Page 5of 16 APHITEMPCON001-11-04
Heat / Cool Changeover ofOutput1
Output1 is suitable forHeat/Cool changeover (manually) control in2pipeAHU, Zoning control or
HydronicHeatingapplication.Wiring connection is shown in fig.
With coolingor heating selected, theuser set point (SP)will bepositionedat themiddleof
proportional band. Theoutput percentage isproportional to the temperaturemeasuredand
decidedbyproportional band. Theproportional band canbe set from2.0°C to19.0°C. The
control logic is seen inDiagram1.
Diagram1:
Proportional band
Cooling
Heating
50%
Valve Open
100%
Temperature Increase
Valve Close
0%
sp
