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Air to Water Heat Pump (Split integrated DHW type)
7 Maintenance of the installation
Ensure that the general electrical power supply has been cut off before starting any repair work.
7 .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.
7 .2
Maintenance of the DHW tank
Maintenance of the tank must be undertaken once a year
(The frequency may vary according to water hardness).
7 .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).
7 .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.
- 64 -
pressure:
1
to
2
bar
Close
5
1
figure 49 - Emptying the hydraulic unit
and/or Domestic hot water tank
7 .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 refrigeration circuit :
When the refrigerant charge is in excess of 2kg
(>10kW models ), it is compulsory to have an approved
after sales service check the refrigeration circuit every
year (with a certificate of capacity for the handling of
refrigerants) (see para.
- Check the lack of leak (connections, valves...).
7 .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
2.1, page
12).
Installation and operating manual "1585 - EN"
3
2
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