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  1. Someone forgot to change to the correct piston...

    Someone forgot to change to the correct piston (too small) and dirty condenser?

    Also, the indoor WB and DB are the same??? Is it raining inside?
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    Formula for DeltaT?

    Is there a math formula for DeltaT taking into account humidity?
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    After checking measurements, they are CLJ24-1D...

    After checking measurements, they are CLJ24-1D units. Thank you very much!
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    The coil didnt hurt, but the 73 piston in place...

    The coil didnt hurt, but the 73 piston in place of what probably should have been a 53 didn't help.
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    Like I said, it really isn't that important.......

    Like I said, it really isn't that important.... just personal curiosity at this point.
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    588831588841

    588831588841
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    That looks very similar, but this one is a 10+.

    That looks very similar, but this one is a 10+.
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    Mine isn't quite that old.... My brother's...

    Mine isn't quite that old....

    My brother's ex-inlaw's system went out and I somehow ended up in the middle of it. They said it hadn't worked well since they had the furnace replaced a few years...
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    Old Janitrol

    I don't really need to know, it is more of a curiosity....

    Anyone have any idea of a model number of an old Janitrol condensing unit - approximately 1985 (by compressor SN). You take off of the...
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    I'm thinking they will be GSC130181 or GSC13041....

    I'm thinking they will be GSC130181 or GSC13041. I should be able to use the compressor m/n to verify size. Depending on the revision it would change the piston size slightly.

    Would anyone have a...
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    I didn't think to take any pictures... (dumb I...

    I didn't think to take any pictures... (dumb I know).

    I guess I wasn't clear either - I'm looking for a Condensing Unit. The cased coil is CAPF030B2C and CAPF025B2C. These are paired with GCS and...
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    Goodman model possibilities

    I'm looking for some model numbers for a couple of goodman units without a tag.

    They were installed with the coil and furnaces, which are tagged.

    2005 R22 Units - The coils are CAPF030B2C and...
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    I'm not an expert on this, but I would agree with...

    I'm not an expert on this, but I would agree with you... Considering air is mostly nitrogen anyways...
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    Removing air with recovery cylinder?

    Is it possible to remove non-condensables from a system with a recovery cylinder?

    Can you recover the charge into the recovery cylinder and then only liquid charge from the cylinder?

    Does the...
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    Does the indoor coil temp have an effect on the...

    Does the indoor coil temp have an effect on the number? I can see this being fairly accurate on a heat pump where you can isolate the unit and still read the pressure. With a A/C that isn't an...
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    I was thinking non-condensables. I also noticed...

    I was thinking non-condensables. I also noticed that the condenser was flooded.

    I would have to run the numbers, but the coil and condensing unit appear to match. Same brand, same age, same size....
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    LL 203.1 psi - 79.5 deg - 22.2 SC (Saturation...

    LL 203.1 psi - 79.5 deg - 22.2 SC (Saturation 102)
    SL 65.4 psi 58.5 deg - 20.1 SH (was fluctuating down to about 15) (Saturation 38.4)
    RA - 74.6db, 60.4wb, 43%rh
    SA - 56.2db, 50.9wb, 69%rh
    Amb -...
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    Unit was about 4 degrees shy of proper superheat...

    Unit was about 4 degrees shy of proper superheat by the ((3*IWB)-ODB-80)/2 formula, but fluctuating.

    A-coil is below furnace - downflow application - and is basically level (no elevation change)...
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    Hunting Piston?

    I just want to verify that I am correct on this.

    I have a newer R22 system... 13 SEER with a piston. Watching the gauges (digital) I can watch a fluctuation in the pressures and superheat. The...
  20. Day 2: Ace Tech came out with a helper. Looked at...

    Day 2: Ace Tech came out with a helper. Looked at the unit for about an hour. He informed my neighbor that he had another one identical to his unit to do and is going to take some notes so that he...
  21. I was wondering the same thing. I told my...

    I was wondering the same thing. I told my neighbor I have my doubts. He isn't terribly concerned. He said they sold him the system with a full 10 year warranty. He isn't out any money and they have...
  22. Experts that can't braze. - No pictures...

    My neighbor's system went out and had the local expert out to do the warranty. Determined that the TXV failed and caused the indoor and outdoor coils to leak...

    The tech came out today to change...
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    Thanks. I've seen those before but I could not...

    Thanks. I've seen those before but I could not find them when I searched. I couldn't remember who made them. Unless someone chimes in with a better solution, I think I'm going to order a pair of...
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    I was trying to check coil superheat on a...

    I was trying to check coil superheat on a freezer. I used the first U-bend for a saturation temperature and the vapor line leaving the evaporator box for a superheat measurement.

