General Rules For Maintanance; Routine Maintenance - Ferroli OMNIA H Series Installation, Maintenance And User Manual

General Rules for Maintanance

Electrical cabinet
At least once a year have qualifi ed personnel carry out a thorough visual inspection of the components of the electrical panel to check
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for damaged or incorrectly connected components or cables (check the tightness of the terminal screws).
The maintenance is extremely important for the functioning of the system and the regular working of the unit over time.
In accordance with the European Regulation EC 303/2008 , it should be noted that companies and engineers in maintenance , repair, leak testing and
recovery / recycle refrigerant gases should be CERTIFIED in accordance with local regulations.
Maintenance must be performed in compliance with the safety rules and tips given in the manual supplied with the unit.
Routine maintenance helps maintain unit efficiency, reduce the rate of deterioration which each device is subject in time and gather information and
data to understand the efficiency of the unit and prevent failures.
For extraordinary maintenance or in case you need service , contact only to a specialized service center approved by the manufacturer and use original
spare parts.
In accordance with the European Regulation EC 1516/2007 it is necessary to prepare a "equipment record".
Provide anyway a databook (not supplied) that allows you to keep track of interventions made on the unit; in this way it will be easier to properly pro-
gram the various interventions and will facilitate a possible troubleshooting.
Bring on the databook : date, type of intervention made, description of the intervention , measurements , reported anomalies , alarms recorded in the
alarm history , etc. ...

Routine maintenance

The inspections described below, to which the unit must be subjected, do not require specific technical know-how.
They merely include a few simple inspections involving certain parts of the unit.
The table below gives a recommended list of inspections which should be carried out at the indicated intervals.
Provide controls and interventions more frequently in case of heavy (continuous or intermittent high, close to operating limits, etc ...) or critical (essen-
tial service such as data centres, hospital etc ...) use.
MAINTENANCE
Visual inspection of the unit
Inspection of hydraulic circuit
Inspection of electrical system
Inspection of condensing and fans system
Inspection of the water heat exchanger
Inspection of the water filter
Inspection of the water pumps (if present)
• Visual inspection of the structure of the unit
When checking the condition of the parts that form the structure of the
unit, pay particular attention to the parts liable to rust.
If traces of rust are noted, they must be treated with rust-inhibitor paint in
order to eliminate or reduce the problem.
Check to make sure that the external panels of the unit are well fixed.
Bad fixing gives rise to noise and abnormal vibrations.
• Inspection of hydraulic circuit
Check visually to make sure that there are no leaks in the hydraulic circu-
it. Check that water filters are clean.
• Inspection of electrical system
Make sure that power cables that supply the unit are not torn, cracked or
damaged in a way that could impair its insulation.
• Inspection of the ventilated condensing/evaporating section
WARNING: The finned pack exchanger has fins made of aluminium or
some other thin material, thus even accidental contact could cause cuts.
Condensing/Evaporating coils
In view of the function of this component, it is very important for the sur-
face of the exchanger to be as free as possible from clogging caused by
items that could reduce the fan's air flow rate and, thus, the performances
of the unit itself.
The following operations may be required:
- Remove all impurities (such as paper scraps, leaves, etc.) that could be
clogging the surface of the bank either by hand or using a brush (comply
with the above mentioned safety prescriptions).
- If the dirt has deposited on the fins and is difficult to remove by hand,
use a flow of compressed air or pressurized water on the aluminium sur-
face of the coils, remembering to direct the flow in a vertical and opposite
to the standard flow direction to prevent the fins from being damaged.
- "Comb" the coils with the relative tool, using the appropriate comb spa-
cing for the fins if some parts of them are bent or squashed.
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SAFETY AND MAINTENANCE
Axial fans
Visually inspect these parts to make sure that the fans are well fixed to
the bearing grille and that this latter is fixed to the structure of the unit.
Check the fan bearings, and close the terminal box and cable glands.
Bearings damaged and bad fixing are the source of abnormal noise and
vibrations,
• Inspection of the water heat exchangers
The exchangers must ensure the maximum heat transfer possible so
keep them clean and free from dirt that may reduce efficiency; make sure
that the temperature difference between water outlet temperature and
evaporation/condensation does not increase over time, if the difference
exceeds 8 -10 ° C it is necessary to proceed cleaning the water side of
the exchanger, keeping in mind the following: water circulation must be in
the opposite direction than normal, the fluid velocity does not exceed 1.5
times the nominal velocity and use just water or moderately acid products
but only water for final washing.
• Inspection of the water filters
Make sure to clean the filter and remove any impurities that block the
proper flow of water, contributing to increase pressure drop and there-
fore energy consumption of the pumps. Refer to the section "Hydraulic
Connections" too.
• Inspection of the water pumps
Check water leakages, the state of the bearings, the closing of the termi-
nal box and integrity of the cable. Bearings damaged and bad fixing are
the source of abnormal noise and vibrations,
FREQUENCY
Every six months
Every six months
Every six months
Every six months
Every six months
Every six months
Every six months