Bryant 559F - Manual (Page 40)

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SWITCH CLOSES
ON BP,SP,E
EMC EAS
*
OPEN
ON BP
OPEN ON E
CLOSED ON BP
OPEN
ON SD
CLOSED ON
BP,SP,E
COMPRESSOR WIRING
See Legend on page 2.
*Included in power exhaust accessory.
NOTE: All switches are field supplied.
OPERATING MODES
Fig. 21 — Smoke Control/Fire Shutdown Wiring; 579F180-300
BP — Building Pressurization: Evaporator fan on, economizer energized to fully open position,
power exhaust disabled.
E — Evacuation: Evaporator fan off, economizer energized to fully open position,
power exhaust on (open).
SD — Complete Unit Shutdown: Breaks 24-v power to the thermostat.
SP — Smoke Purge: Evaporator fan on, economizer energized to fully open position,
power exhaust on.