Access To Internal Components; Water Load And System Water Pressure Adjustment; System Draining; Heat Pump Routine Maintenance - Ferroli OMNIA HYBRID C Installation, Maintenance And User Manual

15.3 Access to internal components

To access the internal components after having dismantled the front panel (details 1 and 2 fig. 179) it is necessary to rotate the assembly of the heat pump electric
panel and expansion vessel (detail 3 fig. 179).

15.4 Water load and system water pressure adjustment

The filling pressure read on the boiler water gauge (detail 2 - fig. 180) with sy-
stem cold must be approx 1.0 bar. If the system pressure falls below minimum
values, the boiler stops and fault F37 is displayed. Pull out the filling knob (detail
1 - fig. 180) and turn it anticlockwise to return it to the initial value. Always close
it afterwards.
Once the system pressure is restored, the boiler will activate the 300-second air
venting cycle indicated on the display by Fh.
To prevent boiler shutdown, it is advisable to periodically check the pressure on
the gauge with system cold. In case of a pressure below 0.8 bar, it is advisable
to restore it.

15.5 System draining

The drain faucet ring nut is located under the safety valve inside the boiler.
To drain the system, turn the ring (ref. 1 - fig. 181) counter-clockwise to open the
faucet. Do not use any tools; use hands only.
To drain only the water in the indoor unit, first close the shut-off valves between the
system and indoor unit before turning the ring.

15.6 Heat pump 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 (essential 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
Heat pump - Inspection of the water heat exchanger
Inspection of the water filter
Heat pump - 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.
MAINTENANCE
fig. 179 - access to internal components
Cod. 3541T090 - Rev. 00 - 06/2019
3
A
2
1
fig. 180 - Filling knob
1
fig. 181 - Safety valve with drain faucet
Frequency
Annual
Annual
Annual
Annual
Annual
Annual
Annual
B
1
89
EN