modern low temp electric defrost

[stanbyyourword]

hi Im wondering how you guys working on supermarkets terminate your electric defrost on the open cases with electric defrost and hot gas also , (though Im certain thats still done on pipe temperature), first off the case I looked at last week was a bit different it was standard open type coffin on bottom but top of case were low profile glass door case low temp both sides First off it was a setup i hadnt looked at before in the top case the evap was at top standard airflow pattern return air at bottom front , and on bottom below(of same case) in air stream was the the electric defrost element , ive never seen or heard of such a setup til now, have any of you? and if so given that most systems now have electronic sensor for air on and air off and box temp for monitoring purposes, do any of you have electronic sensors to terminate defrosts? and if so with this setup on air temp? or do you still have mechanical tstats to terminate defrost combined with cpc danfoss sensors etc and in both cases "where" in the air stream is it positioned and what temps, and in cases w electric defrost are the heaters in or below coil as i know them to be or set away in air stream like the top of this case in your normal coffins? and in hotgas/coolgas how are you terminating and with electronic or mechanical tstats? hope this brings some interest and good discussion regards stan

[stanbyyourword]

http://www.georgebarker.co.uk/dettaglioProdotti.pag?rootID=232&prodID=335 here is the case

its a bit obscure manuf in uk, no tech doc on site , perhaps I`ll call them , looking forward to input! regards stan

[stanbyyourword]

anyone?

[DDDpope]

I am so confused. Must need more info, there must be a question in there somewhere. Sorry

[stanbyyourword]

hah i guess many are , I got in touch with case manuf and basically this electric defrost element (big single element with spiky fins) is in the bottom airflow stream ie return air up thru back wall through fans across coil and back to case,and terminates on a sensor located on this back wall (air flow stream off of heater)what I have found talking to manuf is that someone had crossed the defrost termination sensor with the air on sensor in keeping air on sensor on back wall and termination in center of case in front center r/a at glass doors, and the recomended cutout temp is aprox 42f max time 40 min. I brought this here to see if any have seen this set-up , I certainly have not or even heard of such a thing. perhaps I should have titled thread "odd" rather than "modern" stan

[stanbyyourword]

hah i guess many are , I got in touch with case manuf and basically this electric defrost element (big single element with spiky fins) is in the bottom airflow stream ie return air up thru back wall through fans across coil and back to case,and terminates on a sensor located on this back wall (air flow stream off of heater)what I have found talking to manuf is that someone someone had crossed the defrost termination sensor with the air on sensor in keeping air on sensor on back wall and termination in center of case in front center r/a at glass doors, and the recomended cutout temp is aprox 42f max time 40 min. I brought this here to see if any have seen this set-up , I certainly have not or even heard of such a thing. perhaps I should have titled thread "odd" rather than "modern" stan