A very large refrigerant leak can cause suffocation because refrigerants

Safety Procedure. A very large leak can cause suffocation because refrigerants are heavier than air and displace oxygen. This cuts off oxygen supply at ground level and causes suffocation.

1. What acids can CFC and HCFC refrigerants decompose into at high temperatures eg open flames glowing metal surfaces etc )?
2. Which recovery equipment maintenance practices should be performed on a regular basis?
3. What is the maximum normal charge of HCFC or HFC refrigerant in an appliance that is allowed to use system dependent recovery equipment?
4. Which of the following are included in EPA's definition of a small appliance?
5. What temp does refrigerant decompose?
6. What should systems that use r407c be leak checked with?
7. What is the service procedure if the refrigerant in a recovery cylinder?
8. What should a technician do if the refrigerant in a recovery cylinder is contaminated?
9. When can appliances containing refrigerants be recovered?
10. What is the maximum amount of refrigerant that can be recovered with a system dependent recovery?
11. When refrigerants are exposed to glowing metal surfaces or flames?
12. Why should oxygen or compressed air not be used to pressurize appliances to check for leaks?
13. What refrigerants damage the stratospheric ozone?
14. Which of the following repairs would always be considered major under EPA's regulations?
15. What refrigerant is being used in small appliances in place of R 12?

What acids can CFC and HCFC refrigerants decompose into at high temperatures eg open flames glowing metal surfaces etc )?

What acids can CFC and HCFC refrigerants decompose into at high temperatures (e.g. open flames, glowing metal surfaces, etc.)? hydrochloric and hydrofluric acids. When is it essential to take measures to help release trapped CFC, HCFC, or HFC refrigerants from the compressor oil during refrigerant recovery?

Which recovery equipment maintenance practices should be performed on a regular basis?

According to the EPA, which recovery equipment maintenance practice(s) should be performed on a regular basis? Check recovery device for refrigerant leaks.

What is the maximum normal charge of HCFC or HFC refrigerant in an appliance that is allowed to use system dependent recovery equipment?

System-dependent or passive recovery equipment use for an appliance containing HCFCs or HFCs is limited to a maximum charge of 15 pounds.

Which of the following are included in EPA's definition of a small appliance?

A small appliance is defined by EPA as; Appliances manufactured, charged and hermetically sealed in a factory that contains 5 lbs. or less of refrigerant. Applying heat, with a heat gun, to the compressor; ... Technicians who perform sealed-system service on small appliances must have; Type 1 or Universal certification.

What temp does refrigerant decompose?

All Answers (22) Thermal degradation of Freon 22 begin around 500 °K as is illustrated in the linked file and the products depend on the temperature and presence of oxygen.

What should systems that use r407c be leak checked with?

What should systems that use R-407C be leak checked with? Pressurized nitrogen and a trace amount of R-407C. You just studied 25 terms!

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

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 should a technician do if the refrigerant in a recovery cylinder is contaminated?

What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated? Turn refrigerant in for reclamation.

When can appliances containing refrigerants be recovered?

EPA regulations require that all comfort cooling appliances (air conditioners) containing more than 50 lbs. of refrigerant MUST be repaired when the annual leak rate exceeds 15%. EPA regulations require that all Commercial and Industrial Process Refrigeration containing more than 50 lbs.

What is the maximum amount of refrigerant that can be recovered with a system dependent recovery?

System dependent recovery is limited to appliances with 15 pounds or less of refrigerant. Using this method for appliances having more than 15 pounds is not feasible and is prohibited.

When refrigerants are exposed to glowing metal surfaces or flames?

#8. If R-12 or R-22 are exposed to high temperatures from open flames, glowing hot metal surfaces etc, these refrigerants can decompose to form. hydrochloric and hydrofluoric acids. hydrochloric and hydrofluoric acids.

Why should oxygen or compressed air not be used to pressurize appliances to check for leaks?

Why should oxygen or compressed air NOT be used to pressurize appliances to check for leaks? Oxygen or compressed air can explode when mixed with compressor oil or some refrigerants.

What refrigerants damage the stratospheric ozone?

Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun.

Which of the following repairs would always be considered major under EPA's regulations?

the system water pumps, the recovery compressor, and the recovery condenser water should all be on. Which of the following repairs would ALWAYS be considered "major" under EPA's regulations? Replacement of an evaporator coil.

What refrigerant is being used in small appliances in place of R 12?

According to Environmental Protection Agency regulations, any product using or recycling a blend requires a separate machine for each component. Currently, R-134A is the only approved alternative refrigerant to retrofit R-12 air conditioning systems in vehicles, which is also its most common use.