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Type: Posts; User: JKerch

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  1. Replies
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    I have a question for Jim. I just got my wireless...

    I have a question for Jim. I just got my wireless probes (low & high) and tried to zero but my high pressure reads -4.2 # @ atmosphere is there another adjustment?
  2. So, question, am I to assume stay brite is best...

    So, question, am I to assume stay brite is best in refrigeration processes w 404a and r22 but not in liquid line side of 410a. I personally have never used it but am open to suggestions.
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    Yes to negative pressure if building is tight,...

    Yes to negative pressure if building is tight, (most pole barns aren't). To remove humidity more is required than a fan.
  4. This gets into DIY, and clearly outside of an...

    This gets into DIY, and clearly outside of an issue we can address on this forum.
  5. Not a variable but definitely speed adjustable as...

    Not a variable but definitely speed adjustable as is PSC 3speed motor.
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    The truth is there is such a product but as...

    The truth is there is such a product but as indicated the direct method is much faster using larger vacuum rated hoses and vcrts. The Imanifold uses diaphragm valves and is a 4 valve unit but you are...
  7. Sounds like a good assumption, but don't you...

    Sounds like a good assumption, but don't you think the "HVAC guy" should make that adjustment? Most furnaces on the market can get an exact match for the component in question some 20 yrs old. So did...
  8. Thread: 300 ton chiller

    by JKerch
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    Do you just keep it filled w ice and let it drain...

    Do you just keep it filled w ice and let it drain naturally?
  9. Replies
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    So with a LiPoly pack we can possibly get a...

    So with a LiPoly pack we can possibly get a longer duration? Can you show proper configuration? Can the probes also receive battery upgrades?
  10. Is your first picture your new stat?

    Is your first picture your new stat?
  11. Thread: HVAC apps?

    by JKerch
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    Get an Imanifold and send yourself reports, hehe....

    Get an Imanifold and send yourself reports, hehe. Works like a charm
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    So why did they put the condenser coil right next...

    So why did they put the condenser coil right next to the house, seems to me that the whole unit needs turned 90 degrees from the house.
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    I do this on almost everything except mc coil....

    I do this on almost everything except mc coil. Never had an issue. My boss told me to stop doing it once, then our senior tech changed his mind. It is so fast. Just move guickly and you will see it...
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    Follow my instructions, do not burn off when unit...

    Follow my instructions, do not burn off when unit is off.
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    No, I'm not kidding, go to the tread "cotton wood...

    No, I'm not kidding, go to the tread "cotton wood is just like flying cotton". I do it all the time.
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    In both of the instances where I found no...

    In both of the instances where I found no orifice, my head pressure would fluctuate and my sc was low, sh low and fluctuating. Customer was complaining of unit never really keeping up but seemed to...
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    Sounds to me like missing or improperly installed...

    Sounds to me like missing or improperly installed orifice. I've had that happen twice to me. Have you checked orifice?
  18. Replies
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    X2. If twin pumps check amp draw on each pump....

    X2. If twin pumps check amp draw on each pump. Should be the same. Temp drop should be 8 - 12 normally.
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    Burning off a trane unit is "normal". Just make...

    Burning off a trane unit is "normal". Just make sure the charge is relatively good them leave the unit running during the burn off, then rinse. This IS tranes recommended procedure.
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    As I understand this, all three phases carry...

    As I understand this, all three phases carry voltage at double line volts but b leg is corner grounded at the transformer. All three legs in the box have 240v to the shell, but this is delta not y...
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    I was scrathing my head on this one!

    Went to an old building downtown and replaced an a-coil, had pumped the system down prior to installing and after I was done I started to pull a vacuum. No service disconnect as condenser was sitting...
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    Sounds like a very poor loop design. Here we...

    Sounds like a very poor loop design. Here we drill 1 200' hole per ton
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    Check for properly installed orifice.

    Check for properly installed orifice.
  24. Replies
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    After all that I found this app called "stay...

    After all that I found this app called "stay alive" on the App Store that works great for keeping the apps open and running.
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    What is a good app for keeping the android phone...

