Atlantic alfea extensa + - 11 Maintenance of the installation; 11.1 Hydraulic checks; 12 Maintenance

Ensure that the general electrical power supply has
been cut off before starting any repair work.
11.1 Hydraulic checks
" Warning : If frequent rells are required it is
essential that you look for any leaks.
If lling and re-pressurization are required,
check what type of uid has been used initially.
Recommended lling pressure: 1 to 2 bar (Precise
lling pressure is determined by the manometric height
of the installation).
Each year,
- Check the expansion vessel pressure (precharge 1 bar)
and the correct functioning of the safety valve.
If the installation is tted with a DHW tank:
- Verify the safety unit on the cold water supply inlet.
Make it work as prescribed by the manufacturer.
- Check the shut-off.
11.2 Checking the outdoor unit
- Dust off the heat exchanger if necessary, being careful
not to damage the ns.
- Straighten the vanes using a comb.
- Check that there is nothing obstructing the passage
of air.
- Check the fan.
- Verify that condensate drain is not obstructed.
• Checking the refrigeration circuit
- When the refrigerant charge is in excess of 2kg
(models >10kW) it is compulsory to have an approved
after sales service check the refrigeration circuit every
year (with a certicate of capacity for the handling of
refrigerants) (see para. 2.1, page 13).
- Check the lack of leak (connections, valves…).
11.3 Electrical checks
- Check connections and possible tightening.
- Check the cables condition and electronic boards.
12.1 Emptying the hydraulic unit
- Remove the front panel from the hydraulic unit.
- Open the emptying valve,
- Open the hydraulic unit’s manual bleed-tap,
- Open the installation bleed tap.
12.2 Distribution valve
If the installation is tted with a DHW tank.
Carefully comply with the direction for tting the
distribution valve.
Channel AB : Inlet to the hydraulic unit .
Open channel A : Return from DHW tank.
Open channel B : Return from the heating circuit.
11 Maintenance of the installation
12 Maintenance
Installation and operation manual "1734 - EN"
Heat pump air/water split 1 service alféa extensa +
- 78 -