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  1. I have picked up faults in the wiring from the...

    I have picked up faults in the wiring from the contactor , starter , or VFD with a meggor that a typical ohm meter wouldn't detect .
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    High Pressure Switch was not by-passed upon my...

    High Pressure Switch was not by-passed upon my arrival - can not say the status prior to my arrival . It was the second thing I investigated that night . Still waiting approval to return . I feel...
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    Response was thier devices are tested and rated...

    Response was thier devices are tested and rated to labeled pressures . They have no control of installation practices or techniques .
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    I am still awaiting the go ahead for further work...

    I am still awaiting the go ahead for further work at this facility . That unit repairs got pushed back due to a major BAS system loss of communications to ALL systems ; HVAC , lighting , dock door...
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    Waiting for approval to proceed . I should get go...

    Waiting for approval to proceed . I should get go ahead later this week .
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    Yes there is a JCi Metasys on-site . I'll need to...

    Yes there is a JCi Metasys on-site . I'll need to see how much they will allow me ; seem to be very protective of thier controls system . That alone has me a little suspicious . I can navigate the...
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    There is no check valve in liquid line that I...

    There is no check valve in liquid line that I have seen yet . Airflow readings are very close to design / start-up reports .
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    One drier ( Sporlan OEM ) failed at the end weld...

    One drier ( Sporlan OEM ) failed at the end weld - perfect separation - looked like it could have been cut with a band saw . The other drier was an Alco / Emerson ( field installed when compressor...
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    No welded contactors . No pump down in use on...

    No welded contactors . No pump down in use on these units . This could get interesting as there 34 of these systems with 4 circuits each . Equipment is approx 9 - 10 years old . I have already had...
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    No liquid line solenoids . However there is a...

    No liquid line solenoids . However there is a diverting valve in the discharge line to bypass the condenser to go to reheat coil during dehumidification
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    Thanks for the feed back everyone . One drier...

    Thanks for the feed back everyone . One drier came apart at the end weld - perfect separation. the other had the casing blow out just about dead center . High pressure switches verified and...
  12. I am wondering if there is moisture in the system...

    I am wondering if there is moisture in the system ? Pull a refrigerant sample also . One can not debate science .
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    POLYUREA is the only grease for motors on VFDs ....

    POLYUREA is the only grease for motors on VFDs . DO NOT MIX GREASE.
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    None that I have seen . Need to give it 100%...

    None that I have seen . Need to give it 100% evaluation . It was dark and had to deal with the media / TV crews ! " NO COMMENT " as they have my chariot in background
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    I am LONG DAY / NIGHT

    I am
    LONG DAY / NIGHT
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    Ruptured Filter Driers

    I have a facility which has several AAON RTUs . The refrigerant is R410a . The past month two ( 2 ) liquid line filter driers have ruptured . One was OEM installed Sporlan and the other ( ALCO /...
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    I always pump some oil into the suction prior to...

    I always pump some oil into the suction prior to start to prevent a " DRY START " never lost one on start up
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    I use the " PEPTO - BISMOL " mixture on the...

    I use the " PEPTO - BISMOL " mixture on the FRICKS . ( 567 with the " RED " )
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    I have repaired YORK YTs with corroded charging...

    I have repaired YORK YTs with corroded charging lines at the chiller barrel . I love the feel of hot sparks landing on me .
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    Weld the flange to the chiller barrel . Been...

    Weld the flange to the chiller barrel . Been doing this for the past several years . My friend in North Carolina is doing same thing . If it has to come apart again cut the liquid line and weld it...
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    What manufacture , model & heat source would help...

    What manufacture , model & heat source would help to get information to you . ABSORBERS are unique machines . One either can work on them or " SALT " them up ! I have responded MANY times to service...
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    " It's hard stop a TRANE " " It takes an...

    " It's hard stop a TRANE " " It takes an icing and keeps on pumping "
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    Notice the tile is pitched with a cable tie on...

    Notice the tile is pitched with a cable tie on the grid
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    I remember a nightmare MANY years ago ( 1985 -...

