Coster DTU 614 C2 Eng. - Page 12

12
E 121 - DTU 614 C2 Eng. 04.07.01
We reserve the right to make changes without notice
COSTER
Pb Air damper = Pb room heating x 1.0 (= ± 2 °C)
DT recuperator = Pb room heating x 1.0 (=± 2 °C)
Pb Frostprotection = Pb room heating x 1.0 (=± 10°C)
When detectors B1 and B3 are connected, the flow temperature (B1) Integral Time parameter is
displayed on a display page to allow for changes to be made separately from the room temperature
parameter.
Pb Dampers =
Pb Hea tRoom x1 . 0
M3.16
dT Recuperator =
Pb Hea tRoom x1 . 0
Flow Temperature
Integr.Time:10m
M2.3
Pb Fros tpro t ec t =
Pb Hea t F l ow x5 . 0
M3.17
16.3 Control through room detector (B3) only or discharge air detector (B1) only
The controller compares the values: or if B3 is used
or or 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.
16.
4 Control through room detector (B3) and discharge air detector (B1)
The controller compares the values: or
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 BpHea.
proportional band’s range.
The minimum value T°fminHea helps eliminate annoying cold drafts in the room.
• Min : – – c Max : – – c = Cooling flow temp. min and max values determine the BpCoo
proportional band’s range.
The controller compares desired flow temperatures
for Heating T
°minHea and for Cooling T°fCoo and for
Cooling T
°fCoo against the temperature measured
by the discharge air detector B1 and derives the load
values for Heating Qhea and for Cooling Qcoo
according to the deviations detected.
To prevent hot air stratification during the Heating stage it is possible to prevent the heating flow
temp. T°fHea from exceeding actual room temperature by more than a certain value.
To prevent condensation in the air duct during the Cooling stage it is possible to prevent the
cooling flow temp. T°mCoo from dropping below actual room temperature by more than a certain
value.
Hea t T . Room
Des i r . :20 . 0c ±0.0
M0.5
Heat T. Flow
Des i r . :20 . 0c ±0.0
Coo l T . Room
Des i r . : 25 . 0c±0.0
M0.7
Cool T. Flow
Des i r . : 25 . 0c±0.0
Hea t ingL imi t Max
Flow–Room : 10c
M2.5
Cool ingL imi t Max
Flow–Room : 7c
M2.7
Heating Flow
Min:18c Max:50c
M2.4
Hea t T . Room
Des i r . :20 . 0c ±0.0
M0.5
Hea t T . Room
Des i r . : 25 . 0c±0.0
M0.7
Cooling Flow
Min: 8c Max:25c
M2.6
0%
100%
T° Hea
Pb Hea
50%
–
+
t°
Q
Hea
0%
100%
50%
–
+
t°
T°
Coo
Pb Coo
Q Coo
t°r
+
T°f maxHea
–
Pb Hea T°f Hea
T°f minHea
T°r Hea
T°f LimHea
t°r
+
–
Pb Coo
T°f Coo
T°r Coo
T°f minCoo
T°f maxCoo
T°f LimCoo
0%
100%
T°f Hea
Pbf Hea
50%
–
+
t°f
Q Hea
0%
100%
50%
–
+
t°f
T°f
Coo
Pbf Coo
Q Coo