Johnson Controls Open on decrease vs increase questions - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Johnson Controls Open on decrease vs increase questions

Thread Tools
Old 11-13-2012, 04:06 PM   #1
Senior Member
Dec 2008
Posts: 568
Liked 45 Times on 37 Posts

My glycol chiller's Thermostat (A19ABA-4) seems to get stuck from time to time and starts to freeze my glycol bath & the beer lines along with it. When I opened it up to get the model # it says it "Opens On Decrease". The replacement unit (A19ABC-24) says it "Closes on Rise".

Is this saying the same thing?
Tapped-Out Brewing & Pub Build

Reply With Quote
Old 11-13-2012, 04:19 PM   #2
May 2011
Stow, MA
Posts: 18,914
Liked 3385 Times on 2520 Posts

I would hazard a guess that the two statements are functionally equivalent...


Reply With Quote
Old 11-14-2012, 01:14 AM   #3
Feb 2011
North Central, Ohio
Posts: 509
Liked 31 Times on 22 Posts

Yeah, I would say they are the same functionally. I've seen many mechanical controls that have a single-pole, double-throw (SPDT) switch and you can wire the contacts as needed. If yours has 3 terminals on the micro switch, then it can be wired either way. A quick check with a meter will confirm it.....

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Johnson Controls BeerGuy1000 Fermenters 7 06-07-2013 05:51 PM
johnson controls ylee21 Equipment/Sanitation 4 10-21-2012 01:35 PM
Johnson Controls rjwidman Bottling/Kegging 13 09-13-2011 07:10 AM
Johnson Controls - WTF ? Brewer3401 General Techniques 4 05-31-2011 07:12 PM

Forum Jump