HVAC - EPA Certification Q&A
Clean Air act - 608
EPA - Environmental Protection Agency - =to minimize the quantity of refrigerants released to
the atmosphere, and to maximize the recovery and recycling of refrigerants during the servicing
and disposal of mobile and stationary air conditioning and refrigeration equipment.
ozone - =a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a
high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth
from the sun.
chlorine - =the chemical element of atomic number 17, a toxic, irritant, pale green gas.
freon - =a gas at room temperature and a liquid when cooled or compressed. Freon gas is
colorless, non-flammable and relatively odorless. Some Freon gases have an ether-like odor.
Four categories of certification - =1. Type I - small appliances
2. Type II - high pressure appliances
3. Type III - low pressure appliances
4. Universal - both low & high pressure and small appliances
refrigeration - =movement of heat from an area where it is not wanted to an area where it is less
objectionable
vapor/compression refrigeration cycle - =may be defined as lowering the temperature of an
enclosed space by removing heat from that space and transferring it elsewhere. A device that
performs this function may also be called an air conditioner, refrigerator, air source heat pump,
geothermal heat pump or chiller (heat pump).
gauge manifold set - =allows the HVAC technician to check central air conditioning unit
operating pressures, transfer Ac refrigerant, pressure test system, purge the system with nitrogen,
and perform other necessary tasks.
, pressure/vacuum - =pressure as defines as the force per unit area, most often described as pounds
per square inch (U.S.)
Two types:
A - absolute
G - gauge
atmospheric pressure - =14.7 lbs. per square inch at sea level, less at higher altitudes
mercury barometer - =- used to measure atmospheric pressure
- atmospheric pressure will support a column of mercury 29.92 inches in a sealed tube
gauge pressure - =atmospheric pressure shown as zero PSI or PSIG
(pounds per square inch gauge)
compound gauges - =measure pressure both above and below 0 psig
absolute pressure - =PSIA
- 0 psia cannot be reduced further
CFCs
Chloro-fluoro-carbon - =Chlorofluorocarbon (CFC) is an organic compound that contains
carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane
R-11, 12, 500
HCFCs
hydro-chloro-fluoro-carbon
Clean Air act - 608
EPA - Environmental Protection Agency - =to minimize the quantity of refrigerants released to
the atmosphere, and to maximize the recovery and recycling of refrigerants during the servicing
and disposal of mobile and stationary air conditioning and refrigeration equipment.
ozone - =a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a
high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth
from the sun.
chlorine - =the chemical element of atomic number 17, a toxic, irritant, pale green gas.
freon - =a gas at room temperature and a liquid when cooled or compressed. Freon gas is
colorless, non-flammable and relatively odorless. Some Freon gases have an ether-like odor.
Four categories of certification - =1. Type I - small appliances
2. Type II - high pressure appliances
3. Type III - low pressure appliances
4. Universal - both low & high pressure and small appliances
refrigeration - =movement of heat from an area where it is not wanted to an area where it is less
objectionable
vapor/compression refrigeration cycle - =may be defined as lowering the temperature of an
enclosed space by removing heat from that space and transferring it elsewhere. A device that
performs this function may also be called an air conditioner, refrigerator, air source heat pump,
geothermal heat pump or chiller (heat pump).
gauge manifold set - =allows the HVAC technician to check central air conditioning unit
operating pressures, transfer Ac refrigerant, pressure test system, purge the system with nitrogen,
and perform other necessary tasks.
, pressure/vacuum - =pressure as defines as the force per unit area, most often described as pounds
per square inch (U.S.)
Two types:
A - absolute
G - gauge
atmospheric pressure - =14.7 lbs. per square inch at sea level, less at higher altitudes
mercury barometer - =- used to measure atmospheric pressure
- atmospheric pressure will support a column of mercury 29.92 inches in a sealed tube
gauge pressure - =atmospheric pressure shown as zero PSI or PSIG
(pounds per square inch gauge)
compound gauges - =measure pressure both above and below 0 psig
absolute pressure - =PSIA
- 0 psia cannot be reduced further
CFCs
Chloro-fluoro-carbon - =Chlorofluorocarbon (CFC) is an organic compound that contains
carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane
R-11, 12, 500
HCFCs
hydro-chloro-fluoro-carbon
