- 68 -
Maintenance of the installation
Before performing any maintenance, make sure that all power supplies have been
cut o
ff
.
Stored energy: after cutting o
ff
the power supplies,
wait for 10 minutes before accessing the internal parts of the equipment.
►
Checking the hydraulic circuit
If frequent re
fi
lls are required it is absolutely
essential that you check for any leaks. If
re
fi
lling and a pressure reset are necessary,
check what type of
fl
uid was used initially.
Recommended
fi
lling pressure: between 1 and 2 bar
(the exact
fi
lling pressure is determined by the water
pressure in the installation).
Periodically,
- Check the expansion circuit pressure (pre-in
fl
ation to
1 bar) and the correct operation of the safety valve.
- Check the safety valve on the cold water supply inlet.
Make it operate as advised by the manufacturer.
The safety valve must be operated regularly to remove
scale deposits and verify that it is not blocked.
- Check the shut-o
ff
.
- Check the correct operation of the distribution valve.
►
Maintenance of the DHW tank
Maintenance on the tank must be carried out regularly
(frequency may vary according to water hardness).
▼
Emptying the hot water tank
- Remove the front panel from the hydraulic unit.
- Close the cold water inlet into the tank.
- Connect a pipe on the drain valve of the water tank
drain valve (ref.
1
) for discharging water to the sewer.
The drain pipe must be left open to the atmosphere.
- Open a hot water tap and open the water tank drain
valve (ref.
1
).
▼
Descaling
- Empty the water tank.
- Remove the cowl from the electrical backup (ref.
2
).
- Disconnect the electrical backup.
- Disconnect the ACI.
- Remove the electrical backup (ref.
3
).
- Descale the exchanger to maintain performance.
- Remove any scale deposits that may have accumulated
in the tank. It is best to leave any scale sticking to the
sides of the tank: this forms a protective layer.
- Gently remove any scale deposits on the thermowell.
Do not use any metal objects or chemical or abrasive
products.
- Replace the electrical backup's gasket (ref.
4
) each
time it is dismantled.
- Reinstall the electrical backup and tighten alternate
nuts in rotation.
- Reconnect the electrical backup.
fi
g. 44 - Draining the hydraulic unit and/or hot water tank
- Reconnect the ACI.
- Re
fi
t the cowl on the electrical backup.
►
Checking the outdoor unit
- Remove any dust from the exchanger, if necessary,
while making sure not to damage the blades.
- Straighten the blades using a comb.
- Check that there is nothing blocking the air
fl
ow.
- Check the fan.
- Verify that condensate drain is not obstructed.
►
Checking the refrigeration circuit
- Check there are no leaks (connections, valves…).
►
Checking the electrical circuit
- Check the connections and re-tighten if necessary.
- Check the state of the cables and plates.
- ACI light: During normal operation, this light
fl
ashes.
Ouverture
Fermeture
1
5
6
4
3
2
Close
Open
Alfea Extensa A.I. R32 / INSTALLATION / 2114 - EN
