BO AND AO

[flange]

i am not allowed to answer, i have been scolded once today.....but turn me on for a defined period of time and maybe i will, especially if you do so with intrinsically isolated relays.

[alcomech]

Which is better location of a three way valve at a coil, supply or return piping? why?

Does using manufactures guidelines qualify as an answer?

[alcomech]

i am not allowed to answer, i have been scolded once today.....but turn me on for a defined period of time and maybe i will, especially if you do so with intrinsically isolated relays.

Subliminal, but I get it.

[MatrixTransform]

Now this I would love to see the answers from the guys here, I've heard both ways with backing arguements for each.

For hot water...
1- lower pressure of the coil after a control valve may cause conditions where fluid quality to goes down. ie vapour may form in the coil (noise, cavitation, oxygen)
2- the valve and actuator of a valve in the supply line will be much hotter than the return line (hot actuator = bad)
3- supply line means more chance of destructive cavitation at higher vapour pressures.

For cold water...
1- the supply line may well be below the local dew-point which would mean the valve and actuator may form condensate (water in actuator's moving parts = bad)
dew point of 22°C @ 50% is 11°C (return may be like 12 °C, and flow may be like 7°C)

...bunch of good reasons there

[MatrixTransform]

What is the difference between binary outputs and analog outputs?

...spelt differently

[alcomech]

...spelt differently

What do you mean? Are you saying they are the same? I am just asking to clarify.

[milkyway]

Flange!!!!

I wanted him to answer so he could learn something ya dolt!

Haha , I skipped his answer lol , but good job flange!!
I will read urs after I respond, so here it goes!
Been reading the CNT-SVP1C-EN so I think I'm getting it
Pretty much explains it all
Analog outputs=set points
Binary outs. =start stop/ chiller/ tower/
Binary in. = flow switch /diff switches
Binary variables/= not really sure/ = adjustable ________
Analog variables=NRS/= adjustable_________
I know the 580/581= has up to 30 Binary in
And a variable up to 120 i think .,
What I really need is the software so I can have hands on ,
Now to reads flange's

[milkyway]

Flange!!!!

I wanted him to answer so he could learn something ya dolt!

Which is better location of a three way valve at a coil, supply or return piping? why?

I put mine on the return

[MatrixTransform]

What do you mean? Are you saying they are the same? I am just asking to clarify.

...it was sarcasm.
...do some reading mate ... honestly, you have the wealth of the Internet at yr finger-tips.

...actually, now I can't tell if I was being sarcastic or facetious.

[milkyway]

Ok , this sounds a lil (temporarily ) funny. How does that exactly work., or did I ask for an uh o

[milkyway]

ok, well he still needs to learn some things. how do you deal with having a 2-10 volt sensor, but need a 4-20ma input??

Ok , this sounds a lil (temporarily ) funny. How does that exactly work., or did I ask for an uh o

[viceman]

Which is better location of a three way valve at a coil, supply or return piping? why?

diverting or mixing

[TheBladeJN]

I work for a mechanical engineering company as we always place valve on the return side, but I have never asked why...

I will ask some of the mechanical engineers why this is the case, and get back with you.

Thanks