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DANGER:
The aluminium fins are thin and sharp. Make sure to always wear appropriate PPE to
avoid cuts and abrasions. Protect the eyes and face against the spraying of water and dirt
during the cleaning process. Wear waterproof shoes or boots and clothes that cover all
the body.
INFORMATION:
In the case of machines installed in aggressive atmosphere where there is a high degree of dirt,
cleaning of the coil must be included in routine maintenance. This type of installation should in any case
be cleaned on a regular basis, removing all dust and particles that settle on the coil as soon as possible
and following the instructions below.
Cu-AL "tube and fin" coils
9.4.1
As a minimum requirement, the coils must be inspected and cleaned on an annual basis after initial commissioning. The frequency
of inspections should be increased in the case of aggressive weather conditions or a high degree of dirt. Follow the instructions below
on how to clean the coils properly:
•
Remove all traces of dirt on the surface. Remove any deposits like leaves, fibres, etc. using a vacuum cleaner (or, if
necessary, a brush or other soft accessory, making sure not to scratch and damage the metal parts). If using compressed
air, always keep the flow of air perpendicular to the surface of the coil to avoid bending the aluminium fins. Be careful not to
bend the fins with the nozzle of the compressed air gun.
Note:
If dirt and contaminants are not removed, rinsing with water will drive them into the coil, making cleaning even more difficult.
Surface dirt and contaminants must be completely removed before rinsing with water.
•
Rinse. Rinse with water. It is possible to use chemical substances (special detergents for finned coils). Rinse by letting
water flow through each passage in the fins until they are perfectly clean. Always aim the jet of water perpendicularly to the
surface of the coil in order to avoid bending the aluminium fins. Avoid hitting the coil with the hose. It is advisable to put a
thumb on the end of the hose to adjust the pressure of the jet of water, rather than use nozzles that could knock against the
coil and damage it.
9.4.2
Treated Cu-Al "tube and fin" coils
There are various types of surface treatment for protecting Cu-Al coils. The general rules are given below. It is advisable, in any case,
to always refer to the specific documentation provided by the supplier with whom we recommend establishing a maintenance contract
with guarantee (Blygold and Fin Guard Silver offer this option).
As a minimum requirement, the coils must be inspected and cleaned on an six-monthly basis after initial commissioning. In coastal
and/or industrial areas, inspections and cleaning should be carried out on a quarterly or monthly basis, depending on the
characteristics of the place and the degree of pollution.
Routine maintenance.
•
Remove all traces of dirt on the surface. Remove any deposits like leaves, fibres, etc. using a vacuum cleaner (or, if
necessary, a brush or other soft accessory, making sure not to scratch and damage the metal parts). If using
compressed air, always keep the flow of air perpendicular to the surface of the coil to avoid bending the aluminium fins.
Be careful not to scratch the coil with the nozzle of the compressed air gun.
•
Rinse. Use a low pressure jet of hot or cold water (refer to the instructions of the coating manufacturer) to rinse the coil,
then wash it with water mixed with the cleaning agent specified by the coating manufacturer, and rinse again.
•
Inspection. After washing, always inspect the coil to check the coating for any signs of damage, deterioration and
corrosion phenomena. Notify the qualified applicator immediately of any signs of damage, deterioration or corrosion on
the coil. The following detergent has been approved for use on coated coils to remove mould, dust, soot, traces of
grease, fluff and other particles, providing that it is used in compliance with the manufacturer's instructions on mixing
and cleaning:
Detergent for coated Cu-Al "tube & fin" coils. Product: Blygold
Retailer: Coil Clean Blygold
Installation, use and maintenance manual
45
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