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EXPERT LA
6.2.2
Stage 1 Ramping (Transition
between Min. Vent. & Stage 1)
The controller can gradually increase (or decrease)
the running time of the fans to smooth out the
transition from the minimum ventilation cycle to
full operation of stage 1 fans.
At room temperatures at or below the set point,
the controller operates the fans of stage 1 accord-
ing to the minimum ventilation cycle.
If the room temperature rises above the set point,
a new On Time is calculated periodically as the tem-
On Time =
Cycle time
On Time
Ramping Settings
To use the ramping function, enable the "Ramping
on stage 1" function in the Installation Setup (sec-
tion 4.5) and adjust the differential of stage 1 in
section 6.2.3.
Stage 1 Ramping
Run Time
A
Min. Vent.Cycles
Stage 1
Start T°
perature increases to allow a smooth progression
(from point A to point B) up to full operation of the
fans when the set point + differential 1 is reached
(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 fans of stage 1 operate continuously).
If the room temperature decreases 0.3°F below
the set point + differential 1, the On Time value
of the minimum ventilation cycle decreases gradu-
ally from a value equal to the total cycle time (point
C) towards the regular On Time.
B
0.3°F
C
Stage 1 Differential
Room T°
EXPERT LA rev.00
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