Carrier AquaEdge 19DV series Start-Up, Operation And Maintenance Instructions Manual page 14

MACHINE SAFETIES
EVAPORATOR PUMP
CONDENSER
WATER PUMP
WATER FLOW, CHILLED WATER
TEMP, GUIDE VANES, REF PUMP,
TOWER FAN CONTROL
REF PUMP
COMPRESSOR,
COMPRESSOR ONTIME,
SERVICE ONTIME
15-MINUTE
START-TO-START
2-MINUTE
STOP-TO-START
PURGE DRAIN
3-WAY
ACTUATED
VALVE
STARTS IN 12 HOURS 8 (not counting recycle restarts or auto restarts after power failure)
COND PRESSURE COND PRESS OVERRIDE – 20 psi
#RECYCLE RESTARTS LAST 4 HOURS > 5
COMP BEARING TEMP >= COMP BEARING ALERT– 10°F (5.6°C)
COMP MOTOR WINDING TEMP COMP MOTOR WINDING– 10°F (5.6°C)
COMP DISCHARGE TEMPERATURE COMP DISCHARGE ALERT– 10°F (5.6°C)
EVAP_SAT <Evap trip point** + EVAP OVERRIDE DELTA T
EVAP REFRIG LIQUID TEMP <Evap trip point** + EVAP OVERRIDE DELTA T
AVERAGE LINE VOLTAGE UNDERVOLTAGE THRESHOLD
AVERAGE LINE VOLTAGE OVERVOLTAGE THRESHOLD
CHECK FOR GUIDE VANE 1 CALIBRATION
CHECK FOR GUIDE VANE 2 CALIBRATION
* If Prestart Check Condition is True, then resulting State is as indi-
cated in the State Number column.
† See the Controls Operation and Troubleshooting guide for alarm
and alert codes.
Fig. 12 — Control Timing Sequence for Normal Start-Up
STRAINER SIGHT GLASS
STRAINER
2-WAY
ACTUATED VALVE
PUMP
Fig. 13 — Lube Assembly Schematic
Table 2 — Prestart Checks
PRESTART CHECK CONDITION*
††
††
START INITIATED: prestart checks are made; cooler pump
A
started.*
B Condenser water pump started (5 seconds after A).
Water flows verified (30 seconds to 5 minutes maximum
after B). Chilled water temperatures checked against control
C
point. Guide vanes checked for closure. Refrigerant pump
started; tower fan control enabled.
Ref pressure verified (15 seconds minimum, 300 seconds
D
maximum after C).
Compressor motor starts; compressor on-time and service
on-time start, 15-minute inhibit timer starts (10 seconds after
E
D), total compressor starts advances by one, and the num-
ber of starts over a 12-hour period advances by one.
SHUTDOWN INITIATED; Compressor motor stops; com-
F pressor on-time and service on-time stop, and 2-minute
inhibit timer starts.
Refrigerant pump and cooler pumps de-energized (120 sec-
onds after F).Condenser pump and tower fan control may
G
continue to operate if condenser pressure is high. Cooler
pump may continue if in RECYCLE mode.
Restart permitted (both inhibit timers expired: minimum of 15
O/A
minutes after E; minimum of 2 minutes after F).
*
Auto Restart After Power Failure Timing sequence will be faster.
COOLER
REFRIGERANT FILTER
** Evap trip point = 33°F (0.6°C) (water) or EVAP REFRIG TRIP-
POINT (brine).
††Condition ignored for Eaton/Rockwell VFDs.
14
HS FLOAT CHAMBER
BEARING
SUPPLY
BEARING FILTER
PUMPOUT
DRAIN
STATE NUMBER
Alert – 100
Alert – 102
Alert – 103
Alarm – 230
Alarm – 231
Alarm – 232
Alarm – 233
Alarm – 233
Alarm – 234
Alarm – 235
Alarm – 236
Alarm – 238
†