Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
The wind speed sensor is to be configured via "Extra configuration". If required, the
controller’s DC 0…10 V input is to be matched to the sensor output.
DC 0…10 V
≅ 0…20 m/s is the factory setting.
Setting of the wind influence must always be matched to the location of the building.
The setting to be made is the room temperature drop
∆TrwdNorm resulting from a wind
speed of 20 m/s at a room temperature of 20 °C and the design temperature A, which
corresponds to the lower curvepoint.
Based on this parameter and the current (slightly) attenuated wind speed, the controller
calculates the flow temperature readjustment
∆TFl due to the wind.
∆TFl =
Vwd – 0.8
×
SpTR – TO
× ∆TRwdNorm × (sHc + 1)
19.2
20 – TODE
9.5.4 Heating limit switch
The heating limit switch is capable of deactivating the heating circuit pump and of
shutting down the supply of heat to the heating circuit.
This prevents the waste of heating energy at higher outside temperatures.
To determine the heating limit, the following outside temperature values are taken into
consideration (refer to subsection 9.5.1 "The composite and the attenuated outside
temperature"):
• The actual outside temperature TO
• The composite (effectively used) outside temperature TOeff
• The attenuated outside temperature TostrDmp
Main menu > Commissioning > Settings > … or
Main menu > Settings > Heating circuit 1 (or 2 or 3) > Space heating
Operating line
Range
Factory setting
Comfort heating limit
---- / –5…25 °C
17 °C
Economy heating limit
---- / –5…25 °C
5 °C
Heat limit with Comfort preset
Inactive / Active
Inactive
The following applies:
• If the Comfort heating limit is set to "----" (none), a heating limit will only exist in
Economy mode
and Protection mode . There will be no change to summer
operation
• If the Economy heating limit is set to "----" (none), the Comfort heating limit will be
active in Economy mode
and Protection mode
• If all 3 temperatures lie 1 °C below the Comfort heating limit, heat will be delivered in
Comfort mode
and Precomfort mode
• If one of the 3 temperatures lies above the Comfort heating limit, the delivery of heat
will be locked
• If all 3 temperatures lie 1 °C below the Economy heating limit, the delivery of heat
will be released in Economy mode
and Protection mode
• If one of the 3 temperatures lies above the Economy heating limit, the delivery of
heat will be locked
Settings
Comfort heating limit
Economy heating limit