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 flow switch works properly.
x
Check that the crankcase heaters are powered and running.
x
Clean the metal filters of the water circuit.
x
Clean the finned 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 tightened.
x
Tightening of plumbing connections.
x
Check fixing and balancing of the fans.
x
Clean the air filters 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 absorption.
x
Check the refrigerant charge and eventual leaks
x
Check the operating pressure, superheating and sub-cooling
x
Circulation pump efficiency.
x
If the unit should be out of service for a long period, drain water from the pipes and from the heat
exchanger. This operation is necessary if, during seasonal stoppages, ambient temperature is expect-
ed to go down below the freezing point of the employed fluid.
x
Check for corrosion/oxidation
x
Check panel fastening
x
Check the water quality (see chapter Characteristics of the system water) and the possible concen-
tration of glycol
x
Check the pressure drops of any filter driers on the liquid line
x
Check the hydronic side safety valve
x
9.1
CLEANING THE FINNED COIL
To correctly clean the coil, follow the instructions below:
•
Remove surface dirt. Deposits such as leaves, fibres etc. should be removed using a vacuum cleaner (use a brush or other soft accessory
and avoid rubbing against metal or abrasive parts). If compressed air is used, care must be taken to keep the airflow perpendicular to the
surface of the battery to avoid bending the aluminium fins. Pay attention not to bend the fins with the nozzle of the compressed air lance.
•
Rinse. Rinse with water. It is possible to use chemical substances (specific detergents for finned coils). Rinse the coils by letting the water run
inside each individual passage of the fins, until they are perfectly clean. Pay attention to direct the water jet perpendicular to the surface
of the coil in order not to bend the aluminium fins. 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 specific nozzles which could damage the coil.
9.1.1 Cleaning the finned coils treated with the anti-corrosion method
The anti-corrosion treatment applied to the finned coils (available as an alternative to the standard coils) guarantees protection against aggres-
sive atmospheres.
The frequency of cleaning depends on the environmental conditions and is left to the common sense of the maintenance staff. When oxidizing
dust or grease particles are observed on the battery 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 staff observes a lack of protective cover on the edge of the fins, it is necessary to contact the nearest service center to pro-
ceed with a new application of the cover and completely restore the protection against corrosion.