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© STULZ GmbH – all rights reserved EN/06.2018/G42
cybercool 2 scroll original insTrUcTions
7.4 Air circuit
Cleaning of the finned heat exchanger and microchannel coil
For cleaning, you will need a high pressure washer with hot water and an adjustable high pressure nozzle.
The cleaning is also possible with a high pressure washer without hot water and an adjustable high pressure
nozzle.
We recommend the detergent „Snowclean Marine SP“ in a concentration of 1% to max. 5% using a high
pressure washer with hot water (20 °C to max. 40 °C).
The detergent can also be used with cold water, however the cleaning effect is smaller.
WARning
Chemical burns danger
Avoid contact with skin and eyes. Do not swallow. Do not inhale vapours.
The detergent “Snowclean marine SP” causes severe chemical skin burns and eye damage.
Wear eye protection, face shield, protective gloves, and protective clothing.
The detergent "Snowclean marine SP" is highly concentrated and must be diluted with water.
This detergent is aggressive towards painted, varnished and anodized aluminium surfaces!
For coated finned heat exchangers and microchannel coils, we recommend a cleaning with just warm water
without using chemicals. The detergent "Snowclean marine SP" would damage the coating.
Procedure
• first clean the coil with a vacuum cleaner and soft nozzle.
• rinse from the inside out and from bottom to top.
• direct the jet of water always vertically on the fins, to not distort the fins.
• allow the detergent to react on the debris about 1-5 minutes, but do not let it dry.
For rinsing, we recommend to use a high pressure washer with hot water of 50-80 °C.
Rinsing with cold water is less effective.
• rinse all wetted surfaces thoroughly.
• rinse the debris from the inside out and from bottom to top, until the exiting water is completely clean.
• drain the water which has accumulated between the coils (sizes 5-7) by removing the plugs at the bottom
plate.
We accept no liability for consequential damages and improper application.
Condenser and free cooling coil
The air-cooled condenser consists of a microchannel coil. The employed free cooling coils are finned heat
exchangers and consist of copper tubes with aluminium fins.
Through the microchannel coil and the free cooling coil flows outside air during operation of the chiller, these
coils are exposed to environmental influences. This may result in pollution of the coils depending on the local
installation conditions. Pollution worsens the efficiency of the coils and negatively influences the efficiency of
the chiller in all modes of operation.
Therefore, we recommend a semi-annual cleaning of the coils depending on the Installation site and degree of
contamination of the unit.
