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Inputs
Outputs
98/226
Building Technologies
HVAC Products
7
Boiler temperature control
7.1
Function block overview
a
a
d
d
a
d
d
Stage
Modulating
1. 2.
Q Q
Y
TBo
TRtBo
Release Bo
BuFb
BuMdltFb
ShOffVlvFb
TFg
InFgMs
ErBu
Er1 (WLoLeDet)
Er2 (PMaxMon)
Er3 (PMinMon)
BoPuEr_A
BoPuEr_B
BoPuErFlow
InIndOp
BuSt1
BuSt2
BuMdltUp
BuMdltDn
BuMdlt_ DC 0...10 V
BoSetpt
BoPu_A
BoPu_B
VlvShOff
VlvRtMxUp
VlvRtMxDn
VlvRtMx_DC 0...10 V
Boiler Sequence Controller RMK770
7 Boiler temperature control
d d
a d
d
d
Boiler-
pump
Boiler 1
MBRT
B
Q
Q
Q
Y
Boiler temperature sensor
Return temperature sensor
Boiler release input
Checkback signal burner stage 1
Checkback signal modulating burner, current burner output
Checkback signal shutoff valve
Flue gas temperature sensor
Control input flue gas measurement
Fault input burner fault
Fault input 1 (water shortage)
Fault input 2 (maximum pressure)
Fault input 3 (minimum pressure)
Fault input boiler pump A
Fault input boiler pump B
Fault supervision boiler pump
Individual operation
Burner stage 1
Burner stage 2
Burner modulating on
Burner modulating off
Burner modulating DC 0...10 V
Boiler temperature setpoint DC 0...10 V
Boiler pump A
Boiler pump B
Shutoff valve
Maintained boiler return temperature on
Maintained boiler return temperature off
Maintained boiler return temperature modulating DC 0...10 V
d
d
d
B
V
Y
CE1P3132en
01.03.2005
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