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 0-10VPump control OpenTherm Header
NO
DHW Tank /
Room 2 Room 1
Outside
Temp.
MFR4
S1 GND S2 GND S3 GND S4 GNDOT1+ OT1- OT2+ OT2-PWM GND 10V 10V GNDI0 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
CNO 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.
I5 Multifunction Volts Free Relay
Outputs, 24V DC to 230V
50Hz. Typical setting:
MFR1 Heating Circuit 1 Pump
MFR2 DHW Circuit Pump
I6 MFR3 Burner On Indication
MFR4 Boiler Fault Indication
PELV Only
I7 Optional Interlock input.
I8 Optional Pump Modulation Control, 0-10V.
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
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