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CHAPTER 3 - USER GUIDE
FAN 1 DIFFERENTIAL
The Fan 1 differential setting establishes the
temperature at which Fan 1 reaches maximum
speed. The value is a temperature difference
from the main set point.
The Fan 1 differential is adjusted in 0.5 degree
increments from a minimum setting of 2.0°F
(1.0°C) to a maximum setting of 18.0°F (10.0°
C).
Adjusting the Fan 1 differential:
• rotate the Selector dial to position (12),
•
rapidly rotate the Adjustor dial back and
forth to enter secondary function mode,
• rotate the Selector dial to position (3),
•
rotate the Adjustor dial counterclockwise to
decrease the period, clockwise to increase
it.
The Fan 1 Differential setting is displayed on
the ECS.
Example: A main set point
temperature of 70°F along with a
Fan 1 differential setting of 5°F is
set. When the temperature of the
room reaches 75°F, Fan 1
operates at its maximum speed.
Diff
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