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Posted by Rich on December 09, 2009 at 22:32:42:
In Reply to: Re: Indirect water heater problem. posted by HeatPro on December 08, 2009 at 10:41:29:
The aquastat actually has a lock on the adjustment wheel that prevents it from going over 150, its actually riveted in, and i would have to drill it out to go higher.
That said, does this have any bearing on why my water tank isnt kicking on when it should be? I dont really follow the stratifying remark.
: I'll agree that the tank is probably stratifying due to the low setting of 125F.
: Legionella is killed at temperatures above 155F, so I'd move the setting up there. Otherwise, Legionella grows in water at the lower part of the tank below 112F to make respiratory problems in a shower. Running the water that is cold out of the tank to start it up is a bit late.
: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VSD-4KR88SD-5&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1127416846&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a8abb73b674c2b2b88969d9da34a814f
: Although many would like to be 'green' and save money, there is no savings in the hospital. A tempering valve after the tank to mix hot with cold fresh water to a desired temperature is safer.