Carrier RTU Open v5 Integration Manual page 41

FREECOOL
COOL
PRESSURIZATION
EVACUATION
VENT
See the air source's installation manual for more specific operation.
RTU Open v5
Integration Guide
Air source fan is on and providing cooling using only the economizer and
usually during an unoccupied period. All zones modulate airflow to maintain
the zone temperature at the occupied cooling setpoint regardless of the
zone's actual occupancy status.
Air source fan is on and providing cooling. Equipment SAT is below the
reference zone temperature and all zones modulate airflow to maintain the
zone temperature at the appropriate (occ/unocc) cooling setpoint.
Air source supply fan is on usually as a result of a fire-life safety input being
active. It may also be used as a safety to increase airflow during a heating
mode. All zones modulate airflow to maintain the zone's maximum cooling
airflow.
Air source supply fan is off usually as a result of a fire-life safety input being
active. All zone dampers close and local terminal fans are disabled.
Air source fan is on and providing ventilation without heating or cooling.
37
Sequence of Operation
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