CVHS-SVN04E-EN
9
Disassembly
General Information
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
•
Evacuate the chiller under 1000 microns; the contractor
should assist a qualified Trane Technician with this
responsibility
•
Recharge the chiller with dry nitrogen to 5 psig; the
contractor should assist a qualified Trane Technician
with this responsibility
•
Replace and/or repair insulation
•
Reconnect electrical connections
•
Spot paint the chiller if necessary
The disassembly and reassembly procedures described in
this manual should be performed only on chillers that have
been ordered with this shell option. The process is to be
initiated by experienced service technicians. Contact your
local Trane Service office for assistance if required.
This manual discusses a typical disassembly process.
Proper lifting techniques vary based on mechanical room
layout.
•
It is the responsibility of the person(s) performing the
work to be properly trained in the safe practice of
rigging, lifting, securing, and fastening the
components involved.
•
It is the responsibility of the person(s) providing and
using the rigging and lifting devices to inspect these
devices to ensure they are free from defect and are
rated to meet or exceed the published weights.
•
Always use rigging and lifting devices in accordance
with the applicable instructions for such devices.
•
Cap or cover open lines to prevent entry of foreign
material
.
Note:
Additional O-rings and couplings are shipped with
the chiller when the separable shell kit is selected.
Also refer to wiring diagram 2311-3555*.
Wiring Disassembly
Before separating shells, remove the purge, the
compressor, wrap pipe, economizer line, control panel,
and the various unit mounted sensors (frame LLIDs) as
indicated. If possible, the best method is to remove the
sensor and carefully coil the wire after labeling the device
and its location to aid in reinstallation. All sensors connect
to the buss wiring with a universal plug. This allows easy
disconnection and reconnection of the sensors.
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 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.
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.
