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Thread: What do YOU do?
07-11-2009, 02:41 AM #14
There has to be oil sightglass somewhere. What's happening in there when the comp runs ?
calm 3/4 full ok
foaming top level visible double check
full sightglass is not good either
a few more answers will help too
Freezer suction lines only have to be at 25* F and they'll make ice easily with no liquid.
less humidity would lower the frost too
make sure U stick to your guns when U make a call
07-11-2009, 06:36 AM #15
07-11-2009, 07:51 AM #16
07-11-2009, 09:03 AM #17Regular Guest
- Join Date
- May 2009
he mentioned that the racks he works on are commonly 507
would that make a difference?
07-11-2009, 09:33 AM #18
I "dabble" in both supermarkets and hvac. Not real good at either.
Your buds are correct when they say they're NOT the same trade. However, your T/P Chart does not lie.
You're running 404 LT at 20 psi. That's not out of line for market racks. Some might even call it slightly warm.
Surely there is some humidity in the ambient air...
Humidity is.... what? Water vapor, no?
Water freezes at +32f, so some frost is to be expected.
Go run through your checks, you'll see, bud.The views and opinions posted here are my own. They do not reflect the corporate policies of my employer and will most likely get me fired at some point.
07-11-2009, 10:21 AM #19
I inform the customer of the situation and that was that. I did not bill them that day and have never been called back to that unit. So they did get billed after some time went by.
So to make a long story short, in our field of light commercial refrigeration, this method seems to work out."It's not that I'm so smart, I just spend more time with problems." Albert Einstein
07-11-2009, 10:32 AM #20
Please do not take my commets as negative or cynical......I just deal with this nonsense alot too and it gets old ."It's not that I'm so smart, I just spend more time with problems." Albert Einstein
07-11-2009, 12:15 PM #21
Saturation temperature - The boiling point of a liquid
SUPERHEAT - Heat added to a substance above it's saturation temperature.
SUPERHEATED GAS - A gas temperature higher than the evaporation temperature at the exiting pressure.
SUPERHEATED VAPOR- Refrigerant vapor heated beyond its saturation point.
So if a vapor is superheated above its saturation temperature, then there can be no liquid remaining.
1) you have supermarket rack experience I have supermarket rack experience.
2) should I be worried about frost on suction lines? I worry more if there is no frost on low temp suction lines.
3) and what should I tell a customer who has been informed that if he see's frost on his lines it will damage his compressor? That he was misinformed by an idiot.
07-11-2009, 01:26 PM #22
hussmann remote headers. What a friggen POS those are."The only real security that a man can have in this world is a reserve of knowledge, experience and ability." Henry Ford
07-11-2009, 02:04 PM #23Regular Guest
- Join Date
- May 2009
thanks for pics stonewall, they may come in handy if the issue comes up again.
07-11-2009, 02:37 PM #24
Attached is a little ditty I put together a while back for posting in the local supply house....just to see what kind of response it would get. As expected, most guys immediately say it's flooding back.
(The picture....along with the operating conditions...was posted on HVAC-Talk last year by Smilies)
07-11-2009, 06:33 PM #25
07-11-2009, 06:34 PM #26