20
3. INSTALLER CONNECTIONS
I1
I2
I3
I4
1
2
3
1
2
3
4
1
2
1
2
I5
I6
1
2
3
4
5
6
1
2
3
4
I7
I8
I9
I10
1
2
1
2
3
1
2
3
4
5
6
1
2
3
4
5
6
7
8
PELV
Interlock
0-10V
Pump control
OpenTherm
Header
NO
DHW Tank /
Room 2
Room 1
Outside
Temp.
MFR4
S1
GND
S2
GND
S3
GND
S4
GND
OT1+ OT1- OT2+ OT2-
PWM GND 10V
10V GND
I0
I1
L
Mains Supply
230V 50Hz
Demand inputs
N
C
Interlock
NO
PE
C
230V 50Hz
Auxiliary
MFR1
MFR2
MFR3
C
L
N
PE
SL1
L
SL2
L
~
~
Mains Voltage/230V 50Hz
PELV
Volts Free Contacts
C
NO
PE
NO
*Note: The items grayed out are not standard and are connections provided by the relevant option kits.
l1
Mains Supply Connector, 230V
50Hz. Live, Neutral, PE.
l2
Demand inputs, Multifunctional,
230V 50Hz. Typical setting:
SL1, Heating Circuit 1
SL2, Heating Circuit 2/DHW
l3
Optional Interlock input, 230V
50Hz
l4
Auxiliary Mains Supply Output,
230V 50Hz. Live, Neutral.
Internal Pump Power Connection.
I5
Multifunction Volts Free Relay
Outputs, 24V DC to 230V 50Hz.
Typical setting:
MFR1 Heating Circuit 1 Pump
MFR2 DHW Circuit Pump
Internal Pump PE Connection.
I6
MFR3 Burner On Indication
MFR4 Boiler Fault Indication
PELV Only
I7
Optional Interlock input.
I8
N/A
I9
Boiler Control:
0-10V Capacity or Temperature.
OpenTherm Interface 1. Boiler, Heating Circuit 1 and/or
DHW Circuit Control.
OpenTherm Interface 2. Heating Circuit 2 Control.
I10
Optional Sensors:
Header Sensor for Cascade Control.
DHW Tank Temperature or Heating Circuit 2 Room
Temperature.
Heating Circuit 1 Room Temperature.
Outside Temperature Sensor for Heating Curve.
KEY
KEY
KEY