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An air handler, or air handling unit (often abbreviated to AHU), is a device used to condition and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system. An air handler is usually a large metal box containing a blower, heating or cooling elements, filter racks or chambers, sound attenuators, and dampers. Air handlers usually connect to ductwork that distributes the conditioned air through the building and returns it to the AHU. Sometimes AHUs discharge (supply) and admit (return) air directly to and from the space served without ductwork. Small air handlers, for local use, are called terminal units, and may only include an air filter, coil, and blower; these simple terminal units are called blower coils or fan coil units. A larger air handler that conditions 100% outside air, and no recirculated air, is known as a makeup air unit (MAU). An air handler designed for outdoor use, typically on roofs, is known as a packaged unit (PU) or rooftop unit (RTU). Air handler componentsFrom Wikipedia under the
GNU Free Documentation License  nlt.com 480px x 640px | 170.30kB [source page] National supplies long and short term storage Are you facing the following problems  nachi.org 480px x 640px | 28.60kB [source page] From Yahoo Image Search: "Air handler"  highperformancehvac.com Richard Sun, 14 Feb 2010 21:50:48 GM Installing duct smoke detectors or smoke detectors in . air handlers. are not ideal for protection of life and property in the event of a fire or smoke condition...  renosite.coinfers.com Tim Fri, 07 May 2010 19:00:51 GM When carrying out air conditioning repairs, a person should find the cooling coil, which will be inside the . air handler. unit. The . air handler. unit blows the air from the room across the cooling coil, which makes it cooler as it emits ...  electronic-air-cleaners.best-air-purifiers-guide.com khaldoun Sun, 09 May 2010 10:06:05 GM How do I clean a Carrier . Air Handler. ? Related Blogs. From Google Blog Search: "Air handler"  searchdatacenter.techtarget.com Mon, 07 Jun 2010 16:48:54 GMT+00:00 SearchDataCenter.com Let's say I have a normal air handler in the room 6 feet tall. If I put a 4 foot extension on every air handler and hot aisle, now I have raised my level to ...  datacenterknowledge.com Wed, 19 May 2010 18:34:14 GMT+00:00 Data Center Knowledge ... drawn into the enclosure through louvers in the side of the container which effectively functions as a huge air handler with racks of servers inside. ...  boxingscene.com Mon, 24 May 2010 12:53:34 GMT+00:00 Tournament BoxingScene.com ... of the referee who waved the bout off citing Saltykov didn't want to continue to a big displeasure of both Saltykov and his handler Oleg Bogdanov. ... From Google News Search: "Air handler" why is cold air blowing in the air handler closet? Q. when the ac is running and i open the door where the air handler is located i feel alot of cold air blowing. i think ill start keeping my milk in that closet! Asked by christopher t - Mon Jun 30 18:00:24 2008 - - 4 Answers - 0 Comments A. You have a leak in the duct work. Start where the duct work hooks to the air handler and start looking for leaks. In fact, do what ever you can to check out the ducts in the entire system. Including any ducts in th attic or basement. Make sure you check any joint, including where the duct hooks to the vents. Repair any leaks you find. Congratulations! You may have just found a very cheap and easy method of making a major cut in your AC bill. Answered by Typo - Mon Jun 30 18:09:09 2008 When you upgrade your ac unit do you have to upgrade the air handler? Q. I want to go from a 10 seer to a 16 seer a/c unit. Unfortunately the existing air handler is almost new. Asked by jensis7 - Wed May 20 16:54:31 2009 - - 3 Answers - 0 Comments A. When you say air handlerr does it include the evaporator coil or is this in addition to theair handlerr (fan box)? The most common thing to do is to upgrade the whole unit to allow multiple speeds on the fan portion of the unit. This increases efficiency. The coil will have to be changed because you will probably be changing refrigerants and/or metering devices for the refrigerant. You can probaly make it work, but should get a professional to look at the system. Most contractors wouldn't be afraid to tell you what they quote you and what the scope of the work is that they quoted. Answered by Hans E K - Wed May 20 17:10:41 2009 How do I bypass a fan relay circuit board on an AC air handler?
Q. My AC is not blowing air it seems because the control board is fried, the board has a fan relay which has 3 connectors, "SPT", "NO", and "NC", is there anyway to make the fan work by putting together any of the cables that connect to the relay, like the NO and the NC? I have ordered a new board online (HK61EA006) but in the meantime I am burning in Tucson, please help... Asked by JL Tucson - Sat Jul 12 03:38:33 2008 - - 3 Answers - 0 Comments A. Thor's right. Jump across the wire on the SPT terminal,. (may be black) to the wire on the NO terminal, (should definitely be black) and blower will run continuously until power is shut down to unit. (NC wire is probably red, maybe blue, and is for the lower blower speeds, used for heat) Hope this helps. 20+ yrs hvac tech Black- high speed, blue and yellow will be mid speeds, red will be low speed, white will be common, capacitor wires will be brown. These are standard colors for residential blower motors. If you're not comfortable jumping the motor wires out, by all means, don't do it. For my own purposes, (Buddy's garage furnace) I saved him from buying a $250 control board by using an auxiliary relay to run the blower,… [cont.] Answered by uncledjm14 - Sat Jul 12 06:07:49 2008 From Yahoo Answer Search: "Air handler" |
