Alfa Laval Optigo CD Instrucciones De Instalación página 7

Maintenance
General information
The unit does not need special servicing. However, regular checking and maintenance will ensure that the
equipment operates without problems. The maintenance intervals depend on the installation's location and the
operating conditions. During maintenance checks, special attention should be paid to looking for soiling, white
frost and / or icing, leaks, corrosion and vibration..
Cleaning
The planned and guaranteed heat transfer rate of the unit can only be provided if the heat exchanger coil is clean.
Contamination and white frost and / or icing must be removed from the fins and also from the area surrounding
the unit.
Dry dust or dirt can be removed using a brush, a hand brush, with compressed air (max. pressure 3 bar; against
direction of air movement) or using a powerful industrial vacuum cleaner.
If possible, always brush in the longitudinal direction of the fins! Use soft brushes!
Never brush across the longitudinal direction of the fins!
Heavier wet or greasy soiling must be removed using a high-pressure water jet (max. pressure 2 bar), steam
pressure jet (max. pressure 2 bar) at a distance of 200 to 300 mm, using a neutral cleaning agent if necessary,
and always against the direction of air movement. As much as possible, cleaning should be carried out from the
middle to the sides and top down. As much as possible, the jet of the cleaner should be held vertical to the fin
package (max. deviation of ± 5 degrees) to prevent fin bending. Cleaning must be continued until all dirt is washed
away.
Attention
When cleaning: unit must be disconnected from the refrigerating system as well as from the power
supply! Water and steam jets must be kept well away from electrical connections and electric motors.
Only use cleaning agents that are compatible with the materials from which the units are made, they may
be neither aggressive nor corrosive.
Contamination and white frost and / or icing in the fans and the fan protection guards must be removed at regular
intervals, since they cause unbalances and even disintegration or engine output loss. The fan motors themselves
are maintenance-free.
Fans and protection guards that have been removed or opened for maintenance must invariably be
replaced in their original positions; only then the unit may be decommissioned!
Mechanical cleaning with hard objects (e.g. wire brushes, screwdrivers or similar) will damage the heat
exchanger: They are not permitted!
Repair
Before beginning with maintenance and repair work, the HFC refrigerant must be siphoned off and the
electrical connections must be cut off from the power supply so that the work can be carried out
without danger.
Maintenance and repair work must be carried out in such a way that danger to people and property is
avoided as much as possible.
© Alfa Laval
IM100535 Rev 01
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