Interface conventions overview
The graphical display on each control panel allows a wide variety of information to be presented
to the user. Each screen description in this document will begin with a section entitled OVERVIEW
which will describe the graphical elements on the screen and give a short summary of the functions
available. Each element on the screen will then be categorized into three distinct groups: Display
Only, Programmable, and Navigation. Below is a short description of what types of information are
included in these groups.
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
Values in this group are read-only parameters of information about the chiller operation. This
type of information 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 operating 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 rendered
invalid by other conditions and the display will use X’s to indicate this.
Programmable
The user can change values in this group. In order to program any setpoints on the system, the
user must first log on with the appropriate access level. Each of the programmable values requires
a specific access level, which is indicated beside the specified value. All of the programmable
controls in the system fall into one of the categories described in the following sections.
Panel access levels for software version V09 and earlier
The OptiView panel restricts certain operations based on password entry by the operator. Two
different access levels are provided.
Table 4: Panel access levels for V09 and earlier
Access level
Description
View
The panel defaults to the lowest access level. In this mode, the chiller operating
values and setpoints can be observed, but no changes can be made.
Operator
The second access level allows you to change all of the setpoints required to
operate the chiller system. To gain standard operator level access, use the
numeric keypad to enter the Home screen logon password as
9675
. The operator
access level is accompanied by a 10-minute timeout. After 10 successive minutes
without a keypress, the panel reverts to the View access level. This prevents
unauthorized changes to the chiller if a user was logged on at a higher access
level and fails to log off.
The access levels listed in the previous table begin with the lowest access level and proceed to
the highest access level. Users logged on under higher access levels may perform any actions
permitted by lower access levels. Correct procedure requires that after making necessary setpoint
adjustments, the user returns to the Home screen and logs off.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
18
