What is the current standard for recovery only equipment?
SAE standard J2209 specifies the requirements of equipment used for R-12 recovery-only. SAE standard J2810 states the requirements for equipment used for R-134a recovery only.
When did recovery equipment used during maintenance service or repair of small appliances need to be certified?
(1) Recovery and/or recycling equipment manufactured or imported on or after November 15, 1993, and before September 22, 2003, intended for use during the maintenance, service, repair, or disposal of appliances (except small appliances, MVACs, and MVAC-like appliances) must be certified by an approved equipment testing …
What should be done after reaching the required recovery vacuum on an appliance?
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!
When should you replace the recycling equipment filter?
RTI/Mahle Filters need to be replaced every 25 hours of use in order to properly remove acids and moisture that can damage compressors and contaminate oil in the vehicle.
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 steps should be taken before using a recovery unit to remove a charge?
Question #8: What steps should be taken before using a recovery unit to remove a charge? Acid testing the refrigerant. Purging the recovery unit with nitrogen. Changing the oil in the recovery unit.
When using recovery equipment manufactured before November 15 1993 you must evacuate a low-pressure chiller to what level before making a major repair?
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.
Why could a recycling or recovery machine that uses a hermetic compressor overheat?
Both recycling and recovery equipment using hermetic compressors have the potential to overheat when drawing a deep vacuum because the unit relies on the flow of refrigerant through the compressor for cooling.
Which refrigerant s must be recovered before opening or disposing of appliances?
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in common? They must be recovered before opening or disposing of appliances. After 1995, supplies of CFC refrigerant for equipment servicing will come from; recovery and recycling.
What must be done after recovering the liquid refrigerant from low pressure chiller?
1) Leak test and repair the chiller. 2) Seal the purge-unit discharge. 3) Plumb the purge-unit discharge back into the low side. 4) Plumb the purge-unit into the recovery unit.
What is the primary water source for a recovery unit?
Correct answer is C: the local municipal water supply. The primary water source for a recovery unit condensing coil is the local municipal water supply.
Which of the following components is located after the evaporator?
25 Cards in this Set
|Which of the following should be replaced if a system is opened for servicing?||Filter drier|
|Which of the following components is located after the evaporator?||Accumulator|
|What will non-condensables in a refrigeration system result in?||Higher discharge pressure|
How do I clean my recovery machine?
Proper Maintenance of a Recovery Unit
- Keep the unit clean by wiping it down with a damp cloth to remove dirt, oils, etc., prior to storage for the day. …
- Clean inlet particle filter regularly. …
- Ensure that the inlet and discharge ports are protected and kept clean by replacing the plastic caps after every use.
What should you do prior to introducing recovered refrigerant to a motor vehicle?
Before you begin transferring recycled refrigerant into an empty storage cylinder, in order to remove non- condensable gases, the cylinder must be evacuated to at least 27 in. HG of vacuum. Refillable cylinders must be UL or DOT approved and must be hydrostatically tested and date stamped every five years.