When a system is in deep vacuum;
Never energize the compressor.
Applying heat, with a heat gun, to the compressor;
can help vaporize any trapped liquid refrigerant during recovery.
Recovery equipment must be;
Certified by an EPA-approved testing laboratory.
A small appliance is defined by EPA as;
Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs or less of refrigerant.
When pressurizing a system with nitrogen you should;
charge through a pressure regulator.
&
install a relief valve in the line downstream from the pressure regulator.
Which of the following is an example of a non-condensable?
Air
On a system with an operating compressor, recovery equipment must be capable of recovering;
90% refrigerant or achieving 4 inches of vacuum.
Self-contained or active recovery equipment;
Has its own means to recover refrigerant.
Recovering multiple types of refrigerants in the same cylinder;
will make the reclaimed refrigerants unreclaimable.
If a strong odor is detected while performing a refrigerant recovery process,
A compressor burnout has likely occurred.
Type I Certification is required for;
persons handling refrigerant during maintenance, service, or repair of small appliances.
Which HC refrigerant is allowed for use in NEW Domestic Small Appliances?
R-600a
With a non-operating system compressor, recovery equipment must be capable of recovering;
80 percent of the refrigerant or achieving 4 inches of vacuum.
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.
System-dependent recovery methods may only be used on appliances containing;
15 pounds of refrigerant or less.
Which of the following is true regarding refrigerant leaks on small appliances?
EPA does not require repair, but leaks should be repaired whenever possible.
When filling a charging cylinder with a regulated refrigerant;
The refrigerant vapor that is vented off the top of the cylinder must be recovered.
Small appliances in recreational vehicles may use refrigerants such as Ammonia, Hydrogen, and water. These refrigerants;
Should not be recovered.
If regulations change after the technician becomes certified;
The technician is responsible for complying with any changes to the regulations.
Small appliances are equipped with a straight piece of tubing (process stub) that is used;
As the installation location for a piercing-type access valve.
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.
System-dependent or passive recovery equipment;
Captures refrigerant into a non-pressurized container.
After the refrigerant has been recovered, which of the following can be used to flush the system?
Nitrogen
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.
Technicians who perform sealed-system service on small appliances must have;
Type I or Universal certification.