Table of Contents
Advertisement
8.2.3 Compressor Motor Burnout
If a burnout has occurred, a full system clean-out is required. If not cleaned, compressor and system
problems will continue.
Consult the factory for compressor maintenance. Do not attempt to remove the compressor without first
contacting Vertiv support at 1-800-543-2778.
8.2.4 Unloading Solenoid(s) on a Digital-scroll Compressor
When replacing a digital-scroll compressor, the digital solenoid valve and coil must be replaced. The
compressor and valve kit are shipped separately. The valve kit must be field-brazed to the top of the
compressor in proper orientation and supported with the original factory bracket.
8.2.5 Replacing the Compressor
WARNING! Risk of electric shock. Can cause serious injury or death. The Liebert® iCOM
microprocessor does not isolate power from the unit, even in the "Unit Off" mode. Some internal
components require and receive power even during the "unit off" mode of the Liebert® iCOM
control. Open all local and remote electric power disconnect switches and verify with a
voltmeter that power is Off before working on any component of the system.
WARNING! Risk of over-pressurization of the refrigeration system. Can cause explosive
discharge of high-pressure refrigerant, loss of refrigerant, environmental pollution, equipment
damage, injury, or death. This unit contains fluids and gases under high pressure. Use extreme
caution when charging the refrigerant system. Do not pressurize the system higher than the
design pressure marked on the unit's nameplate. Relieve pressure before cutting into or
making connections/disconnections to the piping system.
NOTICE
Risk of improper component re-installation. Can cause equipment damage.
Identify and mark location of the discharge pressure switch. It must be reinstalled in its original
location.
NOTE: Failure to properly clean the system after compressor-motor burnout voids the compressor
warranty. Follow the manufacturer's procedure.
NOTE: Release of refrigerant to the atmosphere is harmful to the environment. Refrigerant must be
recycled or discarded in accordance with federal, state and local regulations.
1.
Disconnect power.
2. Attach suction and discharge gauges to access fittings.
3. Recover refrigerant using an approved recovery procedure and equipment. Use a filter drier
when charging the system with recovered refrigerant.
4. Remove the temperature thermistor from the discharge line and make a note of its location
because you will need to re install it.
5. Unsweat refrigerant connections and disconnect all electrical connections.
6. Remove failed compressor.
8 Maintenance
29
Hide quick links:
Advertisement
Table of Contents
