A packaged rooftop unit was fully assembled and charged at the factory, and the nameplate lists a twelve pound charge of R-410A. Which certification applies when a technician opens that sealed refrigerant circuit?
Correct Answer
C) Type II, because the charge sits above the ceiling that defines a small appliance
The factory did seal this appliance, so it satisfies the manufacturing conditions in the small appliance definition. What it fails is the charge limit, since a small appliance may hold no more than five pounds of refrigerant. Twelve pounds is well past that ceiling, so the unit is an ordinary high-pressure appliance and Type II certification is required. This is the mirror image of the mini-split case: there the manufacturing test failed and the charge was small, while here the manufacturing test passes and the charge is too large.
Why This Is the Correct Answer
Small appliance status requires both the factory manufacturing conditions and a charge at or below five pounds. This unit meets the first and fails the second, and failing any single condition puts the appliance in the general high-pressure class covered by Type II.
Why the Other Options Are Wrong
Option A: Type I, because the unit was charged and sealed before it left the plant
The factory seal is only half the definition. A twelve pound charge is more than twice the limit, so the unit cannot be a small appliance regardless of how it was built.
Option B: Type III, because packaged rooftop equipment is handled under the low-pressure rules
R-410A boils far below room temperature and drives the highest operating pressures in common comfort cooling equipment. Nothing about it is low pressure.
Option D: No type certification, because the circuit was never opened during installation
Certification is required to open the circuit at all. Whether the installer opened it has no bearing on what the service technician needs.
Memory Technique
Five pounds is the ceiling and the factory is the floor. You have to clear both to be Type I.
Reference Hint
40 CFR 82.152: small appliance is limited to 5 lbs or less of refrigerant in addition to the factory manufacture, charge and seal requirements.
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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