Carrier 39L Series Installation, Operation, And Start-Up Instructions page 57

AO — Analog Output
EVAC — Evacuation
EXD — Exhaust Air Damper Actuator
FSD — Fire Shut Down
HOA — HAND/OFF/AUTO Switch
HPS — High-Pressure Switch
LTT — Low Temperature Thermostat
OAD — Outside Air Damper Actuator
PRES — Pressurization
RAD — Return Air Damper Actuator
*Factory installed and wired if ordered with exhaust box.
NOTE: Return fan power circuit may be different than the supply fan
starter power.
Fig. 50 — Smoke Control Option Wiring Schematic (39NX)
LEGEND
RFR — Return Fan Relay
SF — Supply Fan Contactor
SFR — Supply Fan Relay
TB — Terminal Block
TRAN — Transformer
57
Factory Wiring
Field Wiring