For those Pros out there, reading a Flowrator S.H and Sub-cooling

[derbysr]

How is it when i go on S.C. i allways have problems reading S.H. and Sub-cooling with a flowrator system , and its not as accurate a TXV.
Some one give some ideas about this , and how to go about it !

[beenthere]

No idea why you have trouble.

Don't know what you mean not as accurate either.

[hvaclover]

You gottta re word that a little differently. It's not clear what you mean.

[ceg22]

a TXV - use sc to maintain a collum of liquid at valve and constant evap sh, caps and flow devices - use sh which is dependant on condenser pressure for flow, greater cond pressure greater mass flow. Question a little unclear hope this helps

[derbysr]

How is it when i go on S.C. i allways have problems reading S.H. and Sub-cooling with a flowrator system , and its not as accurate a TXV.
Some one give some ideas about this , and how to go about it !

The temputures dont seem to be steady the , sub-cooling goes up with time and i got a 10 * swing up and down on S.H . Like an example like this
54* to 44* and then up she goes and then down to the same bottom line 44* .

[hvaclover]

The temputures dont seem to be steady the , sub-cooling goes up with time and i got a 10 * swing up and down on S.H . Like an example like this
54* to 44* and then up she goes and then down to the same bottom line 44* .

Is this a fixed metering device or TXV you're refering to?

[beenthere]

A fixed metering device system will sometimes hunt when its low on charge.
It also appears to hunt sometimes after the coil has been frozen. Due to oil having been washed out of the compressor, and now moving through the evap.


Have you applied for pro membership yet.

These are question that are more technical in nature then we should be going into in the open forums..
They may close or delete it soon.

[hvaclover]

A fixed metering device system will sometimes hunt when its low on charge.
.

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[beenthere]

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And your question is???????????????????????????????????????????????? ?????????????????????????????????????????????????? ??????????



Is this a technical question for the resi area, or one that should be in the pro area.

[hvaclover]

Not so sure hunting is a word that I would use in conjunction with a fixed bore metering device.

[beenthere]

Won't say its 100% correct terminology, but close enough for me.
I failed Terminology 101.

[hvaclover]

C'mon man! How's that being fair to the OP?

[beenthere]

Because that is what very well may be happening.

And I'm not allowed to explain it much better in this forum.