    I remember a nightmare MANY years ago ( 1985 - 1987 ) had a YORK RTU Heat Pump with a check valve header similar to what your pic shows . It still wakes me up at night !
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    I don't like to alter FACTORY cabinets ; however...

    I don't like to alter FACTORY cabinets ; however the installation of a small air mover to reject cabinet heat maybe an option .
  26. I am leaning towards oil saturated refrigerant....

    I am leaning towards oil saturated refrigerant. Do you know complete history ? With information given , I would pull and distill refrigerant ; observe the quanity of oil that remained in recovery...
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    LOW PRESSURE MAN NO PRESSURE LOW PRESSURE ( as...

    LOW PRESSURE MAN NO PRESSURE LOW PRESSURE ( as long as I have 50*F water around I can change a shaft seal )
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    I hope it was thier first AND last install ! That...

    I hope it was thier first AND last install ! That is a text book list of things NOT to do !
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    I prefer a sharpened pencil then cut it flush ;...

    I prefer a sharpened pencil then cut it flush ; the oil will expand the pencil to fill any voids . Be sure to use EXECUTIVE BEIGE paint to make it look OEM ; if its a YORK same procedure but use...
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    One aspect to focus on would be what control...

    One aspect to focus on would be what control panel is being used .
  31. It usually is never just one thing. People joke ;...

    It usually is never just one thing. People joke ; " You are the only person I know that turns replacing an open fuse into a week or more worth of work "
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    It maybe better to replace the compressor ....

    It maybe better to replace the compressor . Without knowing the conditions ; once you open it up , who knows what you will find and have lost days of down time . If you have the time , yes go for...
  33. In my opinion with it being a split system I am...

    In my opinion with it being a split system I am wondering if pipped properly . Where is the condensing unit vs the evap . I had a project years ago that replaced compressors every year . I was asked...
  34. Only thing I will add ( and this has come from...

    Only thing I will add ( and this has come from many different manufacture TECH SUPPORT ) the electronics gets caught up in a loop due to a power indifference and removing power and restoring power...
  35. What is the cooling mean of the condenser ? What...

    What is the cooling mean of the condenser ? What refrigerant ? What is the evaporator trying to do ? NEED MORE INFORMATION !
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    I would also suggest a Rigid E-110 . It is small...

    I would also suggest a Rigid E-110 . It is small and opens wide and VERY useful . It doesn't have teeth on the jaws however great for pipe unions
  37. I have parked many rental chillers . They set...

    I have parked many rental chillers . They set outside and pipped into the building ; either fire hose or Victaulic PVC . Power is obtained either from disabled chiller starter or have a generator...
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    How many fan blades will fail and destroy coils...

    How many fan blades will fail and destroy coils and pipping ?
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    Good work isn't cheap / cheap work isn't good !

    Good work isn't cheap / cheap work isn't good !
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    Need more information . Operating refrigerant...

    Need more information . Operating refrigerant pressures , water temperatures , pressure in / out , amp draws , % load , etc .
  41. Park and connect a rental. Then evaluate your...

    Park and connect a rental. Then evaluate your options .
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    Every sample that I ever sent to HURGURTH came...

    Every sample that I ever sent to HURGURTH came back stating moisture was present recommended oil and filter driers be changed . NRI seemed to be the most reliable
  43. Check with the manufacture .

    Check with the manufacture .
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    Verify the wiring for the sensors are landed...

    Verify the wiring for the sensors are landed correctly and not crossed between circuits ; EX ; circuit one sensors landed on terminals for circuit two
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    I recommend oil analysis every year ;...

    I recommend oil analysis every year ; approximately the same time with the same lab . The readings can be used to verify to the operator / customer on potential problems . If they neglect to heed...
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    I converted many YORK YS lines to stainless used...

    I converted many YORK YS lines to stainless used evap barrel to form the radius . Installed stainless on TRANE machines also
  47. I have to say ; you are way in over your head by...

    I have to say ; you are way in over your head by viewing your post . Call in HELP .
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    I am betting the " vent pipe " was not to be...

    I am betting the " vent pipe " was not to be installed : and was added because of another problem
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    Yea , they kinda don' t want to operate with that...

    Yea , they kinda don' t want to operate with that fault .
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    It Happens .

    It Happens .
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