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Option 17 — T ime Between Equipment Stages
This selection is only available for heat pump systems. This determines the
minimum number of minutes of equipment operation on the highest compressor
stage before allowing the transition to a uxiliary heat. Available selections are 10,
15, 20, and 25. The time between stages of any individual piece of equipment,
such as low speed and high s peed compressor or fan coil stages, will be fixed at
10 minutes.
Default is 15.
Option 18 — Backlight Configuration
When OF (off), the backlight will be lit for 10 seconds after a button is pressed.
After 10 seconds of no button presses, the backlight turns off. When On, the
backlight will normally be on and dim in appearance. The backlight brightness
becomes brighter when a button is pressed. After 10 seconds of no button
presses, the backlight will return to the dimmer level until another button press
occurs. The range of brightness is 1 through 5 with 5 being full brightness.
Default is 3.
Option 19 — Dry Contact Configuration (programmable models only)
There are 3 available selections, OF, 1 and 2.
OF — The dry contact is always de--energized.
1 — The dry contact will be energized for the specified number of minutes per
hour. This selection is programmable by period. When this selection is changed
from OF to 1, the period icons are shown and the minute segments of the clock
display are shown. The triangle icon next to the WAKE period will be on and a
value between 0 and 60 will be shown in the minutes display. See Operational
Information and W iring Diagrams for f urther explanation of dry contact
configuration and use. To change the period or minutes, press the soft key below