Carrier 39L Fig. 50 Smoke Control Option Wiring Schematic (39NX)

LEGEND

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

RFR — Return Fan Relay

SF — Supply Fan Contactor

SFR — Supply Fan Relay

TB — Terminal Block

TRAN — Transformer

Factory Wiring

Field Wiring

*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)