Best way to pipe 2 Hydronic coils same zone

Ray B.

Looking for best way to pipe in 2 hydro coils in existing duct work, same hydronic zone as not to overfeed 1 coil & vs other. Was thinking just putting in full port ball valves on return of each coil for balancing? 1 coil is 10x10 & other is 22x12. Thanks for the help!

hot_rod

A dedicated circulator for the two? Do you know the required flow rate?

This is a user friendly "setter" it allows you to set, confirm, and check flow rate.


https://www.caleffi.com/sites/default/files/file/01149_20_na.pdf

Solid_Fuel_Man

Reverse return.

Keith M

If the coils are the same with same pressure drop, Solid Fuel Man is correct...use reverse return.

Ray B.

Hot Rod Yes dedicated circulator for the 2 coils. 1 coil is 2.5 & other coil is 5 GPM (just coil) . approx 25-30' of piping (1 way). Total Btus approx 95,000 (1 coil is 24.7 k Btu & other is 70k)
1" pipe I'M assuming? Thanks in advance

EBEBRATT-Ed

Reverse return is the best way but with two different size coils you still need to put balancing valves on each coil. Ball valves are not good to balance with. 1" is ok for the mains 7 gpm for the mains. 3/4" for the coils.

hot_rod

A wide array of balance valves available, depending on the accuracy you want and the $$ you want to spend.

Ball style like the B&G Circuit Setter or Caleffi 132 quicksetter are perhaps the most common.

Or a fixed orifice type, variable orifice style, PIB pressure indépendant.

The Quicksetter may be the only style with the gpm readout built in. Most others would require a ∆P gauge connected to the test ports to dial in and exact flow rate.