York YR Manual page 20

Optiview Control Center
SECTION 2 - OPTIVIEW™ CONTROL CENTER
Change Setpoints
On screens containing setpoints programmable at the
OPERATOR access level, a key with this label will be
visible if the present access level is VIEW. This key
brings up the Access Level prompt described above. It
allows the user to login at a higher Access Level with-
out returning to the HOME screen. After login, the user
may then modify setpoints on that screen.
Setpoints
The control center uses the setpoint values to control
the chiller and other devices connected to the chiller
system. Setpoints can fall into several categories. They
could be numeric values (such as 45.0°F for the Leav-
ing Chilled Liquid Temperature), or they could Enable
or Disable a feature or function.
Regardless of which setpoint is being programmed, the
following procedure applies:
1. Press the desired setpoint key. A dialog box ap-
pears displaying the present value, the upper and
lower limits of the programmable range, and the
default value.
2. If the dialog box begins with the word "ENTER",
use the numeric keys to enter the desired value.
Leading zeroes are not necessary. If a decimal
point is necessary, press the '•' key (i.e. 45.0).
3. Pressing the ▲ key, sets the entry value to the de-
fault for that setpoint. Pressing the ▼ key clears
the present entry. The ◄ key is a backspace key
and causes the entry point to move back one
space.
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4. If the dialog box begins with "SELECT", use the
◄ and ► keys to select the desired value.
5. If the previously defined setpoint is desired, press
the 'X' (Cancel) key to dismiss the dialog box.
6. Press the '√' (Enter) key.
7. If the value is within range, it is accepted and the
dialog box disappears. The chiller will begin to
operate based on the new programmed value. If
out of range, the value will not be accepted and
the user is prompted to try again.
Manual Controls
Some keys are used to perform manual control func-
tions. These may involve manual control of items such
as the slide valve. Other keys in this category are used
to initiate/terminate processes such as calibrations or
reports.
Free Cursor
On screens containing many setpoints, a specific "soft"
key may not be assigned to each setpoint value. A soft
key will be assigned to enable the cursor arrow keys be-
low the numeric keypad which are used to "highlight"
the desired setpoint field. At this point, the '√' key is
pressed to bring up a dialog prompting the user to en-
ter a new setpoint value. The 'X' key cancels Cursor
mode. (See the SCHEDULE screen for an example.)
FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
JOHNSON CONTROLS