gauges

[kc8939]

hi, my high side gauge started too flutter so bad that i can not read it. cansomeone tell me what this might be? thanks ken

[icemeister]

If you're reading compressor discharge pressure right at the compressor and the gauge flutters it's the pulsations from the compressor that's causing it. If you have a backseating discharge valve, just crank it back out slowly to dampen the pulsation and the flutter is minimal.

If that still doesn't work buy a better set of gauges or a liquid filled gauge.

[NedFlanders]

I usually open the high side knob/handle(red one) to the yellow. Meaning the high side pressure is now in the yellow charging hose.That seems to mellow it out a bit.
It usually works for me ( usually)

[kc8939]

hi, yes i'am reading at the comp discharge side and these gauges never did this before, they were left on for a couple of days, would this affect them? these gauges cost
me 150.00 and I don't think that this is a cheap set. maybe I am wrong the low sode is ok could I have blowen the high side gauge? thanks ken

[prestiege]

ihave never seen this happen on a residential AC unit thus far, what are u using them on that this is happening

[madarius]

Originally posted by kc8939
hi, yes i'am reading at the comp discharge side and these gauges never did this before, they were left on for a couple of days, would this affect them? these gauges cost
me 150.00 and I don't think that this is a cheap set. maybe I am wrong the low sode is ok could I have blowen the high side gauge? thanks ken

If you blew your high side gage, then it wouldn't fluctuate. #2 having your gages on over night does not affect the pressure mechanism inside of your gages, unless the head is over 350lbs.

[zerman]

hmmm, might be some non-condensables in the system.saw this hapen but cant remember what the low side guage was doing. let us know what you find

[Reeferman]

kc8939 there is a good chance that there is a piece of crap inside the gauge. Remove gauge from manifold and you might be able to knock it out. If not then replace gauge.
I have found this to be more of a problem with all the blends now. Yellow Jacket has a mesh screen in all the newer manifolds now.

[smilies]

Originally posted by madarius
having your gages on over night does not affect the pressure mechanism inside of your gages, unless the head is over 350lbs.

Why is 350# the magic number?


And kc8939, it's just the pulses from the discharge piston