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  1. #1
    Join Date
    Feb 2011
    Location
    New York City
    Posts
    51

    Confused filter drier question

    Hey guys I'm working on a fujitsu 1.5 ton system which had a restriction right before the strainer into the capillary tube. I suspected the restriction to be within the capillary tube so I cut it out out along with the strainer only to learn the restriction was right before the strainer.

    The restriction is clear now. I know these small residential minisplits in most cases use capillary tubes with strainers only.. can I substitute the strainer in this small system with a a filter drier ? If so, how do I size it for my system (r-22) ? If not, can these strainers be purchased ?

    Thanks !

  2. #2
    Join Date
    Aug 2006
    Location
    Columbus Ohio
    Posts
    1,985
    Never mind.
    UA LU189

    10mm, because it's better than .45acp

  3. #3
    Join Date
    Jan 2009
    Location
    Kingston,Ontario
    Posts
    50
    You can buy the strainers from the manufacturer, and fujitsu recommends you do so. With that said I know a tech that threw a filter drier on his, been running for 2-3 years without issue.
    Keep in mind, the tech I'm refering to got his mini split used, (scavenged, customer upgraded a/c to a heat pump). So he was'nt a paying customer and did'nt care if it worked for long or at all, but he called tech support and they recommended against the drier and insisted on the factory strainer.

  4. #4
    Join Date
    Feb 2011
    Location
    New York City
    Posts
    51
    Quote Originally Posted by Naydrus View Post
    You can buy the strainers from the manufacturer, and fujitsu recommends you do so. With that said I know a tech that threw a filter drier on his, been running for 2-3 years without issue.
    Keep in mind, the tech I'm refering to got his mini split used, (scavenged, customer upgraded a/c to a heat pump). So he was'nt a paying customer and did'nt care if it worked for long or at all, but he called tech support and they recommended against the drier and insisted on the factory strainer.
    okay so i can get the strainer/capillary tube together. thats great info and i dont see why the filter drier wouldnt work. if it's sized for the correct tonnage it shouldn't alter the refrigeration effect too much. if i cant get the strainer that would be my second alternative.

  5. #5
    Join Date
    Feb 2006
    Location
    USA
    Posts
    4,381
    Is this the system from last week? If so glad you found the issue

    Sent from my HTC Sensation 4G using Tapatalk

  6. #6
    Join Date
    Feb 2011
    Location
    New York City
    Posts
    51
    Quote Originally Posted by hvac wiz 79 View Post
    Is this the system from last week? If so glad you found the issue

    Sent from my HTC Sensation 4G using Tapatalk
    yeah it is

    restriction right at the inlet of the strainer

  7. #7
    Join Date
    Feb 2006
    Location
    USA
    Posts
    4,381
    I wonder why that model # showed me it had an eev last week. But then again it showed 410 also .. Weird. Glad u found it.

    Sent from my HTC Sensation 4G using Tapatalk

  8. #8
    Join Date
    Jun 2006
    Location
    Omaha, Nebraska
    Posts
    861
    Fujitsu does not recommend installing one but I've also seen it done with no issues.

  9. #9
    you better stay with the strainer.

  10. #10
    Join Date
    May 2010
    Location
    Oxford, UK
    Posts
    336
    Have replaced a few of these strainers with 032 sporan driers on small cooling only non inverter units, one is still running 10+ yrs later having been moved twice.

  11. #11
    I was told not to install one due to the system does not have a true liquid line set. I have seen many installed and have have had none fail due to it being installed. I have only had 1 compressor fail and 1 reversing valve fail on me in many years of installations. I am very carefull on my installations and try to follow the installation guide to a tee so I don't have issues. Issues cost me money. They recomend flare fitting instead of brazed. Less likely of clogging a strainer.

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