Ariston ACO 27 MFFI Instructions d'installation et d'entretien - Page 39

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5. MAINTENANCE

5.1.

ENERAL

EMARKS

IMPORTANT!!

Every time that the combustion chamber cover or the

primary heat exchanger is removed from the boiler, the

combustion chamber seal must be replaced (code:

65102217). The silicone grease provided with the

gasket must be spread around the area the gasket fits

to ensure an airtight seal.

Only the grease provided must be used, however,

should more grease be needed it must have a

temperature range of between –40 deg C and +200

deg C"

5.2.

LEANING THE

IMPORTANT!!

Every time that the combustion chamber cover or the

primary heat exchanger is removed from the boiler, the

combustion chamber seal must be replaced (code:

65102217). The silicone grease provided with the

gasket must be spread around the area the gasket fits

to ensure an airtight seal.

Only the grease provided must be used, however,

should more grease be needed it must have a

temperature range of between –40 deg C and +200

deg C"

5.3.

LEANING THE

NB: if the boiler is not to be used for a prolonged period, the

condensate trap should be filled before igniting it again. A

shortage of water in the trap is dangerous because there is the

risk of exhaust fumes escaping into the air.

5.4.

PERATIONAL

RIMARY

XCHANGER

ONDENSATE

RAP

EST

It is recommended that the following inspections be carried out

on the boiler at least once a year:

Check the seals in the water group and, if necessary, replace the

gaskets and restore the seal to perfect working order.

Check the seals in the gas group and, if necessary, replace

the gaskets and restore the seal to perfect working order.

Visually check the overall state of the boiler.

Visually check the combustion and, if necessar y,

disassemble and clean the burner.

Following inspection 3, disassemble and clean the

combustion chamber, if necessary.

Following inspection 4, disassemble and clean the injector, if

necessary.

Clean the primary heat exchanger (see section 6.2)

Regulate the correct rate of flow of the gas: rate of flow on

ignition, partially loaded and at maximum load.

Check the correct functioning of the heating safety devices:

- temperature limit safety device.

10. Check the correct functioning of the gas group safety

devices:

- absence of gas or flame safety device (Ionisation).

11. Check that the electrical connections are correct (in

conformity with the instructions manual).

12. Check the efficiency of the production of domestic hot water

(test the rate of flow and temperature).

13. Carry out a general inspection of the functioning of the boiler.

14. Check the characteristics for expulsion of the products of

combustion.

15. Remove the oxide from the detection electrode by means of

an emery cloth.

CLEANING THE EXHAUST SIDE

Remove the combustion chamber inspection hatch (see section

6.3.5). Check that the exhaust passages between the blades of

the block are free; if there are deposits present, wash the blades

with compressed air, water or a vinegar-based detergent.

NOTE: it is possible to use a brush in order to mechanically

remove the residues.

Use of detergents:

soak the blades well

allow the detergent to act for about 20 minutes

rinse with a strong jet of water to remove the deposits (the

control panel must be kept closed)

make sure that there are no traces of detergents in the

exchanger.

CLEANING THE WATER SIDE

Use detergents that dissolve CaCO3. Leave to act for a short

time (in order not to damage the aluminum) and then rinse.

Make sure that the detergent does not remain inside the

exchanger.

Unscrew the lower part of the condensate trap and clean it.

Lastly, fill it with water and replace the stopper.

After having carried out the maintenance operations, fill the

heating circuit to a pressure of approx. 1.5 bar and release the

air from the system. Also fill the domestic hot water system.

Place the boiler in operation.

If necessary, release the air again from the heating system.

Check the settings and the correct functioning of all the

control, regulation and monitoring parts.

Check the seal and the correct functioning of the system for

expelling fumes/drawing of combustion air.

Check that the boiler ignites properly and carry out a visual

check on the burner flame.