Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Heat demand 03.10.2011
The heating/cooling changeover function must be activated to send the head
demand collected in the heat distribution zone to a heat generator and to issue a
"Heat distr zone source side". Heat demand can also be issued modulating via the
heat demand relay or heat demand.
Main menu > Commissioning > Communication > Distribution zones >
Operating line Range Factory setting
Heat distribution zone 1…31 1
Heat distr zone source side ----, 1…31 ----
The signal is sent as heat demand. Heat demand is made up of the current
setpoint of controller 1 and a temperature boost. The temperature boost helps
compensate line losses.
Main menu > Commissioning > Communication > Distribution zones >
Operating line Range Factory setting
Heat demand setpoint
increase
0...50 K 0 K
A feedback signal via communication with information about the available amount
of heat is not possible.
25.3 Supervision (basic types A, P, U)
The heat feedback signal can be fed to this input.
Main menu > Commissioning > Extra configuration > Aggregates > Heat demand >
Operating line Adjustable values / remarks
Supervision ---, N.X1, N.X2, ... /
Activate function "Supervision"
The feedback signal can be fed via an input such as a thermostat in the flow which
switches at temperatures >15 °C, or via an analog input such as a LG-Ni1000
sensor in the flow which signals heat at temperatures >15 °C.
In the case of a digital input:
Normally closed = No heat available
Operating position = Heat available
In the case of the analog input, only inputs in °C can be configured. A limit value
can be entered. Below this limit value, heat is considered unavailable.
If there is no heat after an adjustable period of time (fault status message delay), a
fault message is generated. In addition, setting value "Fault effect" allows for
selecting if the plant should be switched on.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Heat demand >
Operating line Range Factory setting
Limit value 0...50 °C 15 °C
Fault status message delay 00.00...59.55 m:s 30.00 m:s
Impact of fault No stop, Stop No stop
If the plant is to switch off in the event of fault, no more heat demand is signaled.
Setting values
Setting values
Configuration
Setting values
Note