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PSG Chiller Control vs Retrofit/Upgrade 

Features List	PSG Process ​ Chiller Controller	Retrofit / Upgrade Process Chiller Control
Real-Time Temperature and Pressure Readings	YES	​YES
​Control operates to a +/- 1°F accuracy	​YES	YES
1 or 2 compressor control capability	​YES	YES
Operates and displays in °F and °C	​YES	YES
Controls chiller on inlet or outlet temperature	​YES	YES
​Automatic compressor lead lag on dual circuit chillers	YES	YES
Monitors and logs compressor run hours	YES	YES
Compressor Run Time Hours Tracking	​YES	YES
System Pump Run Time Hours Tracking	NO	YES
Recirc Pump Run Time Hours Tracking	​NO	YES
On screen alarm trending	NO	YES
Removable SD card alarm event tracking	NO	YES
Modbus (Slave) networkable	NO	YES
Optional BacNet network integration	NO	YES
TCP (Ethernet) capable	NO	YES
Remote email alarming capabile	​NO	YES
Scheduled operational status (heartbeat) emails	NO	YES
Free downloadable, field installed software updates	NO	YES
Replaceable pilot relays	​NO	YES
NON-OEM temperature sensors	NO	YES
​NON-OEM temperature pressure transducers	NO	YES
Built in web server for remote access for monitor or control. (MOXA network switch required)	NO	YES
Integrated remote chiller start stop support	NO	YES
​Integrated remote system pump support	​NO	YES
​Integrated phase monitor safety support	NO	YES
​​Integrated compressor module safety support	NO	YES
​Integrated compressor module safety support	NO	YES
Predictive maintenance alarming features	NO	YES
On screen troubleshooting assistance	NO	YES

* Demand for these retrofit is high, please contact Legacy Chiller Systems for latest pricing and availability - Call - (971)801-2742