Why should the technician watch for signs of contamination in the oil when recovering refrigerant from a system that experienced a compressor burn out?

Why should the technician watch for signs of contamination in the oil when recovering refrigerant from a system that experienced a compressor burn out?

The technician should watch for signs of oil contamination when recovering refrigerant from a system that experienced a compressor burn-out as the system will have to be flushed if contaminants are present.

When recovering refrigerant from a small appliance with a working compressor you must recover the refrigerant to a vacuum of?

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.

What should I take mission do if the refrigerant in a recovery cylinder is suspected to be contaminated?

If the recovery cylinder is suspected of being contaminated, a pressure reading of it should be taken and compared to a pressure temperature chart. Recovery cylinders are used for refilling. There are two ports, one liquid and one vapor in the recovery cylinders.

When using a system dependent recovery process on operating compressors technicians should?

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.

Which of the following recovery methods requires assistance from system components to recover refrigerant?

You must have the proper equipment for the type of refrigerant you’re recovering. For example, systems charged with R-410A operate under significantly higher pressures than R-22 systems. This means you need equipment made to handle the higher pressures associated with R-410A.

Which of the following refrigerants must be recovered with equipment currently regulated by the equipment certification requirements of the EPA under section 608?

Which of the following refrigerants must be recovered with equipment currently regulated by the equipment certification requirements of the EPA under section 608? Recovering 80% of the refrigerant whether or not the compressor is operating or achieving a 4 inch vacuum under conditions of ARI 740-1993.

What is recovery requirements for maximum of refrigerant for a system-dependent recovery?

On a system with an operating compressor, recovery equipment must be capable of recovering; 90% refrigerant or achieving 4 inches of vacuum. Small appliances in recreational vehicles may use refrigerants such as Ammonia, Hydrogen, and water.

What is the service procedure if the refrigerant in a recovery?

If the recovery cylinder is suspected of being contaminated, a pressure reading of it should be taken and compared to a pressure temperature chart. Recovery cylinders are used for refilling.

What is the service procedure if the refrigerant in a recovery cylinder?

What is the service procedure if the refrigerant in a recovery cylinder suspected to be contaminated? If the refrigerant in a recovery cylinder is suspected to be contaminated, a pressure reading of the cylinder should be taken and compared to a pressure/temperature chart.

What is system dependent recovery?

System-dependent (passive) recovery is the recovery of refrigerant from a system employing the refrigeration system’s internal pressure and/or compressor to aid the recovery process. System-dependent equipment cannot be used with appliances containing more than 15 pounds of refrigerant.

What is recovery requirements for maximum of refrigerant for a system dependent recovery?

When to recover 80% of the refrigerant?

Recovering 80% of the refrigerant when the compressor is operating. c. Recovering 95% of the refrigerant when the compressor is operating or achieving a 10-inch vacuum under the conditions of AHRI 740. d. Recovering 75% of the refrigerant when the compressor is operating.

What does a compressor burn out smell like?

A compressor burnout has occurred. It is the characteristic smell of the refrigerant. The refrigerant should be vented.

When to use a self contained recovery machine?

When installing any type of access fitting onto a sealed system; the fitting should be leak tested before proceeding with recovery. Any person who opens an appliance for maintenance service or repair must have at least one self-contained recovery machine available at their place of business.

Why are recovery cylinders allowed to stabilize to room temperature?

They are used to connect the recovery device to an appliance and must be discarded after each use. d. They eliminate oil loss during recovery. Why should a recovery cylinder be allowed to stabilize to room temperature when checking for non condensables inside a recovery cylinder known to contain only one refrigerant.