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Type: Posts; User: Tom R

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  1. Replies
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    Snap on use to sale those TIFF units off of their...

    Snap on use to sale those TIFF units off of their tool trucks, they were painted red but were made by TIFF.

    Don't know if the Snap on man could help you out or not.
  2. There is a hierarchy in the HVACR trade, Just to...

    There is a hierarchy in the HVACR trade, Just to name a few rungs on the ladder consider the following.

    Delivery driver, permanent helper, salesman (if you can’t fix it sell a new unit), Parts...
  3. Replies
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    1,941

    I have a bunch of these 10 turn current...

    I have a bunch of these 10 turn current transformers with a variety of connectors on the end, they are made up by winding exactly 10 turns of wire around a PVC pipe form (I usually use the cheap type...
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    1,400

    How could anyone analyze this problem without...

    How could anyone analyze this problem without more facts?
    What kind of Hat?
    Which one of you wears the Hat?
    Will the monkey be taught Manual J?
  5. Replies
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    3,823

    Well that is true to some extent, I guess it is a...

    Well that is true to some extent, I guess it is a matter of semantics but a true counter voltage is induced back into the windings of the field that created it.

    In the case of the run winding the...
  6. Replies
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    3,823

    There are 2 CEMF’s involved in the PSC motor, the...

    There are 2 CEMF’s involved in the PSC motor, the CEMF of the run windings and the CEMF of the start windings. In normal operation the current in the run windings will increase as the rotor speed...
  7. Replies
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    3,823

    Well I had given up trying to talk about the part...

    Well I had given up trying to talk about the part that the turn’s ratio of the motor windings plays in the increased voltage across the capacitor; but I guess this is a good time to try it...
  8. Thread: R410-A flaring

    by Tom R
    Replies
    17
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    5,272

    Hydraulic fittings are 37° if you try to flare...

    Hydraulic fittings are 37° if you try to flare steel tubing to 45° most of the time it would split on you, hence the shallower flare angle.
  9. Replies
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    5,361

    Ok there are hacks and crooks out there but 100%...

    Ok there are hacks and crooks out there but 100% 6 out of 6.

    I cannot believe you could pick up the yellow pages and randomly pick 6 companies and get this result.

    Where did they get these...
  10. Replies
    39
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    3,799

    First of all you need to give us some more...

    First of all you need to give us some more numbers to work with.

    It appears your condenser is not getting alot of heat to reject, your TD is only about 9.9°F (What is the seer rating onthe...
  11. Replies
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    3,764

    240 volt PSC fan motor with a single pole...

    240 volt PSC fan motor with a single pole contactor?


    Motor windings probably are grounded somewhere in the internal windings.
  12. Replies
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    2,258

    We have all grown up using the credit and banking...

    We have all grown up using the credit and banking system and don’t realize what it must have been like before the idea men begin to take the real wealth away from the hunters and use it to control...
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    3,400

    A few years ago we were passing through...

    A few years ago we were passing through Bellingham, Wa.. since we had a day to kill before we were due in eastern Wa., we decided to take the whale watch one day cruise to Victoria BC.

    What an...
  14. Replies
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    2,345

    You can get Acetone in the paint department of...

    You can get Acetone in the paint department of any of the big box stores (at least we can around here).

    50% Acetone + 50% ATF (Automotive Transmission Fluid) penetrates rust better than most of...
  15. Replies
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    1,702

    Well once again my assuming it was a 240/120 volt...

    Well once again my assuming it was a 240/120 volt single phase supply turned out to be wrong.

    Yes it does sound like you must have a 3 phase supply with a wild leg and someone used a wild as one...
  16. Thread: 608 - 609 ???

    by Tom R
    Replies
    10
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    1,015

    Way back when I got my 608 Universal from ESCO...

    Way back when I got my 608 Universal from ESCO Institute, took the proctored tests at a supply house.

    Got the 609 from ESCO online , it was so easy that it was really kind of a joke.

    Google...
  17. Replies
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    1,702

    There is no such thing as a wild leg on 240/120...

