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Siemens Building Technologies Basic Documentation LMU54... / LMU64... CC1P7494en
HVAC Products 3 Functions 07.11.2002
If no HMI is connected or if the HMI has no S / W switch, the decision on locking /
releasing is made exclusively via automatic S / W changeover.
If the system does not use an outside sensor either, all heating circuits will be released.
The following illustration shows the CM’s demand for heat in connection with automatic
S / W changeover:
1
≥
&
7494b07E/0702
Resulting
heat demand
S / W auto
S / W switch =
Auto
S / W switch =
winter (1)
1
≥
Heat demand HC1
Heat demand HC2
Absolute priority
DHW demand
1≥
&
&
1
≥
&
Heat demand zone
Heat demand zone
per parameter
Resulting heat demand of CM
A description of summer / winter changeover with the AGU2.310... is given in
CC1B7494.
Note
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