| Abbreviation |
System Component |
| BD |
Booster Discharge |
| CD |
Condenser |
| DS |
Defrost Condenser |
| ES |
Economizer Suction |
| HGD |
Hot Gas Defrost |
| HPL |
High Pressure Liquid |
| HSD |
High Stage Discharge |
| HSS |
High Stage Suction |
| HTRL |
High Temperature Recirculated Liquid |
| HTRS |
High Temperature Recirculated Suction |
| LIC |
Liquid Injection Cooling |
| LSS |
Low Stage Suction |
| LTRL |
Low Temperature Recirculated Liquid |
| RV |
Relief Vent |
| TSR |
Thermosyphon Return |
| TSS |
Thermosyphon Supply |