn
BoPu_A
TBo
BuMnSt
BuMdltUp
BuMdltDn
BoPu
VlvShOff
VlvRtMx
31
3
2S
5
2
MnPu_A
T
T
TRtBo
TRtBo
BuSt1
BuSt2
TBo
T
T
TRtMx
MnVlvRtMx
T
TMnFl
T
T
T
PrCtrVlvMx
TRtPrCtr
TFlPrCtr
TPu_A
TFg
T
TFg
T
TPu_B
BoPu_B
MnPu_B
Boiler sequence management
The sensors and actuating devices in the highlighted part belong to function block
“Boiler sequence manager”.
The relevant plant components are activated by making an assignment to an input or
output terminal.
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Inputs
Operating line Range Name
Main flow sensor RMK770…, RMZ7…* TMnFl**
Main return sensor TMnRt**
Consumer return sensor TRtCo
MBRT return sensor TRtMx
* Here, the free inputs are available for selection
** These sensors are automatically configured when selecting the plant type (exception: Basic type K)
Main menu > Commissioning > Extra configuration > Boiler sequence manager > Outputs
Operating line Range Name
Main pump RMK770…, RMZ7…* MnPu_A
Main pump B MnPu_B
Maint boiler return temp 3-pos MnVlvRtMx
Maint boiler return temp mod MnVlvRtMx
* 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.
Main flow sensor (TMnFl)
Main return sensor
(TMnRt)
MBRT return sensor
(TRtMx)