Vertiv Liebert DSE500, 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. If required, 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.
8.6 General Condenser Maintenance
Periodic attention is necessary for continued satisfactory operation of your unit. Restricted air flow
through the condenser coil, reduced airflow from non-functioning fans and low refrigerant system charge
levels will reduce the operating efficiency of the unit and can result in high condensing temperatures and
loss of cooling. In winter, do not permit snow to accumulate around the sides or underneath the condenser
coil.
Monthly and semi-annual inspections and maintenance are recommended for proper system operation.
Use copies of Preventive Maintenance Checklist on page 47 for each of these inspections.
8.7 Condenser Cleaning
Keeping the outdoor condenser coils clean is an important factor in maintaining peak efficiency, reliability,
and long life of the equipment. The unit will operate more efficiently with frequent cleanings. If you delay
cleaning until heavy build-up occurs, head-pressure problems with the evaporator units can develop.
8.7.1 When to Clean the Condenser Coil
Normal conditions typically dictate cleaning twice a year, in spring and fall. On-site or area conditions
such as cottonwood trees, construction, etc., can increase cleaning frequency. On your standard monthly
preventive maintenance schedule, we recommend a visual inspection of the coil to monitor conditions.
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