When using recovery and recycling technicians must evacuate low pressure appliances to the following level before disposing of the appliance?

should be evacuated to at least 0 psig before it is opened (if high- or very high-pressure appliance) or be pressurized to 0 psig before opening if it is a low-pressure appliance.

What evacuation level must technicians recover refrigerant to before disposing of a low-pressure appliance?

Before disposing of a low-pressure appliance, the refrigerant must be recovered or evacuated to 25 mm of Hg absolute.

When using recovery and recycling equipment technicians must evacuate an appliance containing 10 lbs of R 500 to the following level before disposing of the appliance?

When using recovery and recycling equipment manufactured BEFORE November 15, 1993, technicians must evacuate an appliance containing 10 pounds of CFC-500 to the following level before disposing of the appliance: 4 inches of Hg vacuum.

THIS IS IMPORTANT:  How are human activities responsible for ecological imbalance?

What level of evacuation must be obtained for small appliances?

For high- or very high-pressure appliances, the equipment must be evacuated to 0 psig before it is opened. For low-pressure appliances, the equipment must be pressurized to 0 psig before it is opened. Methods that require subsequent purging (e.g., nitrogen) cannot be used except with appliances containing R-113.

What is the minimum evacuation level that should be achieved before charging the system?

After making a major repair, the appliance should be dehydrated by evacuating the system to a minimum of 500 microns. This minimum level is required for HFC refrigerants with POE oil or any other refrigerant system.

What evacuation level must technicians recovery?

25 Cards in this Set

Where should the discharge from a rupture disc be piped for venting? Outdoors
What evacuation level must technicians recover refrigerant to before disposing a low-pressure appliance? 25 mm of Hg absolute

When using recovery or recycling equipment manufactured before November 15 1993 technicians must evacuate low-pressure appliances to the following L?

Using evacuation equipment manufactured on or after November 15, 1993; and • The compressor in the appliance is operating. should be evacuated to at least 0 psig before it is opened (if high- or very high-pressure appliance) or be pressurized to 0 psig before opening if it is a low-pressure appliance.

When using recovery equipment manufactured before November 15 1993 you must evacuate a low pressure chiller to what level before making a major repair?

When using recovery or recycling equipment manufactured BEFORE November 15, 1993, technicians must evacuate low-pressure appliances to the following level before making a major repair: 25 inches of Hg vacuum.

THIS IS IMPORTANT:  You asked: How does combustion recycle carbon in our atmosphere?

When can Appliances containing refrigerant be recovered to atmospheric pressure?

TYPE II

Question Answer
17. When can appliances containing refrigerants be recovered to atmospheric pressure, C. Leaks in the appliance make recovery to the prescribed level unattainable.
18. Which of the following repairs would always be consider”major” under EPA regulations, A. Replacement of an evaporator coil.

What should be done after reaching the required recovery vacuum on an appliance quizlet?

What should be done after reaching the required recovery vacuum on an appliance? Wait for at least a few minutes to see if the system pressure rises. You just studied 152 terms!

What are low pressure appliances?

Low-pressure appliance means an appliance that uses a refrigerant with a liquid phase saturation pressure below 45 psia at 104 °F. Examples include but are not limited to appliances using R-11, R-123, R-113, and R-245fa. … Examples include but are not limited to appliances using R-114, R-124, R-12, R-134a, and R-500.

When should an appliance not be evacuated?

The reference manual states “Appliances do not need to be evacuated all the way to the prescribed level if the appliance is being disposed of”.

Who must certify recovery equipment used during maintenance?

17 Cards in this Set

EPA regulations include which of the following in the definition of small appliances Both A and B
recovery equipment used during maintenance service or repair of small appliances must be certified by the EPA approved laboratory is manufactured after November 15th 1993