Phason Supra-RS, Owner'S Manual

Page: 73 / 152

Programming the zones
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8. Enter the setback using the numbers on the keypad, or press
+
or
–
to adjust the value and then
press
ENTER
.
9. Scroll to
Start Time
and then press
ENTER
.
10. Enter the start time using the numbers on the keypad. Press
+
or
–
to select AM or PM and
then press
ENTER
.
11. Scroll to Stop Time and then press
ENTER
.
12. Enter the stop time using the numbers on the keypad. Press
+
or
–
to select AM or PM and
then press
ENTER
.
13. Press
BACK
twice to return to the Main Menu.
Programming the humidity control
If you have installed and configured a humidity sensor, you need to program the humidity
compensation. Programming the humidity compensation means setting the
humidity factor
and the
upper and lower
humidity limits
. The Supra uses these settings to compensate for high humidity
levels and it adjusts the ventilation accordingly.
The
humidity band
is the humidity range in which the Supra attempts to compensate for humidity.
The band is defined by the
upper limit
and
lower limit
.
The
humidity factor
is a number between 0 and 10 that determines the amount of humidity
compensation. A lower value produces a slight ventilation adjustment, while a higher value produces
a greater adjustment.
How humidity compensation works
The Supra uses the
humidity band
and
humidity factor
to adjust the ventilation for the zone. At the
beginning of the band (the
lower limit
), very little adjustment is made. As the humidity rises, the
adjustment increases. At or above the
upper limit
of the band, the maximum adjustment is applied.
For example, if the maximum acceptable humidity for your zone is 70%, set the
lower limit
to 70%.
The
upper limit
could be set for 90% (90% is the maximum allowed and 20% is the minimum
difference between the limits). When the humidity is below 70%, the ventilation rate is controlled by
the zone’s normal, programmed settings. As the humidity rises above 70%, humidity compensation
starts to take effect and the ventilation rate increases. When the humidity reaches 90%, the humidity
compensation reaches its maximum adjusted rate.
If the outside air is cooler than the zone temperature, the ambient temperature in the zone drops
due to the increased ventilation. This causes the heaters to switch on, which help to dry the air. It is
important to balance this effect with your heating system’s ability to maintain the temperature while
drying out the room. A lower humidity factor starting at a lower humidity level, and spread over a
wider band, is better for lower-capacity heating systems.