sight glass location

[cadwaladr]

with refrigerants that are blends [4 series] where in the liquid line on a average system with a pipe run of say 5 metres should you locate it because i have different opinions from my other engineer friends?

[mad fridgie]

with refrigerants that are blends [4 series] where in the liquid line on a average system with a pipe run of say 5 metres should you locate it because i have different opinions from my other engineer friends?
You should ask your self, what is the sight glass used for? moisture indicator and refrigerant flow.
As far as system charge goes it is an "aid" to charging and not a method.
What do you "not" want see in the sight glass, and why?
Answer the why, and this will give you the correct position. (and it is not where every body mounts them!!!)

[chemi-cool]

You can use a few sight glasses, after the drier will help you know when it is starting getting blocked. Just before the TXV will help you know if it fed with liquid.

On oil return line, will indicate flow of oil back to the sump.

[install monkey]

normally there by the condenser so the muppet bomb charging it can see a full sight glass. but they should be located at he tev inlet to ensure no flash gas in the liq line prior to the tev

[mad fridgie]

normally there by the condenser so the muppet bomb charging it can see a full sight glass. but they should be located at he tev inlet to ensure no flash gas in the liq line prior to the tev
And give this dog a bone! or should I say give this monkey a banana

[install monkey]

yay!-if only i could have a rep point haha

[Peter_1]

Chemi was first ;-)

[Aik]

But he wasn't say about location before solenoid or after :)

[Sandro Baptista]

But he wasn't say about location before solenoid or after :)

Considering the solenoid is just near the TEV I would put it after the solenoid (between the solenoid and the TEV), as this one also create a pressure drop 0,4...1 bar, more or less.

As mad fridgie said at the first email unfortunately many people don't apply the sight glass on this place. I try to fight that but it's not easy.

[Peter_1]

But he wasn't say about location before solenoid or after :)

Half a banana then

[Aik]

I prefer put sight glass after filter but before solenoid.


As mad fridgie said at the first email unfortunately many people don't apply the sight glass on this place.
I also don't put it at that place, only if I have problems with liquid refrigerant circulation, but it's infrequent cases.


Half a banana then
:)

[Peter_1]

Considering the solenoid is just near the TEV I would put it after the solenoid (between the solenoid and the TEV), as this one also create a pressure drop 0,4...1 bar, more or less...

I should say 0.15 bar is more commonly. If you have 1 bar, then your SV was undersized

[Aik]

I should say 0.15 bar is more commonly.
Yeah, you are right. For example danfoss (servo) solenoid needs minimum 0.05 bar to work well... 1 bar is to much

[Sandro Baptista]

I should say 0.15 bar is more commonly. If you have 1 bar, then your SV was undersized

Sorry, you are right. I meant 0,04...0,1 bar.