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Thread: smoke detectors

  1. #1
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    May 2010
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    Fullerton CA
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    smoke detectors

    Smoke detectors going off everywhere. This is new building and first time turn on the heaters. I think when turn on the heater for first time usually burn off some of dust and oil residue burn and smokes little while. My question is how to bypass alarm until burn off all the residue in the heaters? Smoke detector shuts HVACs off before burn off residue.

    If I have to call contractor which one Fire Protection, HVAC, Electrician.

  2. #2
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    Stumptown,USA
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    What kind of heaters? What kind of building? Gaspacks? Electric unit heaters? Gas unit heaters? Fan powered boxes with reheat? Is this a Warehouse? An Office building? A manufacturing facility? A little more information would be helpful. Why are you doing this on SUNDAY?
    Challenge yourself, take the CM test --- Certificate Member since 2004 ---Join RSES ---the HVAC/R training authority ---www.rses.org

  3. #3
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    Jan 2009
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    Indiana
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    Are they all alarming or just one? U may actually have a serious problem and only attributing it to "dust"


    Depends how the system is wired...into a alarm/fire pane? talk to them...they may be able to put it temporary into test mode where u can reset when it alarms. They may also request you contact the installing HVAC contractor.

    THE DETECTOR ARE THERE TO SAVE LIVES....in 11yrs of service i have only gone on a handful of nuances calls...most alarms turned out to be actual problems.

  4. #4
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    Quote Originally Posted by RickCyin View Post
    Smoke detectors going off everywhere. This is new building and first time turn on the heaters. I think when turn on the heater for first time usually burn off some of dust and oil residue burn and smokes little while. My question is how to bypass alarm until burn off all the residue in the heaters? Smoke detector shuts HVACs off before burn off residue.

    If I have to call contractor which one Fire Protection, HVAC, Electrician.
    Should have the HVAC installation co. out to start up the heat.

  5. #5
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    Oct 2007
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    Milwaukee,WI
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    Quote Originally Posted by DavyB View Post
    Should have the HVAC installation co. out to start up the heat.
    I agree. Typically it's part of the contract to avoid these kinds of problems.
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  6. #6
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    Sep 2007
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    Australia
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    Quote Originally Posted by Paul Bee View Post
    What kind of heaters? What kind of building? Gaspacks? Electric unit heaters? Gas unit heaters? Fan powered boxes with reheat? Is this a Warehouse? An Office building? A manufacturing facility? A little more information would be helpful. Why are you doing this on SUNDAY?
    Lol @ "Why are you doing this on SUNDAY?"



    As for the problem
    A)I'm a sparky, not a fire sparky, but HOW MUCH SMOKE is coming off these things??? Smoke detectors are reasonable intelligent, ie they don't go off at a slight puff of smoke, it usually takes a decent amount. (Assuming it's not some kind of VESDA system)

    and B) If you bypass part of the fire detection system and are unlucky enough for something to go wrong, then the fine you'll cop will be so astronomical it will need to be printed over two sheets of paper to fit the whole amount in.

    Oh, and the fire protection guys will be pretty useful to get out, to answer your question. Depending on your system they might be able to narrow it down to an individual unit causing the problem
    The DDC system... guilty until proven innocent

  7. #7
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    central illinois
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    best way i found when starting a new unit [when it is a rtu ] is leave the panels off of blower compartment and heat xchanger if possible unhook blower contactor and fire it up. works pretty good for most units.
    work to live not live to work.

  8. #8
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    Feb 2007
    Location
    milford ct
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    put system on stand by and run the unit with all pannels off unill smell goes away
    If a Ram is a Sheep, And an Ass is a Donkey, Why is a Ram in the Ass a Goose?

  9. #9
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    Quote Originally Posted by local553 View Post
    best way i found when starting a new unit [when it is a rtu ] is leave the panels off of blower compartment and heat xchanger if possible unhook blower contactor and fire it up. works pretty good for most units.
    Unhook blower contactor? I'm not as brave as you. On down-shot rtu's I pull the blower panel and stick it in the supply. On just about anything else I pull the smoke head.
    Last edited by DavyB; 12-07-2010 at 08:21 PM. Reason: add

  10. #10
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    Mar 2009
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    central illinois
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    low voltage wires to contactor with power off i am not that brave either.
    work to live not live to work.

  11. #11
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    Quote Originally Posted by local553 View Post
    low voltage wires to contactor with power off i am not that brave either.
    I'm sorry, I didn't mean the power danger. I meant running the furnace without the IBM not functioning. Maybe I'm misunderstanding you.

  12. #12
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    Mar 2009
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    central illinois
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    it doe's not hurt anything let's you know your limits work lol.
    work to live not live to work.

  13. #13
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    Jun 2009
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    Quote Originally Posted by local553 View Post
    it doe's not hurt anything let's you know your limits work lol.
    You're right. I should be doing that to test the limits anyways. Just got to pay attention to melting plastic in the area, lol!

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