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Remove the small cover.
Fit the required temperature sensors and other system
components.
Lead the cables to the regulator and connect them
according the principle diagram.
Connect the mains lead.
Fit the strain relief clips and check that all the cables are
properly clamped.
Replace the cover.
Terminals on
the regulator
Connecting system components
230 ~ Mains voltage 230 VAC / 50 Hz
Earth terminals
Pump connection (U)
1 and 2 Celcia 15 or 20 regulator
3 and 4 Boiler connection (OpenTherm)
1)
5 and 6 Boiler connection (OpenTherm)
1)
7 and 8 Boiler connection (OpenTherm)
1)
9 and 10 Boiler connection (OpenTherm)
1)
11 and 12 System flow temperature sensor (Bv)
13 and 14 Outside temperature sensor (Ba)
15 and 16 No function
17 and 18 Potential free contacts
2)
17 and 19 Potential free contacts
3)
table 01 I/O connections Celcia MC4
1)
Must be connected to the boiler's OpenTherm terminals
2)
Operation signal; contacts 17 and 18 are closed if
everything is in order (the boilers do not need to burn) and
open with a fault (internal, boiler fault, communication fault
or wiring fault)
3)
Failure signal; contacts 17 and 19 are closed if a fault
occurs (internal, boiler fault, communication fault or wiring
fault, voltage failure) and open if everything is in order.
GB
23


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