SC HVAC Contractor Practice Questions - South Carolina HVAC Contractor License Exam

What is the purpose of a programmable logic controller (PLC) in commercial HVAC systems?

To store refrigerant To automate and control multiple HVAC system functions based on programmed sequences and inputs To generate electricity To replace the thermostat only

Correct Answer:

To automate and control multiple HVAC system functions based on programmed sequences and inputs

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