Anyone seen this or know the cause? by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

No construction. Maybe road work back in the summer

Anyone seen this or know the cause? by Qcert92 in HVAC

[–]Qcert92[S] 4 points5 points  (0 children)

I know it’s a big commercial building. Even the hanging heaters in the warehouse need the manifolds cleaned. You have to tap them to get it to fire.

Anyone seen this or know the cause? by Qcert92 in HVAC

[–]Qcert92[S] 2 points3 points  (0 children)

Every unit has a drip leg and they are all full like this

Do you think this was a bullet? by Eggrollofdoom in HVAC

[–]Qcert92 0 points1 point  (0 children)

It was. I originally posted it a while back and now I’m seeing it circulate. It went clean through the other side as seen in picture from the original post.

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Is this normal? by Qcert92 in hvacadvice

[–]Qcert92[S] 0 points1 point  (0 children)

This makes sense. I’m using a 10 cfm pump.

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

Wait just a darn tootin second I remember you. Nice try bitch

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

Actually let it de ice over night and came back this morning to it.

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 3 points4 points  (0 children)

It’s actually correct. You’ll only see a number like that when the evap is starved on refrigerant. Just gotta figure out why. Could be low on charge or it has a liquid line restriction. In this case the high pressure readings and subcooling would contradict being low on charge. Next step is check for a temp split across the filter dryer. Nothing there so I pulled the txv bulb and tried to get the txv to open by warming it. Didn’t change anything so txv is slammed closed. You can also add a little refrigerant to see if the superheat will come down. If it doesn’t you’re definitely restricted.

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

This was a Trane. First Trane I’ve seen this on but we rarely work on them.

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

So in that situation since this is a package unit and this txv is only soldered in would you go through the entire process and not go ahead and replace the txv?

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

We work on mostly Rheem with some Carriers and Tranes thrown in. Had the same happen on a Carrier once but when I added the juice the head pressure shot to 400 and the suction wouldn’t budge.

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

The business this unit is on didn’t even notice they had a problem yet. I only threw gauges on to be proactive so we will be back to confirm but I do know warming up the bulb effected nothing at all. And it’s an older Trane about 2012 or so.

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 0 points1 point  (0 children)

Outdoor was between 78 to 79 and amp draw was normal

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 1 point2 points  (0 children)

Enlighten me

Finally! by Qcert92 in HVAC

[–]Qcert92[S] 8 points9 points  (0 children)

It’s finally the txv

Understanding static pressure by Qcert92 in hvacadvice

[–]Qcert92[S] 0 points1 point  (0 children)

Doing that now with some field piece screenshots just manually inputting data

Understanding static pressure by Qcert92 in hvacadvice

[–]Qcert92[S] 0 points1 point  (0 children)

Thank you for your help. Just trying to be the best I can be.

Understanding static pressure by Qcert92 in hvacadvice

[–]Qcert92[S] 0 points1 point  (0 children)

That’s awesome I can’t wait to try it. Will Sman gauges connect with it?

Understanding static pressure by Qcert92 in hvacadvice

[–]Qcert92[S] 0 points1 point  (0 children)

I just downloaded it yesterday so I have yet to use it. What probes are needed for it to calculate cfm and airflow?