I have a Honeywell L4006H 1004 open on temp increase manual reset. Details can be viewed at http://www.pexsupply.com/product_dtl.asp?pID=1736&brand=Honeywell&cID=294. I don't know what the manual reset means. Can this simply be used as an open on temp increase aquastat or do you have to reset it every time it opens? I had it from my old steam system and would put it to use if it opens and closes without reset. Otherwise I see little use for it. Thanks.