Working CARRIER 210 TON COMMERICAL CHILLER

Component breakdown
30GTN: This is the product series. "30G" indicates a Carrier air-cooled liquid chiller with reciprocating compressors, and "T" and "N" designate specific product features or refrigerant type.
210: This is the capacity code, which in this case means the chiller has a nominal capacity of 210 tons.
K620PT: This is a combination of factory-installed options and configurations, which are specified in the product data sheet and decoded by Carrier. The specific details of this code would require the Carrier product literature for the corresponding year of manufacture, but it could indicate features such as:
Compressor and motor characteristics.
Control system options, like the ComfortLink control.
Specific electrical details.
Noise level reduction options.
Key features of the 30GTN chiller series
Controls: The ComfortLink control system features advanced microprocessor controls for easy operation, temperature management, and network communication.
Efficiency: The design focuses on high efficiency, particularly under part-load conditions, with dual independent refrigeration circuits.
Construction: The units have weatherproof construction for rooftop or ground-level installation and use semi-hermetic compressors.
Refrigerant: Older 30GTN units were charged with HCFC-22 refrigerant. Later models may use different refrigerants, such as HFC-134a.