Coster DTU 614 C2 Eng. - Heat Pump Control

16
E 121 - DTU 614 C2 Eng. 04.07.01
We reserve the right to make changes without notice
COSTER
20. FROSTPROTECTION TEMPERATURE CONTROL
The function is only enabled if detector B7 is connected .
The controller compares the set antifreeze temp. with the temp. measured
by detector B7, and calculates the Qaf load value
according to the deviation
detected and the PI parameters.
The Qaf load value acts in priority with the Qpre load or Qhea load.
If the controller has turned off the Mp pump, when the Qaf load value exceeds the 10% value the
controller turns it on again, and turns it off when it drops to 0%.
If the controller has turned on the Mv fan, when the Qaf load value reaches the 100% value the
controller turns the fan off, and cancels the Ys air damper control signal (closing) ; when it drops to
0%, the controller turns on the fan and restores the air damper control signal.
Des . Fros t p: 7 . 0c
Ac t .Fros t p: 35 . 0c
M0.14
21. HEAT PUMP CONTROL
If the Air Handling Unit is composed of a direct-exchange heat
pump, output Y can be assigned the HT.P.HEA.
winter function.
Load QH.pmp replicates load Qhea exactly, the only difference
being that when outside temp. drops below the T
°omin value, load
QH.pmp is cancelled.
Y-Win:HEATPUMP
Y - Sum: COOLI NG
M3.5
M2.17
Minim. Outside T.
Hea t . pump : ––c
De t ec t ors Layou t
––––––7–
M3.1
T° af
–+
0%
100%
50%
Q af
t° af
Pb af
0%
100%
50%
–
+
t° o
1°C
T°o min
QHea
QHea.P.Cal
50%100% 0%
Q
Hea