MAXA i-32V514T - Cleaning the Finned Coil; Cleaning the Finned Coils Treated with the Anti-Corrosion Method

i-32V5 Air/water inverter heat pumps with axial fansi
31
warranty and could considerably shorten the service life of your product.
OPERAZION
1
month
4
months
6
months
12
months
Filling the water circuit. x
Presence of bubbles in the water circuit. x
Check the proper working of the safety and control devices. x
Check that there are no oil leaks from the compressor. x
Check if there is a possible water leakage from the water circuit. x
Check that the ow switch works properly. x
Check that the crankcase heaters are powered and running. x
Clean the metal lters of the water circuit. x
Clean the nned coil with compressed air or water jet x
Check that the electric terminals both inside the electric panel and in the terminal blocks of the
compressor are well ghtened.
x
Tightening of plumbing connecons. x
Check xing and balancing of the fans. x
Clean the air lters in the electrical panel or replace them if necessary (when present). x
Correct electric voltage and phase imbalance (without load and under load). x
Correct absorpon. x
Check the refrigerant charge and eventual leaks x
Check the operang pressure, superheang and sub-cooling x
Circulaon pump eciency. x
If the unit should be out of service for a long period, drain water from the pipes and from the heat
exchanger. This operaon is necessary if, during seasonal stoppages, ambient temperature is expect-
ed to go down below the freezing point of the employed uid.
x
Check for corrosion/oxidaon x
Check panel fastening x
Check the water quality (see chapter Characteriscs of the system water) and the possible concen-
traon of glycol
x
Check the pressure drops of any lter driers on the liquid line x
Check the hydronic side safety valve x
CLEANING THE FINNED COIL
To correctly clean the coil, follow the instrucons below:
• Remove surface dirt. Deposits such as leaves, bres etc. should be removed using a vacuum cleaner (use a brush or other so accessory
and avoid rubbing against metal or abrasive parts). If compressed air is used, care must be taken to keep the airow perpendicular to the
surface of the baery to avoid bending the aluminium ns. Pay aenon not to bend the ns with the nozzle of the compressed air lance.
• Rinse. Rinse with water. It is possible to use chemical substances (specic detergents for nned coils). Rinse the coils by leng the water run
inside each individual passage of the ns, unl they are perfectly clean. Pay aenon to direct the water jet perpendicular to the surface
of the coil in order not to bend the aluminium ns. Do not strike the coil with the water hose. Apply your thumb at the end of the hose to
increase the pressure of the water jet instead of using specic nozzles which could damage the coil.

The an-corrosion treatment applied to the nned coils (available as an alternave to the standard coils) guarantees protecon against aggres-
sive atmospheres.
The frequency of cleaning depends on the environmental condions and is le to the common sense of the maintenance sta. When oxidizing
dust or grease parcles are observed on the baery surface, cleaning is recommended. In general, in a slightly polluted atmosphere, it is recom-
mended to carry out the cleaning treatment every three months.
Washing should be carried out with preferably hot water (40-60 ° C) and detergent with neutral pH, while rinsing is carried out with abundant
fresh water (50 l / m2).
If the maintenance sta observes a lack of protecve cover on the edge of the ns, it is necessary to contact the nearest service center to pro-
ceed with a new applicaon of the cover and completely restore the protecon against corrosion.