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  1. #1
    Join Date
    Jul 2006
    Location
    North Jersey
    Posts
    128

    Filling Carrier DH575 R-11 Chiller

    Got a call from a building owner that they had a building they acquired and it has a Carrier chiller with R-11 in it.

    Didn't think there were any of them around, and I was confident it was an old R-11 that had been converted, but no...It's an R-11. Maintenance guy says they (some other guys) started filling it in the winter, but with change of ownership, never completed it.

    Looks low on the sight glasses, so I agree it looks like it needs some. He says they were filling it with "gauges"....But from what I remember (about 12 years ago was the last time I worked on an R-11) - I used to pretty much fill them with a stainless steel washing machine hose. Valve on drum, attach hose to drum, attach hose to chiller fill port, purge line, start chiller, open valves, and let it pull the tank down.


    Anyone using gauges to fill R-11 units? Seems like it would be awfully slow.
    Maybe they were milking it, and getting paid by the hour.


    It's been so long, hope I haven't forgot too much about them.
    I like turbos

  2. #2
    Join Date
    Nov 2008
    Posts
    341
    You mean that you don't use a Manifold Gauge Set.

    No wonder it has been taking me so long.

    Of course I alway leave the depressors in as well.

  3. #3
    Join Date
    Dec 2010
    Location
    georgia
    Posts
    78
    Never used gages charging a DH or DG , Did it just like you did in the past.

  4. #4
    Join Date
    Sep 2008
    Location
    hog town,toronto,canada
    Posts
    61
    its time for a conversion don't you think ?

  5. #5
    Join Date
    Jul 2006
    Location
    North Jersey
    Posts
    128
    Quote Originally Posted by brianzeke View Post
    its time for a conversion don't you think ?
    It's time for ALOT of things at this site...Pumps are leaking, tower is rotting, pipes are rusting, and chiller looks like Frankenstein worked on it.

    Hope the new owners are prepared, the mechanicals are in grenade mode.

    "All we need is some refrigerant"

    Yeah, right.
    I like turbos

  6. #6
    Join Date
    Aug 2002
    Location
    Greenville SC
    Posts
    420
    Why convert? There's tons of R11 out there and it's cheaper than 123. Besides that the machine is to old to be spending a lot of money on it. I bet it also needs a control upgrade.

  7. #7
    Join Date
    Jun 2011
    Location
    Tucson, AZ
    Posts
    87
    Quote Originally Posted by chilbrig View Post
    Why convert? There's tons of R11 out there and it's cheaper than 123. Besides that the machine is to old to be spending a lot of money on it. I bet it also needs a control upgrade.
    I agree. Converting it is just wasting money. Plus you have to deal with updating the machine room to allow for refrigerant monitors and fans if you update it to R-123.

  8. #8
    Join Date
    May 2011
    Location
    North FL.
    Posts
    180
    I agree don't convert it to r123. Look it over, try and dig up history on her, back oil and vibration analysis and eddie current testing to determine machine condition,meg the motor, pull an oil sample for analysis. Service the starter and if it has a high eff purge run it manually. Get a start up data sheet on that machine and get your flows and check the tower and fan for operation. And slap her on the butt and lighter off. See how she acts listening, looking and touching everything at once. If she's smooth then check and adjust the charge by design with the evap approach, should be ten degrees, service oil and filters

  9. #9
    Join Date
    Feb 2007
    Location
    Baltimore MD ( Balimer, Murilyn)
    Posts
    140
    You're correct in your charging method.

    I wouldn't convert .... reclaim R-11 is plentiful and not taxed. Is the machine tight? Is there an oil level?

  10. #10
    Join Date
    Jul 2006
    Location
    North Jersey
    Posts
    128
    Who knows...They "only wanted refrigerant". It was about 300lbs low. We filled it today.

    Still surges every 20 minutes for a minute or two, but they "only wanted refrigerant" so I didn't touch or look at anything else...They got what they wanted.

    This is the type of place that has no money to maintain things, but has money to fix things.
    I like turbos

  11. #11
    Join Date
    Dec 2010
    Location
    georgia
    Posts
    78
    There seems to more of this type of operation any more,sad don't you think.

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