An Industrial Refrigeration Contractor's license in NC will allow you to engage in commercial refrigeration contracting with the use of ammonia as a refrigerant gas.
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The book set includes all required references for the Industrial Refrigeration Contractor exam. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.
Ammonia Refrigeration Basics
Purging, Piping, Safety
Positive Displacement Compressors
Evaporators, Condensers, and Controls
General Statue Chapter 87, Article 5 Laws app
North Carolina Administrative Code, Chapter 6
NFPA 70 National Electrical Code