Window AC & STC 1000

[Blursmotion]

I found this old but working window ac in our storage room. So I'm thinking of occupying some space in our garage and build a fermentation chamber (around 3x3meters) using this unit. Now my question is, can I put a STC-1000 temp controller on this unit? It has 2.5 horsepower though. Thanks.

 

[raouliii]

There should be a spec plate somewhere on the unit with current draw (amps) information. The STC1000 is rated at 10amps maximum.

 

[doug293cz]

A 2.5 HP motor draws about 15 - 16 amps (ref: http://www.sawmillcreek.org/showthread.php?6316-Formula-for-converting-HP-to-AMPs-or-Visa-Versa), so no, you cannot use a STC-1000 by itself. You could use the STC-1000 to switch a relay rated at 20 A, however.

Brew on

 

[Blursmotion]

A 2.5 HP motor draws about 15 - 16 amps (ref: http://www.sawmillcreek.org/showthread.php?6316-Formula-for-converting-HP-to-AMPs-or-Visa-Versa), so no, you cannot use a STC-1000 by itself. You could use the STC-1000 to switch a relay rated at 20 A, however.

Brew on

Thank you so much for the information. I will check on that.

Btw, the link says 2.5hp x 746watts / 220volts (we have 220 volts here) =8.47

 

[Reisende]

Thank you so much for the information. I will check on that.

Btw, the link says 2.5hp x 746watts / 220volts (we have 220 volts here) =8.47

It doesn't matter about the amps (ok, of course it does), but if you try and switch an inductive load like that a/c compressor with those solid state relays on the stc-1000, you'll burn them up. You really must have a relay in between.

Look at this relay, or something similar: K10P-11AT5-120

 

[doug293cz]

It doesn't matter about the amps (ok, of course it does), but if you try and switch an inductive load like that a/c compressor with those solid state relays on the stc-1000, you'll burn them up. You really must have a relay in between.

Look at this relay, or something similar: K10P-11AT5-120

Many (I won't say all since there are multiple variations) of the STC-1000's have mechanical relays. My STC-1000 clicks when switching, and SSR's don't click.

Brew on

 

[Gonefishin]

Use the nameplate rating on the unit for current draw. 746w/hp is on paper. The startup current would be what kills your undersized relay. It is a simple thing to add a relay in the mix. They are cheap and long lasting. Good luck.

 

[AnthonyUK]

You could use the STC-1000 to bypass the thermostat and it looks as though it might fit where the existing thermostat is.
The benefit of this is that you will probably be switching a relay.
I did the same with my freezer.

 

[Blursmotion]

Thank you so much guys for all the help. I guess adding a relay is the best way to go.