[RE-wrenches] External device for a Grundfos circulating pump

[drake.chamberlin at redwoodalliance.org]

I am considering using a Grundfos Alpha1 26-99F, ECM circulating pump 
for our off grid hydronic heating system. The pump is regulated by a 0 
to 10 Volt external device measuring temperature and pressure.

What specifically is that device, and where does it go in the system?

Thank you,

Drake

_Drake Chamberlin_

_Athens Electric LLC_

_Ohio Electrical Contractor's License 44810_

_NABCEP Certified PV Installation Professional_
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