nmpl = … LATENT HEAT OF FUSION - The amount of heat energy, in BTU's required to change the state of one pound of a liquid to one pound of solid at the same temperature. VACUUM - Any pressure below atmospheric pressure. The quantity, or mass of air moving in one minute. Steel liquid-line driers are intended for use in all sizes and types of systems. CONDUCTION - The transfer of heat from molecule to molecule within a substance. VAPOR PRESSURE - The pressure exerted by vapor. ABSOLUTE ZERO - The temperature at which molecular activity theoretically ceases. Flooded – HVAC specific term. A trap may be placed at the base of a suction or hot gas riser to improve oil return up the riser. Please read AddThis Privacy for more information. High discharge temperature is the result of temperatures in the compressor head and cylinders becoming so hot that the oil loses its ability to lubricate properly. EQUIVALENT LENGTH - That length of straight tubing which has the same pressure drop as the fitting, valve or accessory (of the same nominal size) being considered. Dehumidification – the act of removing moisture from the air. In other applications other than HVAC this has a completely different meaning. The seals are broken when the lines are installed and the line charge becomes part of the total system charge. Refrigeration – Refers to coolers, chillers. On a different definition, coils also are part of electrical devices such as transformers. THERMOSTATIC EXPANSION VALVE - Refrigerant control which monitors the flow rate according to the superheat at the evaporator outlet. REFRIGERANT CONTROL - A device used to meter the amount of refrigerant to an evaporator. DISCHARGE LINE - A tube used to convey the compressed refrigerant vapor from the compressor to the condenser inlet. FREEZING POINT - The temperature at which the removal of any heat will begin a change of state from a liquid to a solid. Ton – A refrigeration ton is also referred to as 12,000 BTU’s/Hr, or 200 BTU/min. Package Unit – A single unit that consists of the evaporator, condensing coils, heaters, compressor, fan and blower motor all in one unit. This humidity eventually turns into condensation that must have somewhere to go. HVAC (heating, ventilation, and air conditioning) plans refer to the drawings made by specialized engineers that include all the details needed to create, set up, and maintain the heating and cooling system in a building.. Heating Ventilation Air Conditioning Training For Beginners. RELATIVE HUMIDITY - The percentage of water vapor present in a given quantity air compared to the amount it can hold at its temperature. Whether you are a service technician in the field, a dispatcher for an HVAC company, or a homeowner just wondering what the heck the service technician is talking about, here are a list of HVAC definitions that are used daily in the HVAC industry. Burnout – Compressor burnout, occurs when the compressor motor burns out do to open windings, and can heat up so much and actually burn the refrigerant, creating acid. REFRIGERANT VELOCITY - The rate at which refrigerant is moving at a given point in a system, usually given in feet per minute (FPM). Package units are popular for commercial buildings and mobile homes. Static Pressure in our industry has a unit of measure equivalent to inches water gauge. It is important that these coils are kept clean and free from debris and surrounding bushes, trees and other obstructions. PUMPDOWN - Process of pumping refrigerant out of the evaporator and suction line at the end of the on- cycle by closing a solenoid valve in the liquid line and letting the compressor shut-off by the low pressure control. A good practice for technicians is to pull a vacuum to 500 microns or less. CYCLE - The complete course of operation of a refrigerant back to a selected starting point in a system. Windings – Electrical coil found in motors, compressors, contactors, relays, and many other electrical components that are found in Hvac systems. Moves the blower wheel to move a volume of air in heating, cooling and ventilation applications. FAHRENHEIT - A temperature scale with the freezing point of water. The amount of heat needed to change 1 pound of water, by 1 degree, in one hour. Relay – A part that controls the voltage in a sequence, they can be normally open or closed. Condenser – The outside unit in a central air conditioning and heating split system. Condensate pumps are used in hydronic systems that cannot discharge excess condensate water via a gravity feed. Duct – Insulated material designed to transfer air throughout a place. We don't collect information from our users. PITCH - The slope of a pipe line for the purpose of improving drainage. [...] as an air compressor discharge line, to scare fish away [...] from the site; or, vi) Removal or exclusion of fish from the work area before the blast occurs. Liquid line is the line located after the condenser, following refrigeration cycle. EVAPORATOR SUPERHEAT - The actual temperature of the refrigerant vapor at the evaporator exit as compared to the saturated vapor temperature indicated by the suction pressure. Discus Valve: A hockey puck type discharge valve which minimizes refrigerant re-expansion volume common in reed valves. SIGHT GLASS - A glass installed in the liquid line permitting visual inspection of the liquid refrigerant for the purpose of detecting vapor in the liquid. EFFECTIVE TEMPERATURE - An arbitrary concept which combines into a single value the effect of temperature, humidity, and air movement as sensed by the human body. Metering Device – a device in the refrigeration cycle that meters the amount of refrigerant the enters the evaporator coil. Blower Motor – Located inside of the air handler/furnace. SUCTION LINE - A tube used to convey the refrigerant vapor from the evaporator outlet to the suction inlet of compressor. Low Voltage – Usually in HVAC any voltage >50 volts. CONDENSATION POINT - The temperature at which the removal of any heat will begin a change of state from a vapor to a liquid. Discharge Line Temperature. Gratuit. Ventilation – changing the amount of air in a place, exhaust fans are one example of a type of ventilation in HVAC. State – One of 3 major classifications of matter. Also known as central heating and cooling systems. Mini Split – A ductless split air conditioning or heating system. Miscellaneous » Construction. 