Samson TROVIS 5573 - Page 158

16-76 EB 5573 EN
Appendix A (conguration instructions)
16.4.18 External demand for heat due to insufcient heat supply
Anexternalheatsourcecanbedemandedusingthe0to10Voutput.Thefunctionblockfor
arequestforexternaldemandCO1->F18-1isautomaticallyset.Thefunctionblockpa-
rameters allow the transmission range to be determined. When a system deviation in Rk1
greaterthan10°Clastslongerthan30minutes,avoltagesignalcorrespondingtotheactual
demand is issued. At the same time, the Rk1 valve is forced to close. The Rk1 valve icon
blinks to indicate that the operating situation has changed as long as the external heat
sourceisreleased.After30minutes,theexternaldemandforheatiscanceled(0Vissued)
and the control signal output in Rk1 is enabled again.
Functions Default Conguration
Externaldemandforheatduetoinsuf-
cient heat supply
0 CO1->F20-1
External demand 0
0.0°C
120.0°C
0.0°C
CO1->F18-1
Lowertransmissionrange:0.0to150.0°C
Uppertransmissionrange:0.0to150.0°C
Boost:0.0to30.0°C
AA(terminals11/12)PWM 0 CO5’->F10-0
Function:6=Externaldemand