81
EN
Cod. 3542B230 - Rev. 00 - 02/2022
OMNIA S HYBRID H 3.2
fig. 49 - access to internal components
13.2 Water load and system hydraulic pressure adjustment
The loading pressure of the sold system, as shown on the boiler hydrometer, must be about 1.0 bar. If the system pressure drops to values below the minimum, the
boiler stops and the display shows fault F37.
Once the system pressure has been restored, the boiler will activate the air vent cycle for 300 seconds identified on the display with Fh.
To prevent the boiler from blocking, it is advisable to periodically check the pressure indicated on the pressure gauge when the system is cold. If the pressure is below
0.8 bar, we recommend restoring it.
13.3 Periodic maintenance of the heat pump
The inspection tasks on the unit described below do not require specific technical expertise and are summed up as simple checks on some of the unit components.
The table below list the recommended checks to carry out and the frequency with which to perform them.
Carry out more frequent checks and tasks in the event of more intense use (continual or highly intermittent, close to the operating limits, etc.) or critical uses (essential
service such as data centres, hospitals, etc.)
Maintenance work
Frequency
Visual inspection of the unit structure
Annual
Hydraulic system check
Annual
Electrical system check
Annual
Finned coil and fan check
Annual
Heat pump water exchanger check
Annual
Water filter check
Annual
Heat pump circulation pump check
Annual
• Visual inspection of the unit structure
When checking the status of unit structure components, pay extra attention to the parts subject to oxidation. If the onset of oxidation is visible, treat it with paint that
will either eliminate or reduce the phenomenon. Make sure than the external panels of the unit are firmly secured.
Poor fastening causes noise and abnormal vibrations.
• Hydraulic system check
Visually check that the hydraulic circuit does not have any leaks. Check that the water filters are clean.
• Electrical system check
Check that the unit supply cables are not split, cracked or altered in any way that could compromise the insulation.
Perform an accurate visual inspection of the components of the electrical panel to check for damaged or badly connected components or cables (check
the tightness of the terminal screws).
• Check the finned coil and fans (outdoor unit)
The finned coil exchanger consists of fins made of aluminium or other thin material, so any contact, even accidental, could cause injury from cuts.
Finned coil
Given the function of this component, it is important that the exchanger surface is free from any obstructions cause by objects that could decrease the fan air flow rate
and thus, the performance of the unit. The potential tasks to carry out are:
• removing all the impurities with a brush or by hand, such as paper, leaves, etc. which could obstruct the coil surface;
• if objects are deposited on the fins and removing them manually proves difficult, use a pressurised air or water jet on the surface of the aluminium coil, taking care
to aim the jet vertically to the coil to avoid damaging the fins and in the opposite direction of the air movement induced by the fan;
• comb the fins with the right spacing of the teeth for fins if parts of the fins are bent or crushed.
