A shop suggests saving money by plumbing a compressor salvaged from a scrapped refrigerator to a recovery cylinder, and using that arrangement to pull charges out of small appliances. What is wrong with the idea?
- AThe salvaged compressor is too small to reach the level small appliances require
Capability is not the issue. Even a rig that reached the required level every time would still be uncertified equipment.
- BThe arrangement is acceptable if the shop records the level it can actually reach
Self documentation cannot substitute for certification by an approved testing organization, which is what the rule specifically calls for.
- CThe arrangement is acceptable only where the refrigerant goes to a reclaimer
The destination of the refrigerant has no bearing on the equipment requirement, which attaches to the act of recovering it.
- A shop built rig is not certified equipment, and certified equipment is required
Why D is correct
The requirement is for certified recovery equipment, and certification is granted by an approved testing organization to a manufactured design. A shop assembled arrangement has no certification and cannot obtain one, so it may not be used to recover refrigerant regardless of how quickly it empties an appliance or how carefully the shop documents its behaviour.
What this question is testing
This item tests whether you treat the certified equipment requirement as absolute rather than as a performance target a shop may meet by its own means. It also checks that you recognise the safety features a certified machine carries that an improvised one lacks.
On the job
Improvised recovery rigs still turn up, usually in small shops and at scrap operations where somebody with mechanical skill sees a certified machine's price tag and a pile of working compressors. Beyond the regulatory problem, these rigs routinely overfill cylinders because there is no scale interlock and nothing measuring what has gone in, and they push oil into the cylinder because there is no separator. A basic certified small appliance recovery machine is inexpensive next to the consequences of being found using one of these.
Memory technique
You cannot certify your own homework.
Exam tip
Certified equipment means equipment a testing organization certified. Nothing a shop builds, however well it works, can satisfy that requirement.
Where to look it up
Recovery must be performed with equipment certified by an EPA approved testing organization.