Baxi boiler pump overrun using true off delay timer

[Joel Allen]

Wired as you suggested, permanent live to L on delay timer 1 - ch pump 2 - signal. Pump now continuously runs?

 

[Joel Allen]

I think its going to work fine just need to wire L 1 2 correctly and it should do the job, no instructions with switch at all!

 

[stem]

The diagram is printed on the side. If N & L are the Supply and 1 & 2 the switch then.

The timer should be mounted in a suitable enclosure and the cables secured so that the wires in the terminals aren't the only thing holding them in place.

Of course if the hot water is running then that would keep the pump going even if the heating switches off.

 

[Joel Allen]

The diagram is printed on the side. If N & L are the Supply and 1 & 2 the switch then.

View attachment 179279

The timer should be mounted in a suitable enclosure and the cables secured so that the wires in the terminals aren't the only thing holding them in place.

Of course if the hot water is running then that would keep the pump going even if the heating switches off.

 

[Joel Allen]

Just tried that way around and now I'm stumped! no power to pump when like that, love the diagram

 

[Simon35]

The diagram is printed on the side. If N & L are the Supply and 1 & 2 the switch then.

View attachment 179279

The timer should be mounted in a suitable enclosure and the cables secured so that the wires in the terminals aren't the only thing holding them in place.

Of course if the hot water is running then that would keep the pump going even if the heating switches off.

Don't think your sketch is quite correct, L on relay should be connected to permanent live, original live to pump to 2, new off delayed live to pump to 1.

 

[stem]

Just tried that way around and now I'm stumped! no power to pump when like that, love the diagram

I made a mistake when I first did it, revised it quickly. and hoped no one had noticed. Are you looking at the revised drawing?

 

[Joel Allen]

I made a mistake when I first did it, revised it quickly. and hoped no one had noticed. Are you looking at the revised drawing?

View attachment 179281

 

[Joel Allen]

Drawing looks exactly the same as the previous drawing

 

[Simon35]

I made a mistake when I first did it, revised it quickly. and hoped no one had noticed. Are you looking at the revised drawing?

View attachment 179281

Both drawings are the same?

 

[Joel Allen]

Don't think your sketch is quite correct, L on relay should be connected to permanent live, original live to pump to 2, new off delayed live to pump to 1.

 

[Joel Allen]

Tried also as you suggested Perm live - L 1
1 - old live feed to pump
2 - new feed to pump

Pump works but is constant, I can hear the switch clicking every 30s which it is set at?
Might have to get a pro in I'm losing patients with it now!

 

[oldbutnotdead]

I don't think you've got what you think you've got there (in terms of a true off delay relay). It appears (can't get any definitive info on it anywhere, BG's site is bare) to be designed for use with momentary switches- push switch, relay engages and latches for the indicated time then disengages.

I can't read the diagram on the side of the thing- if as someone else has suggested there is L and N and 1 and 2 then the following MAY work;

N goes to N
L goes to the output from the microswitches
1 goes to a permament live from somewhere (on the heating circuit- ideal is the supply line to the timeclock)
2 goes to the pump (NOT the boiler)

Best verify the functions of the terminals with a multimeter before you try it for real

Also the relay may not last very long- it won't be designed for the coil to be energised for long periods of time so may fail prematurely.

EDIT Just looked at other posts and Stem has suggested the same setup. Given the intended purpose of the relay it wouldn't be a surprise if it doesn't engage until the L has been connected and then disconnected- which would explain why it didn't work. Wrong device for the job- this might do better https://www.automation24.co.uk/anal...Gvl-a8sMx3YnOgR7TcToFs-LvzpEUvgAaAt5IEALw_wcB or something similar- critically it has changeover contacts

 

[Joel Allen]

I don't think you've got what you think you've got there (in terms of a true off delay relay). It appears (can't get any definitive info on it anywhere, BG's site is bare) to be designed for use with momentary switches- push switch, relay engages and latches for the indicated time then disengages.

I can't read the diagram on the side of the thing- if as someone else has suggested there is L and N and 1 and 2 then the following MAY work;

N goes to N
L goes to the output from the microswitches
1 goes to a permament live from somewhere (on the heating circuit- ideal is the supply line to the timeclock)
2 goes to the pump (NOT the boiler)

Best verify the functions of the terminals with a multimeter before you try it for real

Also the relay may not last very long- it won't be designed for the coil to be energised for long periods of time so may fail prematurely.

EDIT Just looked at other posts and Stem has suggested the same setup. Given the intended purpose of the relay it wouldn't be a surprise if it doesn't engage until the L has been connected and then disconnected- which would explain why it didn't work. Wrong device for the job- this might do better https://www.automation24.co.uk/anal...Gvl-a8sMx3YnOgR7TcToFs-LvzpEUvgAaAt5IEALw_wcB or something similar- critically it has changeover contacts

 

[Joel Allen]

Just my luck! I could try take it back and buy the one you suggest, the only reason I bought that one was because someone said they had used for the same job and worked fine. Like you say, not a lot of info on switch and no instructions. Anyway thanks very much for your advice.