Super Q Time clock

monseiur

Hi all. Just looking for some advise. The mechanical time clock in my 16 year old Firebird Super Q 50/90 stopped working a few weeks ago, thought it was burned out so ordered a new one. Fitted the new one today, it was a like for like swap but unfortunately the time clock is still not working. The boiler works fine when set on ''manual'' but when time clock is set it 'ignores it' and just runs continuously as if set on 'manual'. This is the same issue I had with the original time clock which I thought was goosed, as it happens it was almost seized up but I managed to free it (after taking it out) with some silicon spray. Would the fact that it was almost seized up have caused some damage to wiring or blown a hidden fuse somewhere that is now causing the exact same issue with the new time clock ? I Checked all wiring connections etc. and all seem fine. My electrician is off to next Tuesday and tells me it will be at least 3 weeks before he'll call due to work backlog.

Any advise, observations greatly appreciated.

jimf

is the new timer holding the correct time

monseiur

Hi Jimf, thanks for replying.

It seems to be holding the correct time, but say the time clock is set for the boiler to come on at 4.00 pm for 1 hour, it will not switch off at 5.00 but will keep going as if on 'manual' - same problem as the old timer. I temporarily refitted the old timer after freeing it up, just to double check and no change. Could the old timer (that was almost seized) have damaged some wiring or relay or perhaps the new timer is also faulty ?

monseiur

Hi again, I re reading my reply it seems I did not make the problem very clear. It is not possible to set the boiler to come on say at 4.00pm as it will be on continuously anyhow whether the timer clock is set or not. Apologies for confusion.

Wearb

Depending on wiring, it could be a problematic zone valve.

monseiur

Can I ask one more question, would it be OK to leave new timer as is - manual constantly on and replace the boiler isolation switch with say an APT immersion type timer switch, it has off, on and timer. I guess one downside is that the timer would switch both boiler and circulation pump off at the same time. Is this a big no no ?

Thanks and a happy new year.

Wearb

Unless you know exactly what your current timer controlled, I wouldn't bypass it in that manner.

jimf

i wonder would it be the switch that shifts from manual to timed thats the issue

Wearb

https://www.boards.ie/discussion/comment/121555442#Comment_121555442

On both 🤔

mickdw

https://www.boards.ie/discussion/comment/121555155#Comment_121555155

We have a super q with working time clock bypassed as you describe with a climote device.

I did query at the time if killing all power to the boiler and pump via the time clock would be satisfactory but it works fine.

I don't think it's correct though.

From what you describe and as mentioned by jimf, it appears the always on / off / timer switch may not being switching between timer and always on.

jimf

https://www.boards.ie/discussion/comment/121555452#Comment_121555452

same issue with both timers would lead me to have a look elsewhere

mickdw

https://www.boards.ie/discussion/comment/121555452#Comment_121555452

On Super q, the switch is separate to the timeclock so.he wouldn't have changed that switch at all.

jimf

https://www.boards.ie/discussion/comment/121555458#Comment_121555458

would not see it as a problem unless the boiler required a pump run on

if the stat on the boiler was set too high it might cause the boiler to trip the built in high limit stat

monseiur

https://www.boards.ie/discussion/comment/121555518#Comment_121555518

Hi jimf. Thanks for your input.

It's the pump run as you describe is what I'm worried about if the power is cut to both boiler & pump at the same time. I will get electrician to check the switch that shifts from always on to time clock in case the issue is there, I must admit that it never occurred that the problem could be at that end.......every day is a school day.

jimf

im nearly sure the super q has an automatic reset for the high limit stat

once the power is back on the pump would cool the stat allowing boiler to work again as normal