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  1. Replies
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    What a detour... 11 pages, all kinds of topics...

    What a detour... 11 pages, all kinds of topics and no satisfaction. I want to be compensated for my time by the producer of this thread.... Oh well...

    Dan
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    1,686

    :worthless:

    :worthless:
  3. I don't see any getting rich with 22

    There are so many cheap R12 drop-ins that I can't justify buying one of those virgin jugs someone has been holding on to for all these years. Same thing will probably happen with 22. Unit goes flat...
  4. Replies
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    4,852

    I don't trust the Super Nova that we have in the...

    I don't trust the Super Nova that we have in the shop. I use a JB DVN 22. I'd rather my micron gauge error high, if it's going to error. Bluevac sounds tempting, but have have to buy most of the...
  5. Thread: Control Problem

    by derb
    Replies
    4
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    794

    Brand and model of the controllers will help....

    Brand and model of the controllers will help. Each manufacture has their own way of doing things. The individual controllers should be capable of running in stand alone mode. From the vague and...
  6. Replies
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    2,998

    I'm sure using a generic 10k will get you within...

    I'm sure using a generic 10k will get you within 3 or 4 deg, but then why bother with the thermistor in the first place? Making sure the thermistor matches the temperature-resistance map will get us...
  7. Replies
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    2,695

    Some leaks only appear when they system is hot,...

    Some leaks only appear when they system is hot, under pressure and vibrating.

    Best I've had recently is a string of units at this building. Most short on gas. All brazed with the cores in and...
  8. Replies
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    2,998

    I want my SMAN to give me all the information on...

    I want my SMAN to give me all the information on one screen that my AK900 does. I want my AK900 to have clamps as great as my SMAN's. Since there is no fixing the display, I would love for someone to...
  9. Replies
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    I bought one last month, with a 23 lb of r409a,...

    I bought one last month, with a 23 lb of r409a, for $. I wouldn't pay for the high price for r12 and when I run out of r22 I'll buy whatever the "best" retro fit turns out to be. I like 12 and 22,...
  10. Replies
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    10,812

    How is it in your gauges? Do you use digital? ...

    How is it in your gauges? Do you use digital?

    Dan
  11. Thread: HVAC dew point

    by derb
    Replies
    6
    Views
    1,069

    Should be a whole section on it in whatever HVAC...

    Should be a whole section on it in whatever HVAC book you have. Being new to the industry I'd suggest "Modern Refrigeration", "Refrigeration & Air Conditioning Technology" or one of the other...
  12. Replies
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    1,447

    Some people have different was of dealing with...

    Some people have different was of dealing with transitions.
    Some do this:
    http://hvac-talk.com/vbb/picture.php?albumid=2772&pictureid=17241
    Better to do this:...
  13. Replies
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    1,447

    I was thinking about doing this same thing for my...

    I was thinking about doing this same thing for my personal system. The pressure drops for a coil range from .23 to .45. That is a huge restriction that wouldn't be tolorated in any heating only...
  14. Thread: Grease Fittings

    by derb
    Replies
    3
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    596

    I call them "Zerks" as well. Sometimes I find...

    I call them "Zerks" as well. Sometimes I find the fittings are defective and other times I find that the reservior they are feeding is either blocked up or full. The fittings are universial,...
  15. Thread: testo hook broke

    by derb
    Replies
    14
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    1,786

    Funny, both my SMAN3 and AK900 have taken 4 foot...

    Funny, both my SMAN3 and AK900 have taken 4 foot falls off condensers. I don't think it left any discernible marks. I'm to clumsy for a Testo.

    Dan
  16. Replies
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    Come back and let us know what they said. Dan

    Come back and let us know what they said.

    Dan
  17. Replies
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    I know his post is old, but I just wanted to...

    I know his post is old, but I just wanted to thank Osiyo for explaining all that. You helped me form an understanding of GPL and programming in general. I work for a facility that has many makes and...
  18. Replies
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    5,336

    Thermistors

    The sensors are my biggest disappointment with DigiCool. With my AK the High and low are always within 1.5 psig of each other, but the temp sensors!! Some times I just grab a pair of my self...
  19. Replies
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    1,236

    I'm still on metasys 4.1, but when I set up my...

