To Display Daily Schedule Setpoints; To Display Data Logger Setpoints; Programming System Setpoints; To Display Holiday Setpoints - York MILLENNIUM YIA-ST-1A1 Operation Manual

To display DAILY SCHEDULE setpoints:

• Press and hold the DAILY SCHEDULE setpoint key.
The chiller start and stop times for each day of the
week are sequentially displayed, beginning with
Sunday and ending with Holiday. The display will con-
tinuously scroll until the DAILY SCHEDULE key is
released.
– or –
• Press and release the DAILY SCHEDULE setpoint
key. Then press and release the DISPLAY HOLD key.
The chiller start and stop times for each day of the
week are sequentially displayed beginning with Sun-
day and ending with Holiday. The display will continu-
ously scroll until the DISPLAY HOLD key is again
pressed and released or 10 minutes have elapsed,
whichever comes first.
To display message from DAILY SCHEDULE will scroll
in the following sequence:
SUN START = 08:30 AM STOP = 06:00 PM
MON START = 05:00 AM STOP = 07:00 PM
TUE START = 05:00 AM STOP = 07:00 PM
WED START = 05:00 AM STOP = 07:00 PM
THU START = 05:00 AM STOP = 07:00 PM
FRI START = 05:00 AM STOP = 07:00 PM
SAT START = 05:00 AM STOP = 07:00 PM
HOL START = 00:00 AM STOP = 00:00 PM

To display HOLIDAY setpoints:

Use the HOLIDAY setpoint key as described in the be-
ginning of this section to produce the following message:
S M T W T F S HOLIDAY NOTED BY *
NOTE: On the days that are designated by *, the chiller
will automatically start and stop per the holiday
schedule established in DAILY SCHEDULE
setpoints.
To display REMOTE RESET TEMP RANGE setpoint:
Use the REMOTE RESET TEMP RANGE setpoint key
as described above to produce the following message:
REMOTE RESET TEMP RANGE = 10°F
94
– or –
REMOTE RESET TEMP RANGE = 20°F

To display DATA LOGGER setpoints:

Refer to YORK, Form 155.16-NO1.2 for operation of this
key.
PROGRAMMING THE ISOFLOW CONTROL
CENTER

PROGRAMMING SYSTEM SETPOINTS

The system setpoints can be entered at any time . . .
even when the system is running. Proceed as follows to
enter system setpoints (refer to Fig. 3).
1. Press ACCESS CODE key.
2.
ENTER VALID ACCESS CODE
3. Using Entry keys, enter 9 6 7 5.
4. As each digit is entered, the characters Y O R K are
displayed.
NOTE: If digits other than 9 6 7 5 are entered, Y O R K
is still displayed.
NOTE: For ease in remembering the code, note that
the letters Y O R K correspond to the digits
9 6 7 5 on a telephone dial.
5. Press ENTER key.
NOTE: If digits other than 9 6 7 5 were entered in Step
No. 4.
INVALID ACCESS CODE
ENTER key is pressed. If this occurs, enter the
correct access code (9675) and proceed.
6.
ACCESS TO PROGRAM KEY AUTHORIZED
NOTE: Unless terminated by pressing the ACCESS
CODE key again, the operator will have access
to the PROGRAM key for 10 minutes. When 10
minutes have elapsed, access to the program
key will be automatically disabled and the op-
erator must return to Step No. 1 to gain access.
7. Press PROGRAM key.
8.
PROGRAM MODE, SELECT SETPOINT
is displayed.
is displayed when the
is displayed.
is displayed.
YORK INTERNATIONAL