Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Temperature controller (basic type A) 03.10.2011
Main menu > Controller 1 >
Operating line Comments
Actual value room temp For room / supply air cascade control
Current room temp setpoint For room / supply air cascade control
Actual value extract air temp For extract air / supply air cascade control
Current setp extract air temp For extract air / supply air cascade control
Actual value supp air temp
Current supply air temp setpoint
11.6.3 Second fan speed by heat/refrigeration demand
If required, the room temperature controller can switch the fan to speed 2 to
provide more heating or cooling energy to the space. This can be activated
separately for heating and cooling. For the fan to be switched to speed 2, a 2-
speed fan must be configured (see section 10.1 "Fan (basic types A and P)"). The
fan is switch
ed according to the following diagram:
SpSu
III II
SpH SpC
RT
Fan speed
Heating Cooling
Supply air limit
value max
Supply air limit
value min
Current supply air
temp cooling setpoint
Current supply air
temp heating setpoint
3140D03en
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Controller 1 > Cascade controller >
Operating line Range Factory setting
[Speed 2] heat demand No, Yes No
[Speed 2] refrigeration demand No, Yes No
If the fan is also switched to speed 2 by the IAQ controller (see section 16), e.g.
when more outside air is required, the higher value is used (maximum selection).
Display values
Function diagram
Setting values
Note