JOHNSON CONTROLS
30
FORM 160.67-O2
ISSUE DATE: 10/9/2020
SECTION 2 - PRE-STARTUP AND SYSTEM OPERATING PROCEDURES
TIMING DIAGRAM – (AUTOMATIC START)
FIGURE 8 - OPERATION SEQUENCE TIMING DIAGRAM (AUTOMATIC START)
LD12577
NOTES:
1. Text in quotations indicates a Display Message.
2. Start-Up Time, Run Time, Soft Shutdown Time, and System Coastdown Time will vary depending on the system conditions and programmable setpoints.
3. Speeds and times shown, if programmable, are shown with default values.
4. During the Run Time, the Operating Speed may be anywhere from 3200-4500 RPM depending on Load and System Operating Conditions.
5. Only applicable to the following shutdowns: Low Water Temperature, Remote/Local Cycling (TB4-13), Remote Stop (TB4-8), Remote Stop (ISN Serial
Port). Operator initiated Soft Shutdown.
6. Chillers manufactured after December 2006 are not supplied with separate steam inlet and slow roll bypass valves.
“CHILLER UNLOADING BEFORE SHUTDOWN”
TURBINE AUXILIARY OIL PUMP ON
ENERGIZE TURBINE STEAM RING
DRAIN SOLENOID
ENERGIZE OIL RETURN & LIQUID
LINE SOLENOIDS
ENERGIZE TURBINE TRIP, VACUUM
BREAKER, & MAIN STEAM INLET
BLOCK VALVE AIR DUMP SOLENOIDS
TURBINE AUX. OIL PUMP ON
AUTO ZEROING DIFFERENTIAL
OIL PRESSURE TRANSDUCERS
CHILLED LIQUID FLOW SWITCH BYPASS
RUN
TIME
(SEE
NOTE 4)
START-UP TIME
SLOW ROLL
WARM-UP
SOFT SHUTDOWN TIME
(SEE NOTE 5)
“SYSTEM COASTDOWN”
OIL PRESSURE CHECK
COMPRESSOR OIL
PUMP ON
HOTWELL
PUMP ON
“COMPRESSOR
SHUTDOWN
TURBINE
COOLDOWN”
PUMP ON
“START SEQUENCE
INITIATED”
ENERGIZE TURBINE
TRIP SOLENOID
“SYSTEM STARTING”
“SLOW ROLLING” 500
1500
1000
3000
3200
4000
4500
“RAMPING TO
TED SPEED”
TIME IN SECONDS
SPEED IN RPM
CONDENSER LIQUID
FLOW SWITCH BYPASS
VACUUM PUMP ON
1800
(30.0)
360
(6.0)
70
(1.2)
35
(0.58)
50
(0.83)
45
(0.75)
13
(0.22)
10
(0.17)
0
START
INITIATED
0
“READY
TO RUN”
0
STOPPED
CHILLED LIQUID
PUMP ON
ENERGIZE OIL COOLER
LIQUID VALVE ACTUATORS
“TURBINE
STABILIZING”
MAN. OIL
PUMP
DISABLED
SHUTDOWN
MAIN STEAM INLET BLOCK
VALVE & STEAM INLET SLOW ROLL
BYPASS VALVE ARE CLOSED
MAIN STEAM INLET
BLOCK VALVE IS
RAMPED OPEN
SPEED SETPOINT IS RAMPED
UP TO 1000 RPM
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