Chilled water valve action

[incontrol]

Have been running across floating chilled water valves used as 2 position lately. Some say 2 positioning gets the whole coil cold and dehumidifies better, some say that's not true and uncomfortable. Why pay for a floater and not float it? Time to vote.

[cxagent]

Originally posted by incontrol
Have been running across floating chilled water valves used as 2 position lately. Some say 2 positioning gets the whole coil cold and dehumidifies better, some say that's not true and uncomfortable. Why pay for a floater and not float it? Time to vote.

Here is my vote - very, very, bad idea. By using a two position chilled water valve the system is made to function just like on - off control on DX cooling. It may do a better job of dehumidification while it is on, but when it shuts off it does NO dehumidification.

[Control Man]

Go with MODULATING VALVE

[fat eddy]

Terrible, thats why mod valves were made, now if you said you were leaving it open then reheating that is an ashrae cycle for dehum.

[floating point]

2-10 or 4-20, only use floating if you have to, and don't use on/off, IMHO

[incontrol]

Thanks guys. I agree with modulation but almost always see on/off.

[smokies]

Sound like someone had a shop full of floating valves.