Airstream TC4-NVS Mode D'emploi page 27

EXAMPLE 2
Set Point = 75
Temperature = 79.8
Differential = 3
Compensation = 2
In the second example above, the temperature has risen to:
Set Point:
Differential:
According to Table 1 above, the temperature difference of 1.8 degrees gives
a compensation factor of two. Therefore, the Time Opening value is doubled.
Temperature Falls:
When the room temperature falls by a certain number of degrees below
"temperature set point - differential", the controller increases the Time Closing
value and reduces the Time Off value so that the total cycle time remains
unchanged.
The lower the room temperature, the faster the curtains close. When the
Time Off value is below 10 seconds, the curtains begin to close continu-
ously. The controller uses the compensation factors given in Table 1.
o
F
o
F
o
F
ON
OFF
+
+
=
TC4-NVS
TIME
OPENING
CYCLE
o
75 F
o
3 F
o
1.8 F
o
79.8 F
TC4-NVS.rev.04
27