What type of refrigerant is used in a recovery/recycling machine?
D. R-717 D Your recovery/recycling machine has R-22 refrigerant in it. You now have to recover refrigerant from an R-410A unit. What must be done before recovery?
What to do in the event of a large release of refrigerant?
In the event of a large release of CFC, HCFC, or HFC refrigerant in a contained area, which of the following is true? A. Safety goggles and lined butyl gloves are sufficient.
What should be done with refrigerant that cannot be reclaimed?
A. Vent the refrigerant since it cannot be reclaimed. B. Recycle the refrigerant. C. Recover the mixture in a separate recovery tank. D. Recover and use in another system. C For an appliance that uses a CFC, HCFC, or HFC refrigerant, which of the following violates the prohibition on venting?
What is the best practice to break the vacuum when dehydrating?
Gravity Created by Booboo312346 Terms in this set (23) It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method. However, it Requires a pressure regulator Approved refrigerant recovery cylinders can be identified by which color code Yellow tops and grey bodies
How would you remove moisture from refrigerant in a system?
Moisture can be removed from a refrigeration system by applying a vacuum.
Which refrigeration component removes moisture from the conditioned space?
The condenser This component is supplied with high-temperature high-pressure, vaporized refrigerant coming off the compressor.
How does moisture affect refrigeration system?
Moisture refers to water in any form (solid, liquid or gas). When moisture is introduced in the system, it may combine with the system refrigerant to form an acidic solution which can erode internal compressor components.
Why is evacuating a refrigeration system important quizlet?
The purpose of evacuating a refrigeration system is to: Remove non-condensable gases and moisture.
Which unit contains a desiccant to remove moisture from the system?
DRIER - A device containing a desiccant placed in series, usually in the liquid line, to absorb and hold excess moisture. Usually called receiver-drier. EVACUATE - To create a vacuum to remove air and moisture in the system.
How is heat removed from the vapor refrigerant in the condenser?
Condenser: The condenser removes heat given off during the liquefication of vaporized refrigerant. Heat is given off as the temperature drops to condensation temperature. Then, more heat (specifically the latent heat of condensation) is released as the refrigerant liquefies.
Which method of evacuation is most effective at removing moisture from a system?
If the system indicates moisture, a multiple evacuation with a nitrogen sweep will significantly reduce the amount of moisture in the system. To perform this procedure, reduce the system pressure to between 1,000 and 2,500 microns.
What causes moisture in a refrigerant?
There are five main causes of moisture in the system: System cleaning and vacuum performed inadequately or insufficiently; Installation of an already contaminated compressor with moisture (used), even if the vacuum was performed properly; Reusing the filter drier.
Why is evacuating a refrigerant system important?
Whenever a refrigeration system is opened for service, proper evacuation is necessary before it can be safely resealed. It is critical that non-condensables and other contaminates be removed from the system.
Why is a large vacuum pump required to remove moisture from a system that has been flooded with water?
A vacuum pump removes air and moisture from the system before the system is damaged. The deeper and more complete the vacuum, the more moisture is removed, and the likelihood of system complications caused by unwanted water or other contaminants is reduced.
What is meant by evacuating the system?
Evacuation — The removal of water vapor and air from the system.