wiring cm927 to ecotec pro 28

[Steelmasons]

If you look at the two pin plug @ RT 240 on boiler you will see only one terminal is used.

RT 240 to term B of receiver.
Perm live to L of receiver.
Link L to A @ receiver.

The way it's wired at the moment you have no voltage to A due to RT 240 @ boiler being a 'dummy' terminal....In other words NO VOLTAGE.

.........I agree it can be confusing ,we've all done it.

BTW , the right hand terminal @ RT 240 is switched live from stat (B).

 

[Steelmasons]

You could always remove link from RT 24 and use these terminals to connect to receiver A B , forget RT 240.

 

[ash1212002]

Finally got there! cheers!

Removed link from RT 24 connected two wires to RT 24 and linked to receiver A B

Boiler fires up but the temp increases briefly but is not increasing? rad symbol on display is flashing

 

[Steelmasons]

Donate any fees due to your chosen charity.

 

[ash1212002]

Boiler fires up but the temp increases briefly but is not increasing? rad symbol on display is flashing