Hi cgiles75,
Hi
So you're going to try and find a relay for this then ... ?
yeah, i wanna get right on with it.
You will need two relays, you realise that don't you ?
Yes, of course !
You said 'a relay' so i wondered if you knew you need two ...
I meant a suitable TYPE of relay, i know i will need two of them
Ok, so long as you know.
Have you considered that it might be possible with just the float switches ?
What do you mean?
I mean with no relays, just the float switches and the solenoids.
No, i had not considered that.
Well it would depend on the type of float switches.
How can a float switch decide whether or not to engage an extra solenoid ?
Quite.
Surely it must have a relay, for the third solenoid ?
Well not necessarily ...
And whats it got to do with the type of float switches, they just
float up and operate, ... right ?
Yes, but some include an extra contact which isn't used much, one
that opens when the switch operates.
Whatever for? surely you only need one that makes contact? ...
Depends. You might want a pump to stop when something is full, that sort of thing.
You might need a "make" when its up to level, or you
might need a "break" when its up to level. Depends what you're doing.
Some float switches allow for both choices. Its not unusal at all.
I see, so my float switches could have an extra contact ... ?
They could have, yes.
If they have contacts like that, they're called change-over cantacts.
C/O for short.
So how would that help anyway?
If they were c/o type they be arranged to operate the third solenoid
without any relays involved.
Could they ?
yes.
So how can i tell if my float switches are this type or not ?
You would have to have a close look at them, right where the wires
join on to contacts themselves, and see if there are three points for
connections, but only two being used with wires on them.
And if there is?
If there is then they are probably c/o type.
And if there isn't?
Then you will have to use two relays to do the switching.
Two?
yes two
I know, I know, just kidding
will it mean getting my hands dirty ... ?
It might, are they that clean now ?
Oh all right, i'll check it out
Okay, let us know then ...
John