Composite Outside Temperature Taxgem - Siemens SIGMAGYR RVP540 Basic Documentation

Benefit
Description
Setting
Process
Effect
Example
Siemens Building Technologies
HVAC Products

4.199 Composite outside temperature TAxgem

• Compensating variable for the flow temperature control
The composite outside temperature is a mixture of the actual outside temperature and
the attenuated outside temperature as calculated by the controller.
This operating line automatically displays the actual value [°C] of the composite outside
temperature. No direct setting can be made.
Display
-50...50
The mixture of actual and attenuated outside temperature is dependent on the type of
building construction (setting 725) and is generated as follows:
Selected type of construction
Heavy (setting 725 = 0)
Light (setting 725 = 1)
The composite outside temperature as a compensating variable acts on flow tempera-
ture control, that is thus matched to the prevailing weather conditions.
It also acts on the 24-hour heating limit to shut down the heating.
TA
TAgem1
°C
TAgem0
17
16
15
14
13
18:00 06:00
TAakt Actual outside temperature
TAged Attenuated outside temperature
TAgem1 Composite outside temperature for light building structures
TAgem0 Composite outside temperature for heavy building structures
Basic Documentation RVP540 / RVP550
Description of the heating engineer settings
Unit
°C
Composite outside temperature
Tagem = ½ TAakt + ½ TAged
Tagem = ¾ TAakt + ¼ TAged
TAakt
TAged
18:00 06:00
t
18:00
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CE1P2488en
18.10.2002