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Building Technologies
Modular Heating Controller RMH760B
CE1P3133en
HVAC Products
6 Boiler temperature control
05.02.2007
If no checkback signal is received, an appropriate fault status message will be deliv-
ered. 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 deliv-
ered. 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 tem-
perature that is controlled, but the boiler temperature setpoint is shifted as a function of
the heat requests.
Checkback signal shut-
off 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
Modulating 3-position
burner
Modulating burner
Setpoint compensation