    What is a good app for keeping the android phone from sleeping when imanifold is operating?
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    Send me info using my email in my profile

    Send me info using my email in my profile
  27. Replies
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    I would be. I live in independence.

    I would be. I live in independence.
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    I like my note 3, never an issue.

    I like my note 3, never an issue.
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    What brand of equipment?

    What brand of equipment?
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    And check for restriction at filter drier

    And check for restriction at filter drier
  31. Replies
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    And belts are new.

    And belts are new.
  32. Replies
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    On dual furnaces belt driven make sure pulley...

    On dual furnaces belt driven make sure pulley sizes are adjusted to give 1 amp less than rated motor amp draws and that motors are matching and freewheeling to give proper air flow
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    IMO, spend a little more and get a YJ 1/2" tree,...

    IMO, spend a little more and get a YJ 1/2" tree, two 3/8" to 1/4" vacuum hoses and two appion core tools. I installed six new units and pumped them all down to 80 micron in six to seven hours...
  34. And since it is a heat pump, do they want to pay...

    And since it is a heat pump, do they want to pay the difference on you heat bill? It should have been weighed in at time of service.
  35. All outdoor units come w a pre-weighed amount of...

    All outdoor units come w a pre-weighed amount of refrigerant in them. When they had to remove the charge to install the compressor they recovered refrigerant from your unit. They also took your...
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    Nitrogen and Argon have two different properties...

    Nitrogen and Argon have two different properties in relation to hot metal and the puddle produced. Ask your wire provider for the circumstance. Mig wire can be ran as a spray arc at high speeds and...
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    Aluminum coils are fine, you personally need to...

    Aluminum coils are fine, you personally need to register your products, make SURE it gets done, call manufacturers to verify, most installing companies do not or can not do that for you. Also make...
  38. I just work on them, but to get ahri match on...

    I just work on them, but to get ahri match on that 14seer unit it should have a txv on it. But all c33 coils come w/o it. CX34's are built in txv's.
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    Sounds to me like txv, and high head is forcing...

    Sounds to me like txv, and high head is forcing it to open to adequate sh.
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    I do know of its use in geothermal but not sure...

    I do know of its use in geothermal but not sure how it affects sub cooling. Just curious.
  41. Replies
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    Not familiar w hru's. Do they affect sub cooling...

    Not familiar w hru's. Do they affect sub cooling much?
  42. Replies
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    Any tech worth his salt will know how to get that...

    Any tech worth his salt will know how to get that system balanced w/o removing and starting again. I would ask the op did his tech friend take temperatures while using his gauges or was he just going...
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    Whenever you disconnect from the previous unit...

    Whenever you disconnect from the previous unit you were working on, disconnect your high side first, open both valves to let liquid go back to low side, then disconnect low side. Same when charging,...
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    Personally, I would have installed a txv on a...

    Personally, I would have installed a txv on a mismatched unit just to let it take the work out of guessing.
  45. How can the HVAC guy check it w/o going inside?...

    How can the HVAC guy check it w/o going inside? The unit is most likely a fixed orifice system so to say it is fully functional he must go inside to get wet bulb readings. I'd bet money on low...
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    What was the superheat, always give both when...

    What was the superheat, always give both when needing a diagnoses. 150 sounds high for suction for 77 outside temp
  47. Replies
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    :beat: They wanted the rain to keep it washed...

    :beat: They wanted the rain to keep it washed out. Looks like a Goodman. Another Hackman project done in Hackville City USA ::DD:
  48. Replies
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    With this in mind a complete recapture should not...

    With this in mind a complete recapture should not be necessary, isolate the heat pump and run the fan, true suction should still match pt chart.
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    TY, good idea, personally don't remember if it is...

    TY, good idea, personally don't remember if it is a heat pump but that would sure get it to ambient quick and the blend, if there, would definitely get it to show up. Thanks
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    I really did do this once early on but caught it...

    I really did do this once early on but caught it that very day. We all have made blunders. If I remember right, I caught it by not being able to achieve sub cool measurement but too much water under...
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