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FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
When toggled to the left-most position, it is considered
in the START state. Each state is described in detail
below:
Stop / Reset (O)
When in this position, the chiller will not run under any
condition. For safety reasons, this position is required
for many maintenance tasks to be completed. In addi-
tion, the switch must be placed in this state following a
safety shutdown before the chiller is allowed to restart.
This guarantees that manual intervention has taken
place and the shutdown has been acknowledged.
Start (◄ )
The switch can only remain in this position when be-
ing acted upon by a manual force. Once the user has
released the switch, it automatically reverts to the RUN
position. Generally, this state only occurs momentarily
as the operator attempts to locally start the unit. Once
this position has been sensed, if all fault conditions are
cleared, the unit will enter the "Start Sequence Initi-
ated" cycle.
Run ( ■ )
When in this position, the chiller is able to operate.
The switch spring-returns to this state after it has been
toggled to the START position. When in this state, the
chiller is allowed to function normally, and will also
allow the chiller to automatically restart following a
cycling shutdown. The switch must be in this state to
receive a valid remote start signal when operating un-
der a remote control source.
INTERFACE CONVENTIONS
Overview
The new graphical display on each control panel al-
lows 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 de-
scribe the graphical elements on the screen and give
a short summary of the functions available. Each ele-
ment 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 sub-screen.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW™ CONTROL CENTER
Display Only
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 ac-
cess level. Each of the programmable values requires
a specific Access 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
In order to program any setpoints on the system, the
user must first login with an appropriate access level.
When power is applied to the chiller, the system be-
gins with an Access Level of VIEW. This will allow
the user to navigate to most screens and observe the
values displayed there. However, the user will not be
allowed to change any values. To change any values,
the user must return to the HOME screen (shown by
default when power is applied to the system), and use
the Login button or utilize the Change Setpoints key de-
scribed below. At this point, the user will be prompted
to enter a User ID and the corresponding password. By
default, the User ID is zero (0). In order to gain stan-
dard OPERATOR level access, the password would be
entered as 9 6 7 5, using the numeric keypad. OPERA-
TOR access reverts to the VIEW level after 10 continu-
ous minutes without a key press. If a custom User ID
and password have been defined (see USER screen),
the user may enter that User ID and the corresponding
password value.
If the correct password is received, the user is autho-
rized with the appropriate Access Level. If an incorrect
password is entered, the user is notified of the failure
and prompted again. At this point the user may retry
the password entry, or cancel the login attempt.
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