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  1. STA2 Fieldpiece Measuring CFM on large Trane Commercial Air Handler.

    Ok just bought the STA2 and works great on light residential to measure cfm. I tried to use it on a Trane commercial AHU /chilled water/ what method can I use to measure cfm because the STA2 goes...
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    You were 100 % correct. The old ABB worked off a...

    You were 100 % correct. The old ABB worked off a Ma pneumatic transducer signal which the PCM AO2 was set to I instead of V for the Mits. Son of a B**ch. well you learn something new every day....
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    http://hvac-talk.com/vbb/album.php?albumid=3661 ...

    http://hvac-talk.com/vbb/album.php?albumid=3661

    Tracer PCM pic attached. Still voltage when vsd wires removed at board.Ran harness from another pcm works great. Guessing board is trashed. Trane...
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    Trane PCM issues

    Ok so I just got done installing a new Mits VFD. the 0-10 vdc input from trane`s pcm reads 13 vdc.All the other AHU`s read normal output from there vsd signal. Do we have a bad PCM here? I guess my...
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    Traulsen 4dr freezer 1992 issues

    Hey guys,

    I am working on a Traulsen RLT232NUT. 404a semi.comp. Got to site and freezer was down. Turned unit off then on and system ran to -07 deg. but then never restarted until i turn the...
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    Trane VAV Board

    Just replaced same board. Trane did set it up in rover but when i looked in <edit ucm > setup they had it as Varitrane c not varitrane D 2400. Or prop. HW with thumbwheel disabled. I corrected it in...
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    only the good ones. lol did not check the date.

    only the good ones. lol did not check the date.
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    So what was the verdict? Did you replace the CPR?...

    So what was the verdict? Did you replace the CPR? I have the same problem on mine. Suction -10 head 120psi. R502 though with a semi-hemi. I cannot for the life of me get a tool that can turn that...
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    Is there a CPR tool? It`s location is real tight...

    Is there a CPR tool? It`s location is real tight to see inside?
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    what would be a good choice of refrigerant now?

    what would be a good choice of refrigerant now?
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    Traulsen Freezer

    This is for a Traulsen 2 door Commercial Kitchen Freezer. R502, Suction accum. Cap Tube with a EPR or is it a Cpr? I have not worked on alot of these. My Suction pressure well there is none goes...
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    LOVE MY SMAN3. Why couldn`t they name it SWOMEN...

    LOVE MY SMAN3. Why couldn`t they name it SWOMEN instead.LOL
    Any way been using and abusing for a month now no problems except trying to get cut in +cut out readings to stabilize quickly before...
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    ok just got the SMAN3 and guess what it works...

    ok just got the SMAN3 and guess what it works great except the piece of yellow plastic stuck between the lens and digital display. Is this something to worry about or wait another 12 weeks to get one...
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    HMMMMM no stat in coil it has a def timer. Maybe...

    HMMMMM no stat in coil it has a def timer. Maybe rip it out and put the ranco in it.
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    No doors its a reach in beverage cooler. P/C are...

    No doors its a reach in beverage cooler. P/C are 17 out 33 in. This pain in my a** cooler has been an issue for a long time. I am wondering if the air flow is a problem. What should you see as a cfm...
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    134a Super Heat Readings

    Question is 6 deg SH too low for a reach in box at the Evap. Coil seems to get iced over after a period of time. Good drainage/ box temp wont go below 40 deg.Presure controls set up correct.
    ...
  17. Thread: Superheat

    by jpnova70
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    Ahhhhhhhh. Thank you.

    Ahhhhhhhh. Thank you.
  18. Thread: Superheat

    by jpnova70
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    745

    Could you please explain the drop? SH is a easy...

    Could you please explain the drop? SH is a easy calculation now i am confused.

    Thanks,
    Jp
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    Thats exactly what it was although mine was not...

    Thats exactly what it was although mine was not exploded.

    On another subject if a reach in box`s temp cant pull under 43 deg. under no huge load what would you see or expect to read for a SH...
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    Contacts fused together. Put new d-clock in...

    Contacts fused together. Put new d-clock in upgrade from manual to digital.Now it goes in freeze mode and defrost mode . When it comes out of defrost back to freeze it trips the breaker. Hmmmm.Cant...
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    Guys, Before i go back today to diagnos the...

    Guys,

    Before i go back today to diagnos the reason why the main coil heaters are always active i noticed 2 round shaped barrels at the point where the main leads from the wiring go to coil...
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    GROOVY

    GROOVY
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    Just about to adjust TXV when i realized the...

    Just about to adjust TXV when i realized the heater was still active throwin serious btu`s in the box. H3,H4 energized in freeze mode. Here we go again.
    PS My finger found the heater!
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    ok went back to freexer today found 8 deg sh at...

    ok went back to freexer today found 8 deg sh at evap. was not sure why suction line temp was 45 deg./suction pressure 18psi. seemed high to me. Am i missing something? box temp still 10 deg. Please...
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    Walk in Freezer Subcooling Question

    I was wondering if there is a basic subcooling target as a ``rule of thumb``. I do alot of resi work not comm. Is it still 10deg? Issue i have is it wont pull past 10deg box temp. 404a runn 17psi on...
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