YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

SECTION 8 - MICROPANEL
appear. The start and stop time of each day may be programmed
differently.
To view the schedule without making a change, simply
press the SCHEDULE key until the day you wish
to view appears. The ▲ (UP ARROW) key will scroll
backwards to the previous screen.
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If at any time the schedule is changed for
Monday, all the other days will change to
the new Monday schedule. This means if
the Monday times are not applicable for
the whole week, then the exceptional days
would need to be reprogrammed to the
desired schedule.
To program the chiller for 24 hour operation, program
the start and stop times of each day of the week for
00:00.
After the SUN (Sunday) schedule appears on the display,
a subsequent press of the SCHEDULE or ▲ (UP
ARROW) key will display the Holiday schedule. This
is a two-part display. The first reads:
SCHEDULE UNIT OPERATING
HOL START = 00:00 AM STOP = 00:00 PM
The holiday times may be set using the same procedure
as described above for the days of the week. Be sure to
press the � (ENTER) key after setting the START and
STOP times to save the change in memory. Pressing
the SCHEDULE key a second time, the display will
show the individual days:
SCHEDULE UNIT OPERATING
S M T W T F S HOLIDAY NOTED BY *
The line below the empty space is the cursor and will
move to the next or previous empty space when the ◄
(LEFT ARROW) or ► (RIGHT ARROW) keys and
pressed. To set a day for the Holiday Schedule, the cursor
must be moved to the space following the day of
the week. The * key is then pressed and an “*” will
appear in the space signifying that day as a holiday.
The Holiday schedule must be programmed weekly. If
there is no holiday, the “*” key is also used to delete the
“*”. The � (ENTER) key is used to accept the holiday
schedule for the entire week.
The HOLIDAY SCHEDULE is a temporary
schedule. Once the schedule is executed,
the selected holidays will be cleared
from memory for the following week.
FORM 201.28-NM1.1
ISSUE DATE: 8/29/2012
Sound Limit Schedule
The SOUND LIMIT SCHEDULE allows setting the
day and time when the user desires using the “SILENT
NIGHT” factory programmed option to limit chiller
loading and fan operation for reduced audible noise in
the surrounding area. If the SOUND LIMIT SCHED-
ULE is selected under the CHOOSE SCHEDULE display,
the following message will appear:
SCHEDULE SOUND LIMIT = XXX %
MON START = 06:00 AM STOP = 10:00 PM
The Sound Limit option can be enabled and disabled
once each day or the chiller can be set to run continuously
in this mode for sound limiting whenever the
chiller is operating. When sound limiting is enabled,
the unit will be limited by the Sound Limit setpoint
% as set under the PROGRAM key. XXX in the display
above will show the Sound Limit Setpoint % programmed
under the PROGRAM key. 0% will cause no
speed reduction, while 100% only allows running at
minimum speed.
The START Time for a specific day (hour and minute)
is entered using the same guidelines used for the start/
stop schedules, and press the � (ENTER) key to store
it into memory. The cursor will then move to the AM/
PM selection.
The AM/PM selection may be chosen using the ◄
(LEFT ARROW) or ► (RIGHT ARROW) keys and
pressing � (ENTER) key to store the value.
This process is repeated for the STOP time.
Once the schedule for a specific day is programmed
and entered, the schedule for the next day will appear.
The schedule for each day may be programmed the
same or differently.
To view the schedule without changing it, simply press
the SCHEDULE key or the ▼ (DOWN ARROW) key
until the desired day is displayed. The ▲ (UPARROW)
key will scroll backwards to the previous screen.
If the schedule is changed for Monday,
all other days will change to the Monday
schedule. Be aware of this when programming.
JOHNSON CONTROLS