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10.3.8 Prohibited combinations
You cannot directly connect a consumer and a primary controller to generation.
Example 1
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The universal controller receiving its conditions from "d"
or
"a", may not be
reconnected to the bus, as it would return its own heat demand to itself. As a result,
the plant would never again switch off.
Example 2
In the example below, controller 1 sends its heat demand to the heat distribution
zone and receives its very own demand from the same heat distribution zone.
N.Q1
Contrl.
157 / 216
Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
H/C demand, H/C changeover
01.04.2010