An owner asks how many pounds of refrigerant the rules allow to be left inside a chiller once the recovery has been signed off. What is the correct answer to give him?
Correct Answer
D) The rule is written as a pressure level, so no residual weight is specified at all
The evacuation table sets a pressure that the appliance has to reach, not a quantity that may remain. How many pounds are left at that pressure depends on the size of the machine, how much oil it holds and how warm it is, and none of that is regulated. A technician documents the level reached and the amount recovered. Any answer expressed as a residual weight or a percentage of the charge is inventing a rule that does not exist.
Why This Is the Correct Answer
Compliance is demonstrated by a pressure reading taken at the appliance, because pressure is what a technician can actually measure at the end of a recovery. The regulation never states a permitted residual quantity, and the amount left behind naturally varies with machine size and temperature. What goes on the record is the level reached and the quantity recovered.
Why the Other Options Are Wrong
Option A: The limit is one percent of the nameplate charge, measured by weighing the cylinders
Percentage-of-charge limits belong to leak rate provisions, not to evacuation. Nothing in the evacuation requirement is written as a share of the charge.
Option B: The limit is ten pounds for any appliance holding more than two hundred pounds
This borrows the two hundred pound split from the high-pressure rows of the evacuation table and attaches a weight to it that the table never contained.
Option C: The limit is whatever the recovery unit's own certification label states as residual
A recovery unit's certification says it can reach a required level. It says nothing about how much refrigerant may lawfully remain in an appliance.
Memory Technique
The rule measures pressure, not pounds. The scale is for the cylinder, the gauge is for the machine.
Reference Hint
Evacuation requirements are stated as pressure levels reached at the appliance, never as a permitted residual quantity of refrigerant.
More epa-608-type-3 Questions
Some jobs on a chiller count as a major repair under the refrigerant rules, which changes what a technician is allowed to do with a badly leaking machine. Which job falls into that category?
The motor of a hermetic centrifugal chiller sits inside the pressure boundary rather than outside it on a shaft. What follows from that construction?
An oxygen monitor is used to decide whether a chiller machine room is safe to enter after a refrigerant release. Below what oxygen reading is the atmosphere treated as oxygen deficient?
A low-pressure chiller's rupture disc has a discharge line running from it. Where does that line have to terminate?
A refrigerant vapor detector in a chiller machine room reaches its alarm level. Besides sounding, what is that alarm expected to do?
Which piece of equipment requires a technician to hold Type III certification before it may be serviced?
What property of the refrigerant is what actually places an appliance into the low-pressure category?
During normal operation, what condition exists inside the evaporator of a running low-pressure centrifugal chiller?
In what unit is the required final recovery vacuum for a low-pressure appliance normally expressed?
What should a technician do about the water in the chiller tubes before pulling a deep vacuum on the machine?
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