Installing Window-Type Air-conditioning Units

Definition of Terms

Code No. Installing Window Type Date: Developed Date: Revised Page #
Air-conditioning Units
148 of 150

Air Cleaner - Device used to remove airborne impurities
Air conditioner - Device used to control temperature, humidity, cleanliness, and

Air Conditioning movement of air in a confined space
- Control of temperature, humidity, cleanliness, and movement of air in
Alternating
Current (AC) a confined space
- Electric current in which direction of flow alternates or reverses. In 60
Amperage
cycles (Hertz) current, direction of flow reverses every 1/120th of a
Ampere second
Anemometer - Electron or current flow of one coulomb per second past given point in
Circuit circuit
-
Circuit breaker - Unit of electric current equivalent to flow of one coulomb per second
Cold - Instrument of measuring the rate of airflow or motion
Compression - Tubing, piping or electrical wire installation which permits flow to and
from energy source
Compressor - Safety device which automatically open an electrical circuit if overload
- The absence of heat; a temperature considerably below normal
Condensate - Term used to denote increase of pressure on a fluid by using
Condensing Unit mechanical energy
- Pump of a refrigerating mechanism which draws a low pressure on
Conductivity cooling side of refrigerant cycle and squeezes or compress the gas
Conductor into the high-pressure or the condensing side of the cycle
Direct Current - A fluid formed when a gas is cooled to its liquid state
(DC) - Part of the refrigerating mechanism which pumps vaporized
Energy refrigerants from the evaporator, compress it liquefies it in the
Evaporator condenser and return it to the refrigerant control
- Ability of a substance to conduct or transmit heat and/or electricity
Evaporator fan - Substance or body capable of transmitting electricity or heat
- Electron flow which moves continuously in one direction in circuit
Fan
Fuse - Actual or potential ability to do work
- Part of refrigerating mechanism in which the refrigerant vaporize and
Gas
Ground wire absorb heat
- Fan which increases air flow over the heat exchange surface of
Heat
evaporator
Liquid - Radial or axial flow device used for moving or producing flow of gases
- Electrical safety device consisting of strip of fusible metal in circuit
Motor
which melts when circuit is overloaded
Ohm - Vapor phase or state of substance
- Electrical wire which will safely conduct electricity from a structure into
Ohmmeter
Ohm’s Law the ground
- Form of energy which acts on substance to raise their temperature;
Code No.
energy associated with random motion of molecules
- Substance whose molecules moves freely among themselves, but do

not tend to separate like those of gases
- Rotating machine that transforms fluid or electric energy into a

mechanical motion
- Unit of measurement of electrical resistance. One ohm exist when

one volt causes a flow of one ampere
- Instrument used to measure resistance
- Mathematical relationship between voltage, current and resistance in

Installing Window Type Date: Developed Date: Revised Page #
Air-conditioning Units
149 of 150

Power an electric circuit
Pressure - Time rate at which work is done or energy is emitted; source or
Refrigerant
means of energy
Resistance - Energy impact on a unit; force or thrust on a surface
Superheat - Substance used in refrigerating mechanism. It absorbs heat in

Temperature evaporator by change of state from liquid to gas, and release its heat
Thermometer into the condenser as the substance returns from the gaseous state
Thermostat to the liquid state
Timers - An opposition to flow or movement; a coefficient of friction.
Velocity - Temperature of vapor above its boiling temperature as a liquid at that
Voltmeter pressure; The difference between the temperature at the evaporator
Watt outlet and the lower temperature of the refrigerant evaporating in the
evaporator
- Degree of hotness or coldness as measured by a thermometer;
Measurement of speed of motion of molecules
- Device for measuring temperature
- Device which senses ambient temperature conditions and in turn,
acts to control a circuit
- Clock operated mechanism to control opening and closing of an
electrical circuit
- Quickness or rapidity of motion, swiftness, speed
- Instrument used to measure voltage
- Unit of measurement for power

Code No. Installing Window Type Date: Developed Date: Revised Page #
Air-conditioning Units
150 of 150