    I don't have much...
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    Thermocouple clamp

    I don't do much work walk-in work, but I was checking superheat on a unit the other day and I had a problem getting my thermocouples on the evaporator. My line clamp thermocouples are a Fluke 80PK-8....
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    I know I checked it with the door on as much as...

    I know I checked it with the door on as much as possible.

    I was just playing with a new photo tach. It surprised me on how little difference there was. It seemed like about 75 rpm top to bottom....
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    Probably not as much difference as you would...

    Probably not as much difference as you would think.

    I had a photo tach on a 3 speed blower a while back. If I remember right, there wasn't 75rpm difference from High to Low.
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    I called for a 24" 3 blade 18 degree condenser...

    I called for a 24" 3 blade 18 degree condenser fan blade. The guy a J-mart said they didn't have it but could order me one. I asked what he was ordering and it was a 24" 3 blade 27 degree... It was...
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    It was for a buddy of mine and I was at the house...

    It was for a buddy of mine and I was at the house before a gathering to change the stat. That's when I noticed the other issue. I had no tool bag or replacement contactor. Just a stat and a flat...
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    I did not check control voltage but I am certain...

    I did not check control voltage but I am certain there is no voltage - high or low - when it sticks.
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    I'm just speculating... I would think that if...

    I'm just speculating... I would think that if lighting was strong enough to create a magnetic field, it would have blown the defrost board or contactor. But I've never had a contactor act like that.
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    Okay... back on this unit again. I changed...

    Okay... back on this unit again.

    I changed the thermostat out and was running the unit and it did the same thing except in heat mode this time. The Condenser Fan shut off but the compressor...
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    The stat had no continuity. I cycled the ecm...

    The stat had no continuity. I cycled the ecm several times and it seems fine. Should I expect the board at this point?
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    I use a hydraulic swage. Use it to get back...

    I use a hydraulic swage. Use it to get back round. Just dont swage.
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    That got me thinking. If the board doesn't care...

    That got me thinking. If the board doesn't care if it is in a call for cooling or heating for timing the cut out of the fan, would using the 'Speed-Up' pins help determine if it is the board?
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    Yes, it is a Time/Temp board.I didn't know that...

    Yes, it is a Time/Temp board.I didn't know that the board didn't disable in Cooling Mode. I will definitely check this out.

    Thanks!
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    Defrost board issue?

    Hello!

    I had a strange problem that I could not repeat.

    Checking out a Nordyne FT4BE Heat Pump. Hooked up gauges and everything was spot on. Voltages, amp draws, temperatures, everything seemed...
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    Ballpark of 25 foot lineset. Condenser is about 4...

    Ballpark of 25 foot lineset. Condenser is about 4 or 5 feet above inside coil.
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    Oil in system

    I was on a 410a system earlier that was supposed to be just a clean and check... It was a little more than that.

    I didn't even hook the gauges up before cleaning the coil - it was at least 1/2...
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    You're right. I had 2.5 in my head from some...

    You're right. I had 2.5 in my head from some earlier readings. I didnt write it on my final work order.

    2.3 is a little lower but wouldn't scream a bad compressor to me...
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    2.5:1 compression ratio seems in line...

    2.5:1 compression ratio seems in line...
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    Aside from assuming low air flow from an...

    Aside from assuming low air flow from an excessively normal fan there may not be an issue. The evap just seems a little warm for 71 degree return air
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    Rental unit franken-system...

    I have been to a rental unit twice now... Unit was flat back in April. Leaking valve core. Supposedly wasn't working at all, so I assumed it was flat again, but it was working fine when I arrived. I...
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    If you have a broken wire a TDR meter coild tell...

    If you have a broken wire a TDR meter coild tell you where it is broke
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    If you arent rejecting heat I would expect it to...

    If you arent rejecting heat I would expect it to take longer to hit 800psi... maybe not very long... but more than 3 or 4 seconds
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    I screwed the thead title up. Yes a dehumidifier.

    I screwed the thead title up. Yes a dehumidifier.
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    Humidifer saving money on A/C?

    I had someone ask me the other day - "I'm house hunting and the house had a dehumidifier running in the house. The current owner says they run it to save money - is this true?"

    My answer was that...
  48. It's probably overkill, but I carry a Fluke 289....

    It's probably overkill, but I carry a Fluke 289. There isn't much it won't do.

    I don't know about other brands, but it is lifetime warrantied.
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    Did you hose the coil out?

    Did you hose the coil out?
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    I appreciate the information. I will identify the...

    I appreciate the information. I will identify the sweep and get new sweeps and closers installed.
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