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  1. #1
    Join Date
    Apr 2012
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    Annapolis,MD.
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    2

    Installing suction valve on a Carrier 30hxc

    Has anyone ever done this? We need to change the internal oil filter But our machines do not have the suction cut off valve. Cant see why this is an "option". So we have to pull the gas every time we do oil filter change. If anyone has any insight on this or has installed the valve give me a shout. Thanks.

  2. #2
    Join Date
    Jul 2007
    Location
    The Hot South
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    1,297
    Quote Originally Posted by moneyshot73 View Post
    Has anyone ever done this? We need to change the internal oil filter But our machines do not have the suction cut off valve. Cant see why this is an "option". So we have to pull the gas every time we do oil filter change. If anyone has any insight on this or has installed the valve give me a shout. Thanks.
    Why do you have to pull the gas every time you do a filter change? I've done many filter changes by pumping the unit down. Also how would you install a suction valve when the compressor is sitting on the suction line on top of the chiller barrel?

  3. #3
    Join Date
    Apr 2012
    Location
    Annapolis,MD.
    Posts
    2
    My Tech suggested it. Pulling the gas then rigging the compressor off the barrel then installing it. When I was in the field all of my screws had the valve. Ill look into pumping it down. Thanks for your help.

  4. #4
    Join Date
    Jul 2007
    Location
    The Hot South
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    All that work isn't necessary when it can easily be pumped down.

  5. #5
    Join Date
    Feb 2003
    Location
    Wichita Ks
    Posts
    1,457
    internal oil filter has a check valve. you only need to isolate the oil line. if check valve leaks then pump it down and then change the check valve also. as far as adding the suction shut off valve it is not hard just raise the compressor about a foot or so and install it.

  6. #6
    Join Date
    Jul 2010
    Location
    in a service van down by the river...........
    Posts
    229
    just curious, what exactly do you mean by pumping down and how do you accomplish this??

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  7. #7
    Join Date
    Jul 2007
    Location
    The Hot South
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    Quote Originally Posted by under pressure View Post
    just curious, what exactly do you mean by pumping down and how do you accomplish this??

    Sent from my PC36100 using Tapatalk 2
    Please tell me your just kidding....your a service tech, right? I see your a professional member.

  8. #8
    Join Date
    Jul 2010
    Location
    in a service van down by the river...........
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    Quote Originally Posted by R123 View Post
    Please tell me your just kidding....your a service tech, right? I see your a professional member.

    I was not trying to call you out...
    I was trying to determine if you are simply closing the liquid line and letting the compressor empty the cooler of refrigerant while running, or are you isolating the compressor and using a pump out unit to transfer gas to the condenser??
    my poor little brain went into overload thinking of all the possibilities.....lol

    Sent from my PC36100 using Tapatalk 2
    It's All about Heat.............................to a degree

  9. #9
    Join Date
    Jul 2010
    Location
    in a service van down by the river...........
    Posts
    229
    ???
    It's All about Heat.............................to a degree

  10. #10
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,702
    No need to install the suction service valve just change the filter using the procedure in the book using the external oil filter instructions.

    If you insist on the valve the compressor removal is a must.
    Seems like too much work to me.

    Quote Originally Posted by under pressure View Post
    ???

  11. #11
    Join Date
    Oct 2011
    Location
    La.
    Posts
    279
    Mountains out of mole hills.
    I bet Carrier paid a lot of money to have that procedure written and some choose not to read it.
    Below is the procedure that Carrier has on page 54 of the OIM. Happy reading.

    REPLACING THE EXTERNAL OIL FILTER
    Fully front seat (close) the angle valves on the filter and at
    the compressor. Connect a charging hose to the oil pressure
    bleed port and drain the oil trapped between service valves. A
    quart (liter) of oil is typically what is removed during this process.
    Remove the charging hose.
    Unscrew the nut from the other side of the filter and remove
    the old filter. Remove protective plastic caps from new filter
    and install. Draw a vacuum at the bleed port. Remove charging
    hose. Open angle valve enough to let oil flow. Check both fittings
    for leaks and repair if necessary. Backseat angle valve
    REPLACING THE INTERNAL OIL FILTER — Close the
    service valves at the compressor and drain the oil using the
    bleed port. If the oil pressure does not bleed off using this
    method it will be necessary to remove the entire circuit charge.
    Using a 3/4-in. Allen wrench, remove the internal filter access
    cover (see Fig. 22). Remove the old filter. Replacement filters
    (one for each compressor) are factory supplied to cover the
    first changeout. After that, filters are field supplied. Lightly oil
    O-ring in the filter and install with filter open end first into the
    housing. Replace access cover and retorque to 75 ft-lb
    (101 N-m). Follow procedure in previous section for opening
    angle valve and purging lines. Check for leaks and repair if
    necessary.

  12. #12
    Join Date
    Jul 2010
    Location
    in a service van down by the river...........
    Posts
    229
    +1......

    Sent from my PC36100 using Tapatalk 2
    It's All about Heat.............................to a degree

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