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  1. #1
    Join Date
    Oct 2019
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    Part of instalation or maintenance?

    Hi,
    We are renting an office space where the two rooftop HVAC unites were very recently replaced. When the gas company came to turn the gas on (for some reason it was shut off recently) and started the heating systems, they triggered the smoke alarm. The tech said the ducts have dust built up in them and that the filters have not been replaced. He thought it was odd that the company who replaced the units, didn't replace the filters and clean the ducts. The owner claims it is our responsibility under a maintenance contract since we have been here and only replaced filters in the systems, but I feel, this is something the installers should have done.
    Feels to me like having Your car engine rebuilt and the mechanic does his job well, but uses the old oil filter.
    Can you please give me your take on the matter?
    Thank you in advance!
    w

  2. #2
    Join Date
    Nov 2006
    Location
    Athens, Ohio
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    7,007
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    What did the contract for replacing the units state? That is all the installer (or "instaler" if you prefer) is obligated to do.
    AOP Rules: Rules For Equipment Owners.

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  3. #3
    Join Date
    May 2006
    Location
    Philadelphia, PA
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    It is not unusual for new RTUs to smoke when they are started. There is residual lubricant used in the manufacturing process, plus dust if they were stored in warehouses, that must be burned off. The fire alarm should have been put in test and depending on the unit, they may have been able to open it up and vent most of the smoke. I do not think the smoke was from anything other than the new unit not being "burned off" properly when started.

    The new units would get new filters in the unit. If the filters are in the building they might not have been replaced. Cleaning the ducts would not have been included.
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  4. #4
    Join Date
    Mar 2016
    Location
    Dayton Oh
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    2,018
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    Quote Originally Posted by comfortdoc View Post
    It is not unusual for new RTUs to smoke when they are started. There is residual lubricant used in the manufacturing process, plus dust if they were stored in warehouses, that must be burned off. The fire alarm should have been put in test and depending on the unit, they may have been able to open it up and vent most of the smoke. I do not think the smoke was from anything other than the new unit not being "burned off" properly when started.

    The new units would get new filters in the unit. If the filters are in the building they might not have been replaced. Cleaning the ducts would not have been included.
    I remember the first ever HX i replaced, was in a 20 ton carrier gas pack. Nobody told be about the oil burning off........... I sure cleared that retirement home out quick.

    now i know.

  5. #5
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,860
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    Quote Originally Posted by jbhenergy View Post
    I remember the first ever HX i replaced, was in a 20 ton carrier gas pack. Nobody told be about the oil burning off........... I sure cleared that retirement home out quick.

    now i know.

  6. #6
    Join Date
    Jun 2014
    Location
    Dover, DE
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    11,531
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    If the units were recently replaced, but the gas wasn’t on, how did the installing company run the heat to burn off the heat exchangers and commission the burners?
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