Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 5 General functions, fundamentals 2017-09-29
5.8 Pump control and twin pumps
Every pump (main pump, boiler pump, system pump, heating circuit pump) can be
monitored with a flow switch and an associated fault input.
Also, every pump can be a twin pump.
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The decision whether the pump to be installed shall be a single or twin pump is made
via "Extra configuration" at the respective function block (heating circuit, DHW, primary
controller, main controller, boiler).
Main menu > Commissioning > Extra configuration > Heating circuit 1 (or 2 or 3) > Outputs
Main menu > Commissioning > Extra configuration > DHW > Outputs
Main menu > Commissioning > Extra configuration > Primary controller > Outputs
Main menu > Commissioning > Extra configuration > Main controller > Outputs
Main menu > Commissioning > Extra configuration > Boiler > Outputs
Operating line
Adjustable values / display / remarks
…pump
Assign terminal
…pump B
Assign terminal
When both outputs (pump and pump B) are configured, the pump used is a twin pump.
A fault input is also available for pump B. The flow switch is used by both pumps.
Main menu > Commissioning > Extra configuration > Heating circuit 1 (or 2 or 3) > Inputs
Main menu > Commissioning > Extra configuration > DHW > Inputs
Main menu > Commissioning > Extra configuration > Primary controller > Inputs
Main menu > Commissioning > Extra configuration > Main controller > Inputs
Main menu > Commissioning > Extra configuration > Boiler > Inputs
Operating line
Adjustable values / display / remarks
[…pump] overload
Assign terminal
[…pump B] overload
Assign terminal
Flow signal pump
Assign terminal
If a twin pump was configured, the relevant function block will show menu item Twin
pump.
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Twin pump
Main menu > Settings > DHW > Primary twin pump (or Secondary twin pump or Circulating
twin pump)
Main menu > Settings > Primary controller > Twin pump
Main menu > Settings > Main controller > Twin pump
Outputs
Inputs
Setting