Johnson Controls YORK YK MaxE, Operation Manual

Page: 68 / 184

JOHNSON CONTROLS
68
FORM 160.54-O1
Mod “a” soLid state starter sCreeN
oVerVieW
This screen displays all information pertaining to the
Mod “A” Solid State Starter.
dispLaY oNLY
Motor Run (LED)
Indicates whether the digital output from the controls is
commanding the motor to RUN.
Motor Current % Full Load Amps
Displays the motor current as a percentage of the Full
Load Amps (FLA) value. For the Solid State Starter this
is the data returned by the Starter Logic board.
Current Limit Setpoint
Displays the current limit value in use. This value could
come from a 0-20mA, 4-20 mA, 0-10VDC or 2-10VDC
input in Analog Remote mode, PWM signal in Digital
Remote mode, MicroGateway interface in ISN mode,
or a locally programmed value.
Pulldown Demand Time Left
Displays the time remaining in the programmed
pulldown period if the value is nonzero.
Scale/Model
Display information about the Liquid Cooled-Solid State
Starter Rating and the maximum allowed Full Load
Amps.
Voltage - Phase A, B, C
Display the 3-phase input line voltage values being read
from the Solid State Starter.
Current - Phase A, B, C
Display the 3-phase motor current values being read
from the Solid State Starter.
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 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
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.
LD10707
fig. 17
optiView Control Center