    There is no such thing as a wild leg on 240/120 volt single phase supply (if that is what you have), and it can’t be a unbalanced supply voltage because 118 +205 does not add up to the 238 volt...
  18. Replies
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    3,126

    Things vary from locality to locality but a lot...

    Things vary from locality to locality but a lot of questions need to be asked and answered here.

    Is he classifying you as sub-labor or sub-contractor? Will his liability insurance cover your...
  19. Thread: Testo 435

    by Tom R
    Replies
    8
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    918

    First of all, assuming that your new Instrument...

    First of all, assuming that your new Instrument is accurate, when your airside parameters tells you that your evaporator is underperforming. What is causing the poor performance?

    You need to do...
  20. Replies
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    2,397

    If you are a HVACR student or a rookie, you have...

    If you are a HVACR student or a rookie, you have arrived at the point where you need to research COP (Coefficient of Performance) and EER (Energy Efficiency Ratio).

    PS: Get your pro status and ask...
  21. Replies
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    4,123

    Are you with a licensed company that has the...

    Are you with a licensed company that has the license or permit numbers painted on the truck?

    Were you on a call outside of your permitted area?

    I see guys around here use an unmarked vehicle in...
  22. Replies
    19
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    2,673

    Yep could be, depending on which side of the...

    Yep could be, depending on which side of the panel your breakers are connected to.:whistle:

    If you take a 250watt lamp rated at 120volts it will pull 2.08333 amps (I=P/E) 250/120.

    Which would...
  23. Replies
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    2,673

    The 5th circuit is only getting 120 volts across...

    The 5th circuit is only getting 120 volts across it: but if I understand what you are saying is that you have created is a 3 wire 240v circuit so the neutral will carry only the unbalance between the...
  24. Replies
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    2,673

    Do the elements feed from multiple breakers.? ...

    Do the elements feed from multiple breakers.?

    Is the last element you turned on by chance fed from another breaker that is on the other side of the 240 so that the potential difference between the...
  25. Replies
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    9,588

    The obvious fact is that you do not respect your...

    The obvious fact is that you do not respect your boss and it is affecting your attitude.

    The old saying is that there is your story, his story, and the truth.:grin2:

    I don’t know maybe you work...
  26. Thread: ELI the ICE Man!

    by Tom R
    Replies
    7
    Views
    2,024

    ELI where E= Voltage I=Current L= inductance ...

    ELI where E= Voltage I=Current L= inductance so voltage leads the current in an inductor or coil.

    ICE Where E= Voltage I=Current C = Capacitance so current leads the Voltage in a...
  27. Replies
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    3,084

    I think you have to compare what you are making...

    I think you have to compare what you are making against a similar position in your area, one that you have the skills to perform. It seem useless to compare your wages to a Doctor or a burger...
  28. This is my first (and probably last) post to ARP....

    This is my first (and probably last) post to ARP. I seldom ever even read this section and when I do I usually hum the old Johnny Cash song “the one on the right was on the left”.

    Having said that...
  29. Thread: Subcooling

    by Tom R
    Replies
    26
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    2,586

    Check your instrumentation! The LLT cannot be...

    Check your instrumentation!

    The LLT cannot be less than ambient temperature unless a restriction is present, a below ambient line temperature is proof that “ flashing” is occurring.
  30. Replies
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    Welcome Nebraska students. MCC? Get your post...

    Welcome Nebraska students. MCC?

    Get your post counts up and apply for Pro. Lots of good information on the Pro forums.
  31. Replies
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    1,334

    Every way I tried to cut and Paste the tables got...

    Every way I tried to cut and Paste the tables got all mixed up.

    The only way I can see to do it is to attach a pdf file copied from one page of my notes on Air Conditioners/

    I hope it helps.
  32. Replies
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    1,334

    Kevin is correct I cut and pasted a chart from a...

    Kevin is correct I cut and pasted a chart from a word document and something happened to the dT portion of the chart.

    dT … delta temperature (the change in temperature of the air stream caused by...
  33. Replies
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    1,334

    Chart that I Use. SEER ...

    Chart that I Use.


