TECHNICAL ASSISTANCE SERVICE
45
Compound outdoor temperature acts as a compensating variable in CH flow temperature control, and is linked to pre-
vailing meteorological conditions.
13
14
15
16
17
0
0
:
8
1
0
0
:
6
0
0
0
:
6
0
0
0
:
8
1
18:00
t
Te
Tea
Tec1
Tec0
°C
Compound outdoor temperature
Te - Outdoor temperature
Tea - Attenuated outdoor tem-
perature
Tec0 - Compound outdoor
temperature for heavy
duty buildings
Tec1 - Compound outdoor
temperature for light
duty buildings
Compound outdoor temperature is calculated from effective outdoor temperature and attenuated outdoor temperature.
It is calculated at 10 minute intervals on the basis of effective outdoor temperature and directly determines Summer/
Winter mode switching (par. 516).
Type of building selected
Compound outdoor temperature
Heavy duty (parameter 558-b1=1)
Tec = 1/2Te + 1/2Tea
Light duty (parameter 558-b1=0)
Tec = 3/4Te + 1/4Tea
13
14
15
16
17
0
0
:
8
1
0
0
:
6
0
0
0
:
6
0
0
0
:
8
1
18:00
t
Te
Tea
°C
Attenuated outdoor temperature
Te - Outdoor temperature
Tea - Attenuated outdoor
temperature
Содержание TAU 150 UNIT
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