Epa 608 stuvia - Study guides, Class notes & Summaries

A typical setting for the high pressure cut-out control on a recovery unit used for evacuating the refrigerant from a low pressure chiller is: - ANSWER C) 10 psig. A charged low pressure refrigeration system can be efficiently leak checked by: - ANSWER D) raising system pressure by heating with circulated hot water or heating blankets. The existence of air in a low pressure system, causes __________. - ANSWER C) high head pressure. Which safety precaution should be adhered to for low pr...

Before recovering refrigerant from a chiller suspected of having tube leaks,... - ANSWER ...drain the water sides of the evaporator and condenser. Draining the water sides helps to avoid the introduction of additional water into the system cause by the evacuation process and to prevent the water from freezing as the refrigerant evaporates during recovery. How can you pressurize a low-pressure chiller to make a non-major repair? - ANSWER Warm up the system. Under EPA regulations, you may wa...

What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? - Answer November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? - Answer Recover all refrigerants. The objective of the Clean Air Act is to protect what? - Answer The earth's stratosphere. HFC's - Answer HydroFlouroCarbon's CFC's - Answer ChloroFluoroCarbon's ODP - Answer Ozone Depletion Potential Which international treaty agreement was...

Technicians maintaining, servicing, repairing or disposing of low-pressure appliances must be certified as - ANSWER Type III Technician or a Universal Technician. As of November 14, 1994, the sale of CFC and HCFC refrigerants is restricted to - ANSWER Certified technicians, NOTE: If EPA regulations change after the technician is certified, it will be the technician's responsibility to comply with any future changes. Because a low-pressure system operates below atmospheric pressure (in a v...

The maximum test pressure for leak testing a low-pressure centrifugal chiller is - ANSWER 10 psig Excessive operation of a purge system means - ANSWER The system has a leak on the sub-ambient pressure side of the system For a commercial refrigeration system with a charge of 50 pounds or more refrigerant, a substantial (or threshold) week rate will be reduced to ________ after January 1, 2019. - ANSWER 20% For a comfort cooling system with a charge of 50 pounds or more of refrigerant, a ...

Technicians maintaining, servicing, repairing or disposing of low-pressure appliances must be certified as - ANSWER Type III Technician or a Universal Technician. As of November 14, 1994, the sale of CFC and HCFC refrigerants is restricted to - ANSWER Certified technicians, NOTE: If EPA regulations change after the technician is certified, it will be the technician's responsibility to comply with any future changes. Because a low-pressure system operates below atmospheric pressure (in a v...

Techs maintaining, servicing, repairing, or disposing of low pressure appliances must be certified as? - ANSWER Type III or universal technician As of what date was the sale of CFCs and HCFCs restricted to certified techs? - ANSWER Nov 14, 1994 Who is responsible to comply with changes in section 608? - ANSWER The technician Because low pressure systems operate in a vacuum , where will leaks occur? - ANSWER Gaskets or fittings (allow air or moisture into the system? What is the most ...

The state of the refrigerant entering the metering device is: - ANSWER High pressure liquid The following components are metering devices: - ANSWER Evaporator pressure regulator, Thermostatic expansion valve The state of the refrigerant entering the compressor is: - ANSWER Low pressure vapor Before the recovery process can be initiated, a technician must know: - ANSWER The type of refrigerant in the system Checking the pressure of a recovery cylinder at a known temperature can determ...

A-1 - ANSWER refrigerants CFC-12, HCFC-22, HFC-134a are all classified as type what substances? 15 hg - ANSWER when recovering refrigerant from a medium pressure system with more than 200lbs of refrigerant, recover to a level of? 30% - ANSWER EPA requires that all industrial process refrigeration systems containing more than 50 lbs of refrigerant MUST be repaired when the annual leak rate excceds? pressurize system using controlled hot water - ANSWER whats the most efficient method of l...

what is the primary water source for a recovery unit condensing coil? - ANSWER local municipal water supply approximately how much refrigerant vapor is left in an average 350 ton R-11 chiller at 0 psig pressure once all the R-11 liquid has been removed? - ANSWER 100 lbs a rupture disc on a recovery vessel for low pressure refrigerant relieves at ____ - ANSWER 15 psig on a centrifugal system, the purge unit takes its suction from the ____ - ANSWER top of the condenser a centrifugal ch...