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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 7 Boiler control 23.04.2009
This terminal can be used for the burner fault status message.
Also refer to section 7.13 “Boiler faults”.
For additional fault supervisions, there are 3 universal fault inputs available.
Also refer to section 7.13 “Boiler faults”.
Fault input for supervision of the boiler pump
Fault input for supervision of boiler pump B in the case of twin pumps.
Input for flow supervision of the boiler pump.
Control input, used to operate boiler 1 in individual operation.
Also refer to section 7.6 “Individual operation”.
7.2.1 Burner types
By selecting the plant type, the type of burner is predefined for 2 boilers of the boiler
sequence.
• Kx.1: 1-stage burner
• Kx.2: 2-stage burner
• Kx.3: Modulating 3-position
The relevant outputs are preconfigured.
The outputs can be changed in the extra configuration.
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 remaining free terminal pairs (Q1/Q2, Q3/Q4, Q5/Q6) for
the open and the close signal. Normally, special terminal pairs are required (RC unit for
radio interference suppression; for more detailed information, refer to subsection 3.3.2
“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 also be used 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 main flow
temperature.
Fault burner
Fault input 1…3
Boiler pump overload
Boiler pump B overload
Flow signal
Individual operation
Burner stage 1
Burner stage 2
Modulating 3-position
Modulating burner mod
Setpoint compensation
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