Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
Main menu > Commissioning > Extra configuration > Heating circuit 1 (or 2 or 3) > Outputs
Operating line
Adjustable values / display / remarks
Outside temperature relay*
Mixing valve 3-pos
Mixing valve modulating
Heating circuit pump
Heating circuit pump B
Heating limit relay
Operating mode relay 1
Operating mode relay 2
* Outside temperature relay:
Only heating circuits 2 and 3 have their own outside temperature. Heating circuit 1 shares the outside
temperature with other function blocks in the controller. The outside temperature relay for the outside
temperature of heating circuit 1 is to be configured under Miscellaneous > Outputs.
9.2.1 3-position or modulating mixing valve
Control of the mixing valve can be accomplished either with a 3-position or DC 0…10 V
actuator. The type of actuator is to be selected via "Extra configuration".
The output is to be activated via "Extra configuration":
Main menu > Commissioning > Extra configuration > Heating circuit 1 (or 2 or 3) > Outputs >
Mixing valve 3-pos Assign terminal
Main menu > Commissioning > Extra configuration > Heating circuit 1 (or 2 or 3) > Outputs >
Mixing valve 3-pos Assign terminal
9.2.2 Pump control
The heating circuit pump offers the same choices as all the other pumps. An
individual pump can also be monitored; optionally, a twin pump can be used as a
heating circuit pump. For that, the relevant output must be configured.
For more detailed information, refer to section 5.8 "Pump control and twin pumps".
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > 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
The illustration refer to section 9.3.7 shows the priorities of the different interventions
via digital inputs, via the KNX bus as well as operation on the controller or the QAW740
room unit.
The heating circuit pump is switched on according the priorities. Following functions
can still switch off the heating circuit pump:
• Quick setback (refer to section 9.7.3)
• Maximum limitation of the room temperature (refer to section 9.8.1)
• Heating limit switch (refer to section 9.5.4)
Outputs
Extra configuration
Fault settings in the
heating circuit
Note