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  1. Thread: Robinair 15600

    by rpauls
    Replies
    12
    Views
    2,006

    Sounds like yours is working fine based on the...

    Sounds like yours is working fine based on the temp and micron reading on that 1 1/8 set. I have the little brother (the Robinair 15400) and I know the noise you are describing. Bought it used btw....
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    1,497

    Thanks.

    Thanks for all the replies. I've decided to blow it out with nitro today and re-evac. During the blow out I'll be able to see how much oil/mist comes out anyway. If there's any problem I'll post a...
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    1,497

    Since I posted earlier today I've been doing some...

    Since I posted earlier today I've been doing some research on this. Apparently the only potential issue is oil breakdown if the oils are incompatible. Seems like it might not be a problem since it is...
  4. Replies
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    Yeah, it sounds strange to me too. There is...

    Yeah, it sounds strange to me too. There is supposed to be a valve in the pump (Robinair 15400) to prevent exactly this, but it must not be working.

    I just checked the oil level now. There is...
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    Help. Vacuum pump oil sucked into system.

    Hi all,
    I was working on a system last week and got vacuum pump oil sucked back into the system during evacuation. After pressure testing I had vacuumed down to 500 microns and blocked off the...
  6. Replies
    8
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    733

    I assumed that guy meant to just wet the inside...

    I assumed that guy meant to just wet the inside of the tube, not fill it with water. So the comment was not motivated by a general desire to see others suffer;-)
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    Interesting. Then we need to boil. Tell me more....

    Interesting. Then we need to boil. Tell me more. What results would you expect.
  8. Replies
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    733

    Sorry, I don't understand. What calculation are...

    Sorry, I don't understand. What calculation are you referring to? Do you know of some formula?
  9. Replies
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    Vacuum pump performance. How fast?

    How fast should a vacuum pump pull down when connected directly to a micron gauge with copper line? I have a Robinair 15400. It pulls to 500 microns instantly (1-2 secs), but then takes up to two...
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    418

    Vacuum pump performance. How fast?

    Moved to pro tools forum.
  11. Replies
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    644

    Tough call. I also live in N NJ and have a 4 ton...

    Tough call. I also live in N NJ and have a 4 ton serving a 2600 sqft two story and it is perfect. I am so glad I didn't go with a 5 as some recommended. My AC is both cool AND dry. The humidity...
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    custom air filters?

    Can anyone recommend a good place to order custom air filters?

    I need 19.75 x 21 and 16.25 x 21,

    Both in 1 inch pleated.
  13. Replies
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    661

    Thanks very much for this link. This is...

    Thanks very much for this link.
    This is definitely helpful, and the animation is excellent!
  14. Replies
    6
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    661

    I've been googling all day. found nothing...

    I've been googling all day. found nothing technical.

    Can you suggest a search phrase?
  15. Replies
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    I checked robinair.com, but the just had high...

    I checked robinair.com, but the just had high level marketing type descriptions.
  16. Replies
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    Vacuum pump operation

    Hi all,
    I am looking for information on how a vacuum pump works. Specifically, the rotary vane, oil filled type such as Robinair or YJ. Does anyone know of a link describing the operation principles...
  17. Thread: AC as a hobby

    by rpauls
    Replies
    23
    Views
    1,323

    Christopher, You can PM me anytime. I'll help if...

    Christopher,
    You can PM me anytime. I'll help if I can. The hobby work started with heating and plumbing first. I really like hwbb systems. Hate forced hot air. The AC interest started with fixing...
  18. Thread: AC as a hobby

    by rpauls
    Replies
    23
    Views
    1,323

    Thanks. I feel a little better after hearing your...

    Thanks. I feel a little better after hearing your explanation. But honestly, the existence of hobbyists in a field does not in any way degrade the value of the true masters of the craft. You guys are...
  19. Thread: AC as a hobby

    by rpauls
    Replies
    23
    Views
    1,323

    Man that hurts. From what I read in the rules it...

    Man that hurts. From what I read in the rules it seemed like politeness was important in this forum, so I just thought I'd politely ask for permission to post. I don't see why you have to get so...
  20. Thread: AC as a hobby

    by rpauls
    Replies
    23
    Views
    1,323

    AC as a hobby

    Hi all. This is my first post.

    By profession I am an electrical engineer. HVAC is a hobby of mine. I just like it. I have studied technical books on the subject, and 7 years ago I installed two...
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