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STAGE 2 ACTUATOR MOTOR
DIFFERENTIAL
In order to minimize erratic behavior of the
actuator motor when the ambient room
temperature or static pressure is exactly at the
main set point, the differential setting separates
this ON / OFF threshold into two: one ON
threshold and one OFF. This feature greatly
reduces equipment wear.
The temperature / pressure difference between
the two thresholds is the differential.
When a temperature probe is installed, the
differential is adjusted in 0.5 degree increments
from a minimum setting of 0.0°F (0.0°C) to a
maximum setting of 16°F (8°C) degrees.
When a pressure probe is installed, the
differential is adjusted in 0.01"H
2
O increments
from a minimum setting of 0.00"H
2
O to a
maximum setting of 0.05"H
2
O.
Adjusting the differential setting:
•
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 (2),
•
rotate the Adjustor dial counterclockwise to
decrease the setting, and clockwise to
increase it.
The differential setting is displayed on the CPS-
2M.
DIFF
CHAPTER 3 - USER’S GUIDE
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