York YT Millennium, Эксплуатация и техническое обслуживание

Страница: 17 / 156

FORM 160.55-O1 (920)
17
YORK INTERNATIONAL
Only qualified service personnel utilize this access level.
This level provides advanced control over many of the
chiller functions and allows calibration of many of the
chiller controls. The access levels are listed above in
hierarchical order beginning with the lowest level and
proceeding to the highest level. Users logged in under
higher access levels may perform any actions permitted
by lower access levels.
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. Proper procedure requires that after
making necessary setpoint adjustments the user return
to the Home Screen and logout.
Logout
Access Level Required:
OPERATOR
This key is displayed when a user is logged in at any
level other than VIEW . Pressing it will return the access
level to VIEW .
Print
Access Level Required:
VIEW
Use this key to generate a hard-copy report of the present
system status. This provides a snapshot of the primary
operating conditions at the time the key is pressed. The
History page provides enhanced reporting capability.
(See HISTORY below.) This option will not be present
if the chiller is presently configured to log any incoming
Adaptive Capacity Control map points. (See the Adap-
tive Capacity Control Details screen.)
Message Clear
Access Level Required: SERVICE
When certain safety or cycling conditions have been
detected and the chiller has been shutdown, the main
status display of the chiller will continue to display a
message indicating the cause of the shutdown. Using
this key, the message can be cleared once the condition
has been removed.
Warning Reset
Access Level Required: OPERATOR
Use of this key acknowledges a warning condition and
resets the message display associated with it.
NAVIGATION
System
Used to provide additional system information.
Evaporator
A detailed view of all evaporator parameters, including
the programmable Leaving Chilled Liquid Setpoints.
Condenser
A detailed view of all condenser parameters, including
control of the purge functions.
Compressor
A detailed view of all the compressor parameters. This
includes pre-rotation vane control, Hot Gas Bypass
Control and PRV calibration.
Oil Sump
A detailed view of all the oil pump and oil sump pa-
rameters.
Motor
A detailed view of the motor controller parameters, spe-
cific to the controller type presently utilized on the chiller
system. This allows programming of the Current Limit
and the Pulldown Demand Limit values. For a VSD
system, the Adaptive Capacity Control and Harmonic
Filter information is controlled under this screen.
Setpoints
This screen provides a single location to program the
most common system setpoints. It is also the gateway
to many of the general system setup parameters such as
Date/Time, Display Units, Scheduling, Printer Setup,
etc.
History
This screen provides access to a snapshot of system data
at each of the last 10 shutdown conditions.
2