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Thread: coil cleaning

  1. #14
    Join Date
    Feb 2011
    Location
    Chesterfield, Virginia, USA
    Posts
    84
    With manufacturers using more fins/inch to try and get max efficiency out of system it is tough to get the embedded dirt, pollen, and debris out without using a foaming coil cleaner. The only issues that I have seen is when people do not rinse the coils well enough to completely remove the coil cleaner. Especially at the tube sheets.

    Oh, and with Micro Channel coils (ie. fancy name for radiators) they DO NOT recommend any coil cleaner just water. A step forward equals two steps backwards. But when you have engineers coaching a game they never played, this is what we get. I know EVERY service tech ALWAYS carries a pressure washer up his ladder.

  2. #15
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,148
    I use Viper coil cleaner on everything ,cond coils, evap coils, Econo screens, washable filters . Works great and won't reck the coils... Just needs alot longer soak time on dirty coils.

  3. #16
    Join Date
    Dec 2010
    Location
    Downingtown, PA
    Posts
    5
    Quote Originally Posted by Dchappa21 View Post
    I use Viper coil cleaner on everything ,cond coils, evap coils, Econo screens, washable filters . Works great and won't reck the coils... Just needs alot longer soak time on dirty coils.
    I use non acidic foaming cleaner. I apply cleaner with pump sprayer, coil guns are too wasteful in my opinion. I mix approx 40 to 60% strength. I judge contaminant level by condition of foam. If needed, I clean a 2nd time, inside to outside, by removing fan guard. Paying close attention to thoroughly rinse coil(s) an roof.

  4. #17
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by socotech View Post
    Just wondering how everybody else feels about putting chemicals on coils. I know sometimes you got to, but I try not to.
    In my area, a blue alkali cleaner, properly mixed, applied, and rinsed, is a must.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  5. #18
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by Failure2Comply View Post
    With manufacturers using more fins/inch to try and get max efficiency out of system it is tough to get the embedded dirt, pollen, and debris out without using a foaming coil cleaner. The only issues that I have seen is when people do not rinse the coils well enough to completely remove the coil cleaner. Especially at the tube sheets.

    Oh, and with Micro Channel coils (ie. fancy name for radiators) they DO NOT recommend any coil cleaner just water. A step forward equals two steps backwards. But when you have engineers coaching a game they never played, this is what we get. I know EVERY service tech ALWAYS carries a pressure washer up his ladder.

    When these coil designs have been out in the commercial world for a while, this is going to be a BIG source of service calls.

    (Now I fade my voice out like this and I cue the organist.....)

    at the commercial client's store, we find the service tech arriving for ANOTHER no AC service call...........

    "Thank God you are here. The AC has been out for two days!"

    "We are getting service calls all over with these new units. I'll get right up there."

    (10 minutes later)

    "Mr. customer, you unit locked out on hi pressure again. I reset it for you."

    "But you just cleaned the coils three weeks ago."

    "I know. We aren't allowed to use coil cleaner on these coils, and your company won't pay for a coil cleaning as a preventive maintnenance item every year, because we have several hundred feeet of hose, the pressure washer, the seond man.."

    ""Yes, I know. I'm just frustrated."

    "We are too. See you again."

    Tune in again next week for another exciting edition of "EPA Knows Best......."
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  6. #19
    Join Date
    Feb 2012
    Location
    Alabama
    Posts
    378
    I first read this thread this morning and figured I would just sit back and watch the fireworks. Took long enough for someone to light the fuse. To the OP how the hell are you going to make the unit cool if you dont clean the coils with coil cleaner. Water aint gunna do it! The coils that I have been familiar with in a commercial setting sometimes need to be washed 3 or 4 times WITH COIL CLEANER to get them clean. Coil cleaner use is fine, been doing it for 30 years. Just mix a more mild solution in some cases and rinse well.
    II Chronicles 7:14 Galatians 2:20 Ephesians 2:8-9

  7. #20
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    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by Tech it out View Post
    I first read this thread this morning and figured I would just sit back and watch the fireworks. Took long enough for someone to light the fuse. To the OP how the hell are you going to make the unit cool if you dont clean the coils with coil cleaner. Water aint gunna do it! The coils that I have been familiar with in a commercial setting sometimes need to be washed 3 or 4 times WITH COIL CLEANER to get them clean. Coil cleaner use is fine, been doing it for 30 years. Just mix a more mild solution in some cases and rinse well.
    I just did 6 stores in the past five weeks.

