We moved into a house that has got an Ideal Icos HE24 condensing boiler.
We noticed that sometimes when the CH clicks off, there is a bang in the pipes.
I assume that this is happening because residual heat in the heat exchanger is "boiling" the water in the boiler when the pump stops running.
The CH system is wired up with the pump coming on at the same time as the call for heat from the boiler, so there isn't a "pump overrun" wired up at the moment on our system.
I was wondering if this boiler has got a terminal on it that is for a pump overrun, but the manual for the boiler is pretty sparse when it comes to details on how to wire it up.
The manual say there is live L1, L2, L3.
L3 is permanent Live.
It says L1 and L2 should be joined if there is no room stat
On the wiring diagram one option says that if a stat is used, then the stat gets wired to L1, and L2 gets wired to "system controls"
Another option has "system controls wired into L2 (with the room stat being part of "system controls") and in this diagram L1 is left disconnected.
At the moment my "system controls" are wired into L2 with L1 left disconnected.
So my question is if anyone knows what L1 and L2 are supposed to be?
(Is one call for heat, and the other a pump-overrun)
Any help gratefully received.
We noticed that sometimes when the CH clicks off, there is a bang in the pipes.
I assume that this is happening because residual heat in the heat exchanger is "boiling" the water in the boiler when the pump stops running.
The CH system is wired up with the pump coming on at the same time as the call for heat from the boiler, so there isn't a "pump overrun" wired up at the moment on our system.
I was wondering if this boiler has got a terminal on it that is for a pump overrun, but the manual for the boiler is pretty sparse when it comes to details on how to wire it up.
The manual say there is live L1, L2, L3.
L3 is permanent Live.
It says L1 and L2 should be joined if there is no room stat
On the wiring diagram one option says that if a stat is used, then the stat gets wired to L1, and L2 gets wired to "system controls"
Another option has "system controls wired into L2 (with the room stat being part of "system controls") and in this diagram L1 is left disconnected.
At the moment my "system controls" are wired into L2 with L1 left disconnected.
So my question is if anyone knows what L1 and L2 are supposed to be?
(Is one call for heat, and the other a pump-overrun)
Any help gratefully received.