SMC Discussion Areas

Trouble-Shooting => Refrigeration => Topic started by: WDG on September 10, 2016, 10:48:33 am



Title: dead band
Post by: WDG on September 10, 2016, 10:48:33 am
I don't have a new tstat to compare with the old ones I have so I'm wondering what the general population here think the proper dead band for a tstat should be? I have ordered a new tstat but I don't know if you can adjust the dead band or not.  My Beverage Air seems to be running from 20 degrees to 35 degrees but then I just have it hanging for the time being.  It might be more accurate once I reassemble the top.


Title: Re: dead band
Post by: johnieG on September 10, 2016, 02:49:52 pm
Its easier to think of the " dead band" as the offset/ differental point between the cut-in temperature of the   thermostat control and the cut-out point.  It varies depending on the thermostat you are using, (say air-sensing vs evap' /contact temperature types)

For the layman the " dead-band "  is the temperature range in which the compressor isnt running in this instance.

That's one take on it anyway

Some ' stats have a fixed differential, while others are adjustable, google your units part number & pull up the specifications.

Also not to be confused with " deadpool"


Title: Re: dead band
Post by: WDG on September 12, 2016, 06:43:50 pm
I picked up the term "dead band"  when I got into Instrumentation maintenance at a petro chem plant.  I have also used the term off set so I agree with everything you said.  I have a new stat coming so I'm going to see what it will do.  The beverage air that I post some pics of seems to be swing a good 10 degrees but I've never paid attention to any other machines so I don't know if that's good or bad.  I would have thought 5 degrees would be good.  My house stat is set at 3 degrees but it's easily changed by going into the setup mode and works differently than a stat for refrigeration unit.