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?
Correct Answer
D) The whole refrigerant circuit including the field brazed line set between them
An appliance is the assembly that contains and uses the refrigerant, and refrigerant flows through every part of this circuit, including the tubing the installer brazed in the field. That is why a leak in the line set is a leak in the appliance, why the whole circuit has to be brought to its required level before any part is opened, and why a split system is not a factory sealed unit no matter how the two boxes arrived.
Why This Is the Correct Answer
The refrigerant circuit is what defines the appliance, and on a split system that circuit runs from the compressor through the line set to the indoor coil and back. The field brazed tubing carries refrigerant, so it is part of the appliance. A leak there counts against this appliance, and the entire circuit is placed on the evacuation table as one unit with one normal charge.
Why the Other Options Are Wrong
Option A: The outdoor unit alone, since that is where the compressor and charge live
The outdoor unit is one part of a circuit that also includes the line set and the indoor coil. Refrigerant is present in all of it during normal operation.
Option B: The outdoor unit and indoor coil, with the line set treated as building piping
Line set tubing carries refrigerant, unlike condensate drains or control wiring. It is part of the appliance, not part of the building.
Option C: Each factory built section separately, with its own charge and requirements
The sections are not separate appliances once they are joined into one circuit. They share a single charge that moves freely between them.
Memory Technique
If refrigerant can get there, it counts. Draw the appliance with your finger by following the flow.
Reference Hint
An appliance is the complete refrigerant circuit, including field installed tubing that carries refrigerant.
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?
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?
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An older chiller is charged with R-114, a refrigerant that boils just below forty degrees Fahrenheit at atmospheric pressure. Which class does the regulation place that appliance in?
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