7.5.8 Heating/Cooling mode output
The purpose of this output is to communicate signals to an external controller so that the operation mode is
displayed in the controller and that the 3way valve can be controlled using the controller.
When space heating is provided through the floor H fan coil units and Cooling is provided with the fan coil
units only; during Cooling mode, the floor heating loop should be closed via the 3way valve so that cold water does
not run into the floor heating loop. This output allows control of the 3way valve.
PCB(Terminal)
43
44
Heating
Cooling
mode
output
Heating/Cooling is
Contact OPEN = Not active
Contact CLOSE = Active
230V 50Hz
Parameters
Level
Parameter
Function description
Display & Input value
Remarks
Group Code
Default
min.
Max.
Unit
I
51
43
T erminal 43-44 : Heating/Cooling mode output
0=disable
1=Indication of Cooling mode (CLOSE=Cooling)
2=indication of Heating mode (CLOSE=Heating)
0
0
2
-
84
7. Unit Management
Summary of Contents for AEYC-0639U-CH
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