by High Performance HVAC | Air Handlers |
An ECM Variable Speed Blower Motor in a squirrel cage blower
GE ECM Blower Replacement for a Trane Air Handler – I need to replace my Trane heat pump air handler motor, GE ECM 142 model 5SME39HL HY71, and am having difficulty finding a dealer or something online. Do you have any suggestions? Also, my technician gave me a quote of about $1000 to replace it. Does that sound right? Other discussion boards said installation is pretty straight forward and relatively easy. Would you agree? (more…)
by High Performance HVAC | Air Handlers |
With proper maintenance, you can avoid common air handler problems
Common Air Handler Problems - Everyone loves to be comfortable, so when there is a problem with the HVAC system, we can become very uncomfortable. The air handler in the HVAC system has electrical and mechanical components inside it that can experience problems from time to time. Some of the most common problems with air handlers can help you identify the problem and possibly fix the issue — many common air handler problems you can avoid with regular air handler maintenance.
Although some of the issues listed will need the attention of a professional HVAC technician to repair the air handler, after all, an HVAC technician will have all the tools and likely the parts available to make a fast and efficient repair. Furthermore, since every air handler is different it is possible the problems described here do not apply to your situation.
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by High Performance HVAC | Air Handlers |
Trane Air Handler AHU with Electric Duct Heater
Trane Air Handler AHU Electric Duct Heater - This Trane air handling unit photo shows a Trane AHU with an electric duct heater above the Trane air handler in the supply duct. In places where natural gas is not available and propane LP gas is impractical or not wanted. Electric heat makes a good source of heating. This electric duct heater is situated on the supply side of the air handler. Furthermore, many duct heaters are installed inside the air handler. (more…)
by High Performance HVAC | Air Handlers |
An ECM Variable Speed Blower Motor in a squirrel cage blower
Variable Speed ECM Blower Motors - Variable speed ECM blower motors have become increasingly popular in residential air conditioning and heating systems. From an engineering perspective, these motors increase the efficiency of the systems and offer a whole range of other benefits that help the system and the consumer. Furthermore, comfort is enhanced using ECM blower motors along with noise reduction. (more…)
by High Performance HVAC | Air Handlers |
Air Handler Water Coil Freeze Stat - The HVAC Air Handler Freeze Stat is a low-temperature limit control and it is used mainly in commercial systems in the ductwork on economizers or in air handlers just before any coil especially water coils. It is a safety and protection control to prevent extremely cold air from reaching the hot water or chilled water coils inside the air handler where the air enters from the economizer.
Under ideal control setup if the freeze stat trips the economizer dampers close and the blower fan stops. This prevents coils from freezing. A frozen coil can bust open and will need to be replaced if it freezes. This is the purpose of the freeze stat in HVAC air handler applications which utilize economizers for free cooling and other purposes.
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by High Performance HVAC | Air Handlers |
Find Tonnage on AHU | HVAC Equipment Nomenclature - How do I find out the tonnage on an AHU (Air Handling Unit)? The label/tag has faded all I have on file is the model number and the serial number, make.
Question Posted By Francisco the Building Engineer on May 3, 2011
Refer to the manufacturer’s website for their HVAC nomenclature of the model number and serial numbers and how those numbers correspond to the tonnage and other technical data. Or you can call your local dealer for the manufacturer and they will tell you. (more…)
by High Performance HVAC | Air Handlers |
Preventive Maintenance Air Handlers - These air handlers provide air conditioning for a zoned VAV system. The air handler is an integral part of an air conditioner system. The air handler contains a blower, air filters, some coils (DX or chilled water), hot water coils (not all air handlers have heating coils in them), and some controls. (more…)
by High Performance HVAC | Air Handlers |
Air Handler Components 3 - Hot water coils inside of air handler units combine a boiler system or a special capacity hot water heater and forced air to provide forced-air heating. The concept is simple and used a lot in commercial and some in residential.
Commercial systems almost exclusively use a boiler to provide hot water to the hot water coil inside the air handler unit while the residential systems use mainly special capacity hot water heaters to provide hot water to the hot water coil inside the air handler unit.
On a call for heat, a pump is energized to begin the circulation of hot water from the heating source to the coil. The air handler unit blower motor energizes and the air begins to move across the coil. Heat is exchanged from the hot water coil to the air and the air is delivered to its appropriate destination through the ductwork.
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by High Performance HVAC | Air Handlers |
Air Handler Unit Construction Phase | HVAC AHU - Air Conditioning and Heating AHUs provide air flow throughout the duct systems providing conditioned air throughout the spaces served by the duct work. Air conditioning and heating systems rely on air handlers to move the air throughout the system. The HVAC AHU also conditions the air. The air handler heats air for heating and cools air for air conditioning. (more…)
by High Performance HVAC | Air Handlers |
This MagicAire Air Handler serves as part of a large club and uses a DX (direct expansion) coil for cooling and a hot water coil in the air handler for heating. Many commercial air handlers are set up in this manner for heating and air conditioning. Hot water for the hot water coil is supplied from an oil boiler which supplies hot water to other air handling units in this building. In the center of the photo is the hot water coil and to the left, the line set which feeds the DX coil can be seen. (more…)
