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Hvac
| Question | Answer |
|---|---|
| Air Cooled system | Uses Freon as a refrigerant. Located outside and refrigerant lines are piped to it for indoor unit |
| Air Handler | Central air conditioning or heat pump system that moves heated or cooled air in a home. Furnace handles this in some cases |
| Blower | Air handling device for moving air in a distribution system |
| BTU | Measurement used for measuring the amount of heat required to raise the temp of one pound of water by one degree. |
| OBD | Opposed blade damper |
| Het | High Efficiency take off |
| RMVD | Round Motorized volume damper |
| CFM | Cubic feet per minute commonly used to measure the rate of air flow in an air conditioning system |
| Centrifugal Compressor | Compressor used in vapor compression refrigeration cycles where a rotating impeller is the device which compresses the refrigerant vapor. |
| Chilled Water system | System that has no refrigerant in the unit itself. Refrigerant is contained in a chiller, which is located remotely. Chiller cools water. |
| Compresser | Pump that moves refrigerant from the indoor evaporator to the outdoor condenser and back to the evaporator again. |
| Condenser | Transfers unwanted heat out of a refrigeration system to a medium. There are three types of condensers air cooled water cooled and evaporative |
| Condenser coil | tubes filled with refrigerant, normally located outside the home,that removes heat from the hot, gaseous refrigerant so that the refrigerant becomes liquid again. |
| Condensing unit | Mechanism that pumps vaporized refrigerant from evaporator, compresses it,liquefies it in the condenser and returns it to the refrigerant control. |
| Dehumidification | reduction of water vapor in air by cooling the air below the dew point. |
| Cop(coefficient of performance) | Measure of the energy efficiency of a chiller |
| Downflow | Air conditioning system that discharges air downward, directly beneath a raised floor, found in computer rooms or modern office spaces |
| Dowmflow Furnace | Pulls in return air from the top and expels warm air at the bottom |
| Electronic Air Cleaner | Device that filters out large particles and contaminants in indoor air. Pulls out magnetized particles such as bacteria, viruses |
| Freon | Hydrogenated simple hydrocarbon containing fluorine, chlorine or bromine used as refrigerants |
| Furnace | System which converts gas, oil, electricity or other fuel into heat for distribution within a structure |
| Glycol-cooled system | Air conditioning system that uses freon as refrigerant. Glycol cooled condenser is located inside the air conditionerwith the rest of refrigeration components. Water/glycol is piped to the unit from a drycooler or suitable source. Keeps the solution from |
| Heat exchanger | Device for the transfer of heat energy from the source to the conveying meduim |
| Heat Pump | Air conditioner that contains a valve that allows it to alternate between heating and cooling |
| Horizontal Furnace | Lies on its side pulling in return air from one side and expelling warm air for the other |
| Indoor unit | located in the house containing coil, fan, motor and filtering device |
| Indoor Coil | Refrigerant portion of fan coil unit typically made of several rows of copper tubing with aluminum fins |
| Integrally controlled motor (ICM) | Variable speed motor that operates at low rpm for efficiency and quiet operation, 90% efficient versus 60% efficiency for conventional motors |
| LCD | Liquid crystal display |
| Outdoor coil/condensing unit | portion of a heat pump or air conditioning system that is outside the home functions as a heat transfer collecting heat from a dispelling heat to outside air |
| Precision AC | systems that primarily desiigned for cooling electronic not people. |
| Purge device | device that removes air and water vapor from the refrigerant inside a chiller. Purge is necessity in negative pressure designs, |
| Refrigerant | Substance that produces a refrigerating effect while expanding or vaporizing |
| serge tank | a tank connected to a pipe carrying a liquid and intended to neutralize sudden changes of pressure in the flow by filling when the pressure increases and emptying when it drops |
| Split system | air conditioner consisting of two or more components.Compressor containing unit and condenser outside of the building. non compressor containing air handling unit installed building. commonly installed in home |
| Switchover | heat pump that reverses the flow of refrigerant as the system is switched from cooling to heating |
| upflow | air conditioning system that discharges air into the conditioned space on top mounted discharge plenum or overhead duct |
| upflow furnace | furnace that pulls return air in from the bottom and expels warm air from the top |
| Vacuum pump | pump used to remove air and moisture from a refrigeration system at a pressure below atmospheric pressure |
| water cooled system | air conditioning system that uses freon as a refrigerant and water as a condensing medium |
| Air standard | hvac term for air having a temp of 68 degrees and a relative humidity of 36% at 14.7 PSI |
| boiler | tank where heat produced from the combustion of fuels such as natural gas, fuel oil, or coal is used to generate hot water or steam. |
| Roof curb | Raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc. on a roof |
| Roof Cap | Located on the outside of the bin, directly in the center of the roof (i.e. right at the top of the bin). The roof cap can be opened to allow for increased airflow, especially when unloading the bin. |
Created by:
23tyguy