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Building Technologies
Boiler sequence controller RMK770
CE1P3132en
HVAC Products
3 Commissioning
23.04.2009
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“
T
T
T
TRtCo
TRtMn
BoPu_A
TBo
BuMnSt
BuMdltUp
BuMdltDn
BoPu
VlvShOff
VlvRtMx
MnPu_A
T
T
TRtBo
TRtBo
BuSt1
BuSt2
TBo
T
T
TRtMx
MnVlvRtMx
T
TFlMn
T
T
T
PrCtrVlvMx
TRtPrCtr
TFlPrCtr
TPu_A
TFg
T
TFg
T
31
32
S
5
4
_B
MnPu_B
TPu_B
Primary control
Main menu > Commissioning > Extra configuration > Primary controller > Inputs
Operating line
Range
Name
Flow sensor
RMK770…, RMZ7…*
TFlPrCtr
Return sensor
TRtPrCtr
* Here, the free inputs are available for selection
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)