Vertiv Liebert DSE Packaged 400, Installer/User Manual

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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.
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. Attach suction and discharge gauges to access fittings.
2. Recover refrigerant using an approved recovery procedure and equipment. Use a filter drier when charging the
system with recovered refrigerant.
3. Remove marked pressure transducer and discharge pressure switch. Disconnect all electrical connections.
4. Remove failed compressor.
5. Follow compressor manufacturer’s suggested clean out procedures.
6. Install replacement compressor and make all connections. Replace unloading solenoid.
7. Evacuate, charge and operate per the appropriate procedure per local codes:
NOTICE
Risk of improper component re-installation. Can cause equipment damage.
Identify and mark location of suction pressure transducer and discharge pressure switch. These devices look
similar and they must be reinstalled in their original location.
8.5.7 Compressor Mechanical Failure
If mechanical failure of the compressor has occurred, only the compressor needs replaced. A full system clean-out is not
required..
8.5.8 Replacing a Compressor with Mechanical Failure
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.
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. Front-seat service valves to isolate the compressor. Recover refrigerant using an approved recovery procedure
and equipment
2. Remove failed compressor.
8 Maintenance
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