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Air to Water Heat Pump (Split integrated DHW type)
11 Maintenance of the installation
Ensure that the general electrical power supply has
been cut off before starting any repair work.
11 .1 Hydraulic checks
" Warning : If frequent refills are required
it is essential that you look for any leaks .
If filling and re-pressurization are required,
check what type of fluid has been used initially.
Recommended
filling
(Precise filling 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.
- Verify the safety unit on the cold water supply inlet.
Make it work as prescribed by the manufacturer.
- Check the shut-off.
- Verify the correct functioning of the distribution valve.
11 .2 Maintenance of the DHW tank
Maintenance of the tank must be undertaken once a year
(The frequency may vary according to water hardness).
11 .2 .1 Emptying the hot water tank
- Remove the facade from the hydraulic unit.
- Close the cold water entry into the tank.
- Open a hot water tap and open the water tank emptying
valve (ref. 1).
11 .2 .2 Descaling
- Empty the water tank.
- Remove the hood of the electrical back-up (ref. 2).
- Disconnect the electrical back-up.
- Unplug the ACI.
- Remove the electrical back-up (ref. 3).
- Remove any limescale deposits that have built up
inside the tank. It is best to let the scale stuck to the
walls of the tank: it forms a protective layer.
- Gently remove any limescale deposit on the glove
finger. Do not use any metal objects or chemical or
abrasive products.
- Replace the joint of the electrical back-up (ref. 4)
each time it is dismantled.
- Replace the electrical back-up and carry out 'crossed'
locking of the nuts.
- Reconnect the electrical back-up.
- Plug in the ACI.
- Replace the hood of the electrical back-up.
- 74 -
pressure:
1
to
2
bar
Close
5
1
figure 58 - Emptying the hydraulic unit
and/or Domestic hot water tank
11 .3 Checking the outdoor unit
- Dust off the heat exchanger if necessary, being careful
not to damage the fins.
- 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 refrigerant circuit :
- When the refrigerant charge is in excess of 2kg
(>10kW models), it is compulsory to have an approved
after sales service check the refrigerant circuit every
year (with a certificate of capacity for the handling of
refrigerants) (see para.
- Check the lack of leak (connections, valves...).
11 .4 Electrical checks
- Check connections and possible tightening.
- Check the cables condition and electronic boards.
- ACI light: In normal operation, the light flashes.
6
Open
4
10.2, page 70)
Installation and operating manual "1768 - EN"
3
2
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