Basic Documentation

65/256
Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 6 Boiler temperature control 2017-09-29
If no checkback signal is received, an appropriate fault status message will be
delivered. In addition, the burner will be started only if the shutoff valve's checkback
signal indicates a fully open valve.
If no checkback signal is received, an appropriate fault status message will be
delivered. For more detailed information, refer to section 6.9.
Using the flue gas temperature sensor, the flue gas temperature can be displayed and
monitored.
For more detailed information, refer to section 6.7 "Flue gas temperature supervision".
With the flue gas measuring mode contact, function "Flue gas measuring mode" can be
activated at the boiler.
For more detailed information, refer to section 6.7.
This terminal can be used for the burner’s fault status message.
For more detailed information, refer to section 6.9 "Boiler faults".
For additional fault supervision functions, there are 3 fault inputs available.
For more detailed information, refer to section 6.9.
Fault input for monitoring the boiler pump.
Fault input for monitoring boiler pump B in the case of twin pumps.
Input for monitoring boiler pump flow.
6.2.1 Burner types
Selection of a plant type with boiler means that a 1-stage burner will be preselected.
Using "Extra configuration", other boiler types can be selected by configuring additional
outputs:
• 1-stage burner (factory setting)
• 2-stage burner
• Modulating burner
• Setpoint compensation
First burner stage or basic stage of a modulating burner.
Second burner stage
Configuration of a pair of terminals for a modulating 3-position burner.
Available for selection are the free pairs of terminals with special RC radio interference
suppression; for details, refer to subsection 3.2.2 "Terminal assignment and properties
of outputs".
DC 0…10 V output for a modulating burner.
DC 0…10 V output as a boiler temperature setpoint for an external boiler temperature
controller.
If no control of the burner is required, the DC 0…10 V output can be used in place of
the burner for setpoint compensation of a boiler. In that case, it is not the boiler
temperature that is controlled, but the boiler temperature setpoint is shifted as a
function of the heat requests.
Checkback signal
shutoff valve
Flue gas temperature
sensor
Flue gas measuring
mode contact
Burner fault
Fault inputs 1…3
Overload boiler pump
Overload boiler pump B
Flow signal
Burner stage 1
Burner stage 2
Mo
dulating 3-position
burner
Modulating burner
Setpoint compensation