Tandem compressor control box.

[brightspark]

what size cable supply to your garage and length from house

 

[Agroshield]

Fired up one pump lovely I flicked it off after 30 secs as I was worried about the noise but then thought stuff it so tried again and it popped the fuse in the plug

If you are just testing the motors, leave the tank drain valve open so it is not building pressure as that will reduce current draw a little. Also, if the motor is belted to the compressor, slip off the belt(s) as that will also reduce current draw.

 

[Domeo_jones]

what size cable supply to your garage and length from house

I honestly don't know bright spark, iv just moved in, all I can see is it's coming on a pipe from the back bedroom... at 3 metres maximum.
I'm debating atm getting the sparks in to run a decent supply to the garage as I'm grinding the missus down into knocking it down and moving it to the back of the garden... and possibly making it a little bigger(,much) .
I'll keep you posted. Cheers again fella

 

[Domeo_jones]

If you are just testing the motors, leave the tank drain valve open so it is not building pressure as that will reduce current draw a little. Also, if the motor is belted to the compressor, slip off the belt(s) as that will also reduce current draw.

I did think that so undone the big bolt in the end of the tank. Although slipping the belt is a blinder... I'll crack on that tommorow. Cheers.

 

[Domeo_jones]

Okay fellas... all my house jobs done, plus the old first cut ready for the bbq tommorow..
My feed in looks like 2.5mm and I have whipped the cover off the consumer unit in the garage...
I'm feeling hopefull.
Any thoughts ?

 

[brightspark]

you can up the breaker in the house to a 25 amp on a 2.5mm cable that feeds garage and max breaker in garage the same if needed

 

[Domeo_jones]

That's a result. Still a C curve for both?
I'm guessing I'm pushing my luck attempting to run both motors??
Happy days...

 

[Domeo_jones]

you can up the breaker in the house to a 25 amp on a 2.5mm cable that feeds garage and max breaker in garage the same if needed

• #27

That's a result. Still a C curve for both?
I'm guessing I'm pushing my luck attempting to run both motors??
Happy days...

 

[brightspark]

• #27

That's a result. Still a C curve for both?
I'm guessing I'm pushing my luck attempting to run both motors??
Happy days...

yes c type. 3hp motors run at about 12 amps full load current so you may get away with it

 

[Domeo_jones]

Haha... well

yes c type. 3hp motors run at about 12 amps full load current so you may get away with it.

Well my screwfix order has arrived just in time for the long weekend... unfortunately my capacitor hasn't turnt up yet so it's only one motor at a time. But happy days.
I will post a few pics if the progress.
Thanks.

 

[Domeo_jones]

So excellent news... both motors/ pumps work independently, I am still waiting on my 30uf capacitor to attempt running both with my contacts and timer...
Next question is I am bosching through 13amp fuses so can I install a 16amp plug and a dedicated switch/socket off my 20 amp breaker?
Many thanks. Hope you are all enjoying Easter.

 

[brightspark]

So excellent news... both motors/ pumps work independently, I am still waiting on my 30uf capacitor to attempt running both with my contacts and timer...
Next question is I am bosching through 13amp fuses so can I install a 16amp plug and a dedicated switch/socket off my 20 amp breaker?
Many thanks. Hope you are all enjoying Easter.

yes it will blow 13 amp fuses on start up . fit the blue 16 amp socket and use the 20 amp breaker the socket can handle the load no probs

 

[Domeo_jones]

yes it will blow 13 amp fuses on start up . fit the blue 16 amp socket and use the 20 amp breaker the socket can handle the load no probs

Cheers bright spark thank you.

 

[Domeo_jones]

So, garage all painted cleared out loads of crap,
16amp switched socket installed.
So now onto this control box set up and then possibly get both these pumps running.
On to this start up box.
Looks a bit daunting... blooming connections every Where... I'm drawing up a nice colour diagram to double check with you more electrical people...

 

[Domeo_jones]

What a complete plum.... uploaded the wrong picture..
So finally got the 30uf capacitor And about to wire it all up, just got to double check with you more electrical people im doing it right...
I'm just a bit stumped with the pressure switch issue, am connecting it straight to the mains feed as per a single set up or using it as a switch for the contacter?? Or does it not matter..
I know after that the timer links to the second contactor and then pump obvs...
Just wondering/over thinking it probably.
Cheers...

 

[brightspark]

the pressure switch just operates the 2 contactor coils . the second contactor coil is wired through the timer so it brings the second motor in a few seconds after the 1st