DeDietrich MIT-M /E Installation, User And Service Manual page 56

7 Settings
2
3
R-Bus
BL1
1
Tab.48
Access Parameter
Air Src Heat BL function
23.5
pump > (AP001)
Parameters,
BL1 contact config.
counters, signals >
(AP098)
Adv. Parameters
Tab.49
Access Parameter
CIRCA0> OTH LogicLev
21.7
Parameters, contact (CP640)
counters, signals >
Parameters
RevContactOTH
cool (CP690)
Tab.50 Configuration A - by default
Value of the OTH Value of the BL1
LogicLev contact contact config.
(CP640) parameter (AP098) parameter
Closed (default val­ Closed (default val­
ue) ue)
Closed (default val­ Closed (default val­
ue) ue)
Tab.51 Configuration B
Value of the OTH Value of the BL1
LogicLev contact contact config.
(CP640) parameter (AP098) parameter
Closed Open
Closed Open
56 MIT-M
1. Connect the AC thermostat to the BL1 input on the EHC–05 PCB.
1 EHC–05 PCB
2 Room thermostat
22°
4 3 Output: On/Off
4 "Heating/cooling contact" output
MW-1001290-1
2. Configure the heat pump parameters
On
Description
BL input function selection
BL1 input contact configuration
Closed: function active when BL contact is closed
Open: function active when BL contact is open
Description
Opentherm Logic level contact of the zone
Closed: heating demand when contact is closed
Open: heating demand when contact is open
Reversed OpenTherm contact in cooling mode for heat
demand per zone
No: follows the heating logic
Yes: follows the reverse of the heating logic
The BL1 multifunc­
tion input is
Open
Closed
The BL1 multifunc­
tion input is
Open
Closed
Operating mode for If the OT contact is
the heat pump open
Cooling No cooling demand Cooling demand
Heating No heating demand Heating demand
Operating mode for If the OT contact is
the heat pump open
Heating No heating demand Heating demand
Cooling No cooling demand Cooling demand
Adjustment re­
quired
Heating Cooling
Closed
or
Open
Adjustment re­
quired
Closed
or
Open
Yes
or
No
If the OT contact is
closed
If the OT contact is
closed
7756241 - v02 - 19062020