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Type: Posts; User: rfelectron

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  1. Replies
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    Assuming R22 system 216psi head=>107F- 72F LLT=...

    Assuming R22 system 216psi head=>107F- 72F LLT= 35F subcooling. Overcharged?
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    Check subcooling. I would guess either low...

    Check subcooling. I would guess either low subcooling and the top circuit not getting a solid flow of liquid or a restriction in the top circuit.
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    Great post hvacrmedic. I always check SC along...

    Great post hvacrmedic. I always check SC along with SH and I guess I've been wasting my time all these years checking the internal LLD for a temp drop to see if it might be starting to clog up. If...
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    head 215psi=>106F LLT=80F SC=26F OAT=82F cond...

    head 215psi=>106F
    LLT=80F
    SC=26F
    OAT=82F
    cond split=24F
    I'd say overcharged a little. Probably a higher seer unit so the OD coil is big enough to hold the excess liquid without spiking the head...
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    Can you post the model number on the compressor?...

    Can you post the model number on the compressor? Many times a manufacturer will install compressor rated a few thousand BTU's less than the unit is rated for. IOW your 2T od unit might have a comp...
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    One other note: Most of the slab houses around...

    One other note: Most of the slab houses around here with great rooms and 20' ceilings also have an LP gas fireplace in the great room. Without it most folks around here would freeze in their...
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    Most of the houses around here are built on a...

    Most of the houses around here are built on a raised slab so all of the duct work goes in the attic. All the supplies are in the ceiling. The returns vary from ceiling to high wall to low wall. Many...
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    Copeland ZR34K1-PFV spec calls for 50 uf 370vac....

    Copeland ZR34K1-PFV spec calls for 50 uf 370vac. Unit had a bad 35+5 370 that looked like it had been in there a few years. Replaced with correct cap and unit is working again. Most of the caps. that...
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    Another bad run cap. today Copeland ZR34K1-PFV....

    Another bad run cap. today Copeland ZR34K1-PFV. This is an old comp. without the cap. value data on the label. I looked it up on the Copeland website and it doesn't show a run cap spec. either....
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    The current draw goes up as the run cap. value...

    The current draw goes up as the run cap. value goes down right? So you never want to undersize the run cap. What about oversizing the cap? Say the label specs a 40 mfd and all you have on the truck...
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    I been replacing quite a few bad run caps lately....

    I been replacing quite a few bad run caps lately. Instead of just putting back the same value as what was removed, I have started looking at the label on the comp. All the Copeland scrolls have the...
  12. Nitrogen is reacting with my St. Augustine grass...

    Nitrogen is reacting with my St. Augustine grass right now!
    It loves the stuff.
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    Given: 71F db and 30%RH---> dew point= 38F

    Given: 71F db and 30%RH---> dew point= 38F
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    6,698

    Stef, I didn't think you lived in a tent. I bet...

    Stef,
    I didn't think you lived in a tent. I bet if you clicked on the load calc. link at the top of this page and actually performed a load calc on your house you would see that your HP ALONE with...
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    Hi Bama, Great to see you back! Did you retire...

    Hi Bama,
    Great to see you back! Did you retire and purchase an island?

    Here's what I was thinking re: the strips:
    He's got a 14 seer HP which has a very good HSPF, much better than my 12 seer...
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    You don't need strips at all. I live in a 5500...

    You don't need strips at all. I live in a 5500 htsf all electric house in SC with 7T of 12 seer HP's. That's 785sf/T. All the strips are disconnected. My avg. KWH for Jan05 was 105 and it got down to...
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    eciguy, I have an idea for a cheap little piece...

    eciguy,
    I have an idea for a cheap little piece of diagnostic equipment that could be easily installed on every HVAC system made. Drop me an email at rfelectron@aol.com
    Thanks, Lee
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    Where's the fun in a TXV?! That's the easy way...

    Where's the fun in a TXV?! That's the easy way out. We want to experiment with a handful of pistons until we get it just right. Then do it again for the heating mode.
    How are you going to learn...
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    I say give it a try! The piston size will have...

    I say give it a try!
    The piston size will have to be reduced to match the new comp. Looking at the piston size used with that comp in the 13 SEER equipment will get you in the ball park. For example...
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    The difference between 10 and 15F SH in cooling...

    The difference between 10 and 15F SH in cooling mode is just the length of suction line containing liquid. The lower the SH the longer the liquid run out of the evap. before it picks up enough heat...
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