
Tab.37 Control parameter for the OT input on the R-Bus terminals
Parameter
Description
CP640
Configuration of the contact direction of the OT input for heating mode.
CP690
Reversal of the direction of the logic in cooling mode compared to heating mode
Tab.38 Default settings for the CP640 and CP690 parameters
Value of the CP640 parame
ter
Value of the CP690 parame
ter
Heating if the OT contact is
Cooling if the OT 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–04 PCB, with a single heating circuit.
The PCBs are delivered with a bridge on the R-Bus input.
Tab.39
Value of
the param
eter
CP640
Value of
the param
eter
AP098
Blocking input
status
BL1
Operating mode
for the heat
pump
If R-Bus contact open
If R-Bus contact closed
1
(default
value)
1
(default
value)
Open
Cooling
No cooling demand
Cooling demand
1
(default
value)
1
(default
value)
Closed
Heating
No heating demand
Heating demand
1
0
Open
Heating
No heating demand
Heating demand
1
0
Closed
Cooling
No cooling demand
Cooling demand
0
1
Open
Cooling
Cooling demand
No cooling demand
0
1
Closed
Heating
Heating demand
No heating demand
0
0
Open
Heating
Heating demand
No heating demand
0
0
Closed
Cooling
Cooling demand
No cooling demand
1. Connect the "heating/cooling" thermostat contact to the BL1 input on
the EHC–04 PCB for the heat pump.
2. Connect the "On/Off" thermostat contact to the R-Bus input on the
EHC–04 PCB for the heat pump.
3. In the Installer/EHC–04 menu, configure the BL1 input to "Heating/
Cooling", by setting the AP001 parameter to 11.
4. In the Installer/EHC–04 menu, set the contact direction of the BL1
input with the AP098 parameter.
5. In the Installer/CIRCA0 menu, set the contact direction of the R-Bus
input with the CP640 parameter.
6.9
Filling the installation
6.9.1
Filling the heating circuit
Before filling the heating system, flush it thoroughly.
6 Installation
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AWHP-2 PBS-i
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