    I'm still on metasys 4.1, but when I set up my alarm and link it to a reference set point and then set a high and low differential warning. Did they change this with the new version?

    Dan
  20. Replies
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    3,635

    :payattention: Last week I had a contactor...

    :payattention:

    Last week I had a contactor with a carbon trails on it between the legs. Unit blew three 60 amp fuses and tripped its MCC Breaker. With my old 902 I wouldn't have been able to see...
  21. Replies
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    7,245

    No where in the literature did I see anything...

    No where in the literature did I see anything about venting moisture between stages. I do see references to a hydrophobic pump oil, a debris catch tube, and a quick change oil reservoir. The Appion...
  22. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    I'm not using my manifold in the recovery...

    I'm not using my manifold in the recovery process. My point was concern for my recovery machine. The detection kits I've seen are for automotive applications, r12 and r134a, and have automotive style...
  23. Thread: AHU Coil cleaning

    by derb
    Replies
    9
    Views
    2,912

    We had a coil like this and spent tons of time...

    We had a coil like this and spent tons of time with a pressure washer and evap cleaner. Even hired a company. Just couldn't get it clean. Turns out it take more than just some dirt and dust to plug a...
  24. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    When I hook up to a system, my high side hose...

    When I hook up to a system, my high side hose fills with liquid refrigerant. When I disconnect I have either a low loss fitting or a ball valve on the high side hose. I disconnect the high side first...
  25. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    My question is in reguard to leak sealant, not uv...

    My question is in reguard to leak sealant, not uv die. Different products all together.

    Dan
  26. Replies
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    7,245

    Helps to prevent oil from being sucked into the...

    Helps to prevent oil from being sucked into the second stage of the vacuum pump during shutdown and to prolong the life of the pump oil when it is opened for the first part of the initial system...
  27. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    My understanding is that the leak sealer cures...

    My understanding is that the leak sealer cures when exposed to air. What happens when I take my hoses off to change them or to service my manifold? Will it start to gum up the ports and transducers?...
  28. Replies
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    3,635

    I had a 902 that endd it up growing legs. I like...

    I had a 902 that endd it up growing legs. I like it, but don't miss it to much. I do commercial work and the 902 couldn't check out high ohm sensors or mA dc signals. My stand by is a Fieldpiece...
  29. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    My concern is hooking up to a unit with this junk...

    My concern is hooking up to a unit with this junk in it and then at some later point taking my hoses of of my manifold and having it gum up my transducers.

    Can you constructively speak to that?...
  30. Thread: Digital Gauges

    by derb
    Replies
    94
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    14,909

    If I banged my analogs half as hard as I feel...

    If I banged my analogs half as hard as I feel comfortable banging my digitals, I think I would be buying one if not two replacement gauges for my manifold. The reality is that sets of digitals are...
  31. Replies
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    21,806

    I had the same hesitation and then once I bought...

    I had the same hesitation and then once I bought the first set, SMAN3, I wished I had done it years earlier. I was so confident in my decision that I bought my self the AK900s so I could have...
  32. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    Look what I found...

    Look what I found. Still don't know about the effects of this stuff on my tools.

    Oops, link will only work if you are a pro....

    Dan
  33. Thread: A/C Leak Freeze

    by derb
    Replies
    44
    Views
    13,851

    What happens when you hook your nice new DSRA up...

    What happens when you hook your nice new DSRA up to a system, with this stuff in it, and then at some point later you charge nitro into another unit or take the hoses off of your digitals? Do you...
  34. Replies
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    1,557

    The Supco VG64 is and entry level tool. ...

    The Supco VG64 is and entry level tool. Upgrading away from it will result in better results. It is nice to be able to trust what our tools are telling us.

    Dan
  35. Replies
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    21,806

    I just linked to a few of my posts and a thread...

    I just linked to a few of my posts and a thread or 2 that I participated in. There is a wealth of information out there. When searching for the testo 557 or other 3 digit search term, the board...
  36. Replies
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    21,806

    Have you tried the search function. I have done a...

