Pump relay

[BaD CrC]

Can anybody give me the specs for a relay for my 220V Eheim pump to synchronise both PC and pump with the case ON button.
Thanks.

[greenman100]

12V coil

240V contacts, good for 1 amp or more.

Or, PM me. I make relay boxes, all set to go. I just made one for felinusz.

[BaD CrC]

Thanks mate.
I'm interrested, but if you're living in the US, the shipping cost to the UK will probably be more than the price of the relay itself.

[Shadowcat]

If you are living in the UK... I might be interested in one of those relay boxes :) Are they just a molex connector, pump wiring harness and kettle plug + relay all in one?

[PROkillernoodle]

http://www.killernoodle.com/waterblocks/relay.jpg

Essentially, a relay can be created for just the cost of the relay. This can be as cheap as $4-5. All you need is around a 5 amp 12v actuated relay. I use an overbuilt relay for saftey, hence 5 amps or more. You can use an old fan cable to power the relay, all you need to do is cut off the fan and the speed control sensor (yellow wire) and connect each wire to one of the COIL pins. Then, just strip a section of the pump cable and then one of the wires in the cable (not the ground, which is usually brown or green if I'm not mistaken). Then, just solder one end to the NO (normally open) and the other to the COM pin. Then you can put a project box around it or just shrink wrap the whole deal.

In your case, shipping will cost many times more than the relay. DIY is the best way to go.

[greenman100]

Originally posted by PROkillernoodle
http://www.killernoodle.com/waterblocks/relay.jpg

Essentially, a relay can be created for just the cost of the relay. This can be as cheap as $4-5. All you need is around a 5 amp 12v actuated relay. I use an overbuilt relay for saftey, hence 5 amps or more. You can use an old fan cable to power the relay, all you need to do is cut off the fan and the speed control sensor (yellow wire) and connect each wire to one of the COIL pins. Then, just strip a section of the pump cable and then one of the wires in the cable (not the ground, which is usually brown or green if I'm not mistaken). Then, just solder one end to the NO (normally open) and the other to the COM pin. Then you can put a project box around it or just shrink wrap the whole deal.

In your case, shipping will cost many times more than the relay. DIY is the best way to go.


He's right.

But what I do is a little more professional.

I take an outdoor outlet box, and install a combination outlet/switch in the box, along with the relay. I install a small bulb on the faceplate of the box to indicate that the outlet has power, and the switch can override the relay. Then two cables come out of the box, and one i connects to a wall outlet, the other to a molex.

[Bubba]

I just got all my parts to put together my relay, but would really like to incorporate an overide switch on the relay to be able to fill and bleed the system w/out having to power up the computer.Can someone please help me w/the wiring schematics to do this?Thanks for any help at all!
PS nice setup you've got there greenman!

[Bubba]

I just got all my parts to put together my relay, but would really like to incorporate an overide switch on the relay to be able to fill and bleed the system w/out having to power up the computer.Can someone please help me w/the wiring schematics to do this?Thanks for any help at all!

[ares350]

put a switch in parralel with the relay. flip the switch and its as if the relay was on. same difference.

without really thinking though, I donno if this could flow back into the PSU, I dont think it can cause the relay is open anyway. could always add in a diode for insurance though.