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  1. #14
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,128
    Back in the days of R11 I used a small, one-piece pump that I believed was intended for "pool duty". It had a direct drive rubber impeller. It worked fine until R123, and its lower pressure, appeared on the scene.The vacuum in the oil sump was to great for that pump to overcome. Then I bought the smallest coupled gear pump (and motor to drive it) that I could find in Grainger's catalog. In 25 years those were the only pumps I used for that purpose. Although that little pool pump got to where it would sometimes spark pretty good while running! lol, ahhh, good times.

  2. #15
    Join Date
    Jul 2003
    Location
    Orange County N.Y.
    Posts
    1,176
    I might have a co-worker who uses a gear pump off of a generic small oil burner. He may connect it with a standard 1/2" drill and whatever fittings that are necessary. Of course I can't recommend this type of home made contraption but it seemed to work well enough from what I've seen. It easily overcomes the vacuum on a low pressure chiller.

    ...Ron
    Roof Rat

  3. #16
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
    Posts
    1,618
    Find a good Industrial oil fired boiler thats being demoed and if there is one piece of salvage that you want its the gear pump for that boiler the rest is up to you to modify it to your personal spec's.
    Arguing with your Boss is like wrestling with a pig in
    mud.
    After a while you realize that while you are getting
    dirty, the pig is actually enjoying it.

    It is not exactly cheating, I prefer to consider it
    creative problem solving.

    25 years ago we had Bob Hope , Steve Jobs , and Johnny Cash today we have no Hope no Jobs and no Cash !
    I can fix broke but i can't fix stupid !

  4. #17
    Join Date
    Oct 2010
    Location
    oklahoma city
    Posts
    57
    Thanks, guys. I'm in Oklahoma, where natural gas is king. I've never personally laid eyes on an oil-fired anything. I will likely buy both a pump and portable heater, both are good to have and the boss is willing to buy whatever I need. I appreciate all your input.

  5. #18
    Join Date
    Sep 2004
    Location
    Kansas City, Kansas, United States
    Posts
    13,833
    providing that the chiller is off?

    just turn the chilled water pumps on for a while!

    i accidentally left a pump in hand last night to a 410a chiller.
    went back this morning and here is the result!



    Name:  chwpumpsonn.jpg
Views: 120
Size:  81.2 KB
    I WILL SELL WORK,GENERATE BUSINESS, GO GET NEW CUSTOMERS!
    YOU SHUT THE HELL UP AND QUIT RUNNING YOUR MOUTH!

  6. #19
    Join Date
    Mar 2007
    Posts
    3,134
    If you've got a big domestic water boiler and storage tank near the chiller, you can run some hoses from that tank, in and out of the chiller, and right down the drain. Don't need any more than 2-3 GPM flow.
    The key to happiness is lower expectations.

  7. #20
    Join Date
    Mar 2007
    Posts
    3,134
    Quote Originally Posted by supertek65 View Post
    providing that the chiller is off?

    just turn the chilled water pumps on for a while!

    i accidentally left a pump in hand last night to a 410a chiller.
    went back this morning and here is the result!



    Name:  chwpumpsonn.jpg
Views: 120
Size:  81.2 KB
    Did it pop the relief valves?
    The key to happiness is lower expectations.

  8. #21
    Join Date
    Sep 2004
    Location
    Kansas City, Kansas, United States
    Posts
    13,833
    somehow it did not???

    may be because the position of the 3 way valve while not in mechanical cooling?

    i had one chiller valved off.

    then again maybe it did?

    luckily they are small chillers with MDX condenser coils so they dont hold much 410a if it did blow!


    Quote Originally Posted by Tech Rob View Post
    Did it pop the relief valves?
    I WILL SELL WORK,GENERATE BUSINESS, GO GET NEW CUSTOMERS!
    YOU SHUT THE HELL UP AND QUIT RUNNING YOUR MOUTH!

  9. #22
    Join Date
    Mar 2003
    Posts
    7,326
    big old blankies? they warm me up just fine.

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