Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Heat demand 03.10.2011
The settings have the following effect:
Plant
3140D37en
Plant stops
Impact of fault
Alarm
YES
NO
YES
NO
YES
NO
ON
OFF
Heat demand
Heat
available
Fault status
signal delay
No stop
If, with basic type A, the preheating function is active at the same time as the heat
demand signal, the fan is started only after the preheating time.
The "Fault signal delay time" should roughly equal the "Purge time max". If there is
still no heat supply after the purge time, a fault message appears.
25.4 Heat demand relay (Q )
Release for an external heating source, for example, can be connected to this
output.
The heat demand relay responds as soon as the assigned sequences or of "heat"
is demanded from other bus participants within the same heat distribution zone.
Meaning:
 Contact open = No heat demand
 Contact closed = Heat demand
Main menu > Commissioning > Extra configuration > Aggregates > Heat demand >
Operating line Adjustable values / remarks
Heat demand relay ---, N.Q1, N.Q2, ... / Activate output
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Heat demand >
Operating line Range Factory setting
Limit value request on 0...100% 10%
Limit value request off 0...100% 5%
Control action Slow, Medium, Fast Medium
Request evaluation Average, Maximum Maximum
Function diagram
Note
Purpose and function
Configuration