Carrier 30GTN Installation Instructions Manual page 5

CB — Circuit Breaker
CKT — Circuit
CPCS — Compressor Protection Control Systems
CWFS — Chilled Water Flow Switch
CWP — Chilled Water Pump
CXB — Expansion Board
EMM — Energy Management Module
Fig. 4 — Making Wiring Connections for 040-110 Unit Sizes
LEGEND
EXV — Electronic Expansion Valve
FIOP — Factory-Installed Option
GND — Ground
MBB — Main Base Board
OAT — Outdoor-Air Temperature
OPS — Oil Pressure Switch
PL — Plug
SPT — Space Temperature
SW — Switch
TB — Terminal Block
TEMP — Temperature
TRAN — Transformer
UL — Unloader