A machine room housing an R-123 chiller has to have mechanical ventilation and a refrigerant vapor detector. Which body of requirements is the source of those provisions?
Correct Answer
D) The mechanical safety standard for refrigeration systems adopted through the building and mechanical codes
Machine room ventilation, detector alarms and relief venting are safety requirements written in the refrigeration safety standard and enforced through the mechanical code that the local jurisdiction has adopted. The federal refrigerant rules deal with releases, recovery, certification and records, and they do not set ventilation rates or require sensors. Both bodies of rules apply to the same room, and a technician needs to know which one an inspector is quoting.
Why This Is the Correct Answer
The federal refrigerant regulations exist to keep refrigerant out of the atmosphere. Protecting the people in the machine room is the job of the refrigeration safety standard, which the mechanical code adopts and the building official enforces. That standard is where ventilation, vapor detection, alarms and relief discharge requirements come from.
Why the Other Options Are Wrong
Option A: The federal refrigerant regulations, which set ventilation rates for rooms holding low-pressure appliances
The federal refrigerant rules cover releases, recovery, certification and records. They contain no machine room ventilation rate.
Option B: The refrigerant manufacturer's warranty terms, which are enforced through the equipment supply contract
Warranty terms may recommend good practice, but they are a private contract and not the source of a machine room requirement.
Option C: The technician certification program, which conditions Type III certification on machine room compliance
Certification is a qualification held by a person. It imposes no conditions on the room the machine sits in.
Memory Technique
Atmosphere outside, people inside. Two different rulebooks for two different concerns.
Reference Hint
Machine room ventilation, vapor detection and relief venting come from the refrigeration safety standard adopted by the mechanical code.
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?
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?
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?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass
Related Study Resources
Previous Question
Water is weeping from the joint where a chiller's waterbox cover bolts to the tube sheet. What kind of leak is that, and what does it require?
Next Question
An older centrifugal chiller is converted from R-11 to R-123. What happens to the certification a technician needs to service it afterward?