
21
SUPPLY
AIR
AIRFLOW
SENSOR
DAMPER
ACTUATOR
SUPPLY
AIR
DAMPER
SPACE
TEMPERATURE
SENSOR
CCN BUS
ZONE
CONTROLLER
24 VAC
LEAVING
AIR
100%
MAX COOL LIMIT
(DAMPER OVERRIDE
PRESSURIZATION
MODE)
MAX HEAT LIMIT
MIN HEAT LIMIT
MIN COOL LIMIT
0%
FULL HEATING
FULL COOLING
DEADBAND
COOL
WARM
OCCUPIED
COOLING
NTFC
SETPOINT
OCCUPIED
HEATING &
MORNING
WARM-UP
SETPOINT
DAMPER
OVERRIDE-
EVACUATION
MODE
<
>
% AIRFLOW
SPACE TEMPERATURE (DEGREES)
PLENUM
AIR
SUPPLY
AIR
AIRFLOW
SENSOR
DAMPER
ACTUATOR
SUPPLY
AIR
DAMPER
ELEC HEAT
SPACE
TEMPERATURE
SENSOR
CCN BUS
ZONE
CONTROLLER
24 VAC
LEAVING AIR
TEMPERATURE
SENSOR
STAGES
RELAY
12
3
LEAVING
AIR
Fig. 6 — Single Duct Air Terminal — Cooling-Only
LEGEND
Fig. 7 — Sequence of Operation for Single Duct Air Terminal — Cooling-Only
Air Source Supplying Heated Air
Air Source Supplying Cooled Air
NOTE: For 1 or 2 stage heat — use 33ZCVAVTRM.
For 3 stage heat — use 33ZCFANTRM.
Fig. 8 — Single Duct Air Terminal with Staged Electric Heat
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