Start-Up/Shutdown/ Recycle Sequence; Local Start/Stop Control - Carrier AquaEdge 19XR Series Start-Up, Operation And Maintenance Instructions Manual

Table 2 — Major PIC 6 Components and
Panel Locations
PIC 6 COMPONENT
Chiller Human Machine Interface (HMI)
and Display
Integrated Starter Module (ISM)
Motor Starter Protection Module (e.g
ISM, MX3 or drive control)
Chiller IO Boards and Field Wiring
Terminal Blocks
Oil Heater Contactor (1C)
Oil Pump Contactor (2C)
Hot Gas Bypass Relays (HCLR, HOPR)
(Optional)
Control Transformers (T1, T2, T3)
Temperature Sensors
Pressure Transducers
NOTE: For detailed information about the PIC 6 HMI (human
machine interface), see the 19XR with PIC 6 Controls Operation
and Troubleshooting manual.
START-UP/SHUTDOWN/
RECYCLE SEQUENCE

Local Start/Stop Control

Local start-up (or manual start-up) is initiated by pressing the gray
Start/Stop icon on the HMI interface. See Fig. 19. Note the display
may change based on product type and options selected.
Fig. 19 — Chiller Start/Stop Icon
This initiates the PIC 6 starting sequence by displaying the list of
operating modes. Press Local On to initiate start-up. See Fig. 20.
Fig. 20 — Local On
PANEL LOCATION
HMI Control Panel
Starter Cabinet
Starter/VFD dependent
Control Panel
19XR2-E; Power Panel
19XR6-7: Control Panel
19XR2-E; Power Panel
19XR6-7: Control Panel
19XR2-E; Power Panel
19XR6-7: Control Panel
19XR2-E; Power Panel
19XR6-7: Control Panel
See Fig. 21 and Fig. 22
See Fig. 21 and Fig. 22
21
NOTE: Prior to start-up, the start-to-start timer and the stop-to-
start timer must have elapsed and all alarms must be cleared (see
Troubleshooting Guide section on page 53).
When start-up is initiated, the status screen displays start-up prog-
ress and the Start/Stop icon
begins, the PIC 6 control system performs a series of pre-start tests
to verify that all pre-start alerts and safeties are within acceptable
limits. Table 3 shows appropriate Prestart Alerts/Alarms condi-
tions. If a test is not successful, the start-up is delayed or aborted.
If the tests are successful, the start-up will be in progress and the
COMPRESSOR RUN STATUS shall be "Startup." The control
shall then energize the chilled water/brine pump relay.
Five seconds later, the condenser pump relay energizes. Thirty
seconds later the PIC 6 control system monitors the chilled water
and condenser water flow devices and waits until the WATER
FLOW VERIFY TIME (operator-configured, default 5 minutes)
expires to confirm flow. After flow is verified, the chilled water
temperature is compared to CONTROL POINT plus 1/2
CHILLED WATER DEADBAND. If the temperature is less than
or equal to this value, the PIC 6 control system turns off the con-
denser pump relay and goes into a Recycle mode.
If the water/brine temperature is high enough, the start-up se-
quence continues and checks the guide vane position. If the guide
vanes are more than 4% open, the start-up waits until the PIC 6
control system closes the vanes. If the vanes are closed and the oil
pump pressure is less than 6 psi (41.4 kPa), the oil pump relay en-
ergizes. The PIC 6 control system then waits until the oil pressure
(OIL PRESS VERIFY TIME, operator-configured, default of 40
seconds) reaches 18 psi (124 kPa) which indicates satisfactorily
oil pump pressure to continue startup. After oil pressure is veri-
fied, the PIC control system waits 40 seconds, and the compressor
start relay energizes to start the compressor. Compressor ontime
and service ontime timers start, and the compressor STARTS IN 12
HOURS counter and the number of starts over a 12-hour period
counter advance by one.
Failure to verify any of the requirements up to this point will result
in the PIC 6 control system aborting the start and displaying the
applicable pre-start alert alarm state number near the bottom of the
home screen on the HMI panel. A prestart failure does not ad-
vance the STARTS IN 12 HOURS counter. Any failure after the
start command relay has energized results in a safety shutdown,
advances the starts in 12 hours counter by one, and displays the
applicable shutdown status on the display.
For normal start-up the minimum time to complete the entire pre-
start sequence is approximately 185 seconds. See Fig. 23 for nor-
mal start-up timing sequence. See Table 3 for a list of prestart
checks.
Table 3 — Prestart Checks
PRESTART CHECK CONDITION*
STARTS IN 12 HOURS 8 (not counting recycle restarts or auto
restarts after power failure)
OIL SUMP TEMP 140°F (60°C) and OIL SUMP TEMP EVAP_-
SAT + 50°F (27.8°C)
COND PRESSURE COND PRESS OVERRIDE – 20 psi
#RECYCLE RESTARTS LAST 4 HOURS > 5
COMP BEARING TEMPS ³ COMP BEARING ALERT– 10°F (5.6°C)
COMP MOTOR WINDING TEMP ³ MOTOR TEMP OVERRIDE –
10°F (5.6°C)
COMP DISCHARGE TEMPERATURE COMP DISCHARGE
ALERT– 10°F (5.6°C)
EVAP_SAT <REFRIG_TRIP + REFRIG_TRIP OVERRIDE DELTA T Alarm – 233
EVAP REFRIG LIQUID TEMP < EVAP REFRIG LIGUID TEMP)** +
EVAP OVERRIDE DELTA T
AVERAGE LINE VOLTAGE UNDERVOLTAGE THRESHOLD
AVERAGE LINE VOLTAGE OVERVOLTAGE
THRESHOLD
CHECK FOR GUIDE VANE CALIBRATION
* If Prestart Check Condition is True, then resulting State is as indicated in the
State Number column.
† See the Controls Operation and Troubleshooting guide for alarm and alert codes.
** Refrig trip point = 33°F (0.6°C) (water) and configurable for brine application.
blinks green. Once local start-up
STATE
NUMBER
Alert – 100
Alert – 101
Alert – 102
Alert – 103
Alarm – 230
Alarm – 231
Alarm – 232
Alarm – 233
Alarm – 234
Alarm – 235
Alarm – 236
†