1,000 watts,  1.34 Horse Power, 3.6 megajoules… Gasket Or Seal Included: ... An A/C discharge hose carries pressurized liquid refrigerant out of the compressor to the condenser in your A/C system. Non-Programmable Thermostat – The most simple type of thermostat to operate and set up, cannot be programmed to turn on and off at set days and times. CHECK VALVE - A valve designed to permit flow in one direction only. Blower wheels that get dirty or build up with debris may eventually restrict air flow or rotate out of balance. Select a store to see pricing & availability Bracket Included: No. Microns – The lower the number the deeper the vacuum, as measured with a micron gauge. Drain Pan – Attached to the evaporator coil, collects the condensation, and then drains out through the condensate drain line. Zone – Zoning system where dampers are installed in duct work to direct airflow, controlled by a thermostat, in most cases. HEAT FLOW - Heat flows from a warmer to a cooler substance. ABSOLUTE PRESSURE - Pressure measured with the base of zero. Normally found on outside condensing units supplying power to the compressor and fan motor, and also electric heating systems. The rate depends upon the temperature difference, the area exposed and the type of material. The new Trane Hyperions are positive pressure systems. DISCHARGE LINE - A tube used to convey the compressed refrigerant vapor from the compressor to the condenser inlet. Main types: screw, scroll, reciprocating, centrifugal and rotary. RECEIVER - A vessel for holding refrigerant liquefied by the condenser. Wet Bulb – a temperature of air used to evaluate the amount of humidity in the air. Discharge Line = Line Between the Compressor and the Condenser The discharge line should contain high temperature, high pressure superheated vapor Liquid Line = Line between the Condenser and the Metering Device THERMOSTAT - A bimetal actuated switch to close and open a circuit to indicate or terminate operation of a heating or air conditioning system. AddThis use cookies for handling links to social media. 240 volts to 24 volts. It is absorbed on contact with a solid surface. Sequencer – A type of relay usually used for electric heating, where circuits will open in a timed sequence. Humidistat – A device that is used to control the humidity level rather than the temperature. HEAT EXCHANGER - A device for the transfer of heat energy from the source to the conveying medium. Air Handler – Usually located inside of the home or business, in the attic, garage, or closet. These applications will - due to browser restrictions - send data between your browser and our server. Furnace – The place in the HVAC system where the heat transfer takes place when in heating mode, typically in oil or gas systems. The reciprocal of density. discharge - traduction anglais-français. Flows towards the air handler. SUCTION LINE ACCUMULATOR - A device located in the suction line that intercepts quantities of a liquid refrigerant and thereby prevents damage to the compressor. Contactor – a relay, that is normally open, and when voltage is applied to the coil it closes completing the circuit. CENTIGRADE - A temperature scale with the freezing point of water. High humidity inside of homes <60% could cause bacterial growth. Electric heat is one of the least efficient heating methods in HVAC. Liquid line – Usually the smaller line coming off the condenser. Used in HVAC. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. PRESSURE - TEMPERATURE RELATIONSHIP - The change effected in temperature when pressure is changed or vice versa. Condensing Coil – Heat exchanger usually located outside in the condenser. TEMPERATURE - A measurement of heat intensity. Someti… After all of the compressed refrigerant is out of the cylinder, the process repeats. AIR CONDITIONING - The process of controlling the temperature, humidity, cleanliness and distribution of the air. REFRIGERATION EFFECT - The amount of heat a given quantity of refrigerant will absorb in changing from a liquid to a vapor at a given evaporating pressure. Commonly used to measure the temperature of the liquid, suction and discharge lines. Take the pressure from the liquid line, and find the refrigerant temperature using PT chart, then subtract that from the liquid line temperature, which will need to be taken with a thermocouple clamp to get an accurate reading. Humidity – Refers to the amount of water vapor in the air. An increase in pressure results in a temperature increase. They are basically the heart of the refrigeration cycle and often the most expensive component in an hvac system. TON OF REFRIGERATION - The amount of heat of fusion absorbed by melting 1 short ton (0.893 long ton or 0.907 t) of pure ice at 0 °C (32 °F) in 24 hours. It is 'on' when the current is 'off", adding heat to shorten the off cycle. Insulation can be found in duct work, air handlers, suction lines and more. HVAC training is required!https://www.facebook.com/profile.php?id=100009858663026 Thermocouple – a Hvac technicians tool that hooks up to a meter capable of reading temperature. discharge line. Besides, suction lines are even more critical than discharge ones. Saturation – An HVAC term describing a