York YK-EP, Operation And Maintenance Manual

Page: 101 / 268

Table 95: Programmable
Button Access level Description
Local Motor
Current Limit Operator
Allows the user to specify the maximum allowed motor current (as
a percentage of FLA). When the motor current reaches this value,
the Pre-Rotation Vanes will not be permitted to open further. If the
motor current rises above this value, the Pre-Rotation Vanes will
close to reduce the current to this value.
Pulldown
Demand
Limit
Operator
Allows the user to specify the current limit value (as a percentage
of FLA) to which the chiller will be limited during the specified
pulldown limit time. This value will override the Motor Current
Limit value during this time period. This function is used to provide
energy savings following chiller start-up.
Pulldown
Demand
Time
Operator
Allows the user to set a period of time for which the pulldown
demand limit will be in effect after the chiller starts.
Full Load
Amps
Operator
Define the maximum amps at which the motor can operate. This
value is viewable when logged in under the OPERATOR or VIEW
access level.
Supply
Voltage
Range
Service
Allows the user to select a specific voltage range for voltage
checking. When not disabled, this line voltage range is used to
determine a low line and high line voltage threshold for initiating a
shutdown.
Current
Unbalance
Check
(Enabled /
Disabled)
Service
Allows the user to control whether the logic checks for current
unbalance and initiates a shutdown as a result.
Table 96: Navigation
Button Access level Description
Home View Returns user to HOME Screen.
Motor Lube View
Moves to the subscreen allowing operator acknowledgement of the
compressor motor lubrication and viewing of the compressor motor
lubrication parameters. Only displayed if Motor Auto Lube type is
other than None.
Motor Details Service
Moves to a subscreen that provides information and setpoints
pertinent to the Motor Monitoring feature if this option is installed.
101 YK-EP Style B Centrifugal Chiller