9
E 136 - XTA 624 C1 Eng.
22.11.10 AM REV. 02
We reserve the right to make changes without notice
COSTER
15.3 Control through room detector (B3) only or discharge air detector (B1) only
The controller compares the values and if B3 is used
or and if B1 is used
against the temperature measured by detector B1 or B3, and
calculates the load values for Heating QHea and for Cooling
QCoo according to the deviation measured.
15.
4 Control through room detector (B3) and discharge air detector (B1)
The controller compares the values: and
against the temperature measured by detector B3, and calculates the load values for desired flow
temperatures for Heating T°fHea and for Cooling T°fCoo according to the deviation measured and
values set:
• Min : – – c Max : – – c = Heating flow temp. min
and max values determine the PbHea propor
-
tional band’s range.
The minimum value T°fminHea helps eliminate
annoying cold drafts in the room. To prevent
heating and cooling simultaneousness, the
minimum value T°fminHea is always 3°C lower
than Cooling flow temperature T°fCoo.
• Min : – – c Max : – – c = Cooling flow temp. min
and max values determine the PbCoo
propor-
tional band’s range.
The controller compares desired flow temperatures for
Heating T°minHea and for Cooling T°fCoo against the
temperature measured by the discharge air detector B1and
derives the load values for Heating Qhea and for Cooling
Qcoo according to the deviations detected.
When the manipulation of air dampers
(M3.7) is foreseen the operation is
optimised
.
If under Ambient Authority
(M2.5 bis) a value other than zero
has been set, the controller re-calculates the desired minimum
heating flow temperature (T°minHea) at the moment in which
the measured room temperature is between T°minHea) at the
moment in which the measured room temperature is between
T°Hea and T°Coo
Example: values set T°minHea: 18°C, T°Hea: 20°C, T°Coo: 25°C, Am-
bient Authority: 2°C
.
Operation: for each degree of increase in room temperature between 20°C
(T°Hea) and 25°C (T°Coo), the desired value of minimum flow heating
will be decreased by 2°C (T°min Hea).
If Ambient Authority: 0°C the function is excluded
H e a t i n g F l o w
M i n : 1 8 c M a x : 5 0 c
M2.4
H e a t . T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.3
C o o l . T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.5
H e a t . T . R o o m
D e s i r . : 2 0 . 0 c ± 0 . 0
M0.3
H e a t . T . F l o w
D e s i r . : 2 0 . 0 c ± 0 . 0
C o o l . T . R o o m
D e s i r . : 2 5 . 0 c ± 0 . 0
M0.5
C o o l . T . F l o w
D e s i r . : 2 5 . 0 c ± 0 . 0
C o o l i n g F l o w
M i n : 8 c M a x : 2 5 c
M2.5
0%
100%
Q
T°Hea
PbHea
50%
–
+
t°
T°Coo
PbCoo
QHea
QCoo
A m b i e n t A u t h o r i t y
M i n F l o w H e a t : 0 . 0 c
M2.
5 bis
A m b i e n t A u t h o r i t y
M i n F l o w H e a t : 0 . 0 c
M2.5 bis
Y s - C o n t r o l :
D A M P T E M P E R A T U R E
M3.
7
To Next Page
Loading...