Composite Outside Temperature - Siemens RVA63.280 Basic Documentation

Benefit
Description
Process
Effect
Example
Siemens Building Technologies
Landis & Staefa Division
4.6

Composite outside temperature

Compensating variable for 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.
The mixture of actual and attenuated outside temperature is dependent on the type of
building construction (setting 113) and is generated as follows:
Selected type of construction
Heavy (setting 113 = 0)
Heavy (setting 113 = 1)
The composite outside temperature as a compensating variable acts on flow
temperature 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
°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 Dokumentation RVA63.280, RVA53.280
composite outside temperature
Tagem = ½ TAakt + ½ TAged
Tagem = ¾ TAakt + ¼ TAged
TAakt
TAgem1
TAged
18:00 06:00 18:00
t
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CE1P2374E
19.04.2001