Wiring up my compressor. Help please...

[tomfc]

Well i just thought i would update this as everyone helped me out so much.

I wired in a 20A breaker, used a 20A switch and now it all workes as it should

 

[eil]

So capacitor was ok then?

 

[tomfc]

I ended up buying a new capacitor before i wired it all up, but i did try the original on the motor and they were both giving me the same reading on the multi meter and both started the motor, so i guess i might have got away with it, but atleast now i have a spare lol.


On a side note, i have adjusted the pressure switch to cut out at 160psi however once the pressure has dropped to about 145psi the motor kicks in. is there an adjustment somewhere so that i can adjust when the motor kicks in?

 

[eil]

That surprises me as normally when the capacitor is split or blown the top off its knackerd. If you need to adjust the kick in pressure that is done on the diff screw on the picture you posted, but don't adjust it with a too narrow differential or you will have too many stop starts

 

[tomfc]

Ah thanks, so if i adjust the screw next to the pressure cut off spring bolt thingy that will adjust when the compressor kicks in?

As i want to have it so the compressor pumps up to 160psi then when the pressure drops back down to 100psi i want the motor to start up again.

 

[eil]

It does looks like that, by turning the screw clockwise you increase the differential making the compressor stay off for longer.

 

[tomfc]

ah thanks for the information again

Ill have a play with it tomorrow and see if i can get it to do what i want lol.

 

[rtbcomp]

One thing to watch is that when you adjust the diff the cut-off pressure may change too so you'll have to adjust the other screw to bring it back down again.

 

[pedrobedro]

Does it have a valve to release the pressure in the pump cylinder when it stops filling the tank, this can make life easier for the motor so it is not starting up against the pressure already in there.

 

[mantakev]

I had problems with a 3hp motor running a v twin pump on a 200 l tank i got from a petrol station that was shutting down, the thing would trip the 20 amp at the consumer unit in the house, now i'm running a 62amp cable with the compressor hard wired onto a 32 amp trip, no prob now, even when the migs being used
Oh yea, soft start valve must be fitted
Regards
Kev