7 Servicing of the installation
Before carrying out any work, ensure that the general
electrical power supply and the fuel supply valve are
switched off.
7 .1 Checking the hydraulic circuit
"
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 pressure: between 1 and 2 bar
(the precise filling pressure is determined according to
the manometric height of the installation).
Every year,
- Check the pressure of the expansion tank (pre-inflate
to 1 bar) and the correct operation of the safety valve.
- Check the safety unit on the sanitary cold water inlet.
Make it work as prescribed by the manufacturer.
- Check the circuit breaker.
7 .2 Servicing the tank
The tank must be serviced once a year (the frequency
may vary depending on the hardness of the water)
-
Reduce the pressure in the primary circuit (P < 0.5
bar).
-
Drain the tank by turning the security group valve
-
Remove the inspection hatch.
-
Remove any scale deposits that may have accumulated
in the tank. It is preferable to leave any limescale fixed
to the walls of the tank: it forms a protective layer.
-
Gently remove any limescale deposit on the
thermowell. Do not use any metal objects or chemical
or abrasive products.
-
Replace the hatch gasket at each disassembly of the
hatch
-
Reinstall the inspection hatch and tighten the bolts
"crossover".
"
Don’t forget to put the sensor into the sanitary
thermowell .
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 refrigerating circuit:
-
When the volume of refrigerating fluid is over 2 kg, the
refrigerating circuit must be checked every year by a
company that complies with the legal requirements in
-
Check that there are no leaks (connectors, valves...).
7 .4 Checking the electrical circuit
-
Check connections and possible tightening.
-
Checking the condition of the cables and plates.
7 .5 Servicing of the heat exchanger
The boiler must be serviced regularly to maintain high
its output.
Depending on the operating conditions, the servicing
operation is to be carried out once or twice a year.
-
Switch off the electrical power supply to the appliance.
-
Open the firebox door.
-
Remove the turbulators and clean them.
-
Clean the exchanger using a scraper and a nylon
swab Ø 50 mm.
-
Remove residues of cleaning by the soot hatch.
-
Don’t use abrasive material or metal brush on the
ceramic door protection
-
Refit all of the parts correctly.
-
Close the soot hatch and the firebox door, check for
leaks
"
Lightly tighten the screws of the closing door
7 .6 Servicing the burner
The burner must be serviced regularly (cell, jet,
combustion head, electrode, pump filter) by a specialist
once or twice a year depending on the conditions of use.
These servicing operations are detailed in the technical
instructions of the burner.
Before carrying out any work, ensure that the general
electrical power supply and the fuel supply valve are
switched off.
After refitting, check the operation of the burner to
ensure that the setting has not been modified and that
they suit the desired power level if the boiler.
-
The "sweeping" (
) push button authorises the
burner operation for one hour.
-
Create a heating demand to start the burner.
7 .6 .1 Servicing the chimney
The chimney must be checked and cleaned and by a
specialist at least once a year.
7 .6 .2 Servicing the safety appliances
Every year, check that the expansion system is operating
correctly. Check the pressure of the expansion tank and
the calibration of the safety valve.
Check the safety unit on the domestic cold water inlet.
Installation and operating manual
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1605 - EN
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alfea hybrid duo heat pump oil low NOx CH
- 62 -
