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pressure in closed loop heating system

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Steve_51
Steve_51 Member Posts: 7
in THE MAIN WALL
WHAT I WANT TO KNOW IS, IN A CLOSED LOOP RADIANT FLOOR HEATING SYSTEM, WILL THE PRESSURE RISE WHEN MORE PUMPS ARE ADDED TO THE SYSTEM? IF SO, PLEASE EXPLAIN WHY AND WHAT CHANGES CAN BE MADE TO KEEP THE PRESSURE DOWN?

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  • Earthfire
    Earthfire Member Posts: 543
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    pressure

    Circulators circulate they are not pressure boosters. They work by creating a pressure differential between the inlet and outlet thereby forcing the fluid to move through the pipe circuit. System pressure is set by the initial cold fill pressure and the expansion of the fluid due to heating . If your auto fill is not connected at the point of no pressure change the circulator may cause it to sense an incorrect presure and over feed thereby causing overfill and pressure relief valve leakage. Checkout Dan's Book PUMPING AWAY, has all the answers you will need.
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