X12 connector
Description
SO+/SO- input
Connection of an electrical energy meter
Condensation ter
minals
Connection of a condensation sensor for under
floor cooling
6.8.1
Connecting an on/off or modulating thermostat
The on/off or modulating thermostat is connected to the R-Bus terminals
on the EHC–05 PCB or the optional SCB-10 PCB.
The PCBs are delivered with a bridge on the R-Bus terminals.
The R-Bus input can be configured to add the flexibility of using several
types of on/off or R-Bus thermostat.
Tab.30 Control parameter for the R-Bus input on the R-Bus terminals of the EHC–05 PCB
Parameter
Description
CP640: CIRCA0
Configuration of the contact direction of the R-Bus input for heating mode
CP690: CIRCA0
Reversal of the direction of the logic in cooling mode compared to heating mode
Tab.31 Control parameter for the R-Bus input on the R-Bus terminals of the SCB-10 PCB
Parameter
Description
CP640: CIRCA1
CP641 : CIRCB1
CP642: not used
CP643: CIRCC1
CP644: not used
Configuration of the contact direction of the R-Bus input for heating mode
CP690: CIRCA1
CP691: CIRCB1
CP692: not used
CP693: CIRCC1
CP694: not used
Reversal of the direction of the logic in cooling mode compared to heating mode
Tab.32 Default settings for the CP640 and CP690 parameters
Value of the parameter
CP640
CP641
CP642
CP643
CP644
Value of the parameter
CP690
CP691
CP692
CP693
CP694
Heating if the R-Bus contact is Cooling if the R-Bus contact is
1 (Default value)
0 (Default value)
closed
closed
0
0
open
open
1
1
closed
open
0
1
open
closed
6.8.2
Connecting a thermostat with heating/cooling contact
The AC thermostat is only connected to the R-Bus and BL1 terminals of
the EHC–05 PCB, with a single heating circuit.
The PCBs are delivered with a bridge on the R-Bus input.
6 Installation
44
iHPI
7701563 - v02 - 22052018