Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW User Manual

The best overall condenser coil cleaner to use is plain water. If the coil has been maintained and 

cleaned at regular intervals, water is sufficient to remove dirt and debris from the fins. Heavy build 

up on the exterior of the fins can be removed with a brush. Water pressure from a garden hose and 

sprayer usually works well. If a pressure washer is used, make sure the equipment is set to a lower 

pressure setting and that the nozzle is set to the fan spray, not stream. Otherwise, damage to the fins 

could result. If a cleaner is required, Emerson recommends using a neutral cleaner, neither acidic nor 

base. Acid-type cleaners can damage the coil fins and surrounding areas. Many sites do not allow the 

use of acidic cleaners for environmental reasons.

The Liebert MC coil is accessible for cleaning through the innovative cleaning window design, 

allowing you to clean the coil without removing the fans from the unit. First, this requires 

disconnecting the power supply before working on the unit and then opening the cleaning window(s) 

on the side of the unit by loosing the mounting screws. Then insert a spray nozzle on the end of a 

suitable extension and apply the water/cleaning solution, working back and forth across the coil face. 

The solution will push the dirt and debris out the bottom of the coil. If you are using a cleaner along 

with the spraying process, follow recommended manufacturer instructions and be sure to rinse the 

coil thoroughly. Any residue left on the coil can act as a magnet to dirt. Reinstall the cleaning 

window(s) and reconnect the power supply to the condenser.
Spraying the coil from the outside repeatedly can push a majority of the dirt to the inner section of the 

fins and continue to restrict air flow. Keep in mind you may not have the luxury of shutting the 

unit(s) down for an extended time. A scheduled shutdown with the operator may be in order.

Risk of using damaging cleaning agents, including non-base paint solvents. Can cause 

equipment damage and damage to property and loss of refrigerant charge.
Using acid-based or sodium hydroxide-based cleaners can damage the Liebert MC condenser 

coil and cause a loss of charge. This could cause equipment damage as well as damage to the 

surrounding structure.