Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Flow temperature, demand-controlled (basic type C) 03.10.2011
13.2.2 Limits and setpoint effects
The following function can have an effect on the setpoints:
 Universal shift
13.2.3 Priority of functions
When simultaneously activating different functions acting on the same controller,
the following priority applies:
1. Locking of sequences after heating/cooling changeover
2. Preheating function
3. Sequence locking acc to OT
4. Sequence limiter
5. General limiter
13.3 Chilled water precontrol
If the RMU7...B controller is used for chilled water precontrol, the subsequent
control loops can send their refrigeration demand signal via the bus to precontrol.
The RMU7...B controller can receive these signals and evaluate them, thus
ensuring optimum flow temperature control.
At the same time, a digital signal can also be accepted and evaluated from devices
without communication (see section 6.6 "Plant operating mode selection via
reques
t input (basic type P, C)").
13.4 Precontrol for 2-pipe system (H/C) with
summer/winter changeover
If the RMU7...B controller is used for the precontrol of a 2-pipe system, the main
control loops can send their heat / refrigeration demand signals via the bus to
precontrol. The RMU7...B controller can receive these signals and evaluate them,
thus ensuring optimum flow temperature control.
To activate the controller as hot/chilled water controller, the controller must be
configured as 2-pipe system heating/cooling (see section 27 "Heating/cooling
cha
ngeover").