Siemens LMU54 Series Basic Documentation page 60

Note
60/171
Siemens Building Technologies
HVAC Products
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:
S / W auto
&
S / W switch =
Auto
S / W switch =
winter (1)
Heat demand zone
Heat demand zone
per parameter
Heat demand HC1
Heat demand HC2
Absolute priority
DHW demand
Resulting heat demand of CM
A description of summer / winter changeover with the AGU2.310... is given in
CC1B7494.
Basic Documentation LMU54... / LMU64...
3 Functions
≥
1
&
≥
1
≥
1
&
&
Resulting
heat demand
≥
1
CC1P7494en
07.11.2002