Johnson Controls YORK YK MaxE, Operation Manual

Page: 77 / 184

FORM 160.54-O1
77
JOHNSON CONTROLS
Output Current
Displays the average of the 3-phase output current to the
motor. Value is provided by the MV VSD.
Input Voltage
Displays the average of the 3-phase input voltage to the
MV VSD. Value is provided by the MV VSD.
VSD Cooling Fans Output
(LED)
Illuminates when the VSD cooling fans are being com-
manded to run.
Precharge Relay Output
(LED)
Illuminates when the pre-charge relay is commanded
to energize.
Output Current
(Phase A, B, C)
Displays the three phases of output current to the motor.
DC Bus Voltage (Phase A, B, C)
Displays the three phases of DC Bus voltage
MV VSD Model
Displays the model number as received from the MV
VSD. The Model Number is displayed as a number
representing the horsepower rating (ie; 1500HP). With
software version C.OPT.01.20.307 (and later), it is de-
rived from the Motor Rated Voltage (Modbus Address
40012) and the Programmed Drive Current (Modbus
Address 40013) values received from the MV VSD ac-
cording to the following table. If this results in a model
that is not defined in the lookup table, the model number
is displayed as “INVALID” and the chiller will not be
allowed to run while this is displayed
Motor rated Voltage (V)
2300 V 3300 V 4160 V
Model in
HP
500 107 A 78 A 62 A
600 129 A 93 A 74 A
700 157 A 110 A 87 A
800 172 A 124 A 99 A
900 202 A 141 A 112 A
1000 224 A 156 A 125 A
1250 280 A 195 A 155 A
1500 336 A 235 A 186 A
1750 392 A 274 A 217 A
2000 438 A 312 A 248 A
2250 494 A 345 A 274 A
2500 561 A 391 A 310 A
Max. Job/Rated 100% FLA (A) (Programmed Drive Current)
Motor Voltage Rating
Displays the voltage rating of the MV VSD as re-
ceived from the MV VSD . With software version
C.OPT.01.20.307 (and later), this is the motor voltage
rating (Modbus Address 40012) as received from the
MV VSD. Displayed as 1300V, 3300V or 4160V. If an
invalid value is received, “INVALID” is displayed and
the chiller will not be allowed to run.
Output Frequency Rating
(software version C.OPT.01.20.307 and later)
This is the rated output frequency (Modbus Address
40033), as received from the MV VSD. This value is
the maximum drive frequency (Hz) when the MV VSD
receives a 100% speed command from the Optiview
Control Center. If the value received is not 50Hz or
60Hz, “INVALID” is displayed. If this is the case, then
the “Motor Voltage Rating” (above) determines the
maximum frequency as follows:
Motor Voltage Rating Output Frequency Rating
2300 or 4160V 60Hz
3300V 50Hz
prograMMaBLe
Local Motor Current Limit
Access Level Required : OPERATOR
Allows the user to specify the maximum allowed mo-
tor 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
Access Level Required
: OPERATOR
Allows the user to specify the current limit value (as
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
Access Level Required : OPERATOR
Allows the user to set a period of time for which the pulldown
demand limit will be in effect after the chiller starts.
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