substance when it contains all of another substance it can hold. When referring to air conditioning, is the amount of BTU’s it can remove in 1 hour. Some of the common major components in the condenser are the compressor, coils, and fan motor. LIFT - To elevate a fluid from one level to a higher level. CONVECTION - The transfer of heat by a moving fluid. En savoir plus. REFRIGERATION - The transfer of heat from a place where it is not wanted to a place where its presence is not undesirable. Condensate lines are typically made of plastic (commonly PVC) or sometimes metal, although plastic is prefered. Freon – Trademark name for older types of refrigerant. Discharge Line – The line between the compressor and condensing coil, carries vapor. OIL SEPARATOR - A device for separating out oil entrained in the discharge gas from the compressor and returning it to the crankcase. Example sentences with "discharge line", translation memory. Air Flow Distribution – The amount of air that is distributed throughout the designated space. Efficiency – The amount of energy an Hvac systems uses to operate, usually calculated by a SEER rating. 5. These driers are physically sized to minimize pressure drop and provide adequate volume for filtration and drying. LATENT HEAT OF MELTING - The amount of heat energy, in BTU'S, that must be removed to change the state of one pound of solid to one pound of liquid at the same temperature. Condensate Drain – Usually made out of pvc, cpvc, or copper, leads the condensate outside of the place or into another main drain of some sort. Short to Ground – When there is no resistance left from an electrical component to ground. Discharge Line: The high pressure, hot gas line coming out of the compressor. HEAT OF THE LIQUID - The increase in total heat (Enthalpy) per pound of a saturated liquid as its temperature is increased above a chosen base temperature. Blower Wheel – Attached to the blower motor. The temperature of the discharge vapor coming out of the compressor, however, is much more than the condensing temperature of 48.9 *C (120 *F).This is because the gas gets superheated while on its way from the evaporator to the compressor. REVERSING VALVE - A device in a heat pump that is electrically controlled to reverse the flow of refrigerant as the system is switched from cooling to heating; also called a four-way valve. PSYCHROMETRIC CHART - A chart on which can be found the properties of air under varying conditions of temperature, water vapor content, volume, etc. CAPILLARY TUBE - A refrigerant control consisting of a small diameter tube which controls flow by restriction. Insulation – A type of material that slows down the heat transfer process. Supply – The air leaving the air handler or furnace, and us usually directed through supply grills throughout a place. HEPA – a type of efficient air filter, acronym for High-Efficiency Particulate Air. SPECIFIC HEAT - The amount of heat necessary to change the temperature of one pound of a substance 1. TRAP - A depression or dip in refrigerant piping in which oil will collect. by Duct Kings | Mar 24, 2019 | Duct Cleaning | 0 comments. Giga-fren. Vapor – gaseous state of refrigerant. Variable Speed – Type of motor that adjusts speed as needed, these types of motors usually have programmed control modules. This could be gas, liquid or solid. patents-wipo . Tightening the quick connections ruptures the seals on the fittings and the line charge becomes part of the total system charge. When heated or cooled they will warp and can be made to open or close a switch or valve. Some smaller parts that make up the condenser are capacitors and contactors. LIQUID LINE - A tube used to convey the liquid refrigerant from the condenser outlet to the refrigerant control device of the evaporator. Solenoid – a valve that stops of flow of fluid or gas (refrigerant). Multi-meter – A Hvac technician tool that should be able to measure volts, amps, OHMS, MicroFarads and temperature. Overcharge, low condenser air flow due to improper motor or blade or dirty condenser coils. High voltage – There is no set voltage to be considered high when it comes to HVAC, but anything over 50 volts is a good place to start. EXTERNAL STATIC PRESSURE - The sum of the static and velocity pressures of a moving air system at the point of measurement. If the valve stem is between the front-seated and back-seated position, it is considered to be in the mid-seated position. COOLING ANTICIPATOR - A resistance heater (usually not adjustable) in parallel with the cooling circuit. BOILING POINT - The temperature at which the addition of any heat will begin a change of state from a liquid to a vapor. CONTACTOR - An electromagnetic actuated relay. Some of our calculators and applications let you save application data to your local computer. The end of the waste pipe should be cut at 45 degrees where it terminates into the grid to help reduce the potential for the pipe to freeze. It should be emphasized that since the 4-way valve was present during the measurements, heat is exchanged inside the 4-way valve from the hot discharge vapor line to the cold suction vapor line. Amps – a.ka. Most HVAC systems contain a form of refrigeration cycle which uses mechanical work acting on a fluid (in most cases refrigerant) to provide cool, dry air to livable spaces. HEAT TRANSFER - The three methods of heat transfer are conduction, convection and radiation. SENSIBLE HEAT - Heat that can be measured or felt. TOTAL PRESSURE - The sum of all partial pressures in a mixture of gases. ATMOSPHERIC PRESSURE - The weight of a 1 unit column of the earth's atmosphere. CONDENSING UNIT - The portion of a refrigeration system where the compression and condensation of refrigerant is accomplished. 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