Can someone review my STC-1000 Diagram Idea??

[DesignatedDrinker]

Whats up fellow brewers. Basically my plan is to kick on two 12V PC fans via outlet whenever the Compressor turns on to help circulate cold air around.



Could someone please review this and let me know if its good to go.



....Also, the built in lid light is on its own power cord that runs out the back of the lid and plugs into a splitter down in the compressor section. I would like to keep it "Hot" all the time so when I open it, it turns on, just not sure how to incorporate it? I'll be using a 16/3 cord, so ill have two 110v "Hot" lines if that helps.



Thanks!

 

[day_trippr]

Whats up fellow brewers. Basically my plan is to kick on two 12V PC fans via outlet whenever the Compressor turns on to help circulate cold air around.

Could someone please review this and let me know if its good to go.

Most definitely NOT ready for prime time!
You have your 12VDC fans connected to the 120VAC power. Bad juju.

If you were to plug a 12VDC wall wart into either of the fan outlets shown then wire the two fans to that, you'd be in good shape.

....Also, the built in lid light is on its own power cord that runs out the back of the lid and plugs into a splitter down in the compressor section. I would like to keep it "Hot" all the time so when I open it, it turns on, just not sure how to incorporate it? I'll be using a 16/3 cord, so ill have two 110v "Hot" lines if that helps.

The lid power feed is connected to the line cord before the line cord continues to the compressor and controls. If you leave the splice intact and cut the line cord closer to the compressor, you can insert your Cold relay there. The lid light will always operate when the lid opens whether the compressor is running or not...

Cheers!

 

[microbusbrewery]

+1 what day trippr said, if those really are 12vdc on 120vac, they're not going to last very long. If it were me, I'd have have the fans running all the time. It'll help keep the temps even all the time.

 

[day_trippr]

+1 what day trippr said, if those really are 12vdc on 120vac, they're not going to last very long. If it were me, I'd have have the fans running all the time. It'll help keep the temps even all the time.

And I agree with that. My keezer fans run 24/7.
But if the lad wants switched fans, he'd best add that wall wart

Cheers!

 

[Hamaki]

Now I just assumed wall warts were a foregone conclusion, but you know what happens when one assumes. My question would be how much current does the freezer draw? I believe there's a 10A limit on the STC.

 

[day_trippr]

[...] My question would be how much current does the freezer draw? I believe there's a 10A limit on the STC.

Yup, rating is 10A @120vac, and it's always a good thing to check the manufacturer plate. There are old beasts out there that may well tax the relays on that controller, but otoh/fwiw, the 13cf freezer I bought new in December is plate rated at 7.5A...

Cheers!

 

[Hamaki]

I suppose that if someone had a freezer that draws more than 10A on startup they could have a 120V outlet switched by the STC 1000, a wall wart plugged into that controlling a SSR of whatever amperage needed to switch the freezer on & off. Kinda like the setup for the fans.

 

[billybryson54]

FWIW, my Stc-1000 had two sets of receptacles. One was the Broken-jumper outlet that is controlled by the Stc itself, the other outlet is hot at all times so I can control a stir plate on one side, and a circulation fan on the other.

 

[DesignatedDrinker]

Most definitely NOT ready for prime time!
You have your 12VDC fans connected to the 120VAC power. Bad juju.

If you were to plug a 12VDC wall wart into either of the fan outlets shown then wire the two fans to that, you'd be in good shape.



The lid power feed is connected to the line cord before the line cord continues to the compressor and controls. If you leave the splice intact and cut the line cord closer to the compressor, you can insert your Cold relay there. The lid light will always operate when the lid opens whether the compressor is running or not...

Cheers!

My diagram annotates that the 12vdc fans are pluged into the 120VAC outlet. This will be done with 12vdc power supply spliced into the fans. I believe thats what you were saying, thats also what i am doing. Sorry if my diagram didnt show that properly.


As for cold relay.... If the compressor is plugged into the STC, and the lid feed is plugged into the same power feed, even with a cold relay, how is the light going to come on if the STC isnt sending power?

 

[DesignatedDrinker]

Now I just assumed wall warts were a foregone conclusion, but you know what happens when one assumes. My question would be how much current does the freezer draw? I believe there's a 10A limit on the STC.

It draws 5A, so no worries

 

[Hamaki]

My diagram annotates that the 12vdc fans are pluged into the 120VAC outlet. This will be done with 12vdc power supply spliced into the fans. I believe thats what you were saying, thats also what i am doing. Sorry if my diagram didnt show that properly.


As for cold relay.... If the compressor is plugged into the STC, and the lid feed is plugged into the same power feed, even with a cold relay, how is the light going to come on if the STC isnt sending power?

In your first post you said that the built in lid light is on its own power cord that runs out the back of the lid and plugs into a splitter down in the compressor section. Disconnect that power cord and connect it to a constant power source, one which is not controlled by the STC.

 

[DesignatedDrinker]

In your first post you said that the built in lid light is on its own power cord that runs out the back of the lid and plugs into a splitter down in the compressor section. Disconnect that power cord and connect it to a constant power source, one which is not controlled by the STC.

I would need to know the lights volt/amps no? Simply splicing it into the 120vac would be a bad idea wouldnt it. Maybe hook it up to a 12vdc wart, like the fans? Assuming the light uses 12v.

 

[Staestc]

One minor point. If you are not going to split that duplex outlet then you only need one hot line going to it to power both receptacles.
Travis

 

[Hamaki]

I would need to know the lights volt/amps no? Simply splicing it into the 120vac would be a bad idea wouldnt it. Maybe hook it up to a 12vdc wart, like the fans? Assuming the light uses 12v.

Verify the power needs of the light; I'd be surprised if it's 12V. If it is indeed 12V then use a wart. Either way I think you want it connected to constant rather than STC controlled power, right? I doubt that any light used in a unit like this draws any significant amperage but you can check that out too if you have any concern.

 

[day_trippr]

My diagram annotates that the 12vdc fans are pluged into the 120VAC outlet. This will be done with 12vdc power supply spliced into the fans. I believe thats what you were saying, thats also what i am doing. Sorry if my diagram didnt show that properly.

In fairness, it doesn't show any such thing.

As for cold relay.... If the compressor is plugged into the STC, and the lid feed is plugged into the same power feed, even with a cold relay, how is the light going to come on if the STC isnt sending power?

Because you would splice the power feed to the STC 1000 (both the power to run the unit and the input to the cold relay) beyond the point that the lid power takes off the line cord...

Cheers!

 

[DesignatedDrinker]

Verify the power needs of the light; I'd be surprised if it's 12V. If it is indeed 12V then use a wart. Either way I think you want it connected to constant rather than STC controlled power, right? I doubt that any light used in a unit like this draws any significant amperage but you can check that out too if you have any concern.

Regardless of the lights voltage i couldnt just splice it into the 120 line correct. I'll get the lights voltage, but it cant be 120 lol

 

[DesignatedDrinker]

In fairness, it doesn't show any such thing.

The green lines from fan are going to outlet box...i thought the 12vdc warts were assumed, should of drawn them.

Because you would splice the power feed to the STC 1000 (both the power to run the unit and the input to the cold relay) beyond the point that the lid power takes off the line cord...



Cheers!

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