User Manual

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Fan speed controller, demand-controlled (basic type P) 03.10.2011
See chapter 23.4
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Operating line Range Factory setting
Pressure optimization None, Supply air, Supply-
extract air parallel, Supply
and extract air
None
A Pressure setpoint and a Pressure setpoint reduction can be set. The pressure
setpoint corresponds to the design pressure for the plant at full load. The pressure
setpoint reduction determines the maximum pressure reduction based on the
evaluated damper position that impacts the pressure setpoint.
The Pressure setpoint reduction is switched off by default (= 0). The setting value
"Speed min" is used to ensure that a minimum speed is maintained.
The evaluated damper positions are controlled to the setpoint VAV supply air
dampers or setpoint VAV extract air dampers.
Damper position influence on pressure setpoint compensation
 Case 1: Evaluated damper position > Setpoint VAV damper position
The pressure control supplies the plant with the optimum pressure setpoint. No
reduction or increase in the pressure setpoint is required; there is no potential for
optimization.
 Case 2: Evaluated damper position < Setpoint VAV damper position
The pressure control supplies the plant with a pressure setpoint that is too high.
Potential for optimization exists. The pressure setpoint is reduced based on the
present damper position or the setting value for pressure setpoint reduction.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Main menu > Settings > Aggregates > Extract air fan >
Operating line Range Factory setting
Pressure setpoint Depending on the selected input
identifier
500 Pa / 30 mbar / 3 bar
Pressure setpoint reduction Depending on the selected input
identifier
0 Pa / 0 mbar / 0 bar
Pressure controller Xp Depending on the selected input
identifier
500 Pa / 50 mbar / 5 bar
Pressure controller Tn 00.00…10.0 m:s 02.00 m:s
Speed min 0…100 % 0%
Setpoint VAV supp air dampers 0…100% 80%
Setpoint VAV extr air dampers 0…100% 80%
Application examples
Setting values
Setting values