25
TC5-8SDA rev.03
TC5-8SDA
sion (from point A to point B) up to full operation of the fans when the
set point + differential 1 is reached*.
If the room temperature decreases 0.3
o
F below the set point +
differential 1, the TIME ON value of the minimum ventilation cycle
decreases gradually from a value equal to the total cycle time (point
C) to the value defined by the parameter settings (TIMER STAGE 1 -
TIME ON).
This option is activated when ramping is turned off. When the tempera-
ture is less than the set point + differential 1, Stage 1 fans run accord-
ing to the minimum cycle (see above). When the room temperature
reaches point A, stage 1 fans run continuously with no transition.
When the temperature decreases to the set point, Stage 1 fans start
operating according to the minimum ventilation cycle.
* When Time Off becomes less than 15 seconds, it is fixed at 15 seconds
until the temperature has reached the set point + differential 1. At that
point, the stage 1 fans operate continuously.
DIFFERENTIAL 1
SET POINT
STAGE 1
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
1234567890123456789012345
TIME ON =
CYCLE TIME
TIME ON
MINIMUM
VENTILATION
CYCLE
Indoor Temperature
Running
Time
A
Option 2: Without Ramping