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TC5-8SDA rev.03
TC5-8SDA
RAMPING OPTION
The user has two options for controlling the transition from the mini-
mum ventilation cycle to full operation of the Stage 1 fans, i.e. in the
temperature interval between the set point and the set point + Stage 1
differential. In the first option (ramping), the running time of the fans is
increased (or decreased) gradually to smooth out the transition between
full operation of Stage 1 fans and the minimum cycle. In the second
option, no transition is made from the minimum cycle to full operation of
the Stage 1 fans. The running time of the fans is simply defined accord-
ing to the minimum ventilation cycle.
This option is activated from the front panel. At room temperatures
at or below the set point, the controller operates the Stage 1 fans
according to the minimum ventilation cycle.
If the room temperature rises above the set point, a new TIME ON is
calculated periodically as the temperature increases to allow a
smooth progres
DIFFERENTIAL 1
SET POINT
STAGE 1
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TIME ON =
CYCLE TIME
TIME ON
MINIMUM
VENTILATION
CYCLE
Option 1: With Ramping
Running
Time
C
A
Indoor Temperature
0.3
o
F
B