Fig. 27 - Schedule Screen - York YT Millennium Operating & Maintenance

OptiView Control Center
FIG. 27
OVERVIEW
The schedule screen contains more programmable values
than a normal display screen. As such, each program-
mable value is not linked to a specific button. Instead the
Select key is used to enable the cursor arrows which
are used to highlight the day and the start or stop time
the user wishes to modify. At this point the user may
press the '' (ENTER) key to program the Start / Stop
times for that day.
In order for the Start / Stop combination to be utilized,
each Start time must have a corresponding Stop time
which occurs later in the day. The presently programmed
schedule for a given day can be cancelled by setting
both the Start time and Stop time to 12:00AM. If the
Start time equals the Stop time (with any time other
than 12:00AM), the chiller is OFF for that day. If the
user desires the chiller to operate continuously through
several days, the Stop time of Day 1 can be set to 11:
59 PM and the Start time of Day 2 can be set to 12:00
AM. The chiller will not stop but continue to operate
until the stop of Day 2.
The user has the ability to define a standard set of Start /
Stop times which are utilized every week. The user may
then specify exception Start / Stop combinations for any
day of the week up to 6 weeks in advance. At the end
of each week the schedule for the next week is created
by combining the standard week definition and the next
64
SCHEDULE SCREEN
defined exception week. The schedule is then updated
as each of the exception weeks "shifts down", leaving a
new, blank exception week in the 6
DISPLAY ONLY
None
PROGRAMMABLE
Standard Week Start/Stop Times
Access Level Required: OPERATOR
For each day of the week, the user may specify a time
for the chiller to start and a time for the chiller to stop.
The times specified in this entry week will be used as
the default for every week of chiller operation.
Exception Start/Stop Times
Access Level Required: OPERATOR
For each day of the week, the user may specify a time
for the chiller to start and a time for the chiller to stop.
These Start / Stop combinations may be scheduled up to
five (5) weeks in advance and also for the present week.
As each week goes by, the new schedule will be created
for the present week using the Exception specification
in combination with the Standard week definition, as
described above.
Schedule (Enabled / Disabled)
Access Level Required: OPERATOR
Allows the user to enable or disable the monitoring func-
FORM 160.55-O1 (920)
00365VIP
week slot.
th
YORK INTERNATIONAL