Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Aggregates 03.10.2011
10.1.4 Variable-speed fan
Assign fixed speeds for 1 or 2-speed operation
Rather than relay outputs, the fan speeds for the variable speed drive are output
via a 0…10 V signal. Fixed speeds can be assigned to both speeds. At the same
time, the IAQ controller is responsible for speed control (see section 16 "IAQ
controlle
r (basic types A and P)"). There is a maximum selection.
Normally, the operating modes are assigned to the speeds as follows:
Operating mode Fan
Comfort:
Speed 2
Precomfort:
Speed 1
Economy:
Off
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Supply air fan >
Main menu > Settings > Aggregates > Extract air fan >
Operating line Range Factory setting
Step 1 0...100% 30%
Step 2 0...100% 70%
For 1-speed operation, the setpoints for Speed 1 and Speed 2 are the same.
If fixed speeds are not desired via operating modes, but the fan is to be
continuously controlled via air quality instead, 0% must be set for both speeds.
If the IAQ controller requests a higher speed, the speed is increased continuously
(see section 16.5 Increase fan speed (basic types A, P)).
Setting values
Note