Initial Start-Up - Carrier AquaEdge 19XR series Start-Up, Operation And Maintenance Instructions Manual

temperature difference to design conditions or minimum
differential.
The 19XR chiller refrigerant charges for each cooler and
condenser code are listed in the Heat Exchanger Data tables in
the Physical Data section of this book, pages 121 to 178. Total
refrigerant charge is the sum of the cooler and condenser
charge.

INITIAL START-UP

Before starting the chiller, verify:
Preparation —
1. Power is on to the main starter, oil pump relay, tower fan
starter, oil heater relay, and the chiller control panel.
2. Cooling tower water is at proper level and at-or-below
design entering temperature.
3. Chiller is charged with refrigerant and all refrigerant and
oil valves are in their proper operating positions.
4. Oil is at the proper level in the reservoir sight glasses.
5. Oil reservoir temperature is above 140 F (60 C) or above
CALC EVAP SAT TEMP plus 50 F (28 C).
6. Valves in the evaporator and condenser water circuits are
open.
NOTE: If the pumps are not automatic, ensure water is
circulating properly.
CAUTION
Do not permit water or brine that is warmer than 110 F
(43 C) to flow through the cooler or condenser. Refrigerant
overpressure may discharge through the relief valves and
result in the loss of refrigerant charge.
7. Access the CONTROL TEST screen. Scroll down on the
TERMINATE LOCKOUT option. Press the SELECT (to
enable the chiller to start) and answer YES to reset unit to
operating mode. The chiller is locked out at the factory in
order to prevent accidental start-up.
Dry Run to Test Start-Up Sequence
For unit-mounted Rockwell VFDs.
1. Disengage the main motor disconnect on the VFD front
panel. This should only disconnect the motor power.
Power to the controls, oil pump, and starter control circuit
should still be energized. Open the VFD enclosure, move
the VFD Test/Run switch into the "TEST" position.
Close the VFD enclosure and engage the main VFD
disconnect.
2. Observe the default screen on the ICVC: the status mes-
sage in the upper left-hand corner reads, "Manually
Stopped," Press the
CCN
the chiller controls do not go into a start mode ("Unoccu-
pied Mode" is displayed) go to the SCHEDULE screen
and override the schedule or change the occupied time.
Press the softkey to begin the start-up
LOCAL
sequences.
3. View the STARTUP display screen and verify the chilled
water and condenser water pumps have energized.
4. Verify the oil pump has started and is pressurizing the
lubrication system. After the oil pump has run about
11 seconds, the starter energizes (COMPRESSOR START
CONTACT is closed) and goes through its start-up
sequence.
or softkey to start. If
LOCAL
5. The PIC II eventually shows an alarm for motors amps
not sensed. Reset this alarm and continue with the initial
start-up.
6. Disengage the main VFD disconnect. Open the VFD en-
closure, move the VFD Test/Run switch into the "RUN"
position. Close the VFD enclosure and engage the main
VFD disconnect.
Check Motor Rotation
1. Disengage the main VFD disconnect. Open the VFD en-
closure and engage the control power circuit breaker.
2. Then engage the oil pump circuit breaker located in the
same section of the starter cabinet. Close the VFD enclo-
sure door.
3. Finally, close the main disconnect on the front of the VFD
enclosure.
4. The ISM mounted in the VFD enclosure checks for prop-
er phase rotation as soon as power is applied to the starter
and the PIC II controls power up.
5. An alarm message will appear on the ICVC if the phase
rotation is incorrect. If this occurs reverse any 2 of the 3
incoming power leads to the starter and reapply power.
The motor is now ready for a rotation check.
6. After the default screen status message states 'Ready to
Start' press the
LOCAL
forms start-up checks.
7. When the starter is energized and the motor begins to
turn, check for clockwise motor rotation (Fig. 45).
IMPORTANT: Do not check motor rotation during coast-
down. Rotation may have reversed during equalization of
vessel pressures.
Check Oil Pressure and Compressor Stop
1. When the motor is at full speed, note the differential oil
pressure reading on the ICVC default screen. It should be
between 18 and 40 psid (124 to 206 kPad).
2. Press the Stop button and listen for any unusual sounds
from the compressor as it coasts to a stop.
Fig. 45 — Correct Motor Rotation
86
softkey. The PIC II control per-