York YZ MODEL A, Руководство по эксплуатации и обслуживанию

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JOHNSON CONTROLS
27
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
3
SECTION 3 - OPTIVIEW™ CONTROL CENTER
FUNCTIONS AND NAVIGATION
INTERFACE CONVENTIONS
Each screen description in this document will begin
with a section describing the graphical elements on
the screen along with a short summary of the functions
available. Each element on the screen will then be cat-
egorized into three distinct groups:
• Display Only Fields
• Programmable
• Navigation
The Programmable values and Navigation commands
are also subject to access level restrictions as described
below. For each of these elements, an indication is
given to show the minimum access level required to
program the value or navigate to the subscreen.
Display Only Fields
Values in this group are read-only parameters of in-
formation about the chiller operation. This type of in-
formation may be represented by a numerical value, a
text string, or an LED image. For numerical values, if
the monitored parameter is above the normal operat-
ing range, the high limit value will be displayed along
with the ‘>’ symbol; if it is below the normal operating
range, the low limit value will be displayed along with
the ‘<’ symbol. In some cases, the value may be ren-
dered invalid by other conditions and the display will
use X’s to indicate this.
Programmable
Values in this group are available for change by the user.
In order to program any setpoints on the system, the user
must first be logged in with the appropriate access level.
Each of the programmable values requires a specific ac-
cess level which will be indicated beside the specified
value. All of the programmable controls in the system
fall into one of the categories described below:
Access Level
The OptiView Panel restricts certain operations based
on password entry by the operator. Three different ac-
cess levels are provided as follows:
• VIEW: The panel defaults to the lowest access
level which is termed
VIEW
. In this mode, the
chiller operating values and setpoints can be ob-
served, but no changes can be made.
• OPERATOR: The second access level is termed
OPERATOR and will allow the customer to
change all of the setpoints required to operate
the chiller system. In order to gain standard OP-
ERATOR level access, the Home Screen Login
Password would be entered as 9 6 7 5, using the
numeric keypad. The OPERATOR access level
is accompanied by a 10-minute timeout. After ten
(10) successive minutes without a keypress, the
panel will revert to the
VIEW
access level. This
prevents unauthorized changes to the chiller if a
user was logged in at a higher access level and
failed to logout.
• SERVICE: In the event that advanced diagnos-
tics are necessary, a
SERVICE
access level has
been provided. Only qualified service personnel
utilize this access level. This level provides ad-
vanced control over many chiller functions and
allows calibration of many chiller controls.
The access levels are listed above beginning with the
lowest access level and proceeding to the highest ac-
cess level. Users logged in under higher access levels
may perform any actions permitted by lower access
levels. Proper procedure requires that after making
necessary setpoint adjustments the user return to the
home screen and logout.
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 logging in, 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
can be numeric values (such as 45.0°F for the Leav-
ing Chilled Liquid Temperature) and they can enable
or disable a feature or function.