    The service brokerage was ADAMANT.

    NO effective coil cleaner could be used. And these are garden variety Lennox L series RTUs, nothing fancy.

    Some green evap cleaner and water. Period.

    We will be doing these again in late June, trust me. The worst part is, they know it's true, but the store corporate has a wild hair that they will have to pay for before that person gets fired.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  8. #21
    Join Date
    Feb 2012
    Location
    Opelousas La.
    Posts
    90
    We use coil cleaner all the time. I put it in the coil cleaning gun that you can set how strong it is mixed. For regular maintenance I use the 10 to 1 setting, and turn it up a little if it is really dirty. Just have to make sure you rinse it well. I find it really help break up the junk trapped in the fins.

  9. #22
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by La Air Man View Post
    We use coil cleaner all the time. I put it in the coil cleaning gun that you can set how strong it is mixed. For regular maintenance I use the 10 to 1 setting, and turn it up a little if it is really dirty. Just have to make sure you rinse it well. I find it really help break up the junk trapped in the fins.

    Maybe you are missing the point.

    The new design coils cannot take coil cleaner.

    Some stores won't let you use it on coils that can handle it.

    That's the nature of the issue.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  10. #23
    Join Date
    Feb 2012
    Location
    Alabama
    Posts
    378
    Its like one person already stated, the OP needed to be more specific. He just stated "coils". Of coarse there are exceptions to the rule but most of the time on residential/ light commercial coil cleaner can be used no problem. I prefer the alky cleaners, been burnt too many times. (literally)
    II Chronicles 7:14 Galatians 2:20 Ephesians 2:8-9

  11. #24
    Join Date
    Feb 2012
    Location
    Alabama
    Posts
    378
    Quote Originally Posted by timebuilder View Post
    Maybe you are missing the point.

    The new design coils cannot take coil cleaner.

    Some stores won't let you use it on coils that can handle it.

    That's the nature of the issue.
    Why don't they want to let you use it? Are we talking tree huggers here?
    II Chronicles 7:14 Galatians 2:20 Ephesians 2:8-9

  12. #25
    Join Date
    Feb 2006
    Location
    USA
    Posts
    4,381
    Quote Originally Posted by timebuilder View Post
    When these coil designs have been out in the commercial world for a while, this is going to be a BIG source of service calls.

    (Now I fade my voice out like this and I cue the organist.....)

    at the commercial client's store, we find the service tech arriving for ANOTHER no AC service call...........

    "Thank God you are here. The AC has been out for two days!"

    "We are getting service calls all over with these new units. I'll get right up there."

    (10 minutes later)

    "Mr. customer, you unit locked out on hi pressure again. I reset it for you."

    "But you just cleaned the coils three weeks ago."

    "I know. We aren't allowed to use coil cleaner on these coils, and your company won't pay for a coil cleaning as a preventive maintnenance item every year, because we have several hundred feeet of hose, the pressure washer, the seond man.."

    ""Yes, I know. I'm just frustrated."

    "We are too. See you again."

    Tune in again next week for another exciting edition of "EPA Knows Best......."
    who gets a second man for cleaning coils ?? wish i did but this regime i work under doesnt seem to give a rats a$$ about giving anyone help . . well a couple guys do but thats another story .... im talking 12-14 unit rtus with hundreds of feet of hose lol .. evap coils to be cleaned also in that scope ..... but they send 2 guys to change an enthalpy sensor & actuator motor . . . .

  13. #26
    Join Date
    Feb 2012
    Location
    Opelousas La.
    Posts
    90
    Quote Originally Posted by timebuilder View Post
    Maybe you are missing the point.

    The new design coils cannot take coil cleaner.

    Some stores won't let you use it on coils that can handle it.

    That's the nature of the issue.
    Sorry. I didn't think the original poster meant it like that. Thought he meant coil cleaner in general. But I do understand that micro channel coils shouldn't be cleaned with chemicals.

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