Initial Start-Up; Preparation; Check Motor Rotation; Check Refrigerant Lube - Carrier AquaEdge 19DV Series Start-Up, Operation And Maintenance Instructions Manual

IMPORTANT: When screen display calibration is complete, do
not press Calibration Enable/Dsable since the new values will
be deleted. Values are kept by exiting the pressure sensor table.
Fig. 31 — Pressure Sensor Calibration Menu

INITIAL START-UP

Preparation

Before starting the chiller, verify:
1. Power is on to the VFD, chiller control panel, water
pumps, and other equipment as required.
2. Cooling tower water is at proper level and at-or-below
design entering temperature.
3. Chiller is charged with refrigerant and all refrigerant
valves are in their proper operating positions.
4. Valves in the evaporator and condenser water circuits are
open and flow is as per design.
NOTE: If the pumps are not automatic, ensure water is circulating
properly.
CAUTION
Do not permit water or brine that is warmer than 150°F
(65°C) to flow through the evaporator or condenser. Refrig-
erant overpressure may discharge through the relief device
and result in the loss of refrigerant charge (applicable only
with standard Charlotte rupture disk).
5. Access the PUMPDOWN/LOCKOUT feature from the
Maintenance Menu. Press the End Lockout button on the
touch screen and accept the "press OK to Terminate Lock-
out?" prompt. The unit is reset to operating mode. The chiller
is locked out at the factory to prevent accidental start-up.

Check Motor Rotation

1. Close the starter enclosure door.
2. Apply 3-phase power to drive.
3. The VFD checks for proper phase rotation as soon as power
is applied to the starter and the PIC6 controls power up.
4. An alarm message will appear on the HMI screen 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.
5. Go to Main Menu, Quick Test and Enable Quick Test fol-
lowing by enabling Motor Rotation Check. This starts the
following sequence:
a. Fully open the first IGV (inlet guide vane).
b. Open evaporator control valve, open condenser drain
valve, close condenser control valve, and close evapora-
tor control valve. Run refrigerant pump for 30 seconds.
c. Start the motor and ramp to 5 Hz in 10 seconds.
d. Once the motor speed reaches 5 Hz, stop motor.
e. Stop refrigerant pump 1 minute after motor speed
reaches 5 Hz, then reset all 4 refrigerant lubrication
valves to close.
f. Three minutes after motor speed reaches 5 Hz, close
first IGV. Status can be followed in Quick Test as
Check State IDLE=0, PreLub=1, Rotat=2, PosLub=3,
End=4.
6. When the VFD is energized and the motor begins to turn,
check for clockwise motor rotation through first stage
sight glasses. See Fig. 32.
IMPORTANT: Do not check motor rotation during coast-
down. Rotation may have reversed during equalization of
vessel pressures.
CORRECT MOTOR ROTATION
IS CLOCKWISE WHEN VIEWED
THROUGH SUCTION PIPE
LEADING TO COMPRESSOR
1ST STAGE SIGHT GLASS
Fig. 32 — Correct Motor Rotation

Check Refrigerant Lube

1. In Quick Test the refrigerant lube pressure can be checked.
Open evaporator control valve, then run the refrigerant pump.
Pressure drop across the refrigerant pump must exceed 8 psig
(55 kPa). If pressure drop is negative, check the pump rota-
tion. If pressure drop is below 8 psig (55 kPa), check for
clogged filter drier or bearing supply filter.
2. Press the Stop button and listen for any unusual sounds
from the compressor as it coasts to a stop.

To Prevent Accidental Start-Up

A chiller STOP override setting may be entered to prevent ac-
cidental start-up during service or whenever necessary. From
the Main Menu, access the General Parameters Menu and use
the down arrow to reach Stop Override on the GENUNIT table.
Change Stop Override to Yes; then execute the command by
touching the lightning button. The message "ALM-276 Protec-
tive Limit - Stop Override" will appear in the Home Screen
message area. To restart the chiller, access the same screen and
change the Stop Override option to No.

Check Chiller Operating Condition

Check to be sure that chiller temperatures, pressures, water
flows, and refrigerant levels indicate the system is functioning
properly.
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