10
CVHM-SVN001C-EN
Disassembly
General Information
This
Installation, Operation, and Maintenance
manual
applies to CenTraVac™ chillers with R-514A and OIL00334/
OIL00335.
Important:
Verify proper refrigerant and oil for your
chiller before proceeding!
Important:
Remove the nitrogen charge from the chiller
vessel before starting any disassembly
procedures.
Note:
New units ship with a 5 psig (34.5 kPag) dry
nitrogen holding charge at nominal 72°F (22.2°C).
Important:
New units that have been factory run-tested
contain residual refrigerant; vent discharge
outdoors.
•
Check to make sure there is a positive pressure holding
charge.
Contractor Responsibilities
•
Handle/lift and rig equipment
•
Protect all internal components from exposure to
elements, which could contaminate or corrode chiller
components
•
Chiller reassembly
•
Replace all gaskets with new gaskets or O-rings and
sealing compound; the contractor should assist a
qualified Trane Technician with this responsibility
•
Change the compressor oil; the contractor should
assist a qualified Trane Technician with this
responsibility
•
Evacuate the chiller under 1000 microns; the contractor
should assist a qualified Trane Technician with this
responsibility
WARNING
Refrigerant under Positive Pressure!
Failure to follow instructions below could result in an
explosion which could result in death or serious injury
or equipment damage. System contains oil and
refrigerant and may be under positive pressure.
Recover refrigerant to relieve pressure before opening
the system. See unit nameplate for refrigerant type. Do
not use non-approved refrigerants, refrigerant
substitutes, or refrigerant additives.
NOTICE:
Equipment Damage!
Mixing refrigerants or oils could result in equipment
damage including bearing damage, introduction of
acids into the chiller, or continuous purge pump-out in
high-head/high ambient applications. CenTraVac
chillers are manufactured with different refrigerant/oil
systems: R-123 chillers using OIL00022 and R-514A
chillers using OIL00334/OIL00335. Verify proper
refrigerant and oil for your chiller and do NOT mix
refrigerants or oils!
WARNING
Heavy Objects!
Failure to follow instructions below or properly lift
component could result in component dropping and
possibly crushing operator/technician which could
result in death or serious injury, and equipment or
property-only damage. Ensure that all the lifting
equipment used is properly rated for the weight of the
component being lifted. Each of the cables (chains or
slings), hooks, and shackles used to lift the component
must be capable of supporting the entire weight of the
component. Lifting cables (chains or slings) may not be
of the same length. Adjust as necessary for even
component lift.
NOTICE:
Equipment Damage!
Failure to remove the strain relief with the sensor could
result in equipment damage. Do NOT attempt to pull
sensor bulb through the strain relief; always remove
the entire strain relief with the sensor.
NOTICE:
Compressor Damage!
POE oil is hygroscopic – it absorbs water directly from
the air. This water is nearly impossible to remove from
the compressor oil and can result in compressor
failures. To prevent POE oil from absorbing water, the
system should not remain open for longer than
necessary. When open, dry nitrogen should flow
through the piping. Only new oil containers should be
used for service and maintenance. Always use the
smallest container size required for the job
requirements. Always leave the oil container tightly
sealed until time of use. Do not reuse oil that has been
opened.
