DHW temperature limits

[DestroyerOfAll]

hello all....i have a tankless coil in a weil/mclein boiler........there was an electric hot water heaqter in line but bypassed. i replaced it with a 50 gal bradford / white electric. what would be general high and low limits and differential be on my aquastat(tankless coil)....and the settings are set to "hot" on the water heater. right now the aquastat is 200/180 and 25 diff. also, mixing valve has just been changed. water is very hot....i probably shoud turn something down, just don't know where to lower...i'm thinking at the aquastat because it's just supplying the wh now.
thanks

 

[johnjh2o]

Without a call for heat the boiler should run a lower temperature. A tank-less coil is one of the most expensive was to make DHW. Think about changing to a indirect water heater.
http://www.amtrol.com/boilermate.html

John

 

[DestroyerOfAll]

john,
thanks for the reply.........i went with the 50 gal electric because the plumbing was there and i didn't have to call anyone to do the work........
are my temp. settings too high? and what would be typical settings for the high, low, and diff?