Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 8 Main controller and primary controller 2017-09-29
Primary controller type 1 with mixing valve or heat exchanger with 2-port valve offers
maximum limitation of the return temperature while primary controller type 2 only
provides control of a system pump depending on demand.
The flow or return temperature sensor of primary controller type 2 can be used for
display purposes.
By configuring the outputs, it is determined whether primary controller type 1 or 2 is used.
Without configuration of a mixing valve, primary controller type 2 is automatically used.
But a flow temperature increase can also be defined with primary controller type 2 to
compensate for temperature losses in the case of long pipes. For more detailed
information about flow temperature increase, refer to section 8.7 "Setpoint increase".
8.3.1 Mixing valve control
For control of the mixing valve, a 3-position or DC 0…10 V actuator can be used. The
selection is made by configuring the relevant output.
8.3.2 Pump control
Pump control offers a number of monitoring choices independent of whether the pump
is a single pump or twin pump.
For more detailed information about pump control and twin pumps, refer to section 5.8
"Pump control and twin pumps".
Main menu > Commissioning > Settings > … or
Main menu > Settings > Main controller > Fault settings > Overload pump
Operating line
Range
Factory setting
Fault acknowledgement None / Acknowledge /
Acknowledge and reset
Acknowledge
and reset
Fault acknowledgement B None / Acknowledge /
Acknowledge and reset
Acknowledge
and reset
Main menu > Commissioning > Settings > … or
Main menu > Settings > Primary controller > Fault settings > Overload pump
Operating line
Range
Factory setting
Fault acknowledgement None / Acknowledge /
Acknowledge and reset
Acknowledge
and reset
Fault acknowledgement B None / Acknowledge /
Acknowledge and reset
Acknowledge
and reset
8.4 Plant operation
Plant operation indicates whether the primary controller is switched on and whether the
pump is running.
Main menu > Main controller > Plant operation
Main menu > Primary controller > Plant operation
Operating line
Range
Factory setting
Preselection
Auto / Off*
Auto
Setp preselection manual**
---- / 8…140 °C
----
State
Off / On
Cause
Commissioning /
Request /
Fault setting primary
controller
Fault setting main
controller
Plant operation