Minimum Ventilation Cycle - Airstream TC5-2V4SA User Manual

TC5-2V4SA
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INIMUM VENTILATION CYCLE
When the room temperature is below the set point, the Stage 1 fans operate
according to the minimum ventilation cycle. Running the fans even though
ventilation is not required for a cooling purpose is useful to reduce humidity
levels and supply oxygen to the room. It also prevents the fans from freezing
in winter.
STAGE 1 — MIN. SPEED
During time on, the Stage 1 fans run at Stage 1 minimum speed. The Stage
1 Pilot Light turns on. During time off, the Stage 1 fans do not run. The Stage
1 Pilot Light turns off. The Stage 1 minimum speed can also be defined by
a speed curve (see below).
NOTE:
The controller supplies maximum voltage to the variable-speed fans
for 2 seconds immediately following each start-up.
Minimum Ventilation Cycle Settings
1. To run the fans continuously at minimum speed, set time off to zero and
time on to any value other than zero.
2. To stop the fans, set time on to zero and time off to any value.
3. To run the fans intermittently, set time on to the desired running time
and time off to the desired off time.
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TC5-2V4SA rev.06
OFF
TIME ON
STAGE 1
TIME OFF
STAGE 1