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Call Us Today!
(512) 258-3222
Call Us Today!
(512) 258-3222

Glossary

AIR CONDITIONING:
To add heat or remove temperature and humidity in the form of condensation and promote clean air in a building.

B.T.U:
British Thermal Unit, the quantity of heat required to raise one pound of water one degree in Fahrenheit.

BURNER:
A part in the furnace where gas is injected into the heat exchanger, along with the correct amount of combustion air for proper ignition and burning of the gases. Yearly service of this part should be done by a professional service technician.

CAPACITOR:
An electric device consisting of two or more conducting plates separated from one another by an insulating material and used to store an electrical charge. There are RUN capacitors and START capacitors.

CIRCUIT BOARD:
A laminated electrical board, usually fitted with electronic components used in furnaces, boilers, air handlers and condensers to control most of the functions of the equipment. Some of these boards also have relays on them. To see a board click here See a Printed Circuit Board

COMPRESSOR:
A "PUMP" is used in air conditioning systems and usually located in the CONDENSER to move a refrigerant through an EVAPORATOR and back to a CONDENSER. This compressor changes the temperature and state of the refrigerant if it is operating correctl and is located in the CONDENSER. This is the most expensive part of an air conditioning system to replace and should be checked yearly by a professional service technician.

CONDENSER:
The piece of equipment used to remove the heat that has already been removed from a building. It is usually located at ground level, but can be mounted on a roof.

CONDENSER COIL:
A series of aluminum or copper tubes, with aluminum plates or spinney fins attached to them, are used to dissipate heat, which the COMPRESSOR has removed from the building. This is located in the CONDENSER.

CONDENSER MOTOR:
The motor which turns the condenser fan blade in the CONDENSER, which removes heat from the CONDENSER COIL.

CONDENSATE PUMP:
A small pump used to pump the condensate water, which was removed by the EVAPORATOR COIL.

CONTACTOR:
An electrical relay which controls the flow of electricity to different components in the system.

DISCONNECT BOX:
An electrical box used to shut off equipment for servicing. Some of these have fuses or circuit breakers in them.

DUCT BOARD:
A fiberglass sheet, usually used to build plenums, trunks drops and sometimes ducts themselves in a typical building duct system

DUCTWORK:
A system used to move heated or cooled, filtered air through a building consisting of plenums, metal or flexible pipes. These are connected to such things as grilles, registers, boots and return drops. Plenums, trunks and drops may be constructed of sheet metal and/or fiberglass duct board material.

EVAPORATOR COIL:
A series of aluminum or copper tubes usually covered with aluminum plates, used to remove heat and humidity as condensation in a cooling system. This part is usually mounted above or below the blower in a furnace or air handler and is an integral part of a package unit. There is a condensate drain attached to the coil and runs to a floor drain, directly outdoors or to a condensate pump.

FLUE:
A pipe or series of pipes used on a gas or oil furnace, fireplace or any other fossil fuel burning piece of heating equipment. This flue is connected to the heat exchanger and must be kept clean and in good condition.

GAS VALVE:
An electro/mechanical device used in a gas furnace or package heating unit. This device opens and closes on command of the building thermostat to inject gas into the heat exchanger through the burners.

HEAT EXCHANGER:
The metal enclosure in a gas furnace, oil furnace or package heating system where the gas or oil is burned. The air from the building is circulated around this enclosure and picks up heat to be sent to the occupied space through ductwork. In NO WAY can there be a connection between these gases that are burned and the air being delivered to the occupied space as carbon monoxide poisoning and death can be the result. A yearly check of your heating system should be done by a professional service technician.

HEATING:
To raise the temperature in a building by burning fossil fuels such as liquefied petroleum, natural gas, refrigeration, or with electricity using gas furnaces, boilers, heat pumps, and package air conditioning.

HEAT PUMP:
A heating and air conditioning piece of equipment used to both HEAT and COOL a building. This really is a "Reverse Acting Air Conditioner". It is capable of reversing the flow of refrigerant in a cooling system, therefore, extracting heat from outdoors which is then brought through the indoor coil in the AIR HANDLER and distributed to the building through ductwork. Additional ELECTRIC HEAT STRIPS are added to the AIR HANDLER to help heat the building if the outdoor temperature is extremely low.

HOT SURFACE IGNITOR:
This is a ceramic/carbon element which glows red and is used to ignite the gas and air mixture coming out of the burners in a gas furnace. This device replaces the old "PILOT", which had to continually be burning gas to operate. This is much more efficient!

INDOOR AIR BLOWER:
A motor driven wheel used to circulate or move air through a duct system.

INDUCER BLOWER:
A motor driven small wheel used to move air and gases through a heat exchanger.

LIMIT SWITCH:
The safety control used in a gas, oil furnace or an air handler to limit the "HIGH" temperature.

LINE SET:
The copper tubing connecting the EVAPORATOR COIL to the CONDENSER. It's also called the refrigerant lines.

PRESSURE SWITCH:
A switch usually used within a gas or oil furnace, which "senses" low combustion or improper drafting of the flue gases and will shut the furnace down on safety.

PRINTED CIRCUIT BOARD:
An electronic control which sends signals to all operations of a furnace, air handler, oil burner or air conditioning condenser.

SEER:
Seasonal Energy Efficiency Rating. The higher the rating, the more efficient the system.

SET BACK THERMOSTAT:
Also called an ELECTRONIC THERMOSTAT: A device used to monitor and adjust the building temperature and has set points which can be "PROGRAMMED" by the building owner to lower or raise the building temperature at given times. This is a great energy saver.

THERMOCOUPLE:
A small tube filled with a material which generates a small amount of electricity and acts as a safety control within a gas furnace. This device is placed in the path of a burning pilot flame to sense that there is actually a pilot burning before the gas valve will allow gas to be sent to the burners.

THERMOSTAT:
An electronic device used to regulate a control through the measurement of temperature.

Ton:
A unit of measurement used for determining cooling capacity. One ton is the equivalent of 12,000 BTUs per hour.

Zoning:
A method of dividing a home into different comfort zones, so each zone can be independently controlled depending on use and need.

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Call Us Today At (512) 258-3222

All Star Heating & Air Conditioning Inc.
12307 Roxie Dr
Austin, TX 78729
Phone: (512) 258-3222

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