Immergas MAGIS COMBO 4 V2 Instructions And Recommendations page 63

This depends on the environment where the unit is installed. The
level of fouling will be worse in urban and industrial sites, as well
as near trees that lose their leaves.
There are two maintenance levels to clean the coils:
- If the air heat exchangers are encrusted, clean them gently with
a brush in a vertical direction.
- Turn off the fans before working on the air heat exchangers.
- To perform this type of intervention, stop the unit only if the
maintenance considerations allow it.
- Perfectly clean air heat exchangers ensure an optimal operation
of the unit. When the air heat exchangers begin to encrust, they
must be cleaned. The cleaning frequency depends on the season
and location of the unit (ventilated, wooded, dusty, etc.).
Clean the air coil using suitable products.
Do not use pressurised water without a large diffuser. Do
not use high-pressure cleaners for Cu/Cu and Cu/Al air
coils.
Concentrated and/or rotating water jets are strictly
prohibited.
Never use fluid with a temperature above 45°C to clean
the air heat exchangers.
Proper and frequent cleaning (approx. every three mon-
ths) prevents 2/3 of corrosion problems.
In addition to yearly maintenance, one must also check
the energy efficiency of the thermal system, with fre-
quency and procedures that comply with the indications
of the technical regulations in force.
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