Siemens RVS41.813 User Manual page 200

Optg mode changeover
DHW assignment
Refrigeration request
Observe TA'limit ext
force
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Siemens Switzerland Ltd
HVAC Products
The range of action of operating mode changeover via input H is as follows:
• Local entry:
Local action; the local heating circuit is switched on and off
• Central entry:
Central action; depending on the setting made on operating line "Action changeover
functions", either the heating circuits in the segment or those in the entire system are
switched
Assignment of DHW heating is required only if it is controlled by a heating circuit time
program (refer to operating lines 1620 and 5061).
Settings:
• Local heating circuits:
DHW is only heated for the local heating circuit
• All heating circuits in the segment:
DHW is heated for all heating circuits in the segment
• All heating circuits in the system:
DHW is heated for all heating circuits in the system.
With all settings, controllers in holiday mode are also considered for DHW heating.
"Refrigeration request K28" sets the relay parameter at the QX.. for the output of the
refrigeration request.
Depending on the setting (locally / centrally) the request is delivered by the local
cooling circuit or all cooling circuits in the system. This option only applies to the device
with device address 1.
• Local entry:
Consideration is only given to local refrigeration requests
• Central entry:
Consideration is given to all refrigeration requests from the system
In the case of a cascaded plant, it is recommended to select "Always" on the cascade
master. This selection ensures that the cascade operating menus and common
functions (e.g. common return temperature control) will not be lost should a power
failure occur.
Additional generators connected via the LPB bus can be locked or released per its own
parameter based on the outside air temperature (e.g. air/water heat pump). This status
is distributed via LPB. The master therefore knows in a cascade whether an additional
generator (slave) is available per its own employment limits (outside air temperature or
not and can switch another generator accordingly.
No:
The Ecobit from the external generator is not observed.
Note: If an LMU control (slave) is connected as an additional generator, the parameter
must be set to "No"!
User manual RVS61.843, RVS41.813
6 The settings in detail
CE1U2355en_02
28. September 2009