Commissioning; Heat Pump Commissioning; Preliminary Heat Pump Checks; Refrigerating Part - Ferroli OMNIA ST 3.2 Manuel D'installation, D'utilisation Et D'entretien

OMNIA ST 3.2

11. COMMISSIONING

11.1 Heat pump commissioning

Before starting for the first time, after a long pause it is necessary to carry out the following preliminary checks concerning the electrical part and the refrigerating part..

11.1.1 Preliminary heat pump checks

Refrigerating part

• Check that the unit is charged with refrigerant. The control can be carried out with portable freon pressure gauges fitted with a 1/4 "SAE revolving coupling with a
depressor connected to the tap service outlet. The pressure read must correspond to the saturation pressure corresponding to the ambient temperature (~ 7 bar) .
• Perform a visual check on the refrigeration circuit making sure it is not damaged.
• Check that the pipes are not dirty with oil (oil stains allow the refrigeration circuit to break).
DANGER
Disconnect the power supply before carrying out any operation on the electrical panel of the unit.
After installing the indoor and outdoor units, check the following before powering them up:
• Wiring. Make sure that the electrical connections of the various parts of the system such as boiler, temperature probes, 2 and 3-way valves, pumps have been
carried out in accordance with the instructions in this manual, the wiring diagram supplied with the unit and in compliance with the laws and local regulations.
• Fuses, switches, or protection devices. Check that the fuses or protection devices installed locally are adequately sized based on the maximum current absorbed
by the unit as reported in this manual. Check that these protection devices are not bypassed.
• Grounding. Make sure that the earth wires have been connected correctly and that the earth terminals are tightened.
• Visually check the electrical panel to check for loose connections or damaged electrical components.
• Mounting. Check that the unit is mounted correctly to avoid abnormal noise and vibration when starting up the unit.
• Damaged components. Check the inside of the unit to check for damaged components or crushed pipes.
• Refrigerant leakage. Check the inside of the unit to check for refrigerant leaks. If there is a loss of refrigerant, contact the technical assistance service.
• Supply voltage. Check that the supply voltage to the unit corresponds to the power supply voltage indicated on the nameplate of the unit.
• Make sure the water shut-off valves are completely open

11.2 Setting to be done during the initial check of the product

For the correct functioning of the system it is mandatory to make the correct settings that depends on the type of the system served by the unit.
For more details see "9. START-UP AND CONFIGURATION" on page 116 .

11.3 Final check before turning on the unit

When the installation is complete and all the necessary settings have been made, reassemble and close all the panels of the unit.

11.4 Turn on the unit

When power is supplied to the unit, the controller display needs around 10 seconds for the activation (initialization phase). During this process the user interface cannot
be used. To activate the system, refer to "8. USER INTERFACE" on page 106.

12. MAINTENANCE

12.1 General notes

In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to be carried out at regular intervals.
IMPORTANT
DANGER
All maintenance work and replacements must be carried out by skilled qualified personnel.
Before carrying out any operation inside the indoor unit, disconnect the power and close the gas cock upstream.
Otherwise there may be a danger of explosion, electric shock, suffocation or poisoning.
Do not touch the refrigerant circuit pipes and the internal parts (pump, safety valve, etc.) during and immediately after switching off the unit as they can be very hot or
very cold, causing scucking or burning or freezing. To avoid injury, allow sufficient time for the temperature of the pipes to drop to normal values and wear protective
gloves.
Before carrying out any maintenance or repair work, always disconnect the power supply to the unit and to all electrical loads (pumps, valves, electric heater for DHW
boiler and plant, etc.).
Some electrical components may be very hot.
Due to the risk of high residual voltage, after having disconnected the power supply to the outdoor unit, wait at least 10 minutes before touching live parts.
The compressor oil heater can work even if the compressor is stopped.
Make sure not to touch powered electrical cables.
Do not wash the unit. This may cause electric shock or fire.
When the service panels are removed, live parts could easily be touched by mistake.
Never leave the unit unattended during installation or maintenance when the service panel has been removed.
It is not allowed to tamper with or modify any component, nor the settings of the intervention values of the protection devices installed in the unit.
Do not pull, disconnect, twist the electric cables coming from the unit even if disconnected from the power supply.
It is forbidden to leave containers of inflammable substances near the unit.
Cod. 3541V991 - Rev. 01 - 10/2021
127
EN