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