S90-600 O FRICK QUANTUM EVAPORATOR CONTROL PANEL
Page 20 OPERATION
CONTROL SETUP -
“DEFROST SCHEDULE” SCREEN
The “Defrost Schedule” is a schedule of what time of day
to start defrosting the zone. The time of day is
represented using a 24-hour clock, i.e. 00:00 is midnight
and 23:59 is a minute before midnight. Each unit can have
up to eight defrosts scheduled per day that can vary each
day of the week. An entry of “-” will void the time entry
field. If liquid override is enabled, these times are also
dependent on a “Liquid counter” setpoint. The liquid
counter counts a cumulative time that the liquid solenoid
output is open between defrosts. When the panel reaches
a time in the Defrost Schedule and the liquid counter
exceeds the “Liquid counter” setpoint, then the unit goes
into it’s defrost mode. If the counter has not exceeded the
“Liquid counter” setpoint, no defrost is initialized. There is
a possibility for five defrost steps. The length of time for
each step is adjustable on the “Defrost Setpoints” screen.
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