12.8 Outdoor Heat Rejection Condenser Maintenance
Restricted airflow will reduce operating efficiency and could result in high compressor head pressure and loss of cooling.
• Clear the coil surface of all debris that will inhibit airflow.
• Check for bent or damaged coil fins and correct.
• Do not permit snow to accumulate around or under the outdoor unit.
• Periodically consider commercial cleaning of the coil surface.
• Inspect fans, motors, and controls for proper operation.
• Check all piping and capillaries for proper support.
• Inspect for leaks.
• Check contactors for pitting. Replace if pitted.
12.9 Mesh Filter Cleaning
1. Close valves on filter inlet and outlet to Isolate filter in top module.
2. Vent pressure from filter through ball valve at filter outlet.
3. Remove clamp holding on filter cap and pull filter tube out of unit (cap may be hard to remove due to suction and
gasket seating; carefully use a tool to help pry the edge up if gently rocking and twisting cap doesn’t work.)
4. Cleaning process
a. Backflushing
In this process, the flow of media in the filtration system is reversed as a means of removing clogged or
accumulated particles from the mesh apertures. This is an important step for cleaning wire mesh filters, as
removing hard-to-reach particles can help ensure that the filtration system remains compliant throughput.
Do not use high velocity jets for this.
b. Pressure Washing (optional)
Pressure washing is the use of pressurized jets of water to clean stubborn particles that are normally
difficult to remove. While this method minimizes the amount of daily manual scrubbing, it is not as effective
as the backflushing method when attempting to remove particles that are clogged in the mesh. Only use
enough pressure to remove particles to avoid damage to liner.
5. Briefly submerge the wire mesh in a bath filled with warm water.
6. Be sure to gently scrub it with soft nylon brushes, while it is submerged to remove more stubborn contaminants.
7. Rinse thoroughly with clean water, then you may wish to blot, or gently blow dry.
100 Proprietary and Confidential ©2024 Vertiv Group Corp. 12 Maintenance
Vertiv™ CoolPhase CDU Installer/User Guide
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