    Have you tried the search function. I have done a couple. This
    , and thishttp://hvac-talk.com/vbb/showpost.php?p=12811991&postcount=100, here's an older one, and one just for the micron function.
    ...
  37. Replies
    31
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    2,242

    Update us with how things work out. Just a...

    Update us with how things work out. Just a warning, make sure you only turn the valves finger tip tight. I loaned mine to a couple of guys so they could check them out and now the seals are beat. Be...
  38. Thread: CFM Anemometers

    by derb
    Replies
    45
    Views
    7,300

    Do you have an update? I'm in the market for a...

    Do you have an update? I'm in the market for a new air test instrument. What quirks have you found with the instrument? Can you walk us through the learning curve a little?


    Dan
  39. Replies
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    2,242

    Lots if posts on the subject and it can be hard...

    Lots if posts on the subject and it can be hard to sift through them all to find anything more than unsubstantiated, or at least unexplained, opinions. I won't retype to much of what I said here, but...
  40. Thread: Gauge question

    by derb
    Replies
    112
    Views
    6,639

    I don't do much refrigeration, but if i had my...

    I don't do much refrigeration, but if i had my choice of favorites or an order. 500, 502, 404a,12, 401a, 409a, 134a, 22, 410a, 407c... I think that about covers my common use. The rest could go...
  41. Thread: Testo 435

    by derb
    Replies
    8
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    928

    Not hard to get at design temps with a fixed...

    Not hard to get at design temps with a fixed orifice metering device, if you are taking all your readings at the inlet and outlet of the unit. Of course, then you measuring unit efficiency. If you...
  42. Thread: Gauge question

    by derb
    Replies
    112
    Views
    6,639

    The manifold on both the Digi-Cool and Fieldpiece...

    The manifold on both the Digi-Cool and Fieldpiece are anodized aluminum. One gold and one black. I think the cage would be fine if you didn't bang it to hard. :grin2: If I banged my analogs half as...
  43. Thread: Gauge question

    by derb
    Replies
    112
    Views
    6,639

    Digitals are here to stay.

    I bought the SMAN3 and the AK900. At work we have an early Testo 523 and the new Yellow Jacket. The Testo was great for what it was when we got it, but it has limited functions, a small screen, and...
  44. Thread: Gauge question

    by derb
    Replies
    112
    Views
    6,639

    http://art4gis.com/gra/10M814_AS01.JPG These...

    http://art4gis.com/gra/10M814_AS01.JPG
    These gauges do a terrible disservice to digital gauges. The digital gauges most of us on the site refer to are solid state. These on the other hand are...
  45. Replies
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    14,788

    Have you bothered to check? I thought my micron...

    Have you bothered to check? I thought my micron gauges were fine until I bothered to check them against one another.

    Dan
  46. Thread: Gauge question

    by derb
    Replies
    112
    Views
    6,639

    Marvin, I agree. If, as a new tech, you can...

    Marvin, I agree. If, as a new tech, you can scrimp and save to make room in your budget I found that it actually saves money and increases understanding. No replacement analog gauges to replace each...
  47. Replies
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    1,189

    I tend to buy Johnson controls hex drivers. I...

    I tend to buy Johnson controls hex drivers. I have the standard L shape 1/16 hex wrench, or Allen wrench as we tend to call them, in my wallet. These are the two that I find the most convenient....
  48. Replies
    138
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    14,788

    I've got an idea for a couple different...

    I've got an idea for a couple different clamp/sensor setups. I'd like to start with just a raw thermister and a male plug instead of sinking $100 into a set of Velcro Digicool sensors that I'm going...
  49. Thread: Gauge question

    by derb
    Replies
    112
    Views
    6,639

    analog accuracy? feel good myth?

    I always wondered why I couldn't get my analogues to read the same exact pressure when I was doing my standing pressure tests. Turns out that is normal. Even if the discrepancy is up to 15 psig...
  50. Replies
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    2,356

    As was recomended, taking your charging manifold...

    As was recomended, taking your charging manifold or DRSA out of the mix and replacing it with this, http://yellowjacket.com/product/690, on a quality vacuum pump will make things go much faster. I've...
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