Refrigerators and air-conditioners contain heat exchangers which draw the heat away from the room or compartment to keep it cool. Heat exchangers are most commonly found in boilers. They allow your boiler to heat the water that is then pumped through your radiators to warm your home.
Boiler Heating Primary Loop / Boiler Secondary Loops
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Modern HydronicSystem Designs for Condensing Boilers
Jun 23, 2014 · The secondary circulators use the common piping between the primary and secondary circuits as their "compression tank." Always pipe your secondary circulators so they pump away from the primary loop and toward the radiation. On most jobs, you'll connect your secondary circuits in a manifold off the two primary-to-secondary tees.
(boiler) and secondary (system) loops –Closely spaced tees or a mixing manifold • Prevents flow in one circuit from interfering with another –Example: As zone valves open, close, or modulate, and as system pumps vary speed, the boiler loop is not impacted. Monday, December 01, 2014 Modern Hydronic Designs For Condensing Boilers 7
Boiler Heating Primary Loop / Boiler Secondary Loops Primary Loop Piping is commonly used in boiler heating systems that run needing multiple temperatures or contstant temperature at the hydronic boiler is required.
A parallelprimary/secondary piping configuration provides the same water temperature to each secondary circuit: This benefit is achieved at the expense of more complicated and costly piping. In addition, both seriesand parallelprimary/secondary systems require a primary circulator.
Beyond Primary / Secondary Piping - Caleffi