    SEER
    TD Range
    8
    30 35
    10
    25 30
    12
  34. Replies
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    916

    Something’s to keep in mind when tracing...

    Something’s to keep in mind when tracing circuits.

    • Every complete circuit must have a source and a load.
    1. The source provides the power and usually comes from a contactor or
    breaker.
    2....
  35. Replies
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    4,714

    Not exactly slang but here are some old...

    Not exactly slang but here are some old expression used where I use to work before I retired. I didn’t use the ones that would get me banned.:whistle:

    “Work you like a borrowed Mule.”
    “Nervous as...
  36. Thread: Indoor workshop

    by Tom R
    Replies
    24
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    1,329

    An old hollow core door makes a cheap light...

    An old hollow core door makes a cheap light weight work bench top, make the legs from
    2 x4’s or sit it on two base cabinets or two filing cabinets or whatever you can find surplus or at the salvage...
  37. Replies
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    2,866

    I use a little hand pump that was made for the...

    I use a little hand pump that was made for the automotive tech trade (Mitevac) it will either pump a positive pressure or a vacuum. I have used this for the last 40 years along with a manometer to...
  38. I have been coming here since 2001, in the early...

    I have been coming here since 2001, in the early days (if my memory is correct) the forum was open and all replies could be read by anyone. The restricted access pro sections came later: but i can’t...
  39. Thread: tempture rise

    by Tom R
    Replies
    24
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    1,447

    I will not post formulas or technical details in...

    I will not post formulas or technical details in an open area of the forum but: let me pose this question.

    If you adjust the blower speed to operate at the top end of the heat rise rating when the...
  40. Replies
    181
    Views
    6,019

    How much mechanical ventilation was included in...

    How much mechanical ventilation was included in the HVAC-CAL heat loss figures, and how much of that ventilation was actually running during your test runs?
  41. Do a net search on degree days for your area, and...

    Do a net search on degree days for your area, and compare the perivous years cooling days to this years cooling days for the same period of time.

    That should tell you if the new unit has had to...
  42. Replies
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    2,207

    I have several pin vices that I use, one is hex...

    I have several pin vices that I use, one is hex shaped and stores the orifice drill bits in the handle the other is round and knurled. Either one can be turned by hand or chucked up in my cordless...
  43. I select the printable display, then I hold down...

    I select the printable display, then I hold down on the left mouse button and mark all the text I want to save, then I do a copy (control C) I then paste (control V) the contents into Word.

    I...
  44. Replies
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    3,173

    Well I am no physicist or chemist; but I used dry...

    Well I am no physicist or chemist; but I used dry nitrogen for years because of the belief that it worked. When I was introduced to the practice I was told the nitrogen reduced the surface tension...
  45. Thread: Twilli

    by Tom R
    Replies
    25
    Views
    990

    Did Twilli invent birthdays? Happy birthday...

    Did Twilli invent birthdays?

    Happy birthday Twilli.
  46. Replies
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    926

    That would depend on the transformer and the type...

    That would depend on the transformer and the type of winding and core. We use to use the rule of thumb that an unloaded 3 phase transformer over 100KVA would be about 4%-5% of rated load, under...
  47. Replies
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    472

    It sounds like you have a PSC motor with a...

    It sounds like you have a PSC motor with a boosted start circuit.

    Those have a capacitor in parallel with an autotransformer; the motor is an odd duck in that it has a normally open and a normally...
  48. Replies
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    631

    Is it a 9 lead wye, dual voltage motor connected...

    Is it a 9 lead wye, dual voltage motor connected for the High voltage?

    If it is the inner 3 coils in the center of the Yare connected internally That would be T10, T11, & T12), if so the ...
  49. Replies
    8
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    686

    For controls it is usually best to use a pot with...

    For controls it is usually best to use a pot with a linear taper rather than the more common logarithmic taper intended for volume controls etc.
  50. Replies
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    1,568

    We use to see the slow opening valves on the old...

    We use to see the slow opening valves on the old natural draft, standing pilot units with ribbon burners especially on the units with more than 3 burners where the crossover channel got pretty long.....
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