STC1000 220 volt

[bramptonbrewer]

I recently purchased an STC1000 online and when it arrived I realized it was a 220 volt and not 110. Is there any chance i can still use this for my fermentation chamber?

 

[alphaomega]

Yes. Easiest is to desolder the transformer and bridge its connections. That makes is a 12V unit instead. Power it with a 12V wall wart (an AC or DC one, or the polarity of a DC one, won't matter as the STC has a rectifier bridge after the transformer).
https://github.com/matsstaff/stc1000p/wiki/1.5.1-12-volt-power

OR

If you still want to feed it directly from mains, you can replace the relays with 5V equivalents. That would make it work.
http://www.ebay.com/itm/5pcs-HONGFA-Power-relay-SPDT-10A-277VAC-load-5VDC-coil-JQC-3FF-005-1ZS-/390585800182


Just FYI... I have around 100 transformers that are 110 volt for the STC, due to a wrong shipment... (that is, I have changed transformers in 100 units to 220v....) I'd gladly send you a few, but the shipment from sweden alone would probably make it cheaper for you to just buy another STC.

 

[bramptonbrewer]

Thanks for the help, but i guess we will just call this a lesson learned. I will just have to wait a little longer for my fermentation chamber.

 

[Grreg2]

I may have the same problem. The diagram shows to connect to a 110VAC power supply, but then it shows 10A/220VAC at the heating and cooling power connection. See picture. The sticker on the front of the box says 110V. View attachment ImageUploadedByHome Brew1432234723.550212.jpg
Can I use this on a chest freezer with a regular 110V plug?

 

[pointcity-homebrew]

Yes, that is just the rating of the relay. the 110VAC input will supply 110VAC through the relays.