Figure 4 - Chiller Starting Sequence And Shutdown Sequence (Em Starter And Solid State Starter); Figure 5 - Chiller Starting Sequence And Shutdown Sequence (Variable Speed Drive) - York YK Series Operation And Maintenance

SECTION 2 - SYSTEM OPERATING PROCEDURES
DISPLAY
MESSAGE
"SYSTEM RUN"
"SYSTEM PRELUBE"
** "VANES CLOSING
BEFORE
SHUTDOWN"
"SYSTEM
COASTDOWN"
"SYSTEM
SHUTDOWN"
0 10
START (0.17) (0.22) (0.75) (0.83)
** Not for all shutdowns. Refer to "Display Messages" in manual Optiview™ Control Center – Operation and Maintenance (Form 160.54-O1).
FIGURE 4 - CHILLER STARTING SEQUENCE AND SHUTDOWN SEQUENCE (EM STARTER AND SOLID
STATE STARTER)
DISPLAY
MESSAGE
"SYSTEM RUN"
"SYSTEM PRELUBE"
** "VANES CLOSING
BEFORE
SHUTDOWN"
"SYSTEM
COASTDOWN"
"SYSTEM
SHUTDOWN"
0
START
** Not for all shutdowns. Refer to "Display Messages" in manual Optiview™ Control Center – Operation and Maintenance (Form 160.54-O1).

FIGURE 5 - CHILLER STARTING SEQUENCE AND SHUTDOWN SEQUENCE (VARIABLE SPEED DRIVE)

10
AUTO ZEROING DIFFERENTIAL
OIL PRESSURE TRANSDUCERS
MAN. OIL
PUMP
DISABLED
13 45 50
TIME IN SECONDS (MINUTES)
AUTO ZEROING DIFFERENTIAL
OIL PRESSURE TRANSDUCERS
MAN. OIL
PUMP
DISABLED
10 13 45 50
(0.17) (0.22) (0.75) (0.83)
TIME IN SECONDS (MINUTES)
FLOW
BYPASS
SWITCH
110
VANES VANES
(1.83) START CLOSED
TO
CLOSE
ENERGIZE (OPEN)
OIL RETURN SOLENOID & LIQUID LINE
SOLENOID (J COMPRESSORS ONLY)
** VANES CLOSING - TIME
DEPENDENT ON INITIAL
VANE POSITION
OIL PRESSURE CHECK
FLOW
BYPASS
SWITCH
110
VANES VANES
(1.83) START CLOSED
TO
(IF FIVE SUCCESSIVE
CLOSE
RESTARTS HAVE NOT
FORM 160.76-O1
ISSUE DATE: 6/15/2015
ENERGIZE (OPEN)
OIL RETURN SOLENOID & LIQUID LINE
SOLENOID (J COMPRESSOR ONLY)
** VANES CLOSING - TIME
DEPENDENT ON INITIAL
VANE POSITION
OIL PRESSURE CHECK
OIL PUMP ON
150 SEC.
(2.5 MIN)
1800
(30)
RESTART
OIL PUMP ON
150 SEC.
(2.5 MIN)
600
(10)
RESTART
RESTART
(ONLY AFTER FIFTH
SUCCESSIVE RESTART)
OCCURED)
JOHNSON CONTROLS
LD06502
LD06504