Yearly Appliance Check And Maintenance; Finned Air Coil Maintenance - Immergas MAGIS HERCULES PRO MINI 6 Instructions And Recommendations

3.3

YEARLY APPLIANCE CHECK AND MAINTENANCE

The following checks and maintenance should be performed once a year to ensure operation, safety and efficiency of the appli-
ance over time.
- Check for water leaks or oxidation from/on the fittings.
- Check, after discharging the system pressure and bringing it to zero (read on indoor unit pressure gauge), that the expansion vessel
charge is at 1.0 bar.
- Check that the system static pressure (with system cold and after refilling the system by means of the filling valve) is between 1 and 1.2
bar.
- Check the pressure of the two 2x12L DHW vessels.
- Visually check that the safety and control devices have not been tampered with and/or short-circuited.
- Check the condition and integrity of the electrical system and in particular:
- The power cables must be inside the cable fixings;
- There must be no traces of blackening or burning.
- Check correct lighting and operation.
- Check correct operation of control and adjustment devices and in particular:
- system regulation probes intervention.
- Check chiller line connections.
- Check mesh filter on system return.
- Check the correct flow rate on plate heat exchanger.
- Check the integrity of the internal insulation.
In addition to yearly maintenance, one must also check the energy efficiency of the thermal system, with frequency and proce-
dures that comply with the indications of the technical regulations in force.
3.4

FINNED AIR COIL MAINTENANCE

We recommend regularly inspecting the finned air coils to check the level of fouling.
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.).
- 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 ex-
changers.
- Proper and frequent cleaning (approx. every three months) prevents 2/3 of corrosion problems.
Clean the air coil using suitable products.
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