[RE-wrenches] SHW - parallel tanks

[Kirk Herander]

Hi,

 

Every summer I get a few calls from annoyed hot water customers who can't
stand hearing their boiler fire merely to keep the indirect tank up to
setpoint temperature, when of course the solar preheat tank is at 160
degrees or better at mid-day. So what's the best way to transfer heat, in
essence temporarily putting the tanks in parallel, from the solar tank to
indirect? I can think of a few possibilities using a circulator and
temperature controller, and a additional connection between the tanks, such
as the tank drains plumbed together as a return line, but where is the best
place to locate the circulator in a standard preheat arrangement (i.e. hot
output of solar preheat plumbed to cold input of indirect tank)?

 

Kirk Herander

VT Solar, LLC

dba Vermont Solar Engineering

NABCEPTM Certified Inaugural Certificant

NYSERDA-eligible Installer

VT RE Incentive Program Partner

802.863.1202

 

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