A technician certified in Core and Type II arrives to find that the failed machine is a centrifugal chiller charged with R-123, a refrigerant that boils above normal room temperature. What may that technician do on the machine?
Correct Answer
C) Nothing that opens the refrigerant circuit, because that machine requires Type III certification
R-123 boils above normal room temperature, which makes the chiller a low-pressure appliance, and low-pressure appliances are the Type III category. Type II certification does not reach them. The technician can check electrical, controls, water flow, and anything else outside the refrigerant circuit, but may not open that circuit or recover the charge. Urgency does not create an exception, and promising to send the refrigerant out for reclamation afterward does not change who is permitted to remove it in the first place.
Why This Is the Correct Answer
Certification is tied to the appliance class, and this machine's refrigerant places it in the low-pressure class. A Type II holder may work on high-pressure and very high-pressure appliances only, so opening the R-123 circuit is out of bounds until the right certification is on site.
Why the Other Options Are Wrong
Option A: Recover the charge, since recovery is permitted under any type certification that is held
Recovery is not a universal privilege. Each type certification authorizes work on its own equipment class, and low-pressure recovery uses different equipment and technique than Type II work does.
Option B: Open the machine, because an emergency service call suspends the certification requirement for that visit
Nothing in the rules suspends a certification requirement during an emergency. Downtime pressure is exactly when shortcuts get taken, which is why no exception exists even for a single visit.
Option D: Perform the repair as long as the recovered refrigerant is sent to a certified reclaimer afterward
Reclamation governs what happens to refrigerant after it comes out of the machine. Sending it to a reclaimer says nothing about who is authorized to open the circuit in the first place.
Memory Technique
The card follows the machine, not the emergency. Wrong class, hands off the circuit.
Reference Hint
40 CFR 82.161: Type III is required for low-pressure appliances. R-123 boils above room temperature, per the class definitions in 40 CFR 82.152.
More epa-608-type-2 Questions
A walk-in cooler condensing unit holds a full charge of twenty-five pounds of R-404A, which is below the fifty pound threshold that brings an appliance under the leak repair provisions. What still applies to this unit?
An office building has thirty water source heat pumps on a common water loop, and each one left the factory assembled, hermetically sealed and charged with four pounds of R-410A. How is one of those units classified?
A data sheet for an unfamiliar refrigerant lists a boiling point of about fifty-five degrees Fahrenheit at atmospheric pressure. What does that tell a technician holding Core and Type II certification?
A technician holds Core, Type I and Type III certification and is sent to recover the charge from a twenty ton rooftop unit charged with R-410A. What does that combination of sections allow on this job?
A fleet garage technician holds only the vehicle air conditioning certification issued under Section 609 and is asked to recover the charge from the shop's own rooftop air conditioner. What does that credential allow?
A split system's outdoor unit, indoor coil and the line set the installer ran and brazed between them are being considered. For the purposes of the refrigerant rules, what makes up the appliance here?
On a new installation the line set is brazed to a factory charged outdoor unit and an indoor coil shipped under a nitrogen holding charge, with the outdoor unit's service valves still closed. What does the recovery requirement call for before that brazing?
A rooftop unit's data plate has weathered until the charge figure cannot be read, and the technician needs the full charge to place the appliance under the evacuation and leak provisions. Where should that figure come from?
A computer room air conditioning unit holds forty pounds of R-407C and connects to a remote air cooled condenser through refrigerant piping run and brazed by the installer. How is that unit classified?
A shop's office manager, who holds no technician certification, is sent to a supply house to pick up a new recovery machine for the commercial crew. What does the sales restriction require at that counter?
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Previous Question
Type III certification exists as a class of its own, separate from the equipment that Type II covers. What is it about a low-pressure appliance that puts it in that separate class?
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A technician arrives at a system that still holds part of its refrigerant charge and finds that nitrogen was added on top of it during an earlier visit. What is the concern about connecting the recovery machine and starting?