EPA Type 1
What is the maximum normal charge of HCFC or HFC refrigerant in an appliance that is allowed to use system dependent recovery equipment?
15 lbs
System-dependent recovery methods may only be used on appliances containing;
15lbs of refrigerant or less.
What is the maximum allowable factory charge of refrigerant for Type 1 appliances using CFCs, HCFCs, or HFCs?
5 lbs
What is the maximum allowable factory charge of refrigerant for Type 1 appliances?
5 lbs
With a non-operating system compressor, recovery equipment must be capable of recovering;
80 percent of refrigerant or achieving 4 inches of vacuum.
On a system with an operating compressor, recovery equipment must be capable of recovering;
90% refrigerant or achieving 4 inches of vacuum.
If a strong odor is detected while performing a refrigerant recovery process,
A compressor burnout has likely occurred.
For which of the following refrigeration systems/appliances would it be permissible to use a passive recovery device for recovery of CFCs, HCFCs, and HFCs?
A domestic refrigerator.
All appliances must be equipped with a service aperture or process stub which is used when adding or removing refrigerant from the appliance. What is typically used on small appliances?
A straight piece of tubing that is entered using a piercing access valve.
Which of the following is an example of a non-condensable?
Air
A small appliance is defined by EPA as;
Appliances manufactured, charged and hermetically sealed in a factory that contains 5 lbs. or less of refrigerant.
Small Appliances are equipped with a straight piece of tubing (process stub)
As the installation location for a piercing-type access valve.
Applying heat, with a heat gun, to the compressor;
Can help vaporize any trapped liquid refrigerant during recovery.
A passive system-dependent recovery process for small appliances
Capture refrigerant in a non-pressurized container.
System-dependent or passive recovery equipment;
Captures refrigerant into a non-pressurized container.
Recovery equipment must be;
Certified by an EPA-approved testing laboratory.
When pressurizing a system with nitrogen you should;
Charge through a pressure regulator and install a relief valve in the line downstream from the pressure regulator.
Which of the following is true regarding refrigerant leaks on small appliances?
EPA does not require repair, but leaks should be repaired whenever possible.
Self-contained or active recovery equipment;
Has its own means to recover refrigerant.
Which hydrocarbon refrigerant is approved for retrofit into existing household refrigerators?
Hydrocarbons are not approved for retrofit applications.
If the EPA regulations should change after a technicians becomes certified:
Its the technicians responsibility to comply with any future changes in the law.
When a system is in deep vacuum;
Never energize the compressor.
After the refrigerant has been recovered, which of the following can be used to flush the system?
Nitrogen
Recovery equipment used for the service or repair of small appliances must be certified by an EPA-approved laboratory if the recovery equipment was manufactured after:
November 15 1993
Whenever nitrogen is used to pressurize or blow debris out of the system:
Only nitrogen vapor should be used.
At high temperatures, (i.e., open flames, glowing metal surfaces, etc.) R-12 and R-22 can decompose to form:
Phosgene gas.
When using a system-dependent recovery system on an appliance that has a non-operating compressor, the technician should;
Place access fitting on both the low and high side of the system.
Which of the following are included in EPA's definition of a "small appliance"?
Products manufactured, fully charged and hermetically sealed in a factory
Which of the following refrigerants is most commonly used as a replacement for R-12 in new household refrigerators?
R-134a
Which HC refrigerant is allowed for use in NEW Domestic Small Appliances?
R-600a
Which of the following is an approved refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers?
R-600a
Recovery devices that were manufactured after November 15, 1993 and are used for recovery of refrigerant from small appliances must be capable of:
Recovering 90% of the refrigerant when the compressor is operating or achieving a 4 inch vacuum under the conditions of ARI 740-1993
If, after installing a fitting for the purpose of recovering the appliance's refrigerant, you find that the system pressure is 0 psig;
Refrigerant recovery is not required.
Which refrigerant can be mixed in an appliance?
Refrigerants cannot be mixed.
If a reclamation facility receives a tank of mixed refrigerant, they may:
Refuse to accept the refrigerant or charge extra for processing it.
When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should;
Run the compressor and recover from the high side of the system only.
Small appliances in recreational vehicles may use refrigerants such as Ammonia, Hydrogen, and water. These refrigerants;
Should not be recovered.
Why is it important to obtain an accurate pressure reading of refrigerant inside a recovery cylinder?
The pressure reading along with a temperature reading can indicate if there is excessive air or other non-condensables in the cylinder.
When filling a charging cylinder with a regulated refrigerant;
The refrigerant vapor that is vented off the top of the cylinder must be recovered.
If regulations change after the technicians becomes certified;
The technicians is responsible for complying with any changes to the regulations.
Solderless piercing valves should not remain installed on refrigeration systems after completion of repairs because:
They tend to leak over time.
Why should low and high sides access valves be installed when recovering refrigerant from a household refrigerator?
To improve speed of recovery.
What may be done to speed the recovery process and ensure that all CFC, HCFC, or HFC refrigerant has been removed from a frost-free refrigerator?
Turn on the defrost heater to increase the refrigerant's temperature and vaporize any liquid.
How many access valves are needed to recover the refrigerant on a sealed system with an operating compressor that has a completely restricted capillary tube?
Two valves, one on the high and one on the low side of the system.
Technicians who perform sealed-system service on small appliances must have;
Type 1 or Universal certification.
When is it essential to take measures to help release trapped CFC, HCFC, or HFC refrigerant from the compressor oil during refrigerant recovery?
When using passive recovery devices on small appliances with non-operating compressors.
Recovering multiple types of refrigerants in the same cylinder;
Will make the reclaimed refrigerants unreclaimable.
When using a self-contained recovery device on a CFC, HCFC, or HFC system with an operating compressor, technicians must:
either recover the refrigerant to 4 inches of mercury vacuum or 90% of the nameplate charge.
Type 1 certification is required for;
persons handling refrigerant during maintenance, service, or repair of small appliances.
When installing any type of access fitting onto a sealed system:
the fitting should be leak tested before proceeding with recovery.
