Configuring A Room Thermostat; Configuring An On/Off Or Modulating Thermostat; Configuring A Thermostat With A Heating/Cooling Control Contact - Baxi MK SYSTEM Installation, User And Service Manual

Signals/Counters
Screed end time
ZM020
Screed dry remaining
ZC000
8.10

Configuring a room thermostat

8.10.1

Configuring an on/off or modulating thermostat

Access path Parameters
CIRCA > OTH LogicLev
24.5
Parameters, contact
counters, CP640
signals >
RevContactOTH cool
Settings
CP690
Tab.13 Setting the OTH LogicLev contact CP640 and RevContactOTH cool CP690 parameters
Value of the parameter
OTH LogicLev contact
CP640
Closed (default value)
Open
Closed
Open
8.10.2

Configuring a thermostat with a heating/cooling control contact

Fig.45
2
3
R-Bus
BL1
1
7856310 - v02 - 21122023
Description
The projected end date and time of the screed drying procedure
The remaining duration of screed drying in days
The on/off or modulating thermostat is connected to the R-Bus terminals
on the EHC-14 PCB or the optional SCB-17-B 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 thermostat or OpenTherm (OT).
1. Configuration of the R-Bus input for using an on/off thermostat (dry
contact) for CIRCA.
On
Description of the parameters
Configuration of the on/off input contact direction for heating mode.
Closed (default value): heating demand when contact is closed
Open: heating demand when contact is open
Reversal of the direction of the logic in cooling mode compared to heating mode.
No (default value): cooling demand uses the same logic as the heating demand
Yes: cooling demand uses the reverse logic to the heating demand
Value of the parameter
RevContactOTH cool
CP690
No (default value)
No
Yes
Yes
The AC thermostat (air conditioning) is always connected to the R-Bus
and BL1 terminals on the EHC-14 PCB.
The AC thermostat is not compatible with the SCB-17-B PCB, which is
used to control a second heating circuit.
Priority will be given to the AC thermostat input over the other Summer/
Winter modes (Auto/Manual).
The PCBs are delivered with a bridge on the R-BUS terminals.
1. Connect the AC thermostat to the EHC-14 PCB.
1 EHC-14 PCB
2 Room unit
3 ON/OFF output
22°
4 4 "Heating/cooling contact" output
MW-1001290-1
Position of the on/off contact
for heating
Closed
Open
Closed
Open
8 Settings
Position of the on/off contact
for cooling
Closed
Open
Open
Closed
33