Safety Shutdown; Before Initial Start-Up; Job Data Required; Equipment Required - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

CHILLED LIQUID temperature is less than the
CONTROL POINT (MAINSTAT screen) minus 5° F
(3° C) (for units with P compressors, 5° F [3° C] is
configurable with RECYCLE SHUTDOWN DELTA T);
or LEAVING CHILLED LIQUID temperature is less
than the CONTROL POINT and the VFD TARGET
SPEED is less than the minimum speed plus RECY-
CLE SHUTDOWN DELTA SPEED and ice build is not
active.
2. ECL CONTROL OPTION is ENABLED and ice build
is not active (ECL control):
The CONTROL POINT has not been increased by at
least 1° F in the last 5 min. and ENTERING CHILLED
LIQUID temperature is less than the CONTROL POINT
minus 5° F (3° C) (for units with P compressors, 5° F
[3° C] is configurable with RECYCLE SHUTDOWN
DELTA T) or ENTERING CHILLED LIQUID tempera-
ture is less than the CONTROL POINT and the VFD
TARGET SPEED is less than the Minimum Speed plus
RECYCLE SHUTDOWN DELTA SPEED.
3. The LEAVING CHILLED LIQUID temperature is less
than the EVAP REFRIG TRIPPOINT plus 3° F
(1.7° C). (NOTE: Refer to Refrigerant Low Tempera-
ture Override.)
Whenever recycle shutdown is active the RUN
STATUS shall be "Recycle."
When the chiller is in RECYCLE mode, the chilled liquid
pump relay remains energized so the chilled liquid temperature
can be monitored for increasing load. The recycle control uses
RECYCLE CONTROL RESTART DELTA T to check when the
compressor should be restarted. This is an operator-configured
function which defaults to 5º F (3º C). This value can be
viewed or modified on the SETUP1 table. The compressor will
restart when the chiller is:
• in LCL CONTROL (ECL CONTROL OPTION
DISABLED) and the LEAVING CHILLED LIQUID
temperature is greater than the CONTROL POINT plus
the RECYCLE CONTROL RESTART DELTA T.
• in ECL CONTROL and the ENTERING CHILLED
LIQUID temperature is greater than the CONTROL
POINT plus the RECYCLE CONTROL RESTART
DELTA T.
Once these conditions are met, the compressor initiates a
start-up with a normal start-up sequence.
An alert condition may be generated if 5 or more recycle
start-ups occur in less than 4 hours. Excessive recycling can
reduce chiller life; therefore, compressor recycling due to
extremely low loads should be reduced.
To reduce compressor recycling, use the time schedule to
shut the chiller down during known low load operation periods,
or increase the chiller load by running the fan systems. If the
hot gas bypass is installed, adjust the values to ensure that hot
gas is energized during light load conditions. Increase the
RECYCLE CONTROL RESTART DELTA T on the SETUP1
table to lengthen the time between restarts.
The chiller should not be operated below design minimum
load without a hot gas bypass installed.
A safety shutdown is identical to a
Safety Shutdown —
manual shutdown with the exception that, during a safety
shutdown, the ICVC displays the reason for the shutdown, the
alarm light blinks continuously, and the spare alarm contacts
are energized.
After a safety shutdown, the
pressed to clear the alarm. If the alarm condition is still present,
the alarm light continues to blink. Once the alarm is cleared,
the operator must press the
restart the chiller.
softkey must be
RESET
or softkeys to
CCN LOCAL

BEFORE INITIAL START-UP

Job Data Required

• list of applicable design temperatures and pressures
(product data submittal)
• chiller certified prints
• starting equipment details and wiring diagrams
• diagrams and instructions for special controls or options
• 23XRV Installation Instructions
• pumpout unit instructions

Equipment Required

• T30 hexalobular socket screw driver to remove control
center door shipping brackets
• mechanic's tools (refrigeration)
• digital volt-ohmmeter (DVM)
• clamp-on ammeter
• electronic leak detector
• absolute pressure manometer or wet-bulb vacuum indi-
cator (Fig. 38)
• 500-v insulation tester (megohmmeter) for compressor
motors with nameplate voltage of 600 v or less
• Reliance LCD OIM (operator interface module)
(optional)
Using the Optional Storage Tank and Pump-
Refer to Chillers with Storage Tanks sec-
out System —
tion, page 87 for pumpout system preparation, refrigerant
transfer, and chiller evacuation.
Remove Shipping Packaging —
aging material from the control center, oil pump, VFD cooling
solenoid, HGBP solenoid, oil reclaim actuator, oil heater termi-
nal boxes, and relief valves.
Open Oil Circuit Valves —
ter isolation valves (Fig. 14) are open by removing the valve
cap and checking the valve stem.
The oil charge for the 23XRV chiller is split
Oil Charge —
between the cooler and the oil vaporizer:
FRAME COOLER
SIZE CHARGE
A
B
1 gal.(3.8 L)
3
4
5
The chiller is shipped with its oil charge. The oil level in the
vaporizer will initially be in the center of the oil sump sight
glass. This level will vary depending on the amount of refriger-
ant that has been absorbed by the oil and the operating
conditions of the chiller. Normal oil levels will vary from the
top of the strainer housing sight glass to above the top of the oil
sump sight glass.
If oil is added, it must conform to Carrier's specification for
screw compressor use as described in the Oil Specification
section. Charge the oil through the oil charging valve located
near the bottom of the oil strainer housing. The oil must be
pumped from the oil container through the charging valve due
to the higher refrigerant pressure. The pumping device must be
able to lift from 0 to 200 psig (1379 kPa) or above unit
pressure. Oil should only be charged or removed when the
chiller is shut down.
Tighten All Gasketed Joints —
relax by the time the chiller arrives at the jobsite. Tighten all
gasketed joints to ensure a leak-tight chiller. See Tables 8 and 9
for waterbox torque specifications.
62
Remove any pack-
Check to ensure the oil fil-
OIL SUMP
TOTAL
CHARGE
10.0 gal.
9.0 gal.(34.1 L)
(37.9 L)
Gaskets normally