wiring cm927 to ecotec pro 28

[ash1212002]

Evening Guys

wireless thermostat has been fitted, when setting the temp the the wireless receiver powers on but the boiler does not fire up

RT24 - 24 V DC room thermostat link has been removed

The wiring has been fitted as follows 4 core cable

Mains connector block
x1 Live to stat live
x1 Neutral to stat neutral

Next to the connector block 230 V AC room thermostat
RT to B stat
RT to C stat

Please advise how I can rectify this, as we have no heating

 

[Steelmasons]

RTFM.

 

[ash1212002]

RTFM.

Great help you are!

 

[Steelmasons]

What are the 3 terminals on the switched live side??????

Does it not state A B C? , now what does the manual say regarding A B C?

 

[ash1212002]

There is no ABC in the manual its the new eco tec pro 28 boiler

 

[Dan Robinson]

Steel you big meany.

At least tell him to look in the thermostat manual .

 

[ash1212002]

Guys if you could simply tell me the wiring configuration that would be appreciated!

 

[Steelmasons]

Make sure you link L/L1....

JUST KIDDING....

 

[Steelmasons]

Remove core from C and move to A.

 

[ash1212002]

Remove core from C and move to A.

Done that, boiler does not fire up

 

[Dan Robinson]

Make sure you link L/L1....

JUST KIDDING....

You bastad

 

[Steelmasons]

Is this the new model vaillant with 24 volt RT linked out?

If the older model terminal 3 and 4 being RT.

If the new model vaillant then 240 volt RT would be switched live back from 927 (term B).

 

[ash1212002]

its the new model vaillant...

 

[Steelmasons]

240 volt RT is SWITCHED LIVE BACK TO BOILER.

Boiler should have perm live/neutral/earth/switched live from stat to RT 240.

 

[ash1212002]

I have perm live and neutral going from the receiver to the boiler

RT 230 V AC room thermostat has 2 wiress going into it which